:root{
  color-scheme:dark;
  --ink:#121426;--panel:#191a30d9;--panel-solid:#202139;--text:#f5f3ff;--muted:#bdb8cc;--border:#ffffff30;
  --grab:#5be7df;--reach:#ffb96e;--squeeze:#e5f57c;--clap:#ff93c7;--flip:#b9a5ff;--sweep:#ff8a65;
  --font:Inter,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden}
body{background:var(--ink);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{opacity:.4;cursor:default}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--grab);outline-offset:4px}
[hidden]{display:none!important}
[data-type=grab]{--note:var(--grab)}[data-type=reach]{--note:var(--reach)}[data-type=squeeze]{--note:var(--squeeze)}
[data-type=clap]{--note:var(--clap)}[data-type=flip]{--note:var(--flip)}[data-type=sweep]{--note:var(--sweep)}

.game-shell{position:relative;width:100%;height:100%;isolation:isolate}
#video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transform:scaleX(-1);display:none;z-index:0;pointer-events:none}
#game{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;z-index:1;outline:none}
.screen-vignette{position:absolute;inset:0;pointer-events:none;z-index:2;background:linear-gradient(180deg,#12142680,transparent 22%,transparent 72%,#121426a0)}

/* HUD */
.hud{position:absolute;z-index:6;left:32px;right:32px;top:max(24px,env(safe-area-inset-top));display:flex;align-items:center;gap:24px;pointer-events:none;text-shadow:0 1px 6px #1118}
.logo{font-size:19px;letter-spacing:-1px;line-height:.86;font-weight:900;text-decoration:none;color:var(--text);flex-shrink:0}
.logo span{display:block;margin-top:3px}
.stats{display:flex;gap:34px;margin:0 auto}
.stats span{font-size:9px;letter-spacing:2px;color:var(--muted);display:block;margin-bottom:6px}
.stats strong{font-size:22px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}
#score{color:var(--grab);min-width:88px;display:block}
#combo{color:var(--clap)}
#groove[data-level="2"]{color:var(--reach)}#groove[data-level="3"]{color:var(--squeeze)}#groove[data-level="4"]{color:var(--grab)}
.hud-tools{display:flex;gap:8px;pointer-events:auto}
.icon-button{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--border);background:#191a30b8;border-radius:50%;font-size:17px;font-weight:600}
.icon-button:hover{background:#2a2b48}
.icon-button svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.topline{position:absolute;z-index:4;top:88px;left:32px;right:32px;display:flex;justify-content:space-between;align-items:center;font-size:10px;letter-spacing:1.5px;color:#e5e2f1;pointer-events:none;text-shadow:0 1px 5px #111}
#mode{color:var(--grab)}
#energy{color:var(--squeeze);font-size:20px;letter-spacing:4px}
#progress{font-variant-numeric:tabular-nums}
#feedback{position:absolute;z-index:4;left:0;right:0;top:118px;text-align:center;font-size:16px;font-weight:800;letter-spacing:1px;color:#fff;text-shadow:0 1px 6px #111;pointer-events:none;min-height:20px}
#feedback[data-tone=perfect]{color:var(--squeeze)}#feedback[data-tone=good]{color:var(--grab)}#feedback[data-tone=miss]{color:var(--clap)}
body:not(.playing) .topline,body:not(.playing) #feedback,body:not(.playing) .play-toolbar{visibility:hidden}

/* Tutorial lesson card */
.lesson{position:absolute;z-index:5;top:146px;left:50%;transform:translateX(-50%);width:min(460px,calc(100% - 32px));background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:14px 18px 12px;backdrop-filter:blur(10px)}
.lesson-head{display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:1.6px;color:var(--muted)}
.lesson-dots{display:flex;gap:6px}
.lesson-dots i{width:10px;height:10px;border-radius:50%;border:1.5px solid var(--squeeze)}
.lesson-dots i.on{background:var(--squeeze)}
.lesson h2{margin:6px 0 4px;font-size:20px;letter-spacing:-.5px}
.lesson p{margin:0;font-size:12px;line-height:1.55;color:#e1dcef}
.lesson-note{min-height:18px;margin-top:6px!important;font-weight:700}
.lesson-note[data-kind=pass],.lesson-note[data-kind=advance],.lesson-note[data-kind=finish]{color:var(--squeeze)}
.lesson-note[data-kind=fail]{color:var(--clap)}
.lesson-actions{display:flex;justify-content:flex-end;margin-top:4px}
.lesson-actions .pill-button{padding:6px 12px;font-size:11px}

