:root {
  --bg: #fff5fa;
  --bg2: #f6efff;
  --card: rgb(255 255 255 / .78);
  --card-solid: #ffffff;
  --line: #f5d3e6;
  --ink: #4a2a45;
  --muted: #8f6a88;
  --pink: #ff5fa2;
  --pink-2: #ff8cc0;
  --pink-soft: #ffe1ef;
  --lav: #a98bff;
  --lav-soft: #ece4ff;
  --mint: #2fbf8f;
  --mint-soft: #dcf7ec;
  --rose: #e5486d;
  --rose-soft: #ffe3e9;
  --gold: #ffb84d;
  --shadow: 0 10px 30px -12px rgb(255 95 162 / .35), 0 2px 6px rgb(169 139 255 / .12);
  --r: 22px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #23142a; --bg2: #1c1530; --card: rgb(47 28 56 / .82); --card-solid: #2f1c38;
    --line: #5a3560; --ink: #fbe9f5; --muted: #d2abc8; --pink-soft: #4d2343; --lav-soft: #352a5a;
    --mint-soft: #173f33; --rose-soft: #4a1d2a; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #23142a; --bg2: #1c1530; --card: rgb(47 28 56 / .82); --card-solid: #2f1c38;
  --line: #5a3560; --ink: #fbe9f5; --muted: #d2abc8; --pink-soft: #4d2343; --lav-soft: #352a5a;
  --mint-soft: #173f33; --rose-soft: #4a1d2a; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh; color: var(--ink);
  font-family: "Baloo Bhaijaan 2", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px; line-height: 1.6;
  background:
    radial-gradient(60vmax 60vmax at 100% 0%, color-mix(in oklab, var(--pink-2) 30%, transparent), transparent 60%),
    radial-gradient(50vmax 50vmax at 0% 100%, color-mix(in oklab, var(--lav) 28%, transparent), transparent 60%),
    linear-gradient(160deg, var(--bg), var(--bg2));
  background-attachment: fixed;
  padding-bottom: env(safe-area-inset-bottom);
}
button, input, select { font: inherit; color: inherit; }
b { font-weight: 700; }

/* floating hearts & sparkles */
.sky { position: fixed; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.sky span { position: absolute; bottom: -40px; font-size: 22px; opacity: .55; animation: float 16s linear infinite; }
.sky span:nth-child(odd)::before { content: "♡"; color: var(--pink); }
.sky span:nth-child(even)::before { content: "✦"; color: var(--lav); }
.sky span:nth-child(1){left:4%;animation-delay:0s}.sky span:nth-child(2){left:14%;animation-delay:-3s;font-size:16px}
.sky span:nth-child(3){left:25%;animation-delay:-7s}.sky span:nth-child(4){left:36%;animation-delay:-11s;font-size:14px}
.sky span:nth-child(5){left:48%;animation-delay:-5s}.sky span:nth-child(6){left:59%;animation-delay:-13s;font-size:18px}
.sky span:nth-child(7){left:70%;animation-delay:-2s}.sky span:nth-child(8){left:80%;animation-delay:-9s;font-size:15px}
.sky span:nth-child(9){left:89%;animation-delay:-6s}.sky span:nth-child(10){left:96%;animation-delay:-14s;font-size:13px}
@keyframes float { to { transform: translateY(-110vh) rotate(25deg); opacity: 0; } }

