/* GayaGnan: Learn • Explore • Grow. Brand palette: navy #0A4BAF, orange #FF8A00, green #2E9D4D, yellow #FFC842, pale blue #E6F2FF. */
:root {
  --saffron: #FF8A00;
  --green: #2E9D4D;
  --gold: #FFC842;
  --pale: #E6F2FF;
  --navy: #0b1530;
  --navy-2: #12224a;
  --blue: #0A4BAF;
  --bg: #f6f8fc;
  --surface: #ffffff;
  --surface-2: #eef2fa;
  --text: #17203a;
  --muted: #5d6886;
  --line: #dfe5f1;
  --accent: var(--blue);
  --ok: #1f9d55;
  --warn: #c77700;
  --bad: #d64545;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(16, 30, 70, .06), 0 10px 30px rgba(16, 30, 70, .05);
  --font: "Noto Sans", "Noto Sans Telugu", "Noto Sans Devanagari", system-ui, sans-serif;
  --display: "Baloo 2", "Noto Sans Telugu", "Noto Sans Devanagari", var(--font);
  color-scheme: light;
}
.theme-dark, .lab-view, .hero {
  --bg: #0b1530;
  --surface: #13214a;
  --surface-2: #1a2b5c;
  --text: #eef2ff;
  --muted: #a6b3d6;
  --line: #263a72;
  --blue: #6F9BFF;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1530; --surface: #13214a; --surface-2: #1a2b5c; --text: #eef2ff; --muted: #a6b3d6; --line: #263a72; --blue: #6F9BFF;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] { --bg: #0b1530; --surface: #13214a; --surface-2: #1a2b5c; --text: #eef2ff; --muted: #a6b3d6; --line: #263a72; --blue: #6F9BFF; color-scheme: dark; }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 var(--font); }
.lang-te body, body.lang-te { line-height: 1.8; }
/* Per-script fonts: Latin text keeps Noto Sans, the script font covers the rest. Headings use the
   script font too, since Baloo 2 only has Latin and Devanagari. */
html:lang(bn), html:lang(as) { --script: "Noto Sans Bengali"; }
html:lang(ta) { --script: "Noto Sans Tamil"; }
html:lang(gu) { --script: "Noto Sans Gujarati"; }
html:lang(kn) { --script: "Noto Sans Kannada"; }
html:lang(ml) { --script: "Noto Sans Malayalam"; }
html:lang(pa) { --script: "Noto Sans Gurmukhi"; }
html:lang(or) { --script: "Noto Sans Oriya"; }
html:lang(ur) { --script: "Noto Nastaliq Urdu"; }
html:is(:lang(bn), :lang(as), :lang(ta), :lang(gu), :lang(kn), :lang(ml), :lang(pa), :lang(or), :lang(ur)) {
  --font: "Noto Sans", var(--script), system-ui, sans-serif;
  --display: "Noto Sans", var(--script), system-ui, sans-serif;
}
html:is(:lang(ta), :lang(kn), :lang(ml), :lang(or)) body { line-height: 1.8; }
/* Nastaliq is tall: more line height and slightly smaller type */
html:lang(ur) body { line-height: 2.1; font-size: 15px; }
html:lang(ur) h1, html:lang(ur) h2, html:lang(ur) h3 { line-height: 1.9; }

/* Right-to-left (Urdu): mirror direction-sensitive bits; 3D canvases, maps and formulas stay LTR */
[dir="rtl"] .crumbs, [dir="rtl"] .nav, [dir="rtl"] .foot-links { direction: rtl; }
[dir="rtl"] canvas, [dir="rtl"] .viz, [dir="rtl"] .india-map, [dir="rtl"] .formula, [dir="rtl"] code,
[dir="rtl"] input[type="email"], [dir="rtl"] input[type="url"], [dir="rtl"] .num { direction: ltr; }
[dir="rtl"] ul, [dir="rtl"] ol { padding-right: 1.4em; padding-left: 0; }
[dir="rtl"] .arrow, [dir="rtl"] .next-arrow { display: inline-block; transform: scaleX(-1); }
img, canvas { max-width: 100%; }
a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.theme-dark a, .hero a { color: #9db7ff; }
h1, h2, h3 { font-family: var(--display); line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h2 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
code { background: var(--surface-2); padding: 1px 6px; border-radius: 6px; font-size: .9em; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.wrap { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 820px; }
.section { padding: 28px 16px; }
.wrap.section { padding-left: 16px; padding-right: 16px; }
/* clipped rather than moved off-screen: a negative offset creates a scrollable strip in right-to-left pages */
.skip { position: absolute; inset-inline-start: 8px; top: 0; background: #fff; padding: 8px 12px; z-index: 100; clip-path: inset(50%); width: 1px; height: 1px; overflow: hidden; white-space: nowrap; }
.skip:focus { clip-path: none; width: auto; height: auto; overflow: visible; }
:focus-visible { outline: 3px solid var(--saffron); outline-offset: 2px; }

/* ------------------------------------------------ header */
/* The header is always white: the brand guide puts the full-colour logo on white or pale backgrounds. */
.topbar { position: sticky; top: 0; z-index: 50; background: rgba(255, 255, 255, .96); backdrop-filter: blur(10px); color: #17203a; border-bottom: 1px solid #e1e8f4; box-shadow: 0 2px 12px rgba(10, 75, 175, .06); }
.topbar::before { content: ""; display: block; height: 3px; background: linear-gradient(90deg, var(--saffron) 0 33%, var(--gold) 33% 66%, var(--green) 66%); }
.topbar-in { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: center; flex-shrink: 0; text-decoration: none; }
.brand-logo { display: block; height: 42px; width: auto; }
@media (max-width: 480px) { .brand-logo { height: 36px; } }
.mainnav { display: flex; gap: 2px; flex: 1; flex-wrap: wrap; justify-content: center; }
.mainnav a { color: #1d2b4f; text-decoration: none; padding: 8px 9px; white-space: nowrap; border-radius: 10px; font-size: .92rem; }
.mainnav a:hover, .mainnav a.on { background: var(--pale); color: #0A4BAF; }
.tools { display: flex; align-items: center; gap: 8px; }
.tools select, .mini-search input { background: #f4f7fc; color: #17203a; border: 1px solid #d3ddef; border-radius: 10px; padding: 7px 10px; font: inherit; font-size: .9rem; }
.tools select option { color: #111; }
.mini-search input { width: 150px; }
.mini-search input::placeholder { color: #7a86a6; }
.tools .pill { color: #0A4BAF; border-color: #c9d6ee; background: #fff; }
@media (max-width: 1440px) { .mini-search { display: none; } .lbl-wide { display: none; } }
.mainnav { flex-wrap: nowrap; }
@media (max-width: 1240px) { .mainnav a { padding: 8px 6px; font-size: .88rem; } }
/* Menu labels are longer in many Indian scripts: let the menu shrink and wrap instead of pushing the tools off-screen */
.tools { flex-shrink: 0; }
html:is(:lang(bn), :lang(as), :lang(ta), :lang(gu), :lang(kn), :lang(ml), :lang(pa), :lang(or), :lang(ur), :lang(mr)) .mainnav { flex-wrap: wrap; min-width: 0; }
html:is(:lang(bn), :lang(as), :lang(ta), :lang(gu), :lang(kn), :lang(ml), :lang(pa), :lang(or), :lang(ur), :lang(mr)) .mainnav a { padding: 6px 6px; font-size: .86rem; }
.nav-toggle { display: none; background: none; border: 0; color: #0A4BAF; font-size: 1.6rem; cursor: pointer; }
@media (max-width: 1080px) {
  .nav-toggle { display: block; margin-inline-start: auto; }
  .mainnav, .tools { display: none; }
  .nav-open .mainnav, .nav-open .tools { display: flex; flex-direction: column; align-items: stretch; width: 100%; }
  .topbar-in { flex-wrap: wrap; padding-bottom: 6px; }
  .nav-open .tools { flex-direction: row; flex-wrap: wrap; padding-bottom: 12px; }
  .mini-search input { width: 100%; }
}

/* ------------------------------------------------ buttons, pills, badges */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 16px; border-radius: 11px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: 600 .95rem var(--font); text-decoration: none; cursor: pointer; transition: transform .12s, box-shadow .12s, background .12s; }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:disabled { opacity: .45; cursor: default; transform: none; box-shadow: none; }
.btn-primary { background: #0A4BAF; border-color: #0A4BAF; color: #fff !important; }
.btn-glow { background: linear-gradient(135deg, var(--saffron), #ff6a3d); border: 0; color: #fff !important; box-shadow: 0 6px 24px rgba(255, 120, 50, .35); }
.btn-danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn-sm { padding: 6px 11px; font-size: .85rem; border-radius: 9px; }
.btn-block { width: 100%; margin-top: 8px; }
.btn.on { background: var(--saffron); color: #fff; border-color: var(--saffron); }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--text); text-decoration: none; font: 500 .9rem var(--font); cursor: pointer; }
.pill.on { background: #0A4BAF; color: #fff; border-color: #0A4BAF; }
.pill-lg { padding: 10px 16px; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 16px; align-items: center; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .75rem; font-weight: 700; background: var(--surface-2); color: var(--muted); vertical-align: middle; }
.badge-ok { background: rgba(31, 157, 85, .14); color: var(--ok); }
.badge-warn { background: rgba(199, 119, 0, .14); color: var(--warn); }
.badge-3d { background: rgba(10, 75, 175, .14); color: var(--blue); }
.chip { display: inline-block; padding: 7px 14px; border-radius: 999px; background: rgba(255, 255, 255, .1); color: #fff !important; text-decoration: none; border: 1px solid rgba(255, 255, 255, .2); font-weight: 600; }
.chip:hover { background: var(--saffron); border-color: var(--saffron); }
.chip-sm { padding: 3px 10px; font-size: .8rem; background: var(--surface-2); color: var(--text) !important; border-color: var(--line); }

/* ------------------------------------------------ cards and grids */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); margin-bottom: 16px; }
.card-link { display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: var(--text); transition: transform .15s, border-color .15s; }
.card-link:hover { transform: translateY(-3px); border-color: var(--accent); }
.card-icon { font-size: 2rem; }
.card-actions { display: flex; gap: 8px; margin-top: auto; flex-wrap: wrap; }
.grid { display: grid; gap: 16px; }
.grid > .card { margin: 0; }
.cards-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); }
.cards-3 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.cards-4 { grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); }
.group-title { margin-top: 28px; }
.topic-card { display: flex; flex-direction: column; gap: 6px; margin: 0; }
.subject-card { border-top: 4px solid var(--accent); }
.subject-icon { font-size: 1.9rem; font-family: var(--display); font-weight: 800; color: var(--accent); }
.subject-icon.big { font-size: 3rem; line-height: 1; }
.exam-card strong { font: 800 1.2rem var(--display); }

/* ------------------------------------------------ hero */
.hero { position: relative; overflow: hidden; background: radial-gradient(1200px 600px at 75% 30%, #1f3a8a 0%, #0b1530 60%); color: var(--text); min-height: 560px; display: flex; align-items: center; }
#hero3d { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-in { position: relative; padding: 60px 16px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.6rem); max-width: 640px; color: #fff; }
.hero .lead { max-width: 560px; color: #c9d4f5; font-size: 1.1rem; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--saffron); margin-bottom: 6px; }
.big-search { display: flex; gap: 8px; max-width: 580px; margin: 24px 0; }
.big-search input { flex: 1; min-width: 0; padding: 14px 18px; border-radius: 14px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .1); color: #fff; font: inherit; font-size: 1rem; }
.big-search input::placeholder { color: #aab7e0; }
.big-search.light input { background: var(--surface); color: var(--text); border-color: var(--line); }
.big-search.light input::placeholder { color: var(--muted); }
.grade-chips { display: flex; flex-wrap: wrap; gap: 8px; max-width: 620px; margin-bottom: 14px; }
.lead { font-size: 1.08rem; color: var(--muted); max-width: 820px; }

/* ------------------------------------------------ home */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; margin: 0 0 24px; }
.stats > * { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; text-align: center; text-decoration: none; color: var(--text); }
.stats strong { display: block; font: 800 1.8rem var(--display); color: var(--blue); }
.stats span { color: var(--muted); font-size: .85rem; }
.modules { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 14px; }
.module { display: grid; grid-template-columns: 52px 1fr; grid-template-rows: auto auto; column-gap: 12px; padding: 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--line); text-decoration: none; color: var(--text); box-shadow: var(--shadow); transition: transform .15s; }
.module:hover { transform: translateY(-3px); border-color: var(--saffron); }
.module-icon { grid-row: span 2; font-size: 2rem; display: grid; place-items: center; background: var(--surface-2); border-radius: 12px; height: 52px; }
.module span:last-child { color: var(--muted); font-size: .88rem; }
.daily { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: center; }
@media (max-width: 800px) { .daily { grid-template-columns: 1fr; } }
.flow { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; counter-reset: f; }
.flow li { counter-increment: f; flex: 1 1 150px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; font-weight: 700; position: relative; }
.flow li::before { content: counter(f); display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--saffron); color: #fff; margin-right: 8px; }

/* ------------------------------------------------ classes / subjects */
.crumbs { font-size: .88rem; color: var(--muted); margin-bottom: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.crumbs .sep { opacity: .6; }
.board-picker { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; }
.board-picker select { padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); font: inherit; background: var(--surface); color: var(--text); max-width: 100%; }
.board-picker p { flex-basis: 100%; margin: 0; }
.grade-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
.grade-tile { display: flex; flex-direction: column; align-items: center; padding: 22px 10px; border-radius: 18px; text-decoration: none; color: #fff; box-shadow: var(--shadow); transition: transform .15s; }
.grade-tile:hover { transform: translateY(-4px) scale(1.02); }
.grade-num { font: 800 3rem/1 var(--display); }
.grade-tile .muted { color: rgba(255, 255, 255, .85); }
.stage-primary { background: linear-gradient(135deg, #ff9f43, #ff6b6b); }
.stage-middle { background: linear-gradient(135deg, #1dd1a1, #10ac84); }
.stage-secondary { background: linear-gradient(135deg, #54a0ff, #2e86de); }
.stage-senior { background: linear-gradient(135deg, #a55eea, #6c5ce7); }
.page-head { display: flex; gap: 16px; align-items: center; margin-bottom: 16px; }
.pager { display: flex; justify-content: space-between; gap: 10px; margin-top: 20px; }
.chapter-list { list-style: none; padding: 0; margin: 0; }
.chapter { padding: 0; overflow: hidden; }
.chapter-main { display: flex; align-items: center; gap: 14px; padding: 16px 18px; text-decoration: none; color: var(--text); }
.chapter-main:hover { background: var(--surface-2); }
.chapter-num { flex: none; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px; background: var(--surface-2); font: 800 1.1rem var(--display); color: var(--blue); }
.chapter-title { flex: 1; font-weight: 600; }
.chapter-tags { display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.topic-links { list-style: none; margin: 0; padding: 0 18px 14px 70px; display: grid; gap: 4px; }
.topic-links.big { padding: 0; gap: 10px; }
.topic-links a { font-weight: 600; text-decoration: none; }

/* ------------------------------------------------ lesson */
.lesson-head { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: flex-start; margin-bottom: 12px; }
.lesson-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.bookmark.on { background: var(--saffron); color: #fff; border-color: var(--saffron); }
.lesson-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 22px; align-items: start; }
@media (max-width: 960px) { .lesson-grid { grid-template-columns: 1fr; } }
.lesson-side .card { margin-bottom: 16px; }
.prose { font-size: 1.04rem; }
.prose h3 { margin-top: 1.2em; color: var(--blue); }
.prose ul { padding-left: 1.3em; }
.prose li { margin-bottom: .35em; }
.objectives { border-left: 5px solid var(--blue); }
.remember { border-left: 5px solid var(--saffron); background: linear-gradient(90deg, rgba(255, 138, 0, .08), transparent 60%), var(--surface); }
.objectives ul, .remember ul { margin: 0; padding-left: 1.2em; }
.related { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.related a { display: block; padding: 8px 10px; border-radius: 10px; background: var(--surface-2); text-decoration: none; color: var(--text); }
.related a:hover { background: rgba(10, 75, 175, .12); }
.related em { float: right; font-style: normal; font-size: .8rem; color: var(--muted); }
.scaffold ol { padding-left: 1.3em; }
.facts dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0 0 10px; }
.facts dt { color: var(--muted); font-size: .88rem; }
.facts dd { margin: 0; font-weight: 600; }
.guide { margin-top: 12px; }
.guide summary { cursor: pointer; font-weight: 700; }