/* Launch overlay */
.launch-overlay{position:absolute;inset:0;z-index:5;display:flex;align-items:center;padding:96px max(7vw,32px) 64px;overflow:hidden auto;background:linear-gradient(90deg,#121426f2,#121426d0 60%,#12142660)}
.launch-panel{position:relative;z-index:1;max-width:680px;width:60%}
.eyebrow{font-size:9px;font-weight:600;letter-spacing:2.2px;color:var(--grab);display:flex;align-items:center;gap:9px;margin:0 0 20px}
.eyebrow>span:first-child{width:5px;height:5px;background:currentColor;border-radius:50%}
.eyebrow .edition{color:#9d93b3;margin-left:16px;white-space:nowrap}
h1{font-family:"Arial Black",Inter,Arial,sans-serif;font-size:clamp(52px,6.4vw,92px);font-weight:900;letter-spacing:-4px;line-height:.94;margin:0 0 18px;color:#fff}
h1 em{font-style:normal;color:var(--clap)}
.intro-description{font-size:15px;line-height:1.6;color:#ded8ed;margin:0 0 18px}
.intro-description b{color:#fff}
.intro-gestures{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.intro-gestures>span{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--border);background:#191a30b8;padding:8px 10px;font-size:10px;letter-spacing:1px;font-weight:800;white-space:nowrap}
.intro-gestures i{font-style:normal;color:var(--note);font-size:14px}
.intro-gestures small{font-size:9px;color:var(--muted);font-weight:400;letter-spacing:0}
.difficulty-choice{display:flex;align-items:center;gap:14px;margin:10px 0;font-size:13px;color:#ded8ed}
.difficulty-choice span,.difficulty-choice{min-width:0}
.difficulty-choice select{flex:1;min-width:0;padding:10px 12px;background:var(--panel-solid);border:1px solid #ffffff40;border-radius:10px}
.level-description{color:#d5d7f3;font-size:12px;line-height:1.6;margin:-4px 0 10px;padding-left:56px}
.small{font-size:11px;line-height:1.6;color:#b9b9d3;margin:8px 0 0}
.launch-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:16px}
.start-button,.tutorial-button{border:0;border-radius:3px;padding:15px 20px;font-size:14px;font-weight:800;display:flex;gap:28px;justify-content:space-between;align-items:center;min-width:150px}
.start-button span,.tutorial-button span{font-size:20px;font-weight:400;line-height:.7}
.start-button{background:var(--squeeze);color:#141527}
.start-button:hover{background:#f0ffbd}
.tutorial-button{background:transparent;color:#fff;border:1px solid #ffffff60}
.tutorial-button:hover{border-color:#fff}
.practice-button{border:1px solid #ffffff40;border-radius:3px;padding:14px 16px;background:#191a30;font-size:12px}
.practice-button:hover{background:#25264a}
/* First visit: the tutorial becomes the main call to action. */
.first-run .tutorial-button{background:var(--squeeze);color:#141527;border-color:transparent;order:-1}
.first-run .start-button{background:transparent;color:#fff;border:1px solid #ffffff60}
.first-run-hint{display:none;font-size:12px;color:var(--squeeze);margin:12px 0 0}
.first-run .first-run-hint{display:block}
.intro-art{position:absolute;width:420px;height:440px;right:7vw;top:calc(50% - 220px);pointer-events:none}
.intro-art svg{width:100%;height:100%}
.art-label{position:absolute;left:40px;bottom:6px;font-size:11px;font-weight:800;letter-spacing:2.5px;color:#ded8ed;transform:rotate(-4deg)}
.overlay-footer{position:absolute;bottom:22px;left:max(7vw,32px);font-size:8px;letter-spacing:2px;color:#6d6585}