/* top bar */
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
  padding: 10px max(16px, env(safe-area-inset-right)) 10px max(16px, env(safe-area-inset-left));
  backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4);
  background: color-mix(in oklab, var(--bg) 70%, transparent);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 20px; }
.brand b { color: var(--pink); }
.brand small { font-weight: 500; color: var(--muted); font-size: 13px; }
.brand-ico { font-size: 24px; }
.music-btn {
  display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--card);
  border-radius: 999px; padding: 6px 14px 6px 8px; cursor: pointer; transition: transform .15s, box-shadow .2s;
}
.music-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.disc {
  width: 28px; height: 28px; border-radius: 50%;
  background: radial-gradient(circle, var(--card-solid) 0 3px, var(--pink) 4px 7px, #3a2238 8px 13px, var(--pink-2) 14px);
}
.music-btn[aria-pressed="true"] .disc { animation: spin 3s linear infinite; }
@keyframes spin { to { rotate: 360deg; } }

main { position: relative; z-index: 1; max-width: 1080px; margin: 0 auto; padding: 18px 16px 120px; }
.screen { display: none; }
.screen[data-active] { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; animation: rise .45s cubic-bezier(.2,.8,.2,1); }
.screen > *, .quiz-body > * { min-width: 0; }
html, body { overflow-x: clip; }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
  padding: clamp(16px, 3.5vw, 28px); box-shadow: var(--shadow);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.h2 { margin: 0 0 14px; font-size: 21px; }

/* hero */
.hero { text-align: center; }
.eyebrow { margin: 0; color: var(--lav); font-weight: 700; letter-spacing: .5px; direction: ltr; }
.hero h1 { margin: 6px 0 8px; font-size: clamp(28px, 6vw, 46px); line-height: 1.25; }
.grad { background: linear-gradient(90deg, var(--pink), var(--lav)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); max-width: 620px; margin: 0 auto 18px; }
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.facts div { background: var(--pink-soft); border-radius: 16px; padding: 12px 6px; display: grid; }
.facts div:nth-child(even) { background: var(--lav-soft); }
.facts b { font-size: 26px; color: var(--pink); line-height: 1.1; }
.facts div:nth-child(even) b { color: var(--lav); }
.facts span { font-size: 13px; color: var(--muted); }

/* modes */
.modes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.mode { position: relative; cursor: pointer; }
.mode input { position: absolute; opacity: 0; }
.mode > span {
  display: grid; gap: 2px; height: 100%; padding: 14px 16px; border-radius: 18px; border: 2px solid var(--line);
  background: var(--card-solid); transition: border-color .2s, transform .15s, background .2s;
}
.mode small { color: var(--muted); font-size: 13px; }
.mode:hover > span { transform: translateY(-2px); }
.mode input:checked + span { border-color: var(--pink); background: var(--pink-soft); }
.mode input:focus-visible + span { outline: 3px solid var(--lav); outline-offset: 2px; }

.domain-pick { margin-top: 12px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.domain-pick[hidden] { display: none; }
.domain-pick select { flex: 1 1 220px; min-width: 0; width: 100%; max-width: 100%; text-overflow: ellipsis; padding: 10px 12px; border-radius: 14px; border: 2px solid var(--line); background: var(--card-solid); }

.toggle-row { margin: 16px 0; }
.switch { display: flex; gap: 12px; align-items: flex-start; cursor: pointer; }
.switch input { position: absolute; opacity: 0; }
.slider { flex: none; width: 48px; height: 28px; border-radius: 99px; background: var(--line); position: relative; transition: background .2s; margin-top: 2px; }
.slider::after { content: ""; position: absolute; top: 3px; inset-inline-start: 3px; width: 22px; height: 22px; border-radius: 50%; background: #fff; box-shadow: 0 2px 4px rgb(0 0 0 / .2); transition: inset-inline-start .2s; }
.switch input:checked + .slider { background: var(--pink); }
.switch input:checked + .slider::after { inset-inline-start: 23px; }
.switch input:focus-visible + .slider { outline: 3px solid var(--lav); outline-offset: 2px; }
.switch-text { display: grid; }
.switch-text small { color: var(--muted); font-size: 13px; }

