:root{--tone1:var(--sky);--tone1-soft:var(--sky-soft);--tone2:var(--mascot-2);--tone2-soft:var(--sage-soft);--tone3:var(--butter);--tone3-soft:var(--butter-soft);--tone4:var(--pink);--tone4-soft:var(--pink-soft);--tone0:var(--ink-soft);--tone0-soft:var(--paper-deep);--ink-faint:var(--paper-deep);--gold:var(--butter);--silver:var(--sky);--bronze:var(--pink-soft);--radius:18px;--font:var(--font-ui);--font-han:"Kaiti SC", "STKaiti", "KaiTi", "Noto Serif SC", "PingFang SC", serif}.tone-cards{grid-template-columns:repeat(2,1fr);gap:12px;margin:14px 0;display:grid}.tone-cards.n5{grid-template-columns:repeat(3,1fr)}.tone-card{min-height:132px;min-width:var(--tap);border:5px solid var(--mascot-2);border-radius:var(--radius);background:var(--card);color:var(--ink);cursor:pointer;touch-action:manipulation;box-shadow:0 4px 0 var(--ink-faint);align-content:center;justify-items:center;gap:2px;padding:10px 8px;display:grid}.tone-card.tone-1{border-color:var(--tone1);background:var(--tone1-soft)}.tone-card.tone-2{border-color:var(--tone2);background:var(--tone2-soft)}.tone-card.tone-3{border-color:var(--tone3);background:var(--tone3-soft)}.tone-card.tone-4{border-color:var(--tone4);background:var(--tone4-soft)}.tone-card.tone-0{border-color:var(--tone0);background:var(--tone0-soft)}.tone-card:active{box-shadow:0 2px 0 var(--ink-faint);transform:translateY(2px)}.tone-card:disabled,.tone-card.off{opacity:.45;cursor:default}.tone-card:focus-visible{outline:4px solid var(--pink-deep);outline-offset:2px}.tone-mark{font-family:var(--font-head);font-size:2.4rem;font-weight:800;line-height:1}.tone-glyph{width:90px;height:42px}.tone-name{font-family:var(--font-han);flex-direction:column;align-items:center;font-size:1.1rem;font-weight:800;line-height:1.1;display:flex}.tone-name .tone-en{font-family:var(--font-ui);color:var(--ink-soft);font-size:.85rem}.tone-hint{color:var(--ink-soft);text-align:center;font-size:.8rem}.cpinyin{font-family:var(--font-han);font-size:2.2rem;font-weight:800}.tone-text.tone-1{color:var(--tone1)}.tone-text.tone-2{color:var(--tone2)}.tone-text.tone-3{color:var(--tone3)}.tone-text.tone-4{color:var(--tone4)}.tone-text.tone-0{color:var(--ink-soft)}.cpinyin .tone-text+.tone-text{margin-left:.3em}.reveal{text-align:center;padding:8px 0}.reveal-word{font-family:var(--font-han);margin:4px 0;font-size:4rem;font-weight:800}.reveal-en{color:var(--ink-soft);margin:2px 0;font-weight:700}.you-tones{gap:10px;margin-top:6px;display:inline-flex}.you-tones .mark{border-radius:50%;place-items:center;width:40px;height:40px;font-size:1.6rem;font-weight:900;display:grid}.you-tones .mark.ok{background:var(--sage-soft);color:var(--ink)}.you-tones .mark.no{background:var(--pink-soft);color:var(--ink)}.tally{justify-content:center;margin-top:12px}.tally-chip{font-family:var(--font-han);border:3px solid var(--ink-faint);border-radius:999px;align-items:center;gap:4px;padding:6px 12px;font-size:1.2rem;font-weight:800;display:inline-flex}.tally-chip.tone-1{border-color:var(--tone1);background:var(--tone1-soft)}.tally-chip.tone-2{border-color:var(--tone2);background:var(--tone2-soft)}.tally-chip.tone-3{border-color:var(--tone3);background:var(--tone3-soft)}.tally-chip.tone-4{border-color:var(--tone4);background:var(--tone4-soft)}.tally-chip.tone-0{border-color:var(--tone0);background:var(--tone0-soft)}.tally-chip .tally-count{font-family:var(--font-ui);color:var(--ink);font-size:.9rem}.stage-center{text-align:center;justify-items:center;gap:8px;display:grid}.big-prompt{font-family:var(--font-head);margin:8px 0;font-size:2rem;font-weight:800}.sound-btn{white-space:nowrap}*{box-sizing:border-box}html,body{background:var(--paper);color:var(--ink);font-family:var(--font);margin:0;padding:0}body{-webkit-tap-highlight-color:transparent;min-height:100vh}#app{max-width:720px;margin:0 auto;padding:0 16px 16px}#app.wide{max-width:1100px}h1{margin:8px 0;font-size:2rem}h2{margin:16px 0 8px;font-size:1.4rem}p{line-height:1.5}a{color:var(--ink)}.brand{align-items:center;gap:12px;display:flex}.brand img{object-fit:contain;flex:none;width:64px;height:64px}.nowrap{white-space:nowrap}.brand .sub{color:var(--ink-soft);margin:0}.card{background:var(--card);border-radius:var(--radius);box-shadow:0 2px 0 var(--ink-faint);margin:16px 0;padding:20px}.btn{border-radius:var(--radius);width:100%;font-size:1.25rem}.btn.small{width:auto;font-size:1.1rem}label{margin:12px 0 6px;font-weight:700;display:block}input,textarea,select{width:100%;min-height:var(--tap);font:inherit;border:3px solid var(--mascot);border-radius:var(--radius);background:var(--card);color:var(--ink);padding:12px 