/* ------------------------------------------------ 3D viewers */
.viz { position: relative; height: 380px; border-radius: var(--radius); overflow: hidden; background: radial-gradient(circle at 50% 35%, #1d3270, #0a1330 75%); color: #eef2ff; isolation: isolate; }
.viz-tall { height: 520px; }
@media (max-width: 640px) { .viz { height: 320px; } .viz-tall { height: 420px; } }
.viz-card { padding: 10px; }
.viz-poster { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; text-align: center; padding: 20px; }
.viz-icon { font-size: 3.4rem; filter: drop-shadow(0 6px 16px rgba(0, 0, 0, .4)); }
.viz-canvas { position: absolute; inset: 0; }
.viz-canvas canvas { display: block; width: 100% !important; height: 100% !important; }
.viz-labels { position: absolute !important; inset: 0; }
.vlabel { pointer-events: none; font: 600 12px var(--font); color: #fff; background: rgba(8, 16, 40, .7); padding: 2px 7px; border-radius: 6px; white-space: nowrap; }
.vlabel-strong { font-size: 13px; background: rgba(255, 138, 0, .9); }
.map-label { font-size: 11px; background: rgba(8, 16, 40, .55); }
.map-label.ut { background: rgba(255, 255, 255, .85); color: #0b1530; }
.map-label-small { opacity: 0; transition: opacity .15s; }
.map-label-small.hover, .map-label.hover { opacity: 1 !important; z-index: 5; font-size: 13px; }
.viz-bar { position: absolute; top: 10px; right: 10px; display: flex; gap: 6px; z-index: 3; }
.vbtn { width: 34px; height: 34px; border-radius: 9px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(8, 16, 40, .6); color: #fff; cursor: pointer; font-size: 1rem; }
.viz-ui { position: absolute; left: 10px; right: 10px; bottom: 10px; display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: flex-end; z-index: 3; background: rgba(8, 16, 40, .72); border: 1px solid rgba(255, 255, 255, .12); border-radius: 12px; padding: 10px 12px; backdrop-filter: blur(6px); }
.viz-ui:empty { display: none; }
.vctl { display: flex; flex-direction: column; gap: 2px; font-size: .8rem; min-width: 130px; flex: 1 1 130px; color: #dfe6ff; }
.vctl input[type=range] { width: 100%; accent-color: var(--saffron); }
.vctl select { padding: 5px 8px; border-radius: 8px; border: 0; font: inherit; }
.vreadout { flex-basis: 100%; font-size: .9rem; color: #fff; }
.vreadout .sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin: 0 4px 0 10px; vertical-align: -1px; }
.viz-info { position: absolute; top: 10px; left: 10px; max-width: min(320px, 70%); z-index: 3; background: rgba(8, 16, 40, .8); border: 1px solid rgba(255, 255, 255, .15); border-radius: 12px; padding: 10px 12px; font-size: .9rem; }
.viz-info p { margin: 4px 0 0; }
.hist { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; height: 70px; align-items: end; margin: 6px 0; }
.hist div { display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; font-size: .72rem; }
.hist span { display: block; width: 100%; max-height: 100%; background: var(--saffron); border-radius: 4px 4px 0 0; }
.hist em { font-style: normal; color: #bcc7ee; }
.lab-view { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; align-items: start; }
@media (max-width: 960px) { .lab-view { grid-template-columns: 1fr; } }

/* ------------------------------------------------ India map */
.map-tools { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px; align-items: center; }
.map-tools input { padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; min-width: 240px; flex: 0 1 320px; }
.map-wrap { position: relative; margin-bottom: 8px; }
.map-info[hidden] { display: none; }
.map-info { position: absolute; right: 12px; top: 54px; z-index: 4; width: 240px; display: flex; flex-direction: column; gap: 8px; }
.region-card[hidden] { display: none; }
#india3d:not(.viz-tall):not(.india-map) { height: 300px; margin-bottom: 16px; }

/* ------------------------------------------------ quiz */
.quiz { min-height: 300px; }
.quiz-head { display: flex; justify-content: space-between; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 10px; }
.quiz-timer { font: 800 1.3rem var(--display); background: var(--surface-2); padding: 4px 14px; border-radius: 10px; }
.quiz-timer.low { background: var(--bad); color: #fff; }
.palette { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.pal { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--text); cursor: pointer; font-weight: 700; }
.pal.ans { background: rgba(10, 75, 175, .18); }
.pal.mark { box-shadow: inset 0 -4px 0 var(--saffron); }
.pal.cur { outline: 2px solid var(--blue); }
.pal.right { background: rgba(31, 157, 85, .25); }
.pal.wrong { background: rgba(214, 69, 69, .25); }
.qstem { font: 600 1.2rem/1.5 var(--font); }
.opts { display: grid; gap: 10px; margin: 16px 0; }
.opt { display: flex; gap: 12px; align-items: center; text-align: left; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--line); background: var(--surface); color: var(--text); font: inherit; cursor: pointer; }
.opt span { flex: none; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-2); font-weight: 800; }
.opt:hover:not(:disabled) { border-color: var(--blue); }
.opt.sel { border-color: var(--blue); background: rgba(10, 75, 175, .08); }
.opt.right { border-color: var(--ok); background: rgba(31, 157, 85, .1); }
.opt.wrong { border-color: var(--bad); background: rgba(214, 69, 69, .1); }
.explain { border-radius: 12px; padding: 12px 14px; margin-bottom: 14px; }
.explain.ok { background: rgba(31, 157, 85, .1); }
.explain.bad { background: rgba(214, 69, 69, .1); }
.explain p { margin: 4px 0 0; }
.qnav { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.result .stats { margin-top: 12px; }
.topicbars { display: grid; gap: 8px; margin-bottom: 16px; }
.tbar { display: grid; grid-template-columns: minmax(0, 1fr) 140px 50px; gap: 10px; align-items: center; font-size: .9rem; }
.meter { display: inline-block; height: 10px; width: 100%; min-width: 60px; border-radius: 99px; background: var(--surface-2); overflow: hidden; vertical-align: middle; }
.meter span { display: block; height: 100%; background: var(--ok); }
.meter span.bad { background: var(--bad); }
.review { padding-left: 1.2em; display: grid; gap: 10px; }
.review li { padding: 10px 12px; border-radius: 10px; background: var(--surface-2); }
.review li.ok { border-left: 4px solid var(--ok); }
.review li.bad { border-left: 4px solid var(--bad); }
.review li.skip { border-left: 4px solid var(--muted); }
.review p { margin: 0 0 4px; }

/* ------------------------------------------------ exams, planner, search */
.section-list { display: grid; gap: 10px; }
.section-row { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 12px; border-radius: 12px; background: var(--surface-2); }
.topic-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.track-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.track-head .group-title, .track-head h1 { margin-right: auto; }
.cta { border: 2px solid var(--saffron); }
.planner-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 14px; align-items: end; }
.levels { grid-column: 1 / -1; border: 1px dashed var(--line); border-radius: 12px; display: flex; flex-wrap: wrap; gap: 12px; }
.levels:not(:has(label)) { display: none; }
.levels label { flex: 1 1 180px; }
.plan-table td { vertical-align: top; }
.plan-table .mockday { background: rgba(255, 138, 0, .1); }
.results { list-style: none; padding: 0; display: grid; gap: 10px; }
.results .card { padding: 0; margin: 0; }
.results a { display: flex; gap: 12px; align-items: center; padding: 14px 16px; text-decoration: none; color: var(--text); }
.results a > span:nth-child(2) { flex: 1; display: flex; flex-direction: column; }
.r-icon { font-size: 1.6rem; }

/* ------------------------------------------------ forms, tables, alerts */
.form label, .admin-form label { display: flex; flex-direction: column; gap: 4px; font-weight: 600; font-size: .92rem; margin-bottom: 12px; }
.form input, .form select, .form textarea, .admin-form input, .admin-form select, .admin-form textarea, .filters input, .filters select {
  padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: 400 1rem var(--font); width: 100%;
}
.admin-form textarea { line-height: 1.6; }
label.check { flex-direction: row; align-items: center; gap: 8px; font-weight: 500; }
label.check input { width: auto; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); gap: 0 16px; }
.span-all { grid-column: 1 / -1; }
.form-actions { display: flex; gap: 10px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filters input, .filters select { width: auto; flex: 1 1 160px; }
.inline { display: inline; }
.alert { padding: 12px 16px; border-radius: 12px; margin-bottom: 16px; border: 1px solid; }
.alert ul { margin: 6px 0 0; }
.alert-ok { background: rgba(31, 157, 85, .1); border-color: rgba(31, 157, 85, .35); }
.alert-err { background: rgba(214, 69, 69, .1); border-color: rgba(214, 69, 69, .35); }
.alert-info { background: rgba(10, 75, 175, .08); border-color: rgba(10, 75, 175, .3); }
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th, .table td { padding: 9px 10px; border-bottom: 1px solid var(--line); text-align: left; }
.table th { color: var(--muted); font-weight: 700; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; }
.langdots { white-space: nowrap; }
.dot { display: inline-block; font-size: .68rem; padding: 1px 5px; border-radius: 6px; margin-right: 2px; font-weight: 700; }
.dot.ok { background: rgba(31, 157, 85, .18); color: var(--ok); }
.dot.draft { background: rgba(199, 119, 0, .18); color: var(--warn); }
.dot.none { background: var(--surface-2); color: var(--muted); opacity: .6; }
.tabs { display: flex; flex-wrap: wrap; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.tab { padding: 8px 12px; border: 0; background: none; border-bottom: 3px solid transparent; cursor: pointer; font: 600 .92rem var(--font); color: var(--muted); text-decoration: none; }
.tab.on { color: var(--text); border-color: var(--saffron); }
.admin-bar { background: var(--navy-2); }
.admin-bar-in { display: flex; flex-wrap: wrap; gap: 2px; padding-top: 6px; padding-bottom: 6px; }
.admin-bar a { color: #cfd9ff; text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: .88rem; }
.admin-bar a.on, .admin-bar a:hover { background: rgba(255, 255, 255, .12); color: #fff; }

/* ------------------------------------------------ footer */
.foot { background: var(--navy); color: #c9d4f5; margin-top: 40px; padding: 30px 0; }
.foot-in { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; }
.foot-logo { display: block; height: 50px; width: auto; margin-bottom: 10px; }
.foot a { color: #e2e9ff; }
.foot .muted { color: #93a2cf; }
.foot-links { display: flex; flex-direction: column; gap: 6px; }
.switch { display: flex; align-items: center; gap: 8px; cursor: pointer; }
@media (max-width: 760px) { .foot-in { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
@media print {
  .topbar, .foot, .lesson-actions, .viz, .lesson-side, .crumbs, .guide { display: none !important; }
  body { background: #fff; color: #000; }
  .card { box-shadow: none; border-color: #ccc; }
  .lesson-grid { display: block; }
}

/* =============================================== v1.1: accounts, premium, banners, admin */
:root { --gold: #FFC842; --gold-2: #ff8a00; --premium-grad: linear-gradient(135deg, #ffcf4a, #ff8a00); }
.hp { position: absolute !important; inset-inline-start: 0; top: 0; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.center { text-align: center; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px) { .two-col { grid-template-columns: 1fr; } }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.foot-in { grid-template-columns: 2fr 1fr 1fr 1fr; }
@media (max-width: 900px) { .foot-in { grid-template-columns: 1fr 1fr; } }

/* badges */
.badge-premium { background: var(--premium-grad); color: #3b2300; }
.badge-member { background: rgba(10, 75, 175, .14); color: var(--blue); }
.badge-bad { background: rgba(214, 69, 69, .15); color: var(--bad); }
.pill-gold { background: var(--premium-grad) !important; color: #3b2300 !important; border: 0 !important; font-weight: 700; }
.dot-warn { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--gold-2); }

/* header user menu */
.usermenu { position: relative; }
.usermenu summary { list-style: none; cursor: pointer; }
.usermenu summary::-webkit-details-marker { display: none; }
.avatar-sm { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: var(--saffron); color: #fff; font-weight: 800; font-size: .8rem; }
.usermenu-pop { position: absolute; right: 0; top: calc(100% + 8px); min-width: 210px; background: #fff; border: 1px solid #dfe6f3; border-radius: 12px; padding: 6px; box-shadow: 0 16px 40px rgba(10, 40, 100, .18); z-index: 60; }
.usermenu-pop a { display: block; padding: 9px 12px; border-radius: 8px; color: #1d2b4f !important; text-decoration: none; font-size: .92rem; }
.usermenu-pop a:hover { background: var(--pale); }

/* auth pages */
.auth-wrap { max-width: 1040px; margin: 32px auto; display: grid; grid-template-columns: 1fr 1.1fr; border-radius: 22px; overflow: hidden; box-shadow: var(--shadow); background: var(--surface); border: 1px solid var(--line); }
.auth-art { position: relative; background: radial-gradient(600px 400px at 20% 10%, #2e57d6, #0b1530 70%); color: #eef2ff; padding: 40px 34px; overflow: hidden; }
.auth-art-in { position: relative; z-index: 1; }
.auth-logo { display: block; width: 200px; max-width: 100%; height: auto; }
.auth-art h2 { color: #fff; font-size: 1.7rem; margin-top: 10px; }
.auth-art ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; font-size: 1.02rem; }
.auth-orbs span { position: absolute; border-radius: 50%; opacity: .55; }
.auth-orbs span:nth-child(1) { width: 220px; height: 220px; right: -60px; bottom: -60px; background: radial-gradient(circle, #FF8A00, transparent 70%); }
.auth-orbs span:nth-child(2) { width: 140px; height: 140px; right: 60px; top: 30px; background: radial-gradient(circle, #33cc66, transparent 70%); }
.auth-orbs span:nth-child(3) { width: 90px; height: 90px; left: 30px; bottom: 40px; background: radial-gradient(circle, #9db7ff, transparent 70%); }
.auth-card { padding: 38px 36px; }
.auth-card h1 { font-size: 1.8rem; margin-bottom: 4px; }
.auth-form { margin-top: 18px; }
@media (max-width: 1080px) { .auth-wrap { margin: 24px 16px; } }
@media (max-width: 820px) { .auth-wrap { grid-template-columns: 1fr; margin: 0; border-radius: 0; border: 0; } .auth-art { display: none; } .auth-card { padding: 26px 16px; } }
.pw-wrap { position: relative; display: block; }
.pw-wrap input { padding-right: 44px; }
.pw-toggle { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); border: 0; background: none; cursor: pointer; font-size: 1.1rem; opacity: .7; }
.pw-meter { display: block; height: 5px; border-radius: 9px; background: var(--surface-2); overflow: hidden; margin-top: 6px; }
.pw-meter span { display: block; height: 100%; width: 0; background: var(--bad); transition: width .2s, background .2s; }
.otp { font: 800 1.8rem/1 var(--display) !important; letter-spacing: .45em; text-align: center; }

/* locked content */
.teaser { position: relative; max-height: 190px; overflow: hidden; }
.teaser::after { content: ""; position: absolute; inset: 40% 0 0; background: linear-gradient(transparent, var(--bg)); }
.lock-card { position: relative; overflow: hidden; text-align: center; padding: 34px 24px; border-radius: 20px; margin: 10px 0 24px; color: #eef2ff; background: radial-gradient(700px 300px at 50% 0%, #2a4bb8, #0b1530 75%); border: 1px solid rgba(255, 255, 255, .1); box-shadow: 0 20px 50px rgba(11, 21, 48, .35); }
.lock-card h2 { color: #fff; position: relative; }
.lock-glow { position: absolute; width: 260px; height: 260px; left: 50%; top: -120px; transform: translateX(-50%); background: radial-gradient(circle, rgba(255, 170, 60, .55), transparent 65%); }
.lock-icon { position: relative; font-size: 3rem; margin-bottom: 6px; }
.lock-card p { position: relative; color: #c9d4f5; max-width: 520px; margin-left: auto; margin-right: auto; }
.lock-price { font: 800 1.2rem var(--display); color: #ffd36b !important; }
.lock-actions { position: relative; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.lock-card .btn:not(.btn-glow) { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .25); }
.perks { list-style: none; padding: 0; margin: 12px auto; display: grid; gap: 6px; max-width: 420px; text-align: left; position: relative; }

/* pricing */
.pricing-head { text-align: center; max-width: 720px; margin: 10px auto 24px; }
.pricing-head .lead { margin: 0 auto; }
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 18px; align-items: stretch; margin: 26px 0; }
.plan { position: relative; display: flex; flex-direction: column; gap: 6px; padding: 24px 20px; border-radius: 18px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); transition: transform .15s; }
.plan:hover { transform: translateY(-4px); }
.plan h3 { margin: 0; }
.plan .perks { margin: 8px 0 16px; flex: 1; font-size: .92rem; }
.plan-hot { border: 2px solid var(--gold-2); box-shadow: 0 16px 40px rgba(255, 138, 0, .18); }
.plan-sel { outline: 3px solid var(--blue); }
.plan-ribbon { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--premium-grad); color: #3b2300; font-weight: 800; font-size: .75rem; padding: 4px 12px; border-radius: 999px; white-space: nowrap; }
.plan-price, .price-big { font: 800 1.7rem var(--display); color: var(--blue); margin: 0; }
.checkout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 24px; border: 2px solid var(--blue); }
@media (max-width: 820px) { .checkout { grid-template-columns: 1fr; } }
.steps { padding-left: 1.2em; display: grid; gap: 14px; }
.pay-options { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; align-items: flex-start; }
.free-tier { text-align: center; }

/* account */
.account-hero { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; background: radial-gradient(600px 200px at 0 0, rgba(10, 75, 175, .14), transparent), var(--surface); }
.avatar { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; font: 800 1.8rem var(--display); color: #fff; background: linear-gradient(135deg, var(--saffron), #ff5f6d); flex: none; }
.account-id { flex: 1; min-width: 220px; }
.account-id h1 { margin: 0; font-size: 1.6rem; }
.account-id p { margin: 4px 0 0; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.account-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.tabs-page { margin: 6px 0 18px; }
.upsell { border: 2px dashed var(--gold-2); }
.danger-zone { border-color: rgba(214, 69, 69, .35); }
.plan-row { display: flex; justify-content: space-between; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }

/* banners / affiliate */
.ad { position: relative; margin: 14px 0; }
.ad-tag { display: inline-block; font-size: .68rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.ad-card { display: flex; flex-direction: column; gap: 4px; padding: 16px 18px; border-radius: 14px; text-decoration: none; color: var(--text); background: linear-gradient(135deg, rgba(255, 138, 0, .14), rgba(10, 75, 175, .12)), var(--surface); border: 1px solid var(--line); transition: transform .15s, box-shadow .15s; }
.ad-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.ad-card strong { font: 700 1.05rem var(--display); }
.ad-card span { color: var(--muted); font-size: .9rem; }
.ad-card em { font-style: normal; font-weight: 700; color: var(--blue); }
.ad-house .ad-card { background: var(--premium-grad); color: #3b2300; border: 0; }
.ad-house .ad-card span, .ad-house .ad-card em { color: #3b2300; }
.ad-image img { display: block; width: 100%; border-radius: 12px; }
.ad-top .ad-card, .ad-footer .ad-card { flex-direction: row; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.banner-preview { max-width: 520px; }

/* admin shell */
.admin-shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); min-height: 70vh; }
.admin-side { background: var(--navy-2); color: #cfd9ff; }
.admin-side-in { position: sticky; top: 64px; padding: 14px 10px 30px; max-height: calc(100vh - 64px); overflow: auto; }
.admin-group { text-transform: uppercase; letter-spacing: .1em; font-size: .68rem; color: #8ea0d6; margin: 14px 10px 6px; }
.admin-side a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 9px; color: #dfe6ff; text-decoration: none; font-size: .92rem; }
.admin-side a:hover, .admin-side a.on { background: rgba(255, 255, 255, .1); color: #fff; }
.admin-side a.on { box-shadow: inset 3px 0 0 var(--saffron); }
.admin-side .count { margin-left: auto; background: var(--saffron); color: #fff; border-radius: 99px; padding: 0 7px; font-size: .75rem; }
.admin-back { margin-top: 18px; opacity: .8; }
.admin-main { padding: 24px 22px 40px; min-width: 0; }
@media (max-width: 900px) {
  .admin-shell { grid-template-columns: 1fr; }
  .admin-side-in { position: static; max-height: none; display: flex; flex-wrap: wrap; gap: 4px; padding: 10px; }
  .admin-group { display: none; }
  .admin-main { padding: 16px; }
}
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; margin-bottom: 18px; }
.kpi { display: flex; flex-direction: column; gap: 2px; padding: 16px 18px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow); text-decoration: none; color: var(--text); }
.kpi span { color: var(--muted); font-size: .85rem; font-weight: 600; }
.kpi strong { font: 800 1.9rem var(--display); }
.kpi em { font-style: normal; color: var(--muted); font-size: .8rem; }
.kpi-gold { background: var(--premium-grad); color: #3b2300; border: 0; }
.kpi-gold span, .kpi-gold em { color: #4d3200; }
.spark { display: grid; grid-template-columns: repeat(14, 1fr); gap: 6px; height: 150px; align-items: end; }
.spark div { display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; font-size: .7rem; }
.spark span { width: 100%; background: linear-gradient(var(--blue), #7b5cff); border-radius: 5px 5px 0 0; }
.spark i { font-style: normal; color: var(--muted); }
.row-menu { position: relative; }
.row-menu summary { list-style: none; }
.row-menu summary::-webkit-details-marker { display: none; }
.row-menu-pop { position: absolute; right: 0; top: calc(100% + 6px); width: 300px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 16px 40px rgba(0, 0, 0, .18); padding: 8px; z-index: 20; }
.row-menu-pop button:not(.btn) { display: block; width: 100%; text-align: left; padding: 8px 10px; border: 0; background: none; border-radius: 8px; cursor: pointer; font: inherit; color: var(--text); }
.row-menu-pop button:not(.btn):hover { background: var(--surface-2); }
.row-menu-pop .danger { color: var(--bad) !important; }
.row-menu-pop .grant { border-top: 1px solid var(--line); margin-top: 6px; padding-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: .85rem; }
.row-menu-pop .grant select, .row-menu-pop .grant input { padding: 5px 6px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); color: var(--text); width: 70px; }
.row-menu-pop .grant select { width: 100%; }
.actions-inline { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.actions-inline input { padding: 5px 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--text); }
.form-inline { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.form-inline h2 { flex-basis: 100%; margin: 0; }
.form-inline input { padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); min-width: 240px; }
.checklist { list-style: none; padding: 0; display: grid; gap: 8px; }
dialog.modal { border: 0; border-radius: 18px; padding: 24px; width: min(480px, 92vw); background: var(--surface); color: var(--text); box-shadow: 0 30px 80px rgba(0, 0, 0, .35); }
dialog.modal::backdrop { background: rgba(8, 16, 40, .55); backdrop-filter: blur(3px); }
.users-table td { vertical-align: middle; }

/* =============================================== v1.2: take-apart 3D models, subject guide, streams, demo logins */
.viz-ui { max-height: 46%; overflow-y: auto; }
.viz-ui .btn.on { background: var(--saffron); color: #fff; border-color: var(--saffron); }
.vchips { display: flex; flex-wrap: wrap; gap: 6px; flex-basis: 100%; }
.vchip { padding: 4px 10px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .06); color: #dfe6ff; font: 600 .78rem var(--font); cursor: pointer; }
.vchip.on { background: #3f6fff; border-color: #3f6fff; color: #fff; }
.vparts { flex-basis: 100%; color: #dfe6ff; font-size: .85rem; }
.vparts summary { cursor: pointer; font-weight: 700; }
.vparts > div { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.part-label { font-size: 11px; background: rgba(255, 138, 0, .92); }
.vinfo-actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.vinfo-actions .btn, .vquiz .btn { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .25); }
.vquiz { display: flex; flex-direction: column; gap: 6px; margin: 8px 0; }
.viz-info { max-height: 60%; overflow-y: auto; }
.viz-info .btn-primary { background: var(--blue); }
@media (max-width: 640px) { .viz-info { max-width: calc(100% - 20px); } }

.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 16px; margin-bottom: 10px; }
.guide-grid .card { margin: 0; }
.guide-card h2 { font-size: 1.15rem; }
.subject-guide summary { cursor: pointer; font-weight: 700; }
.subject-guide p { margin: 10px 0 0; }
.clamp3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; color: var(--muted); }
.streams { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: 16px; }
.streams .card { margin: 0; scroll-margin-top: 80px; }
.stream h3 { font-size: .95rem; color: var(--muted); margin-top: 12px; }
.demo-logins { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 12px 14px; border-radius: 12px; background: rgba(10, 75, 175, .08); border: 1px dashed rgba(10, 75, 175, .4); margin-bottom: 14px; }
.demo-logins strong { flex-basis: 100%; }
.demo-box table code { font-size: .85rem; }

/* v1.2: controls sit under the 3D view instead of covering it */
.viz-live { display: flex; flex-direction: column; height: auto; min-height: 0; }
.viz-live .viz-canvas { position: relative; inset: auto; height: 400px; flex: none; }
.viz-tall.viz-live .viz-canvas { height: 560px; }
.viz-live .viz-ui { position: static; max-height: none; overflow: visible; border-radius: 0; border-width: 1px 0 0; margin: 0; }
.viz-live .viz-info { top: 54px; }
@media (max-width: 640px) { .viz-live .viz-canvas { height: 340px; } .viz-tall.viz-live .viz-canvas { height: 420px; } }
#india3d:not(.viz-tall):not(.india-map) .viz-canvas { height: 300px; }

/* =============================================== v1.3: poster-style 3D lab, answers, diagrams */
.lab-hero { position: relative; color: #fff; background-color: #081030; background-size: cover; background-position: center right; padding: 56px 0 34px; }
.lab-hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); text-shadow: 0 4px 24px rgba(0, 0, 0, .5); }
.lab-hero .lead { color: #d8e1ff; max-width: 560px; }
.lab-hero .eyebrow { color: #ffcf4a; }
.lab-tools { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 18px 0 12px; }
.lab-tools input { flex: 0 1 380px; min-width: 220px; padding: 11px 16px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, .35); background: rgba(8, 16, 48, .55); color: #fff; font: inherit; backdrop-filter: blur(6px); }
.lab-tools input::placeholder { color: #c3cdf0; }
.lab-hero .pill { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .28); color: #fff; backdrop-filter: blur(6px); }
.lab-hero .pill.on { background: linear-gradient(135deg, #FF8A00, #ff6a00); border-color: transparent; }
.lab-panel { margin: 0 0 26px; padding: 18px; border-radius: 22px; background: linear-gradient(135deg, var(--g1), var(--g2)); box-shadow: 0 18px 40px rgba(10, 20, 60, .18); scroll-margin-top: 80px; }
.lab-panel-title { color: #fff; margin: 0 0 14px; display: flex; gap: 10px; align-items: center; text-shadow: 0 2px 8px rgba(0, 0, 0, .25); }
.lab-panel-title span { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; background: rgba(255, 255, 255, .22); }
.lab-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.lab-card { display: flex; flex-direction: column; border-radius: 16px; overflow: hidden; text-decoration: none; color: #17203a; background: #fff; box-shadow: 0 6px 18px rgba(0, 0, 0, .15); transition: transform .2s, box-shadow .2s; }
.lab-card:hover, .lab-card:focus-visible { transform: translateY(-5px) scale(1.015); box-shadow: 0 18px 36px rgba(0, 0, 0, .28); }
.lab-thumb { position: relative; display: block; aspect-ratio: 11 / 12; overflow: hidden; background: radial-gradient(circle at 50% 40%, #fff, #e8eefc); }
.lab-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.lab-card:hover .lab-thumb img { transform: scale(1.07); }
.lab-emoji { display: grid; place-items: center; height: 100%; font-size: 4rem; }
.lab-card-body { display: flex; flex-direction: column; gap: 3px; padding: 10px 12px 12px; flex: 1; }
.lab-card-body strong { font-family: var(--display); font-size: 1.05rem; line-height: 1.2; }
.lab-card-body .small { color: #5d6886; line-height: 1.35; }
.lab-card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 6px; }
.lab-card-meta .badge { background: #eef2fa; color: #3b4770; }
.lab-card .go { font-weight: 800; font-size: .85rem; color: var(--g1); }
.lab-detail-head { display: flex; gap: 18px; align-items: center; padding: 18px; margin-bottom: 16px; border-radius: 20px; color: #fff; background: linear-gradient(135deg, var(--g1), var(--g2)); }
.lab-detail-head .lead, .lab-detail-head .eyebrow { color: rgba(255, 255, 255, .88); margin: 0; }
.lab-detail-head h1 { margin: 2px 0 4px; }
.lab-detail-thumb { width: 96px; height: 130px; object-fit: cover; border-radius: 14px; background: #fff; box-shadow: 0 8px 20px rgba(0, 0, 0, .25); flex: none; }
.lab-main { min-width: 0; }
.lab-main > .viz { box-shadow: 0 20px 50px rgba(0, 0, 0, .35); }
.lab-side .card h2 { font-size: 1.15rem; }
@media (max-width: 560px) { .lab-detail-head { flex-direction: column; align-items: flex-start; } .lab-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } .lab-card-body .small { display: none; } }

.qa-card { margin-top: 16px; }
.qa-objective { padding: 10px 14px; border-radius: 12px; background: var(--surface-2); }
.qa-list { display: flex; flex-direction: column; gap: 8px; }
details.qa { border: 1px solid var(--line); border-radius: 12px; background: var(--surface); overflow: hidden; }
details.qa summary { display: flex; gap: 10px; align-items: center; padding: 11px 14px; cursor: pointer; font-weight: 700; list-style: none; }
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::after { content: "+"; margin-left: auto; font-size: 1.2rem; color: var(--muted); }
details.qa[open] summary::after { content: "−"; }
details.qa[open] summary { background: var(--surface-2); }
details.qa p { margin: 0; padding: 12px 14px 14px 52px; }
.qa-n { display: inline-grid; place-items: center; flex: none; width: 28px; height: 28px; border-radius: 50%; color: #fff; font-size: .85rem; background: linear-gradient(135deg, var(--saffron), #ff6a00); }
figure.diagram { margin: 0 0 18px; padding: 14px; border-radius: 16px; border: 1px solid var(--line); background: linear-gradient(180deg, var(--surface-2), var(--surface)); text-align: center; }
figure.diagram figcaption { font-weight: 700; text-align: left; margin-bottom: 8px; }
svg.dg { display: block; width: 100%; max-width: 560px; height: auto; margin: 0 auto 10px; color: var(--text); }
svg.dg text:not([fill]) { paint-order: stroke; stroke: var(--surface); stroke-width: 3px; stroke-linejoin: round; }
.qdiagram svg.dg { max-width: 420px; margin: 10px 0; }
@media print {
  .lab-hero, .lab-side, .print-diagram, .lab-filters { display: none !important; }
  .lab-view { display: block; }
  details.qa { break-inside: avoid; }
  details.qa > *:not(summary) { display: block !important; }
  svg.dg text:not([fill]) { stroke: #fff; }
}
.lab-card[hidden], .lab-panel[hidden] { display: none; }
details.qdiagram summary { cursor: pointer; font-weight: 700; margin-top: 4px; }
.lab-card strong { color: #17203a; }

/* v1.3: mathematics gallery */
.math-cards { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.math-cards .lab-thumb { aspect-ratio: 148 / 165; background: #f4f6ff; }
.math-cards .lab-thumb img { object-fit: contain; }
.math-n { position: absolute; top: 6px; left: 6px; min-width: 26px; height: 26px; padding: 0 6px; border-radius: 13px; display: grid; place-items: center; font-style: normal; font-weight: 800; font-size: .8rem; color: #fff; background: var(--g1); }
/* π Mathematics 500: symbol cards for catalog concepts, "coming soon" tiles, practice levels */
.math-glyph { position: absolute; inset: 0; display: grid; place-items: center; padding: 14px; background: radial-gradient(circle at 30% 25%, #fff 0, color-mix(in srgb, var(--g1) 18%, #fff) 55%, color-mix(in srgb, var(--g1) 38%, #fff) 100%); }
.math-glyph b { font-family: var(--display); font-size: clamp(1.1rem, 4.2vw, 1.75rem); line-height: 1.15; text-align: center; color: color-mix(in srgb, var(--g1) 75%, #0b1440); overflow-wrap: anywhere; text-shadow: 0 2px 0 rgba(255, 255, 255, .8); }
.lab-detail-thumb .math-glyph, .viz-poster .math-glyph { position: relative; inset: auto; width: 96px; height: 130px; border-radius: 14px; }
.viz-poster .math-glyph { width: 148px; height: 165px; }
.lab-detail-thumb:has(.math-glyph) { display: block; width: 96px; height: 130px; }
.lab-card.soon { align-self: start; background: rgba(255, 255, 255, .7); box-shadow: none; border: 1.5px dashed color-mix(in srgb, var(--g1) 45%, #c9cfe0); }
.lab-card.soon:hover { transform: none; box-shadow: none; }
.lab-card.soon strong { font-size: .95rem; color: #3b4770; }
.lab-card.soon .badge { align-self: flex-start; margin-top: auto; background: #f1f3f9; color: #6a7392; }
.math-id { font-style: normal; font-weight: 800; font-size: .72rem; letter-spacing: .04em; color: var(--g1); }
.math-done { font-size: .8rem; font-weight: 600; opacity: .8; margin-left: 6px; }
.math-practice .qa-n { width: auto; padding: 0 9px; border-radius: 12px; font-size: .75rem; }
@media (max-width: 560px) { .math-cat-pills { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; } .math-cat-pills .pill { flex: none; } }
.math-practice .lvl-0 { background: #34c759; } .math-practice .lvl-1 { background: #ff9f1a; } .math-practice .lvl-2 { background: #e5394a; }
.dot-c { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.math-cards-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.math-box { padding: 12px 14px; border-radius: 12px; background: var(--surface-2); }
.math-box h2 { font-size: 1.05rem; }
.math-box p { margin: 0; }
.formula { font: 600 1.02rem/1.6 "Cambria Math", "STIX Two Math", var(--font); }
.math-live { display: flex; flex-direction: column; gap: 6px; }
.math-live span, .math-readout span { display: flex; justify-content: space-between; gap: 10px; padding: 6px 10px; border-radius: 9px; background: var(--surface-2); }
.math-live em, .math-readout em { font-style: normal; color: var(--muted); }
.math-readout { flex-basis: 100%; display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 6px; font-size: .85rem; }
.math-readout span { background: rgba(255, 255, 255, .1); }
.math-readout em { color: #c3cdf0; }
.mlabel { font-size: 12px; }
.mlabel.strong { background: rgba(31, 42, 122, .9); font-size: 13px; }
.mlabel.tick { background: transparent; color: #1f2a7a; font-size: 10px; padding: 0; }
.viz-poster img { border-radius: 12px; background: #fff; box-shadow: 0 8px 20px rgba(0, 0, 0, .25); }
.truth table { max-width: 360px; text-align: center; }
.truth select { margin-left: 8px; padding: 6px 10px; border-radius: 8px; }
.tt-t { color: #1f9d55; font-weight: 800; }
.tt-f { color: #d64545; font-weight: 800; }
.math-nav { justify-content: space-between; margin-top: 10px; }
.opt.right { border-color: #1f9d55 !important; background: rgba(31, 157, 85, .12); }
.opt.wrong { border-color: #d64545 !important; background: rgba(214, 69, 69, .12); }
.lab-hero .math-link { background: linear-gradient(135deg, #8a5cf0, #3f6fd8); border-color: transparent; }