/* Results */
#summary h1{font-size:clamp(34px,4vw,56px);letter-spacing:-2px;line-height:1.1}
.summary-lead{color:#ded8ed;font-size:13px;line-height:1.6;margin:4px 0 0}
.result-head{display:flex;align-items:center;gap:22px;margin:4px 0 16px}
.rank{font-family:"Arial Black",Inter,Arial,sans-serif;font-size:96px;line-height:1;font-weight:900;color:var(--squeeze);min-width:90px;text-align:center}
.rank[data-rank=S]{color:var(--grab)}.rank[data-rank=B]{color:var(--reach)}.rank[data-rank=C]{color:var(--flip)}.rank[data-rank=D]{color:var(--clap)}
.result-score{font-size:clamp(44px,5vw,68px);font-weight:800;letter-spacing:-3px;line-height:1;font-variant-numeric:tabular-nums}
.judge-row{display:flex;gap:22px;font-size:10px;letter-spacing:1.5px;color:var(--muted);margin-bottom:14px}
.judge-row b{display:block;font-size:22px;color:#fff;letter-spacing:0;margin-top:4px}
.type-bars{display:grid;grid-template-columns:1fr 1fr;gap:6px 22px;max-width:520px;margin-bottom:14px}
.type-row{display:grid;grid-template-columns:70px 1fr 40px;align-items:center;gap:10px;font-size:10px;font-weight:800;letter-spacing:1px}
.type-row span{color:var(--note)}
.type-row i{height:6px;background:#ffffff18;position:relative;border-radius:3px;overflow:hidden}
.type-row i:after{content:"";position:absolute;inset:0 auto 0 0;width:var(--v);background:var(--note)}
.type-row b{font-variant-numeric:tabular-nums;text-align:right}
.advice{border-left:3px solid var(--squeeze);padding:4px 0 4px 12px;margin-bottom:14px}
.advice p{margin:0 0 8px;font-size:13px;color:#ded8ed}
.summary-actions{display:flex;gap:12px;flex-wrap:wrap}

/* Toolbar */
.play-toolbar{position:absolute;z-index:3;bottom:max(18px,env(safe-area-inset-bottom));left:32px;right:32px;display:flex;justify-content:space-between;align-items:center;gap:16px;pointer-events:none}
.live-input{width:200px;flex-shrink:0;font-size:10px;color:#fff;display:flex;align-items:center;flex-wrap:wrap;gap:7px;text-shadow:0 1px 5px #111}
.live-dot{width:6px;height:6px;background:var(--grab);border-radius:50%}
.live-input small{width:100%;font-size:9px;color:var(--muted);padding-left:13px}
.action-buttons{display:none;gap:6px;pointer-events:auto}
.pointer-mode .action-buttons{display:flex}
.action-button{display:flex;align-items:center;gap:9px;min-height:52px;padding:8px 13px;background:#191a30c9;border:1px solid var(--border);border-radius:4px;text-align:left;touch-action:none;user-select:none}
.action-button:active{transform:scale(.96);border-color:var(--note)}
.action-button>i{color:var(--note);font-size:18px;font-style:normal}
.action-button>span{font-size:10px;font-weight:800;letter-spacing:1px}
.action-button small{display:block;font-size:8px;color:var(--muted);font-weight:400;letter-spacing:0;margin-top:3px}
.action-button kbd{font-family:inherit;font-size:8px;color:#8d86a3;align-self:flex-start}
.stop-button{pointer-events:auto;display:flex;align-items:center;gap:8px;background:#191a30b8;border:1px solid var(--border);border-radius:30px;font-size:10px;letter-spacing:1.5px;padding:10px 16px}
.stop-button span{color:var(--clap);font-size:8px}

/* Modals */
.modal-backdrop{position:absolute;inset:0;z-index:10;padding:24px;display:flex;align-items:center;justify-content:center;background:#050510b3;backdrop-filter:blur(16px);overflow:auto}
.modal{width:100%;max-width:600px;background:var(--panel-solid);border:1px solid var(--border);border-radius:20px;padding:26px 28px;max-height:calc(100dvh - 48px);overflow:auto}
.modal-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.modal-heading .eyebrow{margin:0}
.modal h2{font-size:26px;letter-spacing:-.8px;margin:0 0 12px}
.modal-intro,.tip{font-size:12px;color:#dfd9ed;line-height:1.7;margin:0 0 16px}
.help-sub{font-size:12px;letter-spacing:1.5px;margin:18px 0 6px;color:var(--squeeze)}
.gesture-guide{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.gesture-guide article{display:flex;gap:