.song-panel{padding:20px 24px;margin-top:18px;border:1px solid var(--line);border-radius:14px;background:var(--surface);font-size:15px}.song-panel p{margin:0 0 8px}.song-panel summary{cursor:pointer;font-weight:800;color:var(--action);min-height:44px;padding:8px 0}.song-panel a{display:inline-block;color:var(--action);margin-top:8px}.song-panel audio{display:block;width:100%;max-width:620px;margin:12px 0}.game:has(#celebration.playing) .stage>div>svg{animation:bone-dance .65s ease-in-out infinite alternate;transform-origin:50% 80%}@keyframes bone-dance{from{transform:rotate(-1.5deg)}to{transform:rotate(1.5deg)}}:root{color-scheme:light;--bg:#edf3fa;--surface:#fff;--ink:#142440;--muted:#465772;--stage:#101d39;--accent:#46d9ff;--action:#075cab;--highlight:#ec238e;--line:#c3d2e4;--success:#156344;--radius:20px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.55 system-ui,-apple-system,sans-serif}button,select{font:inherit;font-weight:700;min-height:48px;padding:10px 16px;color:var(--ink);background:var(--surface);border:2px solid var(--line);border-radius:11px;cursor:pointer}button:hover{border-color:var(--action)}button:disabled{cursor:default;opacity:.7}button:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--highlight);outline-offset:4px}button[aria-pressed=true],button.primary{background:var(--action);border-color:var(--action);color:#fff}button[aria-pressed=true]{box-shadow:inset 0 -3px 0 #00386d}[hidden]{display:none!important}header{max-width:1240px;margin:auto;padding:23px 30px;display:flex;justify-content:space-between;gap:16px;align-items:center}.brand{font-size:24px;letter-spacing:-.8px;font-weight:900;text-decoration:none;color:var(--ink)}header span{font-size:14px;color:var(--muted)}main{max-width:1180px;padding:0 24px;margin:auto}.intro{background:var(--stage);border-top:5px solid var(--accent);border-radius:var(--radius);color:#fff;display:grid;grid-template-columns:1fr 200px;align-items:center;gap:36px;padding:32px 36px}.intro img{width:200px;height:200px;border-radius:15px;border:2px solid #5ebadb}.intro p{max-width:740px;margin:12px 0}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.09em;text-transform:uppercase}.intro .eyebrow{color:var(--accent)}h1{font-size:clamp(30px,3.9vw,46px);line-height:1.1;letter-spacing:-1.5px;margin:12px 0 20px;text-wrap:balance}h2{font-size:25px;line-height:1.2;letter-spacing:-.5px;margin:0 0 16px;text-wrap:balance}h3{font-size:22px;margin:0 0 8px}.journey{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:32px 12px 18px}.journey p{font-size:15px;margin:12px 0}.number{display:inline-grid;place-items:center;width:34px;height:34px;margin-right:8px;background:var(--stage);color:var(--accent);border-radius:50%;font-size:19px}.test-option{margin-top:16px}.test-option button{font-size:16px;text-align:left;width:100%}.test-option p{margin:6px 2px 0;color:var(--muted);font-size:14px}.reward-note{padding:16px 20px;border-left:4px solid var(--highlight);background:var(--surface);border-radius:0 12px 12px 0;font-size:15px;margin:14px 0 28px}.toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:14px;font-size:15px}.toolbar select{max-width:100%;min-width:0}.toolbar #mode-label{margin-left:auto;font-weight:800;color:var(--action)}.game{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface);box-shadow:0 12px 28px #1123450a}.stage{background:var(--stage);color:#fff;padding:20px 24px;min-width:0}.view-controls{display:flex;gap:8px;flex-wrap:wrap}.view-controls button{background:transparent;border-color:#7087a6;color:#fff;font-size:14px;flex:1;padding:8px}.view-controls button[aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:var(--stage);box-shadow:none}#stage-label{font-size:15px;font-weight:700;text-align:center;min-height:24px;margin:18px 0 8px}#diagram,#bone-picture{height:490px;display:grid;place-items:center}#diagram>svg,#bone-picture>svg{width:100%;height:100%;overflow:hidden!important}#diagram .selected,#diagram .selected *{fill:var(--highlight)!important;stroke:#fff!important;stroke-width:1.1px!important;stroke-linejoin:round!important}#bone-picture{background:#e6f4ff;border:2px solid var(--accent);border-radius:16px;padding:22px}#orientation{font-size:13px;color:#cedbec;text-align:center;margin:12px 0 0}.task{padding:28px;min-width:0}.task .eyebrow{color:var(--action);margin:0 0 10px}.task h2{font-size:29px}#instruction{font-size:17px;margin:0 0 12px}#pronunciation{font-size:15px;color:var(--muted);min-height:0}.choices{display:grid;gap:10px;margin:20px 0}.choices button{text-align:left;position:relative;line-height:1.35}.choices button[aria-pressed=true]::after{content:' ✓';float:right}.choices button.correct{border-color:var(--success);background:#e6f5ed;color:#104b34;opacity:1}.choices button.correct::after{content:' ✓';float:right}#feedback{min-height:28px;font-weight:650;margin:16px 0}#progress{padding:14px 16px;background:#eaf5fc;border-radius:12px;font-size:15px;font-weight:800}.dots{display:flex;gap:8px;margin-top:9px}.dots i{height:10px;flex:1;border:1px solid #819ab9;background:#fff;border-radius:5px}.dots i.filled{background:var(--action);border-color:var(--action)}#celebration{border-top:3px solid var(--accent);background:var(--stage);color:white;padding:20px;margin-top:22px;border-radius:12px}#celebration p{font-size:15px}#music-status{min-height:4.7em}#celebration button{font-size:14px}#celebration.playing{animation:celebrate-in .35s ease-out}@keyframes celebrate-in{from{transform:translateY(8px);opacity:.7}to{transform:none;opacity:1}}.guide{font-size:14px;margin:30px 0;padding:20px;border:1px solid var(--line);border-radius:14px}.guide summary{font-weight:800;cursor:pointer;min-height:28px}.guide a{color:var(--action)}footer{max-width:1180px;margin:auto;padding:0 24px 35px;color:var(--muted);font-size:14px}#workspace{scroll-margin-top:20px}audio{display:none}@media(max-width:760px){body{font-size:16px}header{padding:18px 18px}header span{display:none}main{padding:0 14px}.intro{grid-template-columns:1fr 82px;gap:12px;padding:23px 20px}.intro img{width:82px;height:82px;align-self:start}.intro .eyebrow{display:none}.intro h1{font-size:29px;letter-spacing:-1px;margin:0 0 15px}.intro p{font-size:14px}.intro>div{display:contents}.intro h1{grid-column:1;grid-row:1}.intro img{grid-column:2;grid-row:1}.intro p{grid-column:1/-1;margin:0}.journey{grid-template-columns:1fr;gap:28px;padding:26px 6px 12px}.journey h2{font-size:24px}.reward-note{margin-bottom:22px}.toolbar{gap:8px}.toolbar label{width:100%;font-weight:800}.toolbar select{flex:1;font-size:14px;padding:10px}.toolbar #reset{font-size:14px}.toolbar #mode-label{width:100%;margin:4px 0;font-size:14px}.game{grid-template-columns:1fr}.stage{padding:18px}.task{padding:24px 20px}.task h2{font-size:26px}#diagram,#bone-picture{height:355px}#stage-label{margin-top:14px}#orientation{font-size:12px}.view-controls button{font-size:13px}footer{padding:0 20px 28px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}