/* v1.3: Explore India (poster layout) */
.india-hero { background: radial-gradient(circle at 20% 20%, #1c4e9e, #0b1530 70%); color: #fff; padding: 18px 0 26px; }
.india-top { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(260px, 1fr); gap: 18px; align-items: start; }
@media (max-width: 960px) { .india-top { grid-template-columns: 1fr; } }
.india-title { font-size: clamp(2.2rem, 5vw, 3.6rem); margin: 0 0 6px; }
.india-title span { background: linear-gradient(90deg, #FF8A00 0%, #ffffff 50%, #138808 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.india-title small { display: block; font-size: 1rem; color: #cfe0ff; letter-spacing: .08em; }
.india-map { height: 640px; border-radius: 20px; box-shadow: 0 24px 60px rgba(0, 0, 0, .45); }
@media (max-width: 640px) { .india-map { height: 460px; } }
.map-wrap { position: relative; }
.map-info { position: absolute; left: 12px; bottom: 12px; z-index: 4; display: flex; gap: 12px; align-items: center; max-width: 380px; padding: 10px; }
.map-info img { width: 110px; height: 84px; object-fit: cover; border-radius: 10px; }
.map-info div { display: flex; flex-direction: column; gap: 4px; }
.sea-label { background: transparent; color: #d9f0ff; font-style: italic; font-size: 13px; text-shadow: 0 1px 3px rgba(0, 0, 0, .6); }
.map-compass { position: absolute; top: 56px; right: 14px; z-index: 3; width: 54px; height: 54px; border-radius: 50%; border: 2px solid rgba(255, 255, 255, .7); background: radial-gradient(circle, rgba(255, 255, 255, .25), rgba(8, 16, 48, .4)); pointer-events: none; }
.map-compass::after { content: ""; position: absolute; left: 50%; top: 8px; transform: translateX(-50%); border: 8px solid transparent; border-bottom: 22px solid #ff5a36; border-top: 0; }
.map-compass span { position: absolute; top: -22px; left: 50%; transform: translateX(-50%); font-weight: 800; color: #fff; }
.zone-stack { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.zone-card { position: relative; min-height: 104px; border: 0; border-radius: 16px; cursor: pointer; background-size: cover; background-position: center; box-shadow: 0 8px 22px rgba(0, 0, 0, .35); text-align: left; transition: transform .15s; outline: 3px solid transparent; }
.zone-card:hover, .zone-card.on { transform: translateY(-3px); outline-color: #ffcf4a; }
.zone-card:first-child { grid-column: 1 / -1; min-height: 140px; }
.zone-name { position: absolute; left: 10px; bottom: 10px; padding: 4px 12px; border-radius: 999px; background: var(--zc); color: #fff; font: 800 1rem var(--display); box-shadow: 0 2px 8px rgba(0, 0, 0, .3); }
.zone-count { position: absolute; right: 10px; top: 10px; min-width: 28px; height: 28px; border-radius: 14px; display: grid; place-items: center; background: rgba(255, 255, 255, .9); color: #0b1530; font-weight: 800; }
.topic-strip { margin: 6px 0 24px; padding: 16px; border-radius: 18px; background: linear-gradient(135deg, #1e4fae, #2f7fe0); color: #fff; }
.topic-strip .muted { color: #d6e4ff; }
.topic-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); gap: 10px; }
.topic-tile { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 6px; border-radius: 14px; border: 2px solid transparent; background: #eef6ff; color: #17203a; cursor: pointer; font: 700 .8rem var(--font); transition: transform .15s; }
.topic-tile img { width: 100%; height: 56px; object-fit: contain; }
.topic-tile:hover { transform: translateY(-3px); }
.topic-tile.on { border-color: #ffcf4a; box-shadow: 0 0 0 3px rgba(255, 207, 74, .5); }
.zone-panel { margin-bottom: 22px; border-radius: 20px; overflow: hidden; background: color-mix(in srgb, var(--zc) 10%, var(--surface)); border: 1px solid var(--line); }
.zone-panel[hidden] { display: none; }
.zone-banner { height: 140px; background-size: cover; background-position: center; display: flex; align-items: flex-start; padding: 12px; }
.zone-banner h2 { margin: 0; padding: 4px 16px; border-radius: 999px; background: var(--zc); color: #fff; box-shadow: 0 4px 12px rgba(0, 0, 0, .3); }
.state-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; padding: 14px; }
.state-card { display: flex; flex-direction: column; gap: 2px; padding: 8px; border-radius: 14px; background: #fff; color: #17203a; text-decoration: none; box-shadow: 0 4px 14px rgba(0, 0, 0, .12); transition: transform .15s, box-shadow .15s; }
.state-card img { width: 100%; aspect-ratio: 6 / 5; object-fit: cover; border-radius: 10px; margin-bottom: 4px; }
.state-card .muted { color: #5d6886; }
.state-card:hover { transform: translateY(-4px); box-shadow: 0 12px 26px rgba(0, 0, 0, .2); }
.state-card[hidden] { display: none; }
.state-hero-img { width: 150px; height: 120px; object-fit: cover; border-radius: 16px; box-shadow: 0 8px 20px rgba(0, 0, 0, .2); }
.india-map.viz-live { height: auto; }
.india-map.viz-live .viz-canvas { height: 640px; }
@media (max-width: 640px) { .india-map.viz-live .viz-canvas { height: 460px; } }
.india-map.viz-live .viz-ui:empty, .india-map .viz-ui:not(:has(*)) { display: none; }
.state-card strong { color: #17203a; font-family: var(--display); font-size: 1.02rem; }
#india3d:not(.india-map) .map-compass { display: none; }

/* v1.3: Explore India map dashboard (Map Development Kit layout) */
.imap { display: grid; grid-template-columns: 250px minmax(0, 1fr) 330px; gap: 14px; padding: 14px; background: radial-gradient(circle at 50% 0%, #10295a, #071430 60%); color: #e8eeff; --surface: #101f44; --surface-2: #172a58; --line: #24396e; --text: #e8eeff; --muted: #a6b3d6; }
.imap a { color: #9cc3ff; }
.imap-side, .imap-panel { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.imap-side { background: rgba(10, 22, 52, .85); border: 1px solid #24396e; border-radius: 16px; padding: 14px; align-self: start; position: sticky; top: 70px; max-height: calc(100vh - 84px); overflow: auto; }
.imap-intro h1 { font-size: 1.4rem; margin: 0 0 4px; }
.imap-intro p { font-size: .86rem; color: #c3cdf0; margin: 0; }
.imap-filters, .imap-topics { display: flex; flex-direction: column; gap: 2px; border-top: 1px solid #24396e; padding-top: 10px; }
.imap-f, .imap-t { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 10px; border: 0; border-radius: 10px; background: transparent; color: #e8eeff; font: 600 .92rem var(--font); text-align: left; cursor: pointer; }
.imap-f:hover, .imap-t:hover, .imap-f:focus-visible, .imap-t:focus-visible { background: rgba(79, 140, 255, .18); outline: none; }
.imap-f.on { background: linear-gradient(90deg, #2f6fe0, #4f8cff); }
.imap-f .ico { width: 18px; text-align: center; opacity: .85; }
.imap-f .dot-c { width: 14px; height: 14px; box-shadow: 0 0 0 3px rgba(255, 255, 255, .12); }
.imap-t .badge { margin-left: auto; background: #2f6fe0; color: #fff; }
.imap-list summary { cursor: pointer; font-weight: 700; padding: 6px 2px; }
.imap-list ul { list-style: none; margin: 6px 0 0; padding: 0; max-height: 260px; overflow: auto; display: flex; flex-direction: column; gap: 2px; }
.imap-list button { width: 100%; text-align: left; padding: 6px 8px; border: 0; border-radius: 8px; background: transparent; color: #e8eeff; font: 500 .86rem var(--font); cursor: pointer; }
.imap-list button:hover, .imap-list button:focus-visible { background: rgba(79, 140, 255, .2); outline: none; }
.imap-list small { color: #93a2cf; }
.imap-saved h2 { font-size: .9rem; margin: 0 0 6px; }
.imap-main { position: relative; min-width: 0; }
.imap-search { position: relative; margin-bottom: 10px; }
.imap-search input { width: 100%; padding: 11px 16px 11px 40px; border-radius: 12px; border: 1px solid #2c4580; background: #0c1a3c url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%239cb3e6' stroke-width='2'%3E%3Ccircle cx='8' cy='8' r='6'/%3E%3Cpath d='M13 13l4 4'/%3E%3C/svg%3E") 13px center no-repeat; color: #fff; font: inherit; }
.imap-results { position: absolute; z-index: 20; left: 0; right: 0; top: calc(100% + 4px); margin: 0; padding: 6px; list-style: none; border-radius: 12px; background: #0f1f46; border: 1px solid #2c4580; box-shadow: 0 16px 40px rgba(0, 0, 0, .45); }
.imap-results li { padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.imap-results li[aria-selected="true"], .imap-results li:hover { background: #2f6fe0; }
.imap-results small { color: #b9c6ef; margin-left: 6px; }
.india-map { height: auto; border-radius: 18px; overflow: hidden; box-shadow: 0 24px 60px rgba(0, 0, 0, .45); border: 1px solid #24396e; }
.india-map:not(.viz-live) { height: 680px; }
.india-map.viz-live .viz-canvas { height: 680px; }
.india-map .viz-ui:empty { display: none; }
.imap-loading { font-weight: 700; color: #cfe0ff; }
.imap-layers { position: absolute; top: 64px; right: 12px; z-index: 5; width: 230px; padding: 12px; background: rgba(8, 18, 44, .88); border: 1px solid #2c4580; backdrop-filter: blur(6px); margin: 0; }
.imap-layers h2 { font-size: .95rem; margin: 0 0 6px; }
.imap-switch { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 4px 0; font-size: .85rem; cursor: pointer; }
.imap-switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.imap-switch i { width: 36px; height: 20px; border-radius: 10px; background: #3a4a72; position: relative; transition: background .15s; flex: none; }
.imap-switch i::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: transform .15s; }
.imap-switch input:checked + i { background: #2f80ff; }
.imap-switch input:checked + i::after { transform: translateX(16px); }
.imap-switch input:focus-visible + i { box-shadow: 0 0 0 3px #ffcf4a; }
.imap-layers .muted { margin: 6px 0 0; font-size: .72rem; }
.map-inset { position: absolute; z-index: 4; width: 120px; padding: 6px; border-radius: 12px; border: 1px dashed rgba(255, 255, 255, .5); background: rgba(8, 18, 44, .75); color: #fff; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 2px; font: 700 .72rem var(--font); }
.map-inset svg { width: 100%; height: 90px; }
.map-inset[data-inset="lakshadweep"] { left: 12px; bottom: 60px; }
.map-inset[data-inset="andaman-nicobar"] { right: 12px; bottom: 60px; }
.map-inset:hover, .map-inset:focus-visible { border-color: #ffcf4a; outline: none; }
.imap-note { font-size: .75rem; color: #93a2cf; margin: 8px 2px 0; }
.map-tip { position: absolute; z-index: 6; pointer-events: none; padding: 4px 10px; border-radius: 8px; background: rgba(8, 18, 44, .92); border: 1px solid #2c4580; font: 600 .82rem var(--font); white-space: nowrap; }
.map-label.sel { background: #ff9a00 !important; color: #1a1000; font-size: 13px; }
.nb-label { color: rgba(200, 214, 245, .7); font: 700 11px var(--font); letter-spacing: .12em; text-transform: uppercase; pointer-events: none; text-shadow: 0 1px 3px rgba(0, 0, 0, .6); }
.imap-panel .card { margin: 0; }
.imap-profile { position: relative; min-height: 220px; }
.imap-profile h2 { font-size: 1.45rem; margin: 0 0 4px; padding-right: 30px; }
.imap-profile dl { display: grid; grid-template-columns: 110px 1fr; gap: 6px 10px; margin: 10px 0; font-size: .88rem; }
.imap-profile dt { color: #a6b3d6; }
.imap-profile dd { margin: 0; font-weight: 600; }
.imap-photo { width: 100%; height: 160px; object-fit: cover; border-radius: 12px; margin: 6px 0; }
.imap-close { position: absolute; top: 10px; right: 10px; width: 30px; height: 30px; border-radius: 50%; border: 1px solid #2c4580; background: transparent; color: #fff; cursor: pointer; }
.imap-src { font-size: .8rem; padding: 6px 10px; border-radius: 8px; background: rgba(47, 157, 85, .15); }
.imap-src.pending { background: rgba(255, 179, 64, .15); color: #ffd28a; }
.imap-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.imap-actions .btn-block { flex-basis: 100%; }
.imap-empty { display: grid; place-items: center; text-align: center; gap: 6px; padding: 30px 10px; color: #a6b3d6; }
.imap-empty span { font-size: 2.2rem; }
.imap-quick h2, .imap-sources summary { font-size: 1.02rem; margin: 0 0 8px; }
.imap-quick dl { display: grid; grid-template-columns: 1fr 1.2fr; gap: 4px 10px; font-size: .86rem; margin: 0; }
.imap-quick dt { color: #a6b3d6; }
.imap-quick dd { margin: 0; font-weight: 600; }
.imap-sources summary { cursor: pointer; font-weight: 700; }
.imap-src-list p { font-size: .8rem; margin: 8px 0; }
.imap-carousel-wrap { margin-top: 18px; }
.imap-carousel { display: flex; gap: 12px; overflow-x: auto; padding: 4px 2px 12px; scroll-snap-type: x mandatory; }
.imap-card { flex: 0 0 150px; scroll-snap-align: start; border: 0; padding: 0; border-radius: 12px; overflow: hidden; background: #fff; cursor: pointer; box-shadow: 0 6px 16px rgba(0, 0, 0, .18); transition: transform .15s; }
.imap-card img { width: 150px; height: 100px; object-fit: cover; display: block; }
.imap-card span { display: block; padding: 6px; font: 700 .8rem var(--font); color: #17203a; }
.imap-card:hover, .imap-card:focus-visible { transform: translateY(-3px); outline: 3px solid #ffcf4a; }
.imap-compare { max-width: 720px; width: calc(100% - 32px); border: 1px solid var(--line); border-radius: 16px; background: var(--surface); color: var(--text); }
.imap-compare::backdrop { background: rgba(0, 0, 0, .55); }
.imap-compare form { float: right; }
@media (max-width: 1200px) { .imap { grid-template-columns: 220px minmax(0, 1fr); } .imap-panel { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); } }
@media (max-width: 820px) {
  .imap { grid-template-columns: 1fr; padding: 10px; }
  .imap-side { position: static; max-height: none; }
  .imap-filters { flex-direction: row; flex-wrap: wrap; }
  .imap-f, .imap-t { width: auto; padding: 6px 10px; font-size: .82rem; background: rgba(255, 255, 255, .06); }
  .imap-topics { flex-direction: row; flex-wrap: wrap; }
  .india-map:not(.viz-live), .india-map.viz-live .viz-canvas { height: 460px; }
  .imap-layers { position: static; width: auto; margin-top: 10px; }
  .map-inset { width: 90px; bottom: 10px !important; }
  .map-inset svg { height: 60px; }
  .imap-panel { display: flex; }
  .imap-panel .imap-profile { position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; max-height: 65vh; overflow: auto; border-radius: 18px 18px 0 0; transform: translateY(110%); transition: transform .25s; box-shadow: 0 -12px 40px rgba(0, 0, 0, .5); }
  .imap-panel.open .imap-profile { transform: none; }
}
@media (prefers-reduced-motion: reduce) { .imap-panel .imap-profile, .imap-card { transition: none; } }
.imap-main { align-self: start; }
.map-inset[data-inset] { bottom: auto; top: 606px; }
@media (max-width: 820px) { .map-inset[data-inset] { top: 432px; bottom: auto !important; } }
#india3d .map-inset[data-inset] { top: auto; bottom: 12px !important; }
.imap-layers { top: 118px; }
#india3d.india-map .map-compass { left: 14px; right: auto; top: 30px; }