16px;font-size:1.25rem}textarea{resize:vertical;min-height:140px}input.code{text-transform:uppercase;letter-spacing:.4em;text-align:center;font-size:2rem;font-weight:900}.row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.row>*{flex:1}.muted{color:var(--ink-soft)}.notice{background:var(--sage-soft);border-radius:var(--radius);padding:12px 16px;font-weight:700}.notice.warn{background:var(--butter-soft);border:3px dashed var(--pink)}.error{color:var(--ink);background:var(--pink-soft);border-radius:12px;padding:8px 12px;font-weight:800}.error:empty{display:none}.chips{flex-wrap:wrap;gap:8px;display:flex}.chip{font-family:var(--font-han);background:var(--card);border:2px solid var(--mascot);border-radius:12px;place-items:center;min-width:56px;height:56px;padding:0 10px;font-size:1.8rem;display:grid}.roomcode{letter-spacing:.2em;text-align:center;margin:0;font-size:4.5rem;font-weight:900}.joinlink{text-align:center;word-break:break-all;font-size:1.1rem}.roomcode,.countdown{font-family:var(--font-head)}.momo{object-fit:contain;transform-origin:50% 85%;width:128px;height:128px;margin:8px auto;display:block}.momo.bounce{animation:1.2s ease-in-out infinite bounce}.momo.tilt{animation:2.4s ease-in-out infinite tilt}.momo.small{width:88px;height:88px}.winners-head{align-items:center;gap:16px;display:flex}.winners-head .momo{width:96px;height:96px;margin:0}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)rotate(-4deg)}}@keyframes tilt{0%,to{transform:rotate(-8deg)}50%{transform:rotate(8deg)}}@media (prefers-reduced-motion:reduce){.momo,.cheer .momo{animation:none!important}}.race-head{justify-content:space-between;align-items:center;gap:12px;font-size:1.2rem;font-weight:800;display:flex}.timer{background:var(--ink);color:var(--paper);font-variant-numeric:tabular-nums;white-space:nowrap;border-radius:999px;padding:6px 16px}.cheer{background:var(--paper);z-index:10;text-align:center;place-items:center;display:grid;position:fixed;inset:0}.cheer .momo{width:200px;height:200px;animation:.5s ease-out pop,1.2s ease-in-out .5s infinite bounce}.cheer .big{font-family:var(--font-head);color:var(--ink);margin:0;font-size:3rem;font-weight:800}.cheer .points{font-family:var(--font-head);margin:0;font-size:2rem;font-weight:800}@keyframes pop{0%{transform:scale(.4)}70%{transform:scale(1.15)}to{transform:scale(1)}}.countdown{text-align:center;color:var(--pink-deep);margin:32px 0;font-size:8rem;font-weight:800}.prompt{text-align:center;min-height:2em;margin:12px 0 0;font-size:1.3rem;font-weight:800}.stage{grid-template-columns:minmax(0,3fr) minmax(260px,2fr);align-items:start;gap:24px;display:grid}.stage-left{min-width:0}@media (width<=800px){.stage{grid-template-columns:1fr}}.levels>*{flex:0 auto}summary.tap-summary{min-height:var(--tap);cursor:pointer;border-radius:12px;align-items:center;padding:0 8px;font-weight:700;display:flex}summary.tap-summary:focus-visible{outline:3px solid var(--pink-deep);outline-offset:2px}summary.tap-summary::-webkit-details-marker{display:none}summary.tap-summary:before{content:"▸";margin-right:8px}details[open]>summary.tap-summary:before{content:"▾"}.robots-divider{border-top:3px dashed var(--ink-faint);color:var(--ink-soft);margin:16px 0 4px;padding-top:12px;font-weight:800}.board{margin:0;padding:0;list-style:none}.lane{background:var(--card);border-radius:var(--radius);grid-template-columns:48px 1fr 104px;align-items:center;gap:12px;margin:8px 0;padding:10px 14px;display:grid}.lane .place{text-align:center;background:var(--paper-deep);border-radius:50%;place-items:center;width:44px;height:44px;font-size:1.6rem;font-weight:900;display:grid}.lane .place.p1{background:var(--gold)}.lane .place.p2{background:var(--silver)}.lane .place.p3{background:var(--bronze)}.lane .name{font-size:1.3rem;font-weight:800}.tag{background:var(--mascot);vertical-align:middle;border-radius:999px;margin:2px 6px 2px 0;padding:4px 12px;font-size:.9rem;font-weight:700;display:inline-block}.lane .tag{margin-left:6px;padding:2px 8px;font-size:.8rem}.wide .lane{grid-template-columns:56px 1fr 120px;padding:12px 16px}.wide .lane .place{width:56px;height:56px;font-size:2rem}.wide .lane .name{font-size:1.8rem}.block{display:block}.status{text-align:center;background:var(--paper-deep);border-radius:999px;padding:6px 10px;font-weight:900}.status.answered{background:var(--sage-soft)}.status.thinking{background:var(--butter-soft)}.stepper{align-items:center;gap:8px;display:flex}.stepper .val{text-align:center;min-width:64px;font-size:1.5rem;font-weight:900}