:root{color-scheme:dark;--bg:#101413;--panel:#1a201e;--panel2:#202824;--text:#eff3ed;--muted:#a2afa7;--line:#344138;--lime:#c7f9a0;--ink:#172114;--warn:#ffc797;font-family:Inter,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-size:16px;line-height:1.65}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.5}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--lime);outline-offset:5px}[hidden]{display:none!important}.shell{max-width:1180px;margin:auto;padding:0 40px}.header{display:flex;align-items:center;gap:24px;min-height:104px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:9px;font-size:24px;letter-spacing:.1em;font-weight:650}.brand-mark{color:var(--lime);font-size:32px}.demo{font-size:11px;font-weight:500;letter-spacing:.09em;border:1px solid var(--line);border-radius:4px;margin-left:6px;padding:1px 5px;color:var(--muted)}.header-note{margin-left:auto;font-size:14px;color:var(--muted)}.header #leave{margin-left:auto}.view{padding:36px 0}.intro{padding:14px 0 36px}.eyebrow,.step-label{display:block;font-size:12px;letter-spacing:.12em;font-weight:550;color:var(--muted)}h1,h2,p{margin:0}h1{font-size:clamp(38px,5.3vw,62px);line-height:1.3;letter-spacing:-.04em;font-weight:560}.intro h1{margin:16px 0}.intro p{color:var(--muted)}.entry-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.entry{padding:30px 32px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.computer-entry{background:var(--lime);color:var(--ink);border-color:var(--lime)}.computer-entry .step-label,.computer-entry .fine{color:#435a36}.entry h2{font-size:26px;letter-spacing:-.03em;margin:16px 0 12px;font-weight:550}.entry p{font-size:16px;opacity:.8;min-height:65px;margin-bottom:24px}.button{border:1px solid transparent;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;gap:28px;padding:13px 22px;min-height:50px;font-weight:550;white-space:nowrap;transition:background .15s,transform .15s}.button:active{transform:translateY(1px)}.primary{background:var(--lime);color:var(--ink)}.computer-entry .primary{background:var(--ink);color:var(--lime)}.secondary{background:#334237;color:var(--text)}.ghost{background:transparent;border-color:var(--line);color:var(--text)}.small{min-height:40px;padding:8px 15px;font-size:14px}.fine{font-size:13px;color:var(--muted)}.entry>.fine{display:block;margin-top:12px}.join-row{display:flex;gap:10px}.join-row input{width:100%;min-width:0;border:1px solid #46534b;background:var(--bg);color:var(--text);border-radius:8px;padding:12px 16px;font-size:18px;letter-spacing:.12em}.join-row input::placeholder{font-size:15px;letter-spacing:0;color:var(--muted)}.home-footer{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;margin:25px 0 10px}.home-footer b{font-weight:500;color:var(--text);margin-left:16px}.footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);color:var(--muted);font-size:12px;letter-spacing:.04em;padding:22px 0 26px;margin-top:12px}.room-strip{display:flex;gap:30px;align-items:center;padding:0 0 28px}.room-code{font-size:48px;line-height:1.2;letter-spacing:.13em;font-variant-numeric:tabular-nums;font-weight:500;margin-top:8px;color:var(--lime)}.room-instruction{border-left:1px solid var(--line);padding-left:28px;font-size:14px}.room-instruction p{color:var(--muted);margin-top:4px}.text-button{background:transparent;border:0;color:var(--lime);font-size:14px;padding:8px 0;min-height:40px;text-decoration:underline;text-underline-offset:4px}.qr{margin-left:auto;border-radius:7px;background:#fff;padding:5px}.stage{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:30px 32px}.stage-top{display:flex;justify-content:space-between;gap:15px;align-items:center}.stage h1{font-size:27px;letter-spacing:-.02em;margin-top:6px}.stage h1 span{font-size:13px;color:var(--muted);font-weight:400;letter-spacing:0;margin-left:12px}.status{display:inline-flex;align-items:center;gap:8px;font-size:13px;background:#2c352f;border-radius:20px;padding:5px 12px;white-space:nowrap;color:#d6e6d6}.status.ready{background:#334732;color:var(--lime)}.stage-center{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;min-height:245px}.note-orbit{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;height:220px}.current-note{font-size:80px;font-weight:450;line-height:1.1;letter-spacing:-.06em;z-index:1;pointer-events:none}.note-caption{font-size:13px;color:var(--muted);margin-top:16px;z-index:1;pointer-events:none}#baton-scope{position:absolute;width:100%;height:100%;overflow:visible}.scope-grid{fill:none;stroke:var(--line);stroke-width:.7}#motion-path{fill:none;stroke:var(--lime);stroke-width:2;stroke-linecap:round;opacity:.6}#motion-dot{fill:var(--lime)}.stage-help h2{font-size:23px;font-weight:500;margin:10px 0}.stage-help p{font-size:14px;color:var(--muted)}.beat-dots{display:flex;gap:8px;margin-top:18px}.beat-dots span{display:grid;place-items:center;width:29px;height:29px;border-radius:50%;font-size:12px;background:#2f3a32;color:var(--muted)}.beat-dots