/* buttons */
.btn {
  border: 0; border-radius: 999px; padding: 12px 22px; cursor: pointer; font-weight: 700;
  transition: transform .12s, box-shadow .2s, filter .2s; min-height: 46px;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(1px) scale(.98); }
.btn:focus-visible { outline: 3px solid var(--lav); outline-offset: 2px; }
.btn:disabled { opacity: .45; pointer-events: none; }
.btn.primary { color: #fff; background: linear-gradient(135deg, var(--pink), var(--lav)); box-shadow: 0 8px 20px -8px var(--pink); }
.btn.soft { background: var(--lav-soft); color: var(--ink); }
.btn.ghost { background: var(--card-solid); border: 1px solid var(--line); }
.btn.danger { background: var(--rose-soft); color: var(--rose); }
.btn.big { width: 100%; font-size: 20px; padding: 16px; }
.btn.sm { padding: 6px 14px; min-height: 36px; font-size: 15px; }

/* domain list */
.domain-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.domain-list li { display: grid; grid-template-columns: 1fr auto; gap: 4px 10px; align-items: center; }
.domain-list .bar { grid-column: 1 / -1; height: 10px; border-radius: 99px; background: var(--pink-soft); overflow: hidden; }
.domain-list .bar i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--pink-2), var(--lav)); }
.domain-list small { color: var(--muted); }
.note { color: var(--muted); font-size: 14px; background: var(--lav-soft); border-radius: 14px; padding: 10px 14px; margin: 14px 0 0; }

.hist { margin-top: 14px; }
.hist h3 { margin: 0 0 8px; font-size: 17px; }
.hist ol { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.hist li { display: flex; justify-content: space-between; gap: 10px; padding: 8px 12px; border-radius: 12px; background: var(--card-solid); border: 1px solid var(--line); font-size: 14px; }
.hist .ok { color: var(--mint); font-weight: 700; } .hist .no { color: var(--rose); font-weight: 700; }

/* quiz */
.quiz-head { position: sticky; top: 62px; z-index: 10; padding: 12px 16px; }
.qh-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.pill { background: var(--pink-soft); color: var(--pink); font-weight: 800; padding: 4px 14px; border-radius: 99px; direction: ltr; }
.timer { font-variant-numeric: tabular-nums; font-weight: 800; font-size: 22px; direction: ltr; }
.timer.warn { color: var(--rose); animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .55; } }
.progress { margin-top: 10px; height: 8px; border-radius: 99px; background: var(--pink-soft); overflow: hidden; }
.progress span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--pink), var(--lav)); transition: width .3s; border-radius: inherit; }
.progress { direction: ltr; }

.quiz-body { display: grid; grid-template-columns: 1fr 260px; gap: 18px; align-items: start; }
.qcard { text-align: left; container-type: inline-size; }
.q-meta { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.dtag { font-size: 13px; font-weight: 700; padding: 3px 12px; border-radius: 99px; background: var(--lav-soft); color: var(--lav); }
.flag { border: 1px solid var(--line); background: var(--card-solid); border-radius: 99px; padding: 3px 12px; cursor: pointer; font-size: 14px; }
.flag[aria-pressed="true"] { background: var(--gold); border-color: var(--gold); color: #4a2a00; }
.q-text { font-size: clamp(18px, 2.4vw, 22px); line-height: 1.5; margin: 14px 0 6px; font-weight: 600; }
.q-hint { margin: 0 0 6px; color: var(--pink); font-weight: 700; }
.options { display: grid; gap: 10px; margin-top: 12px; }
.opt {
  display: flex; gap: 12px; align-items: flex-start; text-align: left; width: 100%; cursor: pointer;
  padding: 14px 16px; border-radius: 16px; border: 2px solid var(--line); background: var(--card-solid);
  transition: border-color .15s, background .15s, transform .12s; font-size: 16px; line-height: 1.45;
}
.opt:hover { border-color: var(--pink-2); transform: translateX(3px); }
.opt:focus-visible { outline: 3px solid var(--lav); outline-offset: 2px; }
.opt .key { flex: none; width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center; font-weight: 800; background: var(--pink-soft); color: var(--pink); font-size: 14px; }
.opt[aria-checked="true"] { border-color: var(--pink); background: var(--pink-soft); }
.opt[aria-checked="true"] .key { background: var(--pink); color: #fff; }
.opt.correct { border-color: var(--mint); background: var(--mint-soft); }
.opt.correct .key { background: var(--mint); color: #fff; }
.opt.wrong { border-color: var(--rose); background: var(--rose-soft); }
.opt.wrong .key { background: var(--rose); color: #fff; }
.opt.locked { cursor: default; transform: none; }
.feedback { margin-top: 14px; padding: 12px 16px; border-radius: 16px; background: var(--lav-soft); font-size: 15px; }
.feedback.good { background: var(--mint-soft); } .feedback.bad { background: var(--rose-soft); }
.feedback b { display: block; margin-bottom: 2px; }