/* ------------------------------------------------ v1.6 K-12 topic lessons */
.badge-info { background: rgba(10, 75, 175, .14); color: var(--blue); }
.badge-muted { background: var(--surface-2); color: var(--muted); }
.k12-head .eyebrow { margin: 0; color: var(--muted); font-size: .85rem; font-weight: 600; }
.k12-note { margin: 12px 0 18px; }
.k12-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 18px; align-items: start; }
.k12-main > .card, .k12-side > .card { margin-bottom: 16px; }
.k12-side { position: sticky; top: 80px; }
@media (max-width: 960px) { .k12-grid { grid-template-columns: 1fr; } .k12-side { position: static; } }
.k12-callout { border-radius: 12px; padding: 12px 14px; margin: 12px 0 0; }
.k12-callout p { margin: 6px 0 0; }
.k12-india { background: rgba(255, 138, 0, .1); border-inline-start: 4px solid var(--saffron); }
.k12-mistake { background: rgba(214, 69, 69, .07); border-inline-start: 4px solid var(--bad); }
.k12-wrong { color: var(--bad); }
.k12-right { color: var(--ok); font-weight: 600; }
.k12-qs { padding-inline-start: 1.3em; }
.k12-q { margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
.k12-qmeta { margin: 0 0 4px; }
.k12-qtext { font-weight: 600; margin: 0 0 8px; }
.k12-opts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-bottom: 8px; }
.k12-opt { text-align: start; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; cursor: pointer; }
.k12-opt span { display: inline-grid; place-items: center; width: 1.6em; height: 1.6em; border-radius: 50%; background: var(--surface-2); font-weight: 700; font-size: .8rem; margin-inline-end: 6px; }
.k12-opt:hover:not(:disabled) { border-color: var(--blue); }
.k12-opt.right { border-color: var(--ok); background: rgba(31, 157, 85, .12); }
.k12-opt.wrong { border-color: var(--bad); background: rgba(214, 69, 69, .1); }
.k12-ans summary { cursor: pointer; color: var(--blue); font-weight: 600; }
.k12-ans ul { margin: 6px 0 0; }
.k12-score { font-weight: 700; color: var(--ok); }
.k12-fallback { padding: 18px; border-radius: 12px; background: linear-gradient(135deg, var(--surface-2), var(--surface)); border: 1px dashed var(--line); font-size: .95rem; }
.k12-visual figure { margin: 0 0 12px; }
.k12-visual figcaption { font-size: .8rem; color: var(--muted); margin-top: 6px; }
.k12-gloss dt { font-weight: 700; margin-top: 8px; }
.k12-gloss dd { margin: 2px 0 0; color: var(--muted); }
.k12-source dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0; }
.k12-source dt { font-weight: 600; color: var(--muted); }
.k12-source dd { margin: 0; }
.k12-list { margin-top: 28px; }
.k12-embed { margin-top: 24px; }
.k12-embed > .card { margin-bottom: 16px; }
.k12-embed-head { margin-bottom: 12px; padding-inline-start: 12px; border-inline-start: 4px solid var(--saffron); }
.k12-embed-head h2 { margin: 0 0 4px; }
.k12-embed-head p { margin: 0; }
.k12-card { display: flex; flex-direction: column; gap: 6px; position: relative; padding-inline-start: 56px; }
.k12-num { position: absolute; inset-inline-start: 14px; top: 14px; width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--accent, var(--blue)); color: #fff; font-weight: 800; font-size: .85rem; }
.k12-matrix td, .k12-matrix th { text-align: center; white-space: nowrap; }
.k12-matrix .k12-full { background: rgba(31, 157, 85, .12); }
.k12-matrix .k12-part { background: rgba(199, 119, 0, .12); }
.k12-matrix .k12-none { background: rgba(214, 69, 69, .07); }
@media print { .k12-side { position: static; } .k12-ans { display: block; } .k12-ans > summary { display: none; } .k12-grid { display: block; } .pager, .k12-opts button:disabled { opacity: 1; } }

/* ---------------------------------------------------------------- Human Body 3D Explorer */
.bx-home { padding-top: 20px; }
.bx-hero { display: grid; grid-template-columns: auto 1fr auto; gap: 22px; align-items: center; padding: 22px 26px; border-radius: 22px; color: #fff;
  background: radial-gradient(900px 300px at 85% 0%, rgba(120, 190, 255, .35), transparent 60%), linear-gradient(120deg, #0b3fa8 0%, #1565d8 55%, #1e88e5 100%);
  box-shadow: 0 18px 40px rgba(13, 60, 160, .28); margin-bottom: 22px; }
.bx-hero-thumb { width: 108px; height: 144px; object-fit: cover; border-radius: 16px; background: rgba(255,255,255,.12); box-shadow: inset 0 0 0 2px rgba(255,255,255,.35); }
.bx-eyebrow-up { margin: 0; letter-spacing: .16em; font-weight: 800; font-size: .78rem; opacity: .9; }
.bx-hero h1 { margin: 2px 0 4px; color: #fff; font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.bx-sub { margin: 0 0 10px; color: #ffe27a; font-weight: 700; font-size: 1.05rem; }
.bx-checks { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 18px; font-size: .92rem; }
.bx-checks li::before { content: "\2714"; display: inline-grid; place-items: center; width: 18px; height: 18px; margin-right: 7px; border-radius: 50%; background: #22c55e; color: #fff; font-size: .7rem; }
.bx-hero-stat { background: #ffd83d; color: #10204a; border-radius: 14px; padding: 12px 16px; display: flex; flex-direction: column; gap: 2px; min-width: 190px; box-shadow: 0 8px 18px rgba(0,0,0,.2); }
.bx-hero-stat strong { font: 800 1.15rem var(--display); }
.bx-hero-stat span { font-size: .78rem; font-weight: 600; }
.bx-shell { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 16px; margin-bottom: 26px; }
.bx-layers { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; align-self: start; position: sticky; top: 76px; }
.bx-layers h2 { font-size: 1.05rem; margin: 0 0 8px; }
.bx-presets { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.bx-presets .pill { padding: 4px 10px; font-size: .8rem; }
.bx-layer { display: flex; align-items: center; gap: 7px; padding: 5px 6px; border-radius: 9px; cursor: pointer; font-size: .9rem; }
.bx-layer:hover { background: var(--surface-2); }
.bx-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--c); flex: none; }
.bx-layer-tools { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 6px; }
.bx-main { min-width: 0; }
.bx-search { position: relative; margin-bottom: 10px; }
.bx-search input { width: 100%; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.bx-results { position: absolute; z-index: 20; left: 0; right: 0; top: 100%; margin-top: 4px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); max-height: 340px; overflow: auto; padding: 4px; }
.bx-result { display: block; width: 100%; text-align: left; border: 0; background: none; color: var(--text); padding: 8px 10px; border-radius: 8px; cursor: pointer; font: inherit; }
.bx-result:hover, .bx-result:focus { background: var(--surface-2); }
.bx-stage-host { position: relative; height: 560px; border-radius: 18px; overflow: hidden; background: #0d1222; box-shadow: 0 14px 34px rgba(5, 10, 30, .35); }
.bx-stage-tall { height: min(78vh, 760px); min-height: 520px; }
.bx-canvas { position: absolute; inset: 0; }
.bx-canvas canvas { display: block; }
.bx-labels { position: absolute; inset: 0; touch-action: none; }
.bx-labels:focus-visible { outline: 3px solid #ffd83d; outline-offset: -3px; }
.bx-label { padding: 2px 8px; border-radius: 8px; background: rgba(10, 16, 34, .78); color: #fff; font: 600 .74rem/1.3 var(--font); white-space: nowrap; pointer-events: none; border: 1px solid rgba(255,255,255,.18); transform: translateY(-14px); }
.bx-toolbar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; padding: 8px 10px; margin-top: -14px; padding-top: 22px; background: #0b1020; border-radius: 0 0 18px 18px; position: relative; z-index: 0; }
.bx-stage-host { z-index: 1; }
.bx-views { display: flex; gap: 2px; background: rgba(10,16,34,.7); border-radius: 10px; padding: 2px; }
.bx-btn { border: 1px solid rgba(255,255,255,.16); background: rgba(10, 16, 34, .72); color: #fff; border-radius: 9px; padding: 6px 10px; font: 600 .8rem var(--font); cursor: pointer; }
.bx-btn:hover { background: rgba(40, 70, 160, .85); }
.bx-btn.on { background: #1e6bff; border-color: #6ea0ff; }
.bx-btn:disabled { opacity: .5; cursor: default; }
.bx-btn:focus-visible { outline: 2px solid #ffd83d; }
.bx-views .bx-btn { border: 0; background: transparent; }
.bx-views .bx-btn:hover { background: rgba(40, 70, 160, .85); }
.bx-layers .bx-btn, .bx-info .bx-btn, .bx-steps .bx-btn, .bx-quiz .bx-btn, .bx-tour .bx-btn { background: var(--surface-2); color: var(--text); border-color: var(--line); }
.bx-layers .bx-btn.on, .bx-steps .bx-btn.on { background: var(--blue); color: #fff; }
.bx-explode, .bx-cut { display: inline-flex; align-items: center; gap: 6px; background: rgba(10,16,34,.72); color: #fff; border-radius: 10px; padding: 4px 10px; font: 600 .8rem var(--font); }
.bx-explode input, .bx-cut input { width: 110px; accent-color: #ffd83d; }
.bx-cut select { background: #10204a; color: #fff; border: 1px solid rgba(255,255,255,.2); border-radius: 6px; font-size: .75rem; }
.bx-cut .bx-btn { padding: 3px 8px; }
.bx-orient { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); background: rgba(10,16,34,.72); color: #dfe8ff; font: 600 .75rem var(--font); padding: 3px 10px; border-radius: 999px; z-index: 4; pointer-events: none; white-space: nowrap; }
.bx-side { position: absolute; top: 40%; color: rgba(223, 232, 255, .75); font: 700 .72rem var(--font); letter-spacing: .04em; z-index: 4; pointer-events: none; writing-mode: vertical-rl; }
.bx-side-l { left: 8px; transform: rotate(180deg); }
.bx-side-r { right: 8px; }
.bx-status { position: absolute; top: 44px; left: 50%; transform: translateX(-50%); background: rgba(10,16,34,.85); color: #fff; padding: 8px 14px; border-radius: 10px; z-index: 6; font-size: .85rem; }
.bx-status.err { background: #8b1d1d; }
.bx-info { position: absolute; top: 10px; right: 10px; width: min(330px, calc(100% - 20px)); max-height: calc(100% - 70px); overflow: auto; background: var(--surface); color: var(--text); border-radius: 14px; padding: 14px 16px; z-index: 7; box-shadow: 0 12px 28px rgba(0,0,0,.35); font-size: .9rem; }
.bx-info h3 { margin: 0 0 6px; font-size: 1.1rem; padding-right: 20px; }
.bx-info p { margin: 6px 0; }
.bx-eyebrow { margin: 0; color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; }
.bx-x { position: absolute; top: 6px; right: 8px; border: 0; background: none; font-size: 1.4rem; line-height: 1; color: var(--muted); cursor: pointer; }
.bx-info-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.bx-src { margin: 2px 0; }
.bx-start { position: absolute; inset: 0; display: grid; place-items: center; align-content: center; gap: 12px; z-index: 3; color: #fff; text-align: center; padding: 20px; }
.bx-start img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: .55; }
.bx-start .btn, .bx-start p { position: relative; }
.bx-fallback { display: none; }
.bx-nogl .bx-stage-host { display: none; }
.bx-nogl .bx-fallback { display: block; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.bx-fallback img { width: 100%; height: auto; border-radius: 12px; background: #0d1222; }
.bx-how { margin: 8px 2px; }
.bx-tour, .bx-steps, .bx-quiz { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin-top: 12px; }
.bx-tour h2 { font-size: 1.1rem; margin: 0 0 4px; }
.bx-caption { margin: 10px 0; min-height: 1.5em; }
.bx-step-ctl { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.bx-step-list { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 10px 0 0; counter-reset: st; }
.bx-step { border: 1px solid var(--line); background: var(--surface-2); color: var(--text); border-radius: 999px; padding: 4px 12px; font: 600 .8rem var(--font); cursor: pointer; }
.bx-step-list li { counter-increment: st; }
.bx-step::before { content: counter(st) ". "; color: var(--muted); }
.bx-step.on { background: var(--blue); color: #fff; border-color: var(--blue); }
.bx-step.on::before { color: #fff; }
.bx-step.done { border-color: #22c55e; }
.bx-progress { flex: 1 1 120px; height: 6px; background: var(--surface-2); border-radius: 99px; overflow: hidden; min-width: 80px; }
.bx-progress span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #1e6bff, #22c55e); transition: width .3s; }
.bx-quiz-head { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; }
.bx-quiz-modes { display: flex; flex-wrap: wrap; gap: 6px; }
.bx-quiz-modes .pill { padding: 4px 10px; font-size: .82rem; }
.bx-q p { margin: 10px 0 6px; }
.bx-opts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.bx-opt { text-align: left; padding: 9px 12px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface-2); color: var(--text); font: inherit; cursor: pointer; }
.bx-opt.ok, .bx-order li.ok { border-color: #22c55e; background: rgba(34,197,94,.14); }
.bx-opt.bad, .bx-order li.bad { border-color: #e5484d; background: rgba(229,72,77,.12); }
.bx-q .ok { color: var(--ok); font-weight: 700; }
.bx-q .bad { color: #d23b3b; font-weight: 700; }
.bx-order { padding-left: 1.4em; }
.bx-order li { display: flex; align-items: center; gap: 6px; padding: 4px 8px; border: 1px solid var(--line); border-radius: 8px; margin: 4px 0; }
.bx-order li span { flex: 1; }
.bx-catalog-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; }
.bx-filter { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.bx-filter input, .bx-filter select { padding: 7px 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.bx-sys { margin: 18px 0 26px; border-top: 4px solid var(--sys); padding-top: 10px; scroll-margin-top: 80px; }
.bx-sys h3 { margin: 0; font-size: 1.2rem; display: flex; gap: 8px; align-items: center; }
.bx-cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; margin-top: 10px; }
.bx-acard { display: flex; flex-direction: column; text-decoration: none; color: var(--text); background: var(--surface); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; transition: transform .15s, border-color .15s; }
.bx-acard:hover { transform: translateY(-3px); border-color: var(--sys); }
.bx-acard.seen .bx-abody strong::after { content: " \2713"; color: #22c55e; }
.bx-athumb { aspect-ratio: 4 / 3; background: radial-gradient(circle at 50% 35%, #1b2440, #070a14); display: grid; place-items: center; font-size: 2.4rem; }
.bx-athumb img { width: 100%; height: 100%; object-fit: cover; }
.bx-abody { display: flex; flex-direction: column; gap: 3px; padding: 9px 11px 11px; }
.bx-abody strong { font-size: .93rem; line-height: 1.25; }
.bx-abody .badge { align-self: flex-start; }
.bx-note { background: rgba(255, 216, 61, .16); border: 1px solid rgba(199, 150, 0, .4); border-radius: 12px; padding: 10px 14px; }
.bx-credits { margin-top: 10px; }
.bx-asset-head { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 14px; }
.bx-asset-icon { flex: none; width: 64px; height: 64px; border-radius: 18px; display: grid; place-items: center; font-size: 2rem; background: linear-gradient(135deg, var(--sys), #1e3a8a); }
.bx-asset-head h1 { margin: 0 0 4px; }
.bx-names { margin: 0 0 6px; color: var(--muted); }
.bx-asset-shell { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); align-items: start; }
.bx-viewer { min-width: 0; }
.bx-cards .card { margin-bottom: 12px; }
.bx-card h2 { font-size: 1.1rem; margin: 0 0 8px; }
.bx-dl dt { font-weight: 700; margin-top: 8px; }
.bx-dl dd { margin: 2px 0 0; }
.bx-vocab { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 0; }
.bx-vocab dt { font-weight: 700; }
.bx-vocab dd { margin: 0; color: var(--muted); }
.bx-mis { margin-top: 10px; border-left: 4px solid #e5a000; padding: 4px 12px; background: var(--surface-2); border-radius: 0 10px 10px 0; }
.bx-mis p { margin: 4px 0; }
.bx-mis .bad { color: #c0392b; }
.bx-mis .ok { color: var(--ok); font-weight: 600; }
.bx-partlist { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.bx-chip { border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 999px; padding: 3px 10px; font: 500 .8rem var(--font); cursor: pointer; }
.bx-chip:hover { border-color: var(--blue); }
.bx-refs { padding-left: 1.2em; }
.bx-gate p { max-width: 380px; }
.bx-teach .bx-layers { display: none; }
.bx-teach.bx-shell { grid-template-columns: 1fr; }
.bx-teach .bx-stage-tall { height: 86vh; }
.bx-teach .bx-label { font-size: .95rem; }
.bx-max { position: fixed; inset: 0; z-index: 999; background: #05070d; overflow: auto; padding: 10px; }
.bx-shell:fullscreen { background: #05070d; padding: 10px; overflow: auto; }
.bx-shell:fullscreen .bx-stage-host { height: calc(100vh - 40px); }
.bx-shot .bx-orient, .bx-shot .bx-side, .bx-shot .bx-info, .bx-shot .bx-status { display: none !important; }
.bx-shot .bx-stage-host { border-radius: 0; box-shadow: none; }
.bx-labcard { display: grid; grid-template-columns: auto 1fr auto; grid-template-rows: auto auto; column-gap: 14px; align-items: center; margin: 0 0 22px; padding: 16px 20px; border-radius: 18px; color: #fff !important; text-decoration: none;
  background: radial-gradient(600px 200px at 85% 0%, rgba(120, 190, 255, .35), transparent 60%), linear-gradient(120deg, #0b3fa8, #1e88e5); box-shadow: 0 12px 28px rgba(13, 60, 160, .28); }
.bx-labcard > span:first-child { grid-row: span 2; font-size: 2.4rem; }
.bx-labcard strong { font: 800 1.25rem var(--display); }
.bx-labcard .go { grid-row: 1 / span 2; grid-column: 3; background: #ffd83d; color: #10204a; border-radius: 999px; padding: 6px 14px; font-weight: 800; }
@media (max-width: 980px) {
  .bx-shell, .bx-asset-shell { grid-template-columns: 1fr; }
  .bx-layers { position: static; }
  .bx-layers .bx-layer { display: inline-flex; }
}
@media (max-width: 680px) {
  .bx-hero { grid-template-columns: 1fr; padding: 18px; }
  .bx-hero-thumb { display: none; }
  .bx-checks { grid-template-columns: 1fr; }
  .bx-stage-host, .bx-stage-tall { height: 70vh; min-height: 420px; }
  .bx-opts { grid-template-columns: 1fr; }
  .bx-explode input, .bx-cut input { width: 80px; }
  .bx-orient { top: 6px; font-size: .68rem; }
  .bx-info { top: auto; bottom: 64px; max-height: 45%; }
}
@media print {
  .bx-stage-host, .bx-toolbar, .bx-steps-host, .bx-quiz-host, .bx-partlist, .bx-how, .pager { display: none !important; }
  .bx-fallback { display: block !important; }
  .bx-asset-shell { grid-template-columns: 1fr; }
}
@media (max-width: 520px) { .k12-opts { grid-template-columns: 1fr; } }