span.active{background:var(--lime);color:var(--ink)}.score-head{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:10px}.score{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:5px}.score-note{display:flex;align-items:center;justify-content:center;gap:12px;min-height:60px;border-radius:6px;background:#28322b;color:#aebcac;font-size:22px;transition:background .15s}.score-note.played{background:#344c31;color:#d1e8c3}.score-note.active{background:var(--lime);color:var(--ink)}.score-note small{font-size:13px;opacity:.75}.song-progress{height:3px;background:#303c33;margin:22px 0 18px;overflow:hidden;border-radius:3px}.song-progress>div{height:100%;background:var(--lime);width:0;transition:width .2s}.stage-bottom{display:flex;align-items:center;gap:20px}#tempo{font-size:25px;font-variant-numeric:tabular-nums}#tempo small{font-size:12px;color:var(--muted)}.host-actions{margin-left:auto;display:flex;gap:10px}.sound-row{display:flex;align-items:center;gap:15px;margin-top:20px;font-size:13px;color:var(--muted)}input[type=range]{accent-color:var(--lime);height:25px;max-width:140px}.phone-view{max-width:460px;margin:auto}.phone-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.phone-card{border:1px solid var(--line);border-radius:16px;background:var(--panel);padding:28px;text-align:center}.phone-card .step-label{color:var(--lime)}.phone-card h1{font-size:29px;margin:18px 0 14px;letter-spacing:-.03em}.phone-card p{font-size:15px;color:var(--muted)}.cal-visual{height:175px;display:flex;align-items:center;justify-content:center;flex-direction:column}.cal-visual #cal-number{font-size:65px;color:var(--lime);line-height:1.2;font-variant-numeric:tabular-nums}.cal-visual #cal-label{font-size:13px;color:var(--muted);margin-top:8px}.cal-progress{height:3px;background:#354237;border-radius:3px;margin:0 0 25px}.cal-progress>div{height:100%;width:0;background:var(--lime);transition:width .15s}.full{width:100%}.phone-card>.text-button{display:block;margin:14px auto 0}.beat-pad{border:1px solid #57734a;background:#23331f;color:var(--lime);border-radius:50%;width:208px;height:208px;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:28px auto 24px;box-shadow:0 0 0 10px #212b21;touch-action:manipulation;transition:background .1s,transform .1s}.beat-pad>span{font-size:66px;line-height:1.1}.beat-pad small{font-size:12px;margin-top:12px;color:#b2c9a6}.beat-pad.pulse{background:var(--lime);color:var(--ink);transform:scale(.97)}.beat-pad.pulse small{color:var(--ink)}.phone-stats{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}.sensitivity{display:flex;flex-wrap:wrap;text-align:left;justify-content:space-between;margin-top:25px;font-size:13px;color:var(--muted);gap:5px}.sensitivity input{width:100%;max-width:none}.phone-hint{text-align:center;font-size:13px;color:var(--muted);margin-top:16px}.notice{background:#30271f;border:1px solid #756044;color:var(--warn);border-radius:8px;padding:14px 18px;max-width:700px;margin:12px auto 24px;font-size:14px}.sr-only{position:absolute;overflow:hidden;clip:rect(0,0,0,0);width:1px;height:1px;white-space:nowrap}.pulse-note{animation:note-hit .25s ease-out}@keyframes note-hit{0%{color:var(--lime);transform:scale(1.08)}100%{transform:scale(1)}}
@media(max-width:800px){.shell{padding:0 22px}.header{min-height:82px}.header-note{font-size:12px}.entry{padding:26px}.stage{padding:25px}.stage h1 span{display:block;margin:4px 0 0}.stage-center{gap:16px}.room-strip{gap:20px}.room-code{font-size:38px}.room-instruction{padding-left:20px}.stage-help h2{font-size:20px}}
@media(max-width:580px){.shell{padding:0 18px}.header{min-height:76px;gap:12px}.brand{font-size:20px}.header-note{display:none}.view{padding:26px 0}.intro{padding:6px 0 28px}.intro h1{font-size:42px;margin:14px 0}.intro .eyebrow{font-size:10px}.intro p{font-size:14px}.entry-grid{grid-template-columns:1fr;gap:14px}.entry{padding:24px}.entry h2{font-size:23px;margin-top:12px}.entry p{min-height:0;margin-bottom:20px;font-size:15px}.home-footer{flex-direction:column;gap:8px}.room-strip{flex-wrap:wrap;gap:16px;position:relative;padding-right:80px;min-height:126px}.room-code{font-size:34px}.room-instruction{padding:0;border:0}.room-instruction p{font-size:12px}.qr{position:absolute;top:8px;right:0;width:76px;height:76px}.stage{padding:20px 16px}.stage-top{align-items:flex-start}.stage h1{font-size:24px}.stage h1 span{font-size:11px}.stage .eyebrow{font-size:10px}.status{font-size:11px;padding:4px 9px}.stage-center{grid-template-columns:1fr;gap:0}.note-orbit{height:180px}.current-note{font-size:65px}.stage-help{text-align:center;padding:0 0 24px}.stage-help>.eyebrow{display:none}.stage-help h2{font-size:20px;margin:0 0 8px}.stage-help p{font-size:13px}.beat-dots{justify-content:center;margin-top:12px}.score-note{min-height:48px;font-size:18px;gap:5px}.score-note small{font-size:11px}.stage-bottom{gap:10px;flex-wrap:wrap}#latency{font-size:11px}.host-actions{width:100%;margin:0;justify-content:flex-end}.sound-row{gap:10px;flex-wrap:wrap}.sound-row input{max-width:115px}#sound-state{width:100%}.footer{font-size:10px}.phone-card{padding:25px 22px}.phone-card h1{font-size:27px}.phone-card p{font-size:14px}.phone-view{padding-top:24px}.phone-card .cal-visual{height:155px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}