.navpanel h3 { margin: 0 0 6px; font-size: 17px; }
.legend { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.lg { width: 12px; height: 12px; border-radius: 4px; display: inline-block; }
.lg.a { background: var(--pink-2); } .lg.f { background: var(--gold); } .lg.c { outline: 2px solid var(--lav); background: var(--card-solid); }
.navgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 6px; direction: ltr; max-height: 52vh; overflow: auto; padding: 3px; }
.navgrid button { aspect-ratio: 1; border-radius: 10px; border: 1px solid var(--line); background: var(--card-solid); cursor: pointer; font-size: 13px; font-weight: 700; position: relative; padding: 0; }
.navgrid button.ans { background: var(--pink-2); color: #fff; border-color: transparent; }
.navgrid button.flg::after { content: ""; position: absolute; top: 3px; right: 3px; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); }
.navgrid button.cur { outline: 3px solid var(--lav); outline-offset: 1px; }
.navgrid button.ok { background: var(--mint); color: #fff; } .navgrid button.ko { background: var(--rose); color: #fff; }

.quiz-actions {
  position: fixed; inset-inline: 0; bottom: 0; z-index: 15; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: color-mix(in oklab, var(--bg) 80%, transparent); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
}
#quiz:not([data-active]) .quiz-actions { display: none; }

/* results */
.result-card { text-align: center; display: grid; justify-items: center; gap: 14px; }
.badge { font-size: 22px; font-weight: 800; padding: 6px 22px; border-radius: 99px; }
.badge.pass { background: var(--mint-soft); color: var(--mint); } .badge.fail { background: var(--rose-soft); color: var(--rose); }
.ring {
  --p: 0; width: min(220px, 60vw); aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center;
  background: conic-gradient(var(--ring-c, var(--pink)) calc(var(--p) * 1%), var(--pink-soft) 0);
  transition: --p 1.2s;
}
@property --p { syntax: "<number>"; inherits: false; initial-value: 0; }
.ring-in { width: 76%; aspect-ratio: 1; border-radius: 50%; background: var(--card-solid); display: grid; place-content: center; }
.ring-in b { font-size: 44px; line-height: 1; direction: ltr; }
.ring-in small { color: var(--muted); }
.res-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; width: 100%; max-width: 560px; }
.res-stats div { background: var(--lav-soft); border-radius: 16px; padding: 10px; display: grid; }
.res-stats b { font-size: 24px; direction: ltr; }
.res-stats span { font-size: 13px; color: var(--muted); }
.res-msg { margin: 0; max-width: 560px; color: var(--muted); }
.bars { display: grid; gap: 14px; }
.bars .row { display: grid; grid-template-columns: 1fr auto; gap: 4px 10px; }
.bars .track { grid-column: 1 / -1; height: 12px; border-radius: 99px; background: var(--pink-soft); overflow: hidden; direction: ltr; }
.bars .track i { display: block; height: 100%; border-radius: inherit; width: 0; transition: width 1s cubic-bezier(.2,.8,.2,1); }
.bars small { color: var(--muted); }
.result-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }

.review-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.filters { display: flex; gap: 6px; }
.chip { border: 1px solid var(--line); background: var(--card-solid); border-radius: 99px; padding: 4px 14px; cursor: pointer; }
.chip[aria-selected="true"] { background: var(--pink); color: #fff; border-color: var(--pink); }
.rv { border: 1px solid var(--line); border-radius: 18px; padding: 14px 16px; margin-top: 12px; background: var(--card-solid); }
.rv-top { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 13px; }
.rv-top .st { font-weight: 800; padding: 2px 10px; border-radius: 99px; }
.rv-top .st.ok { background: var(--mint-soft); color: var(--mint); } .rv-top .st.ko { background: var(--rose-soft); color: var(--rose); }
.rv h4 { margin: 8px 0; font-size: 16px; font-weight: 600; }
.rv ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.rv li { padding: 6px 10px; border-radius: 10px; font-size: 15px; }
.rv li.c { background: var(--mint-soft); } .rv li.x { background: var(--rose-soft); text-decoration: line-through; }
.rv li.c::before { content: "✓ "; color: var(--mint); font-weight: 800; } .rv li.x::before { content: "✗ "; color: var(--rose); font-weight: 800; }
.rv .ex { margin: 8px 0 0; font-size: 14px; color: var(--muted); }

/* dialog */
dialog { border: 0; border-radius: 24px; padding: 0; background: var(--card-solid); color: var(--ink); box-shadow: var(--shadow); width: min(420px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(74 42 69 / .35); backdrop-filter: blur(4px); }
.dlg { padding: 22px; text-align: center; }
.dlg h3 { margin: 0 0 6px; } .dlg p { color: var(--muted); margin: 0 0 16px; }
.dlg-actions { display: flex; gap: 10px; justify-content: center; }

/* music player */
.player {
  position: fixed; z-index: 30; inset-inline-start: 16px; bottom: 84px; width: 240px;
  background: var(--card-solid); border: 1px solid var(--line); border-radius: 20px; padding: 10px; box-shadow: var(--shadow);
}
.player[hidden] { display: block; visibility: hidden; pointer-events: none; opacity: 0; translate: 0 10px; }
.player { transition: opacity .25s, translate .25s; }
.player-head { display: flex; justify-content: space-between; align-items: center; font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.player-head button { border: 0; background: var(--pink-soft); border-radius: 50%; width: 26px; height: 26px; cursor: pointer; }
.player-frame { border-radius: 14px; overflow: hidden; aspect-ratio: 16/9; background: #000; }
.player-frame iframe, .player-frame > div { width: 100%; height: 100%; display: block; }
#vol { width: 100%; margin-top: 8px; accent-color: var(--pink); }

.toast {
  position: fixed; z-index: 40; left: 50%; top: 76px; translate: -50% -20px; opacity: 0; pointer-events: none;
  background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 99px; font-size: 15px; transition: .3s; max-width: calc(100vw - 32px); text-align: center;
}
.toast.show { opacity: 1; translate: -50% 0; }
#confetti { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 50; }

/* tablet / mobile */
@media (max-width: 860px) {
  .quiz-body { grid-template-columns: 1fr; }
  .navpanel { display: none; }
  .navpanel.open { display: block; position: fixed; inset: auto 12px 78px 12px; z-index: 25; max-height: 60vh; overflow: auto; }
}
@media (min-width: 861px) { #navToggle { display: none; } }
@media (max-width: 560px) {
  body { font-size: 16px; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .modes { grid-template-columns: 1fr; }
  .quiz-actions .btn { flex: 1 1 40%; padding: 10px 12px; }
  .res-stats b { font-size: 20px; }
  .music-label { display: none; }
  .music-btn { padding: 6px; }
  .player { inset-inline: 12px auto; width: min(260px, calc(100vw - 24px)); }
}
@container (max-width: 420px) { .opt { padding: 12px; font-size: 15px; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .sky { display: none; }
}