/* ---------- Play & Learn 3D and the Class 1-2 "kid world" (play.php, subject.php, classes.php) ---------- */
.kid-world {
  --k-ink: #2a1d5c; --k-muted: #5b4f86; --k-purple: #6d3df5; --k-purple-2: #8f5bff; --k-wood: #8a4f1d; --k-wood-2: #b8742f;
  position: relative; overflow: hidden; isolation: isolate; color: var(--k-ink);
  border-radius: 26px; padding: 26px 22px 22px; margin-bottom: 22px;
  background:
    radial-gradient(ellipse 70% 38% at 18% 100%, #74cc4f 0 60%, transparent 61%),
    radial-gradient(ellipse 75% 40% at 85% 104%, #5fbd3f 0 60%, transparent 61%),
    linear-gradient(180deg, #8fd3ff 0%, #c9ecff 52%, #e8f9d6 78%, #a4e07a 100%);
  box-shadow: 0 18px 40px rgba(20, 40, 90, .25), inset 0 0 0 4px rgba(255, 255, 255, .55);
}
.play-sky { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.play-sun { position: absolute; top: -40px; right: 8%; width: 130px; height: 130px; border-radius: 50%; background: radial-gradient(circle, #fff7b0 0 40%, #ffd84a 60%, rgba(255, 216, 74, 0) 72%); animation: kid-glow 5s ease-in-out infinite; }
.play-cloud { position: absolute; width: 120px; height: 36px; border-radius: 40px; background: #fff; opacity: .9; filter: drop-shadow(0 6px 8px rgba(60, 120, 180, .15)); animation: kid-drift 38s linear infinite; }
.play-cloud::before, .play-cloud::after { content: ""; position: absolute; background: #fff; border-radius: 50%; }
.play-cloud::before { width: 54px; height: 54px; left: 18px; top: -26px; }
.play-cloud::after { width: 40px; height: 40px; left: 58px; top: -18px; }
.play-cloud.c1 { top: 34px; left: 6%; }
.play-cloud.c2 { top: 70px; left: 46%; transform: scale(.7); animation-duration: 52s; }
.play-cloud.c3 { top: 22px; left: 72%; transform: scale(.85); animation-duration: 46s; }
@keyframes kid-drift { from { translate: -40px 0; } 50% { translate: 40px 0; } to { translate: -40px 0; } }
@keyframes kid-glow { 50% { scale: 1.08; } }

.play-sign {
  display: inline-block; margin: 0 auto; padding: 10px 30px 12px; border-radius: 18px;
  font-family: var(--display); font-weight: 800; font-size: clamp(1.5rem, 4vw, 2.5rem); line-height: 1.15; color: #fff;
  background: linear-gradient(180deg, var(--k-wood-2), var(--k-wood)); text-shadow: 0 3px 0 rgba(0, 0, 0, .25);
  box-shadow: 0 6px 0 #5c3210, 0 12px 22px rgba(60, 30, 0, .35), inset 0 2px 0 rgba(255, 255, 255, .25);
  transform: rotate(-1.5deg);
}
.kid-ribbon { display: table; margin: 12px auto 0; padding: 6px 22px; border-radius: 999px; font-family: var(--display); font-weight: 800; font-size: 1.05rem; color: #fff; background: linear-gradient(90deg, var(--k-purple), var(--k-purple-2)); box-shadow: 0 4px 0 #4a23b8; }
.kid-board { margin: 8px 0 0; font-size: .82rem; color: var(--k-muted); }

/* class page: subject tiles */
.kid-class { text-align: center; }
.kid-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px; margin-top: 24px; }
.kid-tile {
  display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 18px 10px 14px; border-radius: 22px; text-decoration: none; color: #fff;
  background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 70%, #fff) 0%, var(--accent) 55%, color-mix(in srgb, var(--accent) 70%, #000) 100%);
  box-shadow: 0 6px 0 color-mix(in srgb, var(--accent) 60%, #000), 0 14px 24px rgba(20, 40, 90, .25), inset 0 0 0 3px rgba(255, 255, 255, .35);
  transition: transform .18s ease;
}
.kid-tile:hover, .kid-tile:focus-visible { transform: translateY(-4px) rotate(-1deg); }
.kid-tile-icon { display: grid; place-items: center; width: 74px; height: 74px; border-radius: 50%; background: rgba(255, 255, 255, .92); font-size: 2.4rem; font-family: var(--display); font-weight: 800; color: var(--accent); box-shadow: inset 0 -4px 0 rgba(0, 0, 0, .08); }
.kid-tile strong { font-family: var(--display); font-size: 1.15rem; line-height: 1.15; text-shadow: 0 2px 0 rgba(0, 0, 0, .2); }
.kid-tile small { padding: 2px 12px; border-radius: 999px; background: rgba(255, 255, 255, .92); color: var(--k-ink); font-weight: 700; }

/* subject page banner */
.kid-banner { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 20px; align-items: center; min-height: 230px; }
.kid-banner-main { text-align: center; }
.kid-badge-icon { display: inline-grid; place-items: center; width: 68px; height: 68px; margin-bottom: 8px; border-radius: 20px; font-size: 2.3rem; font-family: var(--display); font-weight: 800; color: #fff; background: var(--accent); box-shadow: 0 5px 0 color-mix(in srgb, var(--accent) 60%, #000); }
.kid-actions { display: flex; flex-direction: column; gap: 8px; padding: 12px; border-radius: 20px; background: rgba(255, 255, 255, .9); box-shadow: 0 10px 24px rgba(20, 40, 90, .2); }
.kid-actions a, .kid-actions button { display: flex; align-items: center; gap: 10px; padding: 9px 12px; border-radius: 12px; border: 0; background: #f2efff; color: var(--k-ink); font: 700 .95rem var(--font); text-decoration: none; cursor: pointer; text-align: start; }
.kid-actions a:hover, .kid-actions button:hover { background: var(--k-purple); color: #fff; }
.kid-actions span { font-size: 1.1rem; }

/* chapter and game cards */
.kid-cards { list-style: none; margin: 0 0 22px; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 18px; }
.kid-card { position: relative; display: flex; flex-direction: column; border-radius: 24px; padding: 10px 10px 14px; background: linear-gradient(180deg, #fff, #f3f0ff); color: #2a1d5c; box-shadow: 0 6px 0 #d8d0ff, 0 16px 30px rgba(20, 40, 90, .22); }
.kid-card h2 { margin: 12px 8px 10px; font-family: var(--display); font-size: 1.3rem; line-height: 1.2; color: #2a1d5c; }
.kid-card-art { position: relative; aspect-ratio: 16 / 10; border-radius: 18px; overflow: hidden; background: linear-gradient(180deg, #a9dcff, #dff4ff 60%, #9fdc73 61%, #7cc95a); display: grid; place-items: center; }
.kid-card-emoji { font-size: 4.4rem; filter: drop-shadow(0 6px 6px rgba(0, 0, 0, .2)); }
.play-thumb { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .5s ease; }
.play-thumb.ready { opacity: 1; }
.play-thumb:not([src]) { display: none; }
.kid-num { position: absolute; top: 10px; left: 10px; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; font: 800 1.35rem var(--display); color: #fff; background: radial-gradient(circle at 35% 30%, #ff7ad9, #c2187f); box-shadow: 0 4px 0 #8a0f5a, 0 0 0 3px #fff; }
.kid-done { position: absolute; top: 12px; right: 12px; padding: 2px 10px; border-radius: 999px; background: #fff7cc; color: #6b4a00; font-weight: 800; font-size: .85rem; }
.kid-done:empty { display: none; }
.kid-card-btns { display: flex; flex-direction: column; align-items: stretch; gap: 8px; margin: auto 8px 0; text-align: center; }
.kid-link { color: #6d3df5; font-weight: 700; text-decoration: none; }
.kid-link:hover { text-decoration: underline; }
.play-btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; border-radius: 999px; border: 0; cursor: pointer; text-decoration: none; font: 800 1rem var(--display); color: #fff; background: linear-gradient(180deg, #8f5bff, #6d3df5); box-shadow: 0 4px 0 #4a23b8, 0 8px 16px rgba(80, 40, 200, .3); transition: transform .12s ease; }
.play-btn:hover { transform: translateY(-2px); }
.play-btn:active { transform: translateY(2px); box-shadow: 0 2px 0 #4a23b8; }
.play-go { flex: 1; }

.kid-games { margin: 0 0 24px; }
.kid-h2 { margin: 6px 0 2px; font: 800 1.6rem var(--display); }
.kid-sub { margin: 0 0 14px; color: var(--muted); }
.play-n { display: inline-grid; place-items: center; min-width: 1.5em; height: 1.5em; margin-inline-end: 6px; border-radius: 50%; background: #6d3df5; color: #fff; font-size: .62em; vertical-align: .25em; }
.play-answer.right .play-n { background: #fff; color: #1f9d55; }
.play-letter { font-size: 1.25em; line-height: 1; }
.kid-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin: 0 0 28px; }
.kid-strip a { display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 12px; align-items: center; padding: 12px 16px; border-radius: 18px; text-decoration: none; color: #2a1d5c; background: linear-gradient(180deg, #fffdf2, #fff3c4); box-shadow: 0 5px 0 #f0d77a, 0 10px 20px rgba(20, 40, 90, .18); }
.kid-strip a:nth-child(2) { background: linear-gradient(180deg, #fffaf0, #ffe2b3); box-shadow: 0 5px 0 #f3bf6c, 0 10px 20px rgba(20, 40, 90, .18); }
.kid-strip a:nth-child(3) { background: linear-gradient(180deg, #f6f2ff, #e3d9ff); box-shadow: 0 5px 0 #c3b2ff, 0 10px 20px rgba(20, 40, 90, .18); }
.kid-strip a:nth-child(4) { background: linear-gradient(180deg, #eef9ff, #cdeeff); box-shadow: 0 5px 0 #9fd5f5, 0 10px 20px rgba(20, 40, 90, .18); }
.kid-strip span { grid-row: span 2; font-size: 2rem; }
.kid-strip b { font-family: var(--display); font-size: 1.1rem; }
.kid-strip small { color: #5b4f86; font-weight: 600; }

/* chapter page banner */
.kid-cta { display: grid; grid-template-columns: 220px minmax(0, 1fr) auto; align-items: center; gap: 18px; margin: 4px 0 20px; padding: 12px 18px 12px 12px; border-radius: 22px; text-decoration: none; color: #2a1d5c; background: linear-gradient(100deg, #fff7d6, #e9fbff 60%, #efe8ff); box-shadow: 0 6px 0 #d8d0ff, 0 14px 28px rgba(20, 40, 90, .25); }
.kid-cta-art { position: relative; display: grid; place-items: center; aspect-ratio: 16 / 10; border-radius: 16px; overflow: hidden; background: linear-gradient(180deg, #a9dcff, #dff4ff 60%, #9fdc73 61%); }
.kid-cta-text strong { display: block; font: 800 1.35rem var(--display); }
.kid-cta-text small { color: #5b4f86; font-size: .95rem; }

/* the game page */
.play-game { padding: 18px; }
.play-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 14px; }
.play-top .play-sign { margin: 0; font-size: clamp(1.3rem, 3vw, 2rem); }
.play-levels { display: flex; gap: 6px; padding: 5px; border-radius: 999px; background: rgba(255, 255, 255, .85); box-shadow: 0 6px 16px rgba(20, 40, 90, .15); }
.play-level { border: 0; padding: 8px 14px; border-radius: 999px; background: transparent; font: 800 .95rem var(--display); color: #2a1d5c; cursor: pointer; }
.play-level.on { background: linear-gradient(180deg, #8f5bff, #6d3df5); color: #fff; box-shadow: 0 3px 0 #4a23b8; }
.play-stars { padding: 8px 16px; border-radius: 999px; background: #fff7cc; font: 800 1.2rem var(--display); color: #6b4a00; box-shadow: 0 4px 0 #f0d77a; }
.play-body { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 16px; align-items: start; }
.play-stage-wrap { position: relative; display: flex; flex-direction: column; gap: 12px; }
.play-question { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: 20px; background: rgba(255, 255, 255, .94); box-shadow: 0 6px 18px rgba(20, 40, 90, .18); }
.play-question p { margin: 0; font: 800 clamp(1.1rem, 2.4vw, 1.5rem) var(--display); line-height: 1.25; color: #2a1d5c; }
.play-round { flex: none; width: 48px; height: 48px; border-radius: 50%; border: 0; cursor: pointer; font-size: 1.4rem; background: linear-gradient(180deg, #ffd84a, #ffb000); box-shadow: 0 4px 0 #c27f00; }
.play-round:active { transform: translateY(2px); box-shadow: 0 2px 0 #c27f00; }
.play-stage { position: relative; height: clamp(320px, 52vh, 520px); border-radius: 22px; overflow: hidden; background: #bfe7ff; box-shadow: inset 0 0 0 4px rgba(255, 255, 255, .7), 0 12px 26px rgba(20, 40, 90, .25); touch-action: pan-y; }
.play-stage canvas { display: block; width: 100%; height: 100%; }
.play-loading, .play-nogl { position: absolute; inset: 0; display: grid; place-items: center; margin: 0; font-size: 2rem; color: #2a1d5c; }
.play-nogl { font-size: 1.1rem; font-weight: 700; }
.play-answers { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.play-answer { min-width: 84px; padding: 12px 22px; border-radius: 20px; border: 0; cursor: pointer; font: 800 clamp(1.3rem, 3vw, 1.9rem) var(--display); color: #2a1d5c; background: linear-gradient(180deg, #ffffff, #eae4ff); box-shadow: 0 6px 0 #b9a8ff, 0 10px 18px rgba(60, 30, 160, .2); transition: transform .12s ease; }
.play-answer:hover:not(:disabled) { transform: translateY(-3px); }
.play-answer:active:not(:disabled) { transform: translateY(3px); box-shadow: 0 3px 0 #b9a8ff; }
.play-answer.right { color: #fff; background: linear-gradient(180deg, #4fdc8a, #1f9d55); box-shadow: 0 6px 0 #137040; animation: kid-pop .5s ease; }
.play-answer.wrong { opacity: .45; }
.play-answer.shake { animation: kid-shake .45s ease; }
.play-answer:disabled { cursor: default; }
.play-swatch { font-size: 1.6em; line-height: 1; vertical-align: -.1em; text-shadow: 0 2px 0 rgba(0, 0, 0, .15); }
@keyframes kid-pop { 40% { transform: scale(1.18); } }
@keyframes kid-shake { 20%, 60% { transform: translateX(-8px); } 40%, 80% { transform: translateX(8px); } }
.play-tools { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px; }
.play-hint { background: linear-gradient(180deg, #ffd84a, #ffb000); color: #4a3000; box-shadow: 0 4px 0 #c27f00; }
.play-next { background: linear-gradient(180deg, #4fdc8a, #1f9d55); box-shadow: 0 4px 0 #137040; }
.play-hint-text { flex-basis: 100%; margin: 0; padding: 10px 14px; border-radius: 14px; text-align: center; font-weight: 700; color: #4a3000; background: #fff7cc; }
.play-fx { position: absolute; inset: 0; pointer-events: none; overflow: visible; z-index: 5; }
.play-fx i { position: absolute; top: 45%; width: 10px; height: 14px; border-radius: 3px; animation: kid-confetti 1.5s cubic-bezier(.2, .7, .4, 1) forwards; }
.play-fx i.star { width: 18px; height: 18px; border-radius: 0; clip-path: polygon(50% 0, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%); background: #ffd21f !important; }
@keyframes kid-confetti { 0% { transform: translate(0, 0) rotate(0); opacity: 1; } 100% { transform: translate(var(--dx), calc(var(--dy) + 420px)) rotate(var(--r)); opacity: 0; } }
.play-toast { position: absolute; top: 74px; left: 50%; z-index: 6; translate: -50% 0; max-width: 90%; padding: 12px 22px; border-radius: 999px; text-align: center; font: 800 1.15rem var(--display); color: #2a1d5c; background: #fff; box-shadow: 0 10px 30px rgba(20, 40, 90, .3); }
.play-toast.pop { animation: kid-pop .45s ease; }
.play-toast span { margin-inline-start: 6px; color: #d14b00; }
.play-side { display: flex; flex-direction: column; gap: 14px; }
.play-panel { padding: 14px; border-radius: 20px; background: rgba(255, 255, 255, .92); box-shadow: 0 8px 20px rgba(20, 40, 90, .18); }
.play-panel h2 { margin: 0 0 10px; font: 800 1.15rem var(--display); color: #2a1d5c; }
.play-menu { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.play-menu a { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 12px; color: #2a1d5c; text-decoration: none; font-weight: 700; background: #f4f1ff; }
.play-menu a.on, .play-menu a:hover { background: linear-gradient(180deg, #8f5bff, #6d3df5); color: #fff; }
.play-menu em { margin-inline-start: auto; font-style: normal; font-size: .8rem; }
.play-badges { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.play-badges li { display: grid; place-items: center; aspect-ratio: 1; border-radius: 50%; background: #ece8f7; filter: grayscale(1); opacity: .45; font-size: 1.3rem; }
.play-badges li small { display: none; }
.play-badges li.got { filter: none; opacity: 1; background: radial-gradient(circle at 35% 30%, #fff7b0, #ffcf3a); box-shadow: 0 3px 0 #c99a00; }
.muted-dark { color: #5b4f86; margin: 8px 0 0; }
.play-read { width: 100%; }

/* Class 3 topic page (topic3d.php) */
.c3-step { margin: 0 0 22px; scroll-margin-top: 80px; }
.c3-step > h2, .c3-h { display: flex; align-items: center; gap: 10px; font-family: var(--display); }
.c3-num { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(180deg, #8f5bff, #6d3df5); color: #fff; font: 800 1.05rem var(--display); box-shadow: 0 3px 0 #4a23b8; flex: none; }
.c3-spark { display: flex; align-items: center; gap: 12px; margin: 0 0 8px; font: 800 clamp(1.15rem, 2.4vw, 1.5rem) var(--display); }
.c3-steps a.done { background: #dcf7d6; }
.c3-tick { margin-inline-start: auto; font-style: normal; }
.c3-steps a.done .c3-tick::after { content: "✓"; color: #1f9d55; font-weight: 800; }
.c3-levels { display: flex; flex-wrap: wrap; gap: 10px; }
.c3-mastery { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-width: 520px; }
.c3-mastery li { display: grid; grid-template-columns: 110px 1fr 70px; align-items: center; gap: 10px; }
.c3-bar { height: 12px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.c3-bar i { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, #4fdc8a, #1f9d55); transition: width .4s ease; }
.c3-q { margin: 0 0 16px; padding: 12px 14px; border-radius: 14px; background: var(--surface-2); }
.c3-qtext { font-weight: 700; margin: 0 0 8px; }
.c3-note { display: grid; gap: 4px; margin: 0 0 8px; font-weight: 600; font-size: .9rem; }
.c3-note textarea { width: 100%; border-radius: 10px; border: 1px solid var(--line); padding: 8px 10px; font: inherit; background: var(--surface); color: var(--text); }
.c3-done.on { background: linear-gradient(180deg, #4fdc8a, #1f9d55); box-shadow: 0 4px 0 #137040; }
.c3-gloss { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; }
.c3-gloss dt { margin: 0; }
.play-btn-alt { flex: 1; background: linear-gradient(180deg, #ffb35c, #ff8a00); box-shadow: 0 4px 0 #c46a00, 0 8px 16px rgba(255, 138, 0, .25); font-size: .9rem; }
.play-2d { display: grid; place-items: center; height: auto; min-height: 90px; }
@media (max-width: 900px) {
  .play-body { grid-template-columns: 1fr; }
  .kid-banner { grid-template-columns: 1fr; }
  .kid-actions { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .kid-cta { grid-template-columns: 1fr; text-align: center; }
}
@media (max-width: 520px) {
  .kid-world { padding: 18px 12px; border-radius: 20px; }
  .kid-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .play-answer { min-width: 64px; padding: 10px 16px; }
  .play-top { justify-content: center; }
}
@media (prefers-reduced-motion: reduce) { .play-cloud, .play-sun { animation: none; } }
@media print { .kid-actions, .kid-strip, .kid-card-btns .play-btn, .kid-cta { display: none !important; } .kid-world { box-shadow: none; } }

/* ---------- Classes 4-12 3D Learning Catalog (catalog412.php) ---------- */
.c412 { --c-ink: #22195a; }
.c412-hero { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; padding: 22px 24px; border-radius: 24px; color: var(--c-ink);
  background: linear-gradient(120deg, #e9f3ff 0%, #f3ecff 55%, #fff4e0 100%); box-shadow: 0 14px 34px rgba(30, 30, 90, .14); margin-bottom: 16px; }
.c412-hero h1 { margin: 0 0 6px; font: 800 clamp(1.5rem, 3.4vw, 2.4rem) var(--display); display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.c412-pill { padding: 4px 16px; border-radius: 999px; color: #fff; background: linear-gradient(90deg, #2a4fd6, #7a3df5); box-shadow: 0 4px 0 #3a23a8; }
.c412-lead { margin: 0; color: #4b4380; font-weight: 600; }
.c412-stats { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(90px, 1fr)); gap: 10px; }
.c412-stats li { padding: 10px 12px; border-radius: 16px; text-align: center; color: #fff; box-shadow: 0 4px 0 rgba(0, 0, 0, .15); }
.c412-stats li:nth-child(1) { background: #7a3df5; } .c412-stats li:nth-child(2) { background: #e0306f; } .c412-stats li:nth-child(3) { background: #2a4fd6; } .c412-stats li:nth-child(4) { background: #1f9d55; }
.c412-stats b { display: block; font: 800 1.5rem var(--display); }
.c412-stats span { font-size: .78rem; font-weight: 600; }
.c412-classes { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 18px; padding: 12px; border-radius: 20px; background: var(--surface); box-shadow: var(--shadow); }
.c412-classes-h { font: 800 1rem var(--display); margin-inline-end: 4px; }
.c412-class { display: grid; text-align: center; padding: 6px 12px; border-radius: 14px; text-decoration: none; color: var(--c-ink); background: #eef4ff; border: 2px solid transparent; }
.c412-class:nth-child(3n) { background: #fff1e0; } .c412-class:nth-child(3n+1) { background: #eafbea; }
.c412-class b { font: 800 .95rem var(--display); } .c412-class small { font-size: .72rem; font-weight: 600; opacity: .8; }
.c412-class.on, .c412-class:hover { border-color: #7a3df5; }
.c412-search { display: flex; gap: 6px; margin-inline-start: auto; }
.c412-search input { min-width: 220px; padding: 8px 12px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.c412-grid { display: grid; gap: 14px; }
.c412-row { --row: #2a4fd6; display: grid; grid-template-columns: 200px minmax(0, 1fr) 150px; align-items: stretch; gap: 10px; padding: 10px; border-radius: 20px;
  background: color-mix(in srgb, var(--row) 8%, var(--surface)); border: 1px solid color-mix(in srgb, var(--row) 25%, transparent); }
.c412-row-physics { --row: #1e6fe0; } .c412-row-chemistry { --row: #7a3df5; } .c412-row-biology { --row: #1f9d55; } .c412-row-evs { --row: #ff8a00; }
.c412-row-social { --row: #c2187f; } .c412-row-english { --row: #2a4fd6; } .c412-row-languages { --row: #e0306f; } .c412-row-computer { --row: #00838f; }
.c412-row-gk { --row: #6d4c41; } .c412-row-art { --row: #8e24aa; } .c412-row-pe { --row: #1565c0; } .c412-row-lifeskills { --row: #d84315; } .c412-row-math { --row: #5e35b1; }
.c412-row-h { margin: 0; display: flex; align-items: center; gap: 10px; padding: 12px; border-radius: 16px; color: #fff; font: 800 1.15rem/1.2 var(--display);
  background: linear-gradient(160deg, color-mix(in srgb, var(--row) 80%, #fff), var(--row)); box-shadow: 0 5px 0 color-mix(in srgb, var(--row) 60%, #000); }
.c412-row-h span { display: grid; place-items: center; width: 42px; height: 42px; flex: none; border-radius: 12px; background: rgba(255, 255, 255, .92); color: var(--row); font-size: 1.4rem; }
.c412-tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 8px; }
.c412-tile { display: flex; flex-direction: column; border-radius: 14px; overflow: hidden; text-decoration: none; color: var(--c-ink); background: #fff; box-shadow: 0 3px 10px rgba(20, 30, 80, .12); transition: transform .15s ease; }
.c412-tile:hover, .c412-tile:focus-visible { transform: translateY(-3px); }
.c412-pic { position: relative; display: block; aspect-ratio: 4 / 3; background: linear-gradient(180deg, #a9dcff, #dff4ff 60%, #9fdc73 61%); }
.c412-pic img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.c412-pic .play-thumb { opacity: 0; } .c412-pic .play-thumb.ready { opacity: 1; }
.c412-label { padding: 6px 8px 8px; font: 700 .8rem/1.2 var(--font); text-align: center; }
.c412-row-foot { display: grid; align-content: center; gap: 2px; padding: 10px; border-radius: 16px; text-decoration: none; color: var(--c-ink); background: #fff; font-size: .82rem; box-shadow: 0 3px 10px rgba(20, 30, 80, .1); }
.c412-row-foot b { font: 800 1.05rem var(--display); color: var(--row); } .c412-row-foot span { color: #6d3df5; font-weight: 700; }
.c412-includes { margin-top: 18px; padding: 14px 18px; border-radius: 20px; background: var(--surface); box-shadow: var(--shadow); }
.c412-includes h2 { margin: 0 0 8px; font: 800 1.15rem var(--display); }
.c412-includes ul { list-style: none; margin: 0 0 8px; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; font-weight: 600; }
.c412-subject { margin-bottom: 12px; } .c412-subject summary { cursor: pointer; font: 800 1.1rem var(--display); }
.c412-table td { vertical-align: top; } .c412-links a { display: inline-block; margin: 0 8px 4px 0; white-space: nowrap; font-weight: 600; }
:root[data-theme="dark"] .c412-tile, :root[data-theme="dark"] .c412-row-foot { background: #1a2b5c; color: #eef2ff; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .c412-tile, :root:not([data-theme="light"]) .c412-row-foot { background: #1a2b5c; color: #eef2ff; } }
@media (max-width: 900px) { .c412-row { grid-template-columns: 1fr; } .c412-stats { grid-template-columns: repeat(2, 1fr); } .c412-search { margin-inline-start: 0; width: 100%; } .c412-search input { flex: 1; min-width: 0; } }
.c412-cta { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; padding: 10px 18px; border-radius: 999px; text-decoration: none; font: 800 1rem var(--display); color: #fff; background: linear-gradient(90deg, #2a4fd6, #7a3df5); box-shadow: 0 4px 0 #3a23a8; }
.c412-cta:hover { transform: translateY(-2px); }

/* Physics 3D Laboratory (physics.php) */
.phys-hero { background-image: linear-gradient(90deg, rgba(8, 18, 60, .96) 0%, rgba(12, 30, 90, .85) 60%, rgba(40, 20, 90, .7) 100%); }
.viz .sim-badge { position: absolute; top: 10px; left: 10px; z-index: 5; padding: 4px 10px; border-radius: 999px; font-size: .78rem; font-weight: 700; color: #0b1440; background: rgba(255, 214, 102, .92); pointer-events: none; }
.phys-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.phys-grid ul { margin: 0; padding-left: 1.2em; }
.phys-steps { padding-left: 1.4em; } .phys-steps li { margin: 4px 0; }
.phys-safety { border-left: 5px solid #f39c12; background: color-mix(in srgb, #f39c12 10%, var(--card, #fff)); }
.phys-q { padding: 10px 0; border-top: 1px solid rgba(127, 127, 127, .2); } .phys-q:first-of-type { border-top: 0; }
.phys-obs td, .phys-obs th, .phys-mine td, .phys-mine th { text-align: center; }
.phys-render .breadcrumbs, .phys-render .lab-detail-head, .phys-render .lab-main > :not(.viz), .phys-render .lab-side, .phys-render .sim-badge { display: none !important; }
.phys-render .lab-view { display: block; } .phys-render .viz { width: 1024px; height: 1024px !important; margin: 0 auto; border-radius: 0; }
/* image renders: the scene only; labels go in the alt text and page, not into the picture */
.phys-render .viz-bar, .phys-render .viz-info, .phys-render .viz-ui, .phys-render .viz-labels { display: none !important; }
.phys-render .viz.viz-live .viz-canvas { position: absolute !important; inset: 0 !important; height: auto !important; }

/* Chemistry 3D Laboratory: virtual-lab banners and choice chips (also usable by any lab model) */
.chem-banner { margin: 0 0 14px; padding: 10px 14px; border-left: 4px solid #00897b; font-size: .92rem; }
.chem-banner.chem-warn { border-left-color: #e65100; background: #fff4e5; color: #6b2d00; }
.vchips { flex: 1 1 100%; }
.vchip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.vchip { border: 1px solid rgba(255,255,255,.35); background: rgba(255,255,255,.08); color: #eef2ff; border-radius: 999px; padding: 6px 12px; font: inherit; font-size: .85rem; cursor: pointer; min-height: 34px; }
.vchip[aria-pressed="true"] { background: var(--saffron); border-color: var(--saffron); color: #1b1b1b; font-weight: 700; }
.vchip:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }

/* Premium 3D labs: free-preview timer, sign-up overlay, plan prices with list price, sign-up extras */
.lab-timer { position: fixed; right: 16px; bottom: 16px; z-index: 60; background: #1f2a7a; color: #fff; border-radius: 999px; padding: 8px 14px; font-weight: 700; font-size: .9rem; box-shadow: 0 8px 24px rgba(0,0,0,.25); }
.lab-timer a { color: #ffd84a; }
.lab-trial-badge { background: #14532d; }
.lab-gate { position: fixed; inset: 0; z-index: 80; background: rgba(10,16,40,.78); backdrop-filter: blur(6px); display: grid; place-items: center; padding: 16px; overflow-y: auto; }
.lab-gate[hidden] { display: none; }
.lab-gate-card { background: var(--card, #fff); color: var(--ink, #1b2340); border-radius: 18px; max-width: 460px; width: 100%; padding: 26px 22px; box-shadow: 0 24px 60px rgba(0,0,0,.4); text-align: left; }
.lab-gate-card h2 { margin: 6px 0 8px; }
.lab-gate-card .lock-icon { font-size: 2.2rem; text-align: center; }
.lab-gate-card .btn-block { margin-top: 10px; }
.lab-plans { display: grid; gap: 10px; margin: 12px 0; }
.lab-plan { display: flex; justify-content: space-between; gap: 10px; align-items: center; flex-wrap: wrap; border: 2px solid #dfe4f2; border-radius: 12px; padding: 12px 14px; text-decoration: none; color: inherit; }
.lab-plan.hot { border-color: var(--saffron, #ff9f1a); }
.price-mrp { color: #8a93ad; font-weight: 400; }
.price-now { font-weight: 800; }
.price-off { background: #e8f8ee; color: #1b7f3b; border-radius: 999px; padding: 2px 8px; font-size: .78rem; font-weight: 700; white-space: nowrap; }
body.lab-locked { overflow: hidden; }
.btn-google { display: flex; align-items: center; justify-content: center; gap: 10px; background: #fff; color: #1f1f1f; border: 1px solid #dadce0; font-weight: 600; }
.or-line { display: flex; align-items: center; gap: 10px; color: #8a93ad; font-size: .85rem; margin: 12px 0; }
.or-line::before, .or-line::after { content: ''; flex: 1; border-top: 1px solid #dfe4f2; }
.opt-fields { border: 1px solid #dfe4f2; border-radius: 12px; padding: 10px 14px; margin: 10px 0; }
.opt-fields summary { cursor: pointer; font-weight: 600; }
.chip-checks { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-check { display: inline-flex; position: relative; }
.chip-check input { position: absolute; opacity: 0; }
.chip-check span { border: 1px solid #c9cfe3; border-radius: 999px; padding: 6px 12px; cursor: pointer; font-size: .88rem; }
.chip-check input:checked + span { background: var(--saffron, #ff9f1a); border-color: var(--saffron, #ff9f1a); color: #1b1b1b; font-weight: 700; }
.chip-check input:focus-visible + span { outline: 3px solid #2f7fe0; outline-offset: 2px; }
.plan .price-mrp, .plan .price-off { display: inline-block; }
@media (max-width: 480px) { .lab-timer { left: 16px; right: 16px; text-align: center; } }

/* ---------- Explore World (world.php): catalog rail | map / globe | facts panel; drawers and bottom sheet on small screens ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.wmap { display: grid; grid-template-columns: 260px minmax(0, 1fr) 350px; gap: 14px; padding: 14px; background: radial-gradient(circle at 50% 0%, #10234A, #071632 60%); color: #e8eeff; --surface: #101f44; --surface-2: #172a58; --line: #24396e; --text: #e8eeff; --muted: #a6b3d6; }
.wmap a { color: #9cc3ff; }
.wmap h3 { font-size: .92rem; margin: 14px 0 6px; color: #ffd36b; }
.wmap-side, .wmap-panel { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.wmap-side { background: rgba(10, 22, 52, .88); border: 1px solid #24396e; border-radius: 16px; padding: 14px; align-self: start; position: sticky; top: 70px; max-height: calc(100vh - 84px); overflow: auto; }
.wmap-intro h1 { font-size: 1.4rem; margin: 0 0 4px; }
.wmap-intro p { font-size: .84rem; color: #c3cdf0; margin: 0; }
.wmap-cat { display: grid; grid-template-columns: 1fr; gap: 2px; border-top: 1px solid #24396e; padding-top: 10px; }
.wmap-c { display: flex; align-items: center; gap: 10px; width: 100%; padding: 7px 10px; border: 0; border-radius: 10px; background: transparent; color: #e8eeff; font: 600 .9rem var(--font); text-align: start; cursor: pointer; }
.wmap-c .ico { width: 20px; text-align: center; }
.wmap-c:hover, .wmap-c:focus-visible { background: rgba(79, 140, 255, .18); outline: none; }
.wmap-c:focus-visible, .wbtn:focus-visible, .wmap-list button:focus-visible, .wchip:focus-visible, .wlink:focus-visible, .wmap-card:focus-visible, .wtabs [role=tab]:focus-visible { box-shadow: 0 0 0 3px #ffc842; outline: none; }
.wmap-c.on { background: linear-gradient(90deg, #2f6fe0, #4f8cff); }
.wmap-list { border-top: 1px solid #24396e; padding-top: 8px; font-size: .86rem; }
.wmap-list:empty { display: none; }
.wmap-list ul, .wmap-list ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 1px; }
.wmap-list ol { counter-reset: n; }
.wmap-list ol li { counter-increment: n; }
.wmap-list ol button::before { content: counter(n) "."; color: #8fa2d6; min-width: 22px; }
.wmap-list button { display: flex; align-items: center; gap: 8px; width: 100%; text-align: start; padding: 5px 8px; border: 0; border-radius: 8px; background: transparent; color: #e8eeff; font: 500 .86rem var(--font); cursor: pointer; }
.wmap-list button span { flex: 1; min-width: 0; }
.wmap-list button small { color: #93a2cf; text-align: end; }
.wmap-list button:hover { background: rgba(79, 140, 255, .2); }
.wmap-list button[data-start] { flex-direction: column; align-items: flex-start; gap: 0; }
.wmap-list button[data-start] small { text-align: start; }
.wlist-filter { width: 100%; margin: 4px 0 6px; padding: 7px 10px; border-radius: 10px; border: 1px solid #2c4383; background: #0c1a3c; color: #fff; font: inherit; }
.wband { border: 1px solid #2c4383; border-radius: 10px; padding: 8px 10px; margin: 8px 0; display: flex; flex-wrap: wrap; gap: 8px 14px; }
.wband legend { font-weight: 700; font-size: .84rem; padding: 0 4px; }
.wmap-main { position: relative; min-width: 0; display: flex; flex-direction: column; gap: 8px; }
.wmap-top { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.wmap-search { position: relative; flex: 1; min-width: 200px; }
.wmap-search input { width: 100%; padding: 10px 14px; border-radius: 12px; border: 1px solid #2c4383; background: #0c1a3c; color: #fff; font: inherit; }
.wmap-search input:focus { outline: 3px solid #ffc842; outline-offset: 1px; }
.wmap-results { position: absolute; z-index: 30; inset-inline: 0; top: calc(100% + 4px); margin: 0; padding: 4px; list-style: none; background: #0f2050; border: 1px solid #2c4383; border-radius: 12px; box-shadow: 0 12px 30px rgba(0, 0, 0, .45); max-height: 360px; overflow: auto; }
.wmap-results li { padding: 7px 10px; border-radius: 8px; cursor: pointer; font-size: .9rem; }
.wmap-results li small { color: #93a2cf; }
.wmap-results li[aria-selected=true], .wmap-results li:hover { background: #2f6fe0; }
.wmap-mode { display: inline-flex; border: 1px solid #2c4383; border-radius: 12px; overflow: hidden; }
.wmap-mode .wbtn { border: 0; border-radius: 0; }
.wbtn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 12px; border: 1px solid #2c4383; border-radius: 10px; background: #12275a; color: #e8eeff; font: 600 .86rem var(--font); cursor: pointer; }
.wbtn:hover { background: #1a3576; }
.wbtn.on, .wbtn[aria-pressed=true] { background: #2f6fe0; border-color: #4f8cff; }
.wbtn-go { background: #ff8a00; border-color: #ff8a00; color: #1b1000; }
.wbtn-go:hover { background: #ffa033; }
.wmap-drawer-btn, .wmap-sheet-close { display: none; }
.wmap-crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: .84rem; min-height: 22px; }
.wmap-crumbs button { background: none; border: 0; color: #9cc3ff; font: inherit; cursor: pointer; padding: 0; text-decoration: underline; }
.wmap-crumbs .wmap-back { margin-inline-start: auto; text-decoration: none; border: 1px solid #2c4383; border-radius: 8px; padding: 2px 8px; }
.wmap-stage { position: relative; height: calc(100vh - 190px); min-height: 520px; border-radius: 16px; overflow: hidden; border: 1px solid #24396e; background: #0a1c42; }
.wmap.is-full .wmap-stage { height: calc(100vh - 120px); }
.wmap.is-full { height: 100vh; overflow: auto; }
.wmap-stage .wmap-map { position: absolute; inset: 0; width: 100%; height: 100%; }
.wmap-map:focus-visible { outline: 3px solid #ffc842; outline-offset: -3px; }
.wmap-loading { position: absolute; inset: 0; display: grid; place-content: center; justify-items: center; gap: 10px; color: #c3cdf0; text-align: center; padding: 20px; }
.wmap-spin { width: 34px; height: 34px; border-radius: 50%; border: 3px solid #2c4383; border-top-color: #ffc842; animation: wspin 1s linear infinite; }
@keyframes wspin { to { transform: rotate(360deg); } }
.wmap-labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 2; }
.wl { position: absolute; left: 0; top: 0; white-space: nowrap; font: 600 12px/1.1 var(--font); color: #fff; text-shadow: 0 0 3px #071632, 0 0 6px #071632, 0 1px 2px #000; pointer-events: auto; cursor: pointer; will-change: transform; }
.wl-country { font-size: 12.5px; letter-spacing: .02em; }
.wl-sel { color: #ffd36b; font-size: 14px; font-weight: 800; }
.wl-ocean { font: italic 600 14px/1 var(--font); letter-spacing: .25em; color: #9fc0ff; text-transform: uppercase; }
.wl-sea { font-style: italic; color: #8fb3ff; font-weight: 500; }
.wl-cap { color: #ffe39a; font-size: 11.5px; }
.wl-city { color: #e5ebff; font-size: 11px; font-weight: 500; }
.wl-range { color: #f4caa0; font-style: italic; font-size: 11px; letter-spacing: .08em; }
.wl-desert { color: #ffe1a0; font-style: italic; font-size: 11px; }
.wl-plateau { color: #e6d5a8; font-style: italic; font-size: 11px; }
.wl-river { color: #8fd0ff; font-style: italic; font-size: 10.5px; font-weight: 500; }
.wmap-tip { position: absolute; left: 0; top: 0; z-index: 5; pointer-events: none; background: rgba(8, 20, 50, .95); border: 1px solid #2c4383; border-radius: 10px; padding: 6px 10px; font-size: .84rem; max-width: 240px; }
.wmap-tip .wflag { vertical-align: middle; margin-inline-end: 4px; }
.wmap-tools { position: absolute; top: 10px; inset-inline-end: 10px; z-index: 6; display: flex; gap: 6px; }
.wmap-tools .wbtn { background: rgba(14, 32, 76, .92); min-width: 38px; justify-content: center; }
.wmap-layers { position: absolute; top: 56px; inset-inline-end: 10px; z-index: 7; width: 260px; max-height: calc(100% - 120px); overflow: auto; background: rgba(10, 22, 52, .96); border: 1px solid #2c4383; border-radius: 14px; padding: 10px 14px; }
.wmap-layers h2 { font-size: 1rem; margin: 0 0 6px; }
.wmap-legend ul { list-style: none; margin: 0; padding: 0; font-size: .78rem; display: grid; gap: 3px; }
.wmap-legend i, .wlegend-list i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-inline-end: 6px; vertical-align: -1px; }
.wlegend-list { list-style: none; padding: 0; font-size: .82rem; }
.wmap-keys { position: absolute; top: 58px; left: 50%; transform: translateX(-50%); z-index: 3; margin: 0; background: rgba(8, 20, 50, .8); padding: 3px 10px; border-radius: 8px; font-size: .74rem; opacity: 0; transition: opacity .2s; pointer-events: none; }
.wmap-stage:focus-within .wmap-keys { opacity: 1; }
.wmap-note { margin: 0; font-size: .78rem; color: #a6b3d6; }
.wmap-wild { width: 30px; height: 30px; border-radius: 50%; border: 2px solid #ffc842; background: rgba(10, 28, 66, .9); font-size: 16px; line-height: 1; cursor: pointer; padding: 0; }
.wmap-wild:focus-visible { box-shadow: 0 0 0 3px #fff; outline: none; }
.wmap .maplibregl-ctrl-group { background: rgba(14, 32, 76, .92); }
.wmap .maplibregl-ctrl-group button + button { border-top-color: #2c4383; }
.wmap .maplibregl-ctrl-icon { filter: invert(1) brightness(1.4); }
.wmap .maplibregl-ctrl-scale { background: rgba(10, 22, 52, .8); color: #e8eeff; border-color: #c9d6ff; }
.wmap .maplibregl-ctrl.maplibregl-ctrl-attrib { background: rgba(10, 22, 52, .85); color: #c3cdf0; }
.wmap .maplibregl-ctrl-attrib a { color: #9cc3ff; }
.wmap .maplibregl-ctrl-attrib-button { filter: invert(1); }
.wmap-panel { align-self: start; position: sticky; top: 70px; max-height: calc(100vh - 84px); overflow: auto; }
.wmap-detail { background: rgba(10, 22, 52, .92); border: 1px solid #24396e; padding: 16px; min-height: 260px; }
.wmap-detail:focus { outline: none; }
.wmap-empty { text-align: center; color: #c3cdf0; padding: 20px 6px; }
.wdetail-head { display: flex; gap: 12px; align-items: center; margin-bottom: 8px; }
.wdetail-head h2 { margin: 0; font-size: 1.35rem; }
.wdetail-head .eyebrow { margin: 0; }
.wdetail-photo { margin: -16px -16px 10px; }
.wdetail-photo img { width: 100%; height: auto; display: block; border-radius: 14px 14px 0 0; }
.wdetail-photo figcaption { padding: 4px 16px 0; }
.wflag { border-radius: 3px; box-shadow: 0 0 0 1px rgba(255, 255, 255, .25); vertical-align: middle; object-fit: cover; flex: none; }
.wflag-none { display: inline-block; width: 20px; height: 15px; background: #2c4383; }
.wkind { font-size: 2rem; }
.wmap-save { margin: 2px 0 10px; font-size: .8rem; padding: 4px 10px; }
.wtabs { display: flex; flex-wrap: wrap; gap: 4px; border-bottom: 1px solid #24396e; margin-bottom: 10px; }
.wtabs [role=tab] { border: 0; background: transparent; color: #c3cdf0; font: 600 .82rem var(--font); padding: 6px 8px; border-radius: 8px 8px 0 0; cursor: pointer; border-bottom: 3px solid transparent; }
.wtabs [role=tab][aria-selected=true] { color: #fff; border-bottom-color: #ffc842; background: rgba(79, 140, 255, .14); }
.wdl { display: grid; grid-template-columns: minmax(96px, 38%) 1fr; gap: 6px 10px; margin: 0; font-size: .88rem; }
.wdl dt { color: #a6b3d6; font-weight: 600; }
.wdl dd { margin: 0; }
.wsrc { display: inline-block; color: #8fa2d6; font-size: .72rem; margin-inline-start: 4px; }
.wchips { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0; }
.wchip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px 4px 6px; border-radius: 999px; border: 1px solid #2c4383; background: #12275a; color: #e8eeff; font: 500 .8rem var(--font); cursor: pointer; }
.wchip:hover { background: #1a3576; }
.wlink { background: none; border: 0; padding: 0; color: #9cc3ff; font: inherit; text-decoration: underline; cursor: pointer; }
.wnote { background: rgba(255, 200, 66, .1); border: 1px solid rgba(255, 200, 66, .35); border-radius: 10px; padding: 8px 10px; font-size: .84rem; }
.wlist-plain { padding-inline-start: 18px; margin: 4px 0; font-size: .86rem; }
.wbars { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: .82rem; }
.wbars li { display: grid; grid-template-columns: 1fr 70px 38px; gap: 6px; align-items: center; }
.wbars i { height: 8px; border-radius: 4px; background: linear-gradient(90deg, var(--c) var(--w), #1b2c5e var(--w)); }
.wbars b { text-align: end; }
.wfun { padding-inline-start: 18px; font-size: .88rem; display: grid; gap: 4px; }
.wtable { width: 100%; border-collapse: collapse; font-size: .82rem; }
.wtable th, .wtable td { border-bottom: 1px solid #24396e; padding: 4px 6px; text-align: start; }
.wquiz-head { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; align-items: baseline; }
.wquiz-count { margin: 0; font-weight: 700; color: #ffd36b; }
.wquiz-q { font-size: 1.15rem; font-weight: 700; margin: 10px 0 12px; text-align: center; }
.wquiz-q:focus { outline: none; }
.wquiz-q .wflag { box-shadow: 0 0 0 1px #fff, 0 6px 20px rgba(0, 0, 0, .5); margin-bottom: 8px; }
.wquiz-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.wquiz-opts .wbtn { justify-content: center; text-align: center; min-height: 44px; }
.wquiz-opts .wbtn.ok { background: #1f9d55; border-color: #2fd17a; }
.wquiz-opts .wbtn.ok::before { content: "✓ "; }
.wquiz-opts .wbtn.bad { background: #a33a3a; border-color: #ff5c5c; }
.wquiz-opts .wbtn.bad::before { content: "✗ "; }
.wquiz-alt summary { cursor: pointer; font-size: .84rem; margin: 6px 0; }
.wquiz-foot { display: flex; gap: 8px; margin-top: 12px; }
.wquiz-fb .wok { color: #5fe39a; font-weight: 700; }
.wquiz-fb .wbad { color: #ff8a8a; font-weight: 700; }
.wquiz-end { text-align: center; padding: 10px 0; }
.wquiz-end:focus { outline: none; }
.wquiz-big { font: 800 2.6rem/1 var(--display); color: #ffc842; margin: 6px 0; }
.wmap-sources { background: rgba(10, 22, 52, .92); border: 1px solid #24396e; padding: 12px 14px; }
.wmap-sources summary { cursor: pointer; font-weight: 700; }
.wmap-src-list p { font-size: .8rem; margin: 8px 0; }
.wmap-conts { padding-top: 20px; padding-bottom: 10px; }
.wmap-cards { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 12px; }
.wmap-card { position: relative; padding: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; cursor: pointer; background: #0a1c42; aspect-ratio: 16 / 10; }
.wmap-card img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .3s; }
.wmap-card:hover img { transform: scale(1.05); }
.wmap-card-t { position: absolute; inset: auto 0 0 0; padding: 18px 10px 8px; background: linear-gradient(transparent, rgba(4, 12, 32, .92)); color: #fff; display: flex; flex-direction: column; text-align: start; }
.wmap-card-t small { color: #c3cdf0; }
.wmap-credits { margin-top: 8px; }
.wmap-credits ul { padding-inline-start: 18px; }
@media (max-width: 1280px) { .wmap { grid-template-columns: 230px minmax(0, 1fr) 320px; } .wmap-cards { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 1100px) {
  .wmap { grid-template-columns: minmax(0, 1fr) 320px; }
  .wmap-side { position: fixed; z-index: 60; top: 0; bottom: 0; inset-inline-start: 0; width: min(320px, 86vw); max-height: none; border-radius: 0 16px 16px 0; transform: translateX(-105%); transition: transform .25s; box-shadow: 10px 0 30px rgba(0, 0, 0, .5); visibility: hidden; }
  [dir=rtl] .wmap-side { transform: translateX(105%); }
  .wmap-side.open { transform: none; visibility: visible; }
  .wmap-drawer-btn { display: inline-flex; }
}
@media (max-width: 820px) {
  .wmap { grid-template-columns: 1fr; padding: 8px; }
  .wmap-stage { height: 68vh; min-height: 380px; }
  .wmap-panel { position: fixed; z-index: 55; inset: auto 0 0 0; top: auto; max-height: 62vh; background: #0b1a40; border-top: 2px solid #4f8cff; border-radius: 18px 18px 0 0; padding: 10px; transform: translateY(105%); transition: transform .25s; box-shadow: 0 -10px 30px rgba(0, 0, 0, .5); visibility: hidden; }
  .wmap-panel.open { transform: none; visibility: visible; }
  .wmap-sheet-close { display: inline-flex; align-self: flex-end; }
  .wmap-panel .wmap-sources { display: none; }
  .wmap-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .wmap-layers { width: min(260px, calc(100% - 20px)); }
  .wmap-top { gap: 6px; }
  .wmap-search { order: 3; flex-basis: 100%; }
}
@media (prefers-reduced-motion: reduce) { .wmap-side, .wmap-panel, .wmap-card img { transition: none; } .wmap-spin { animation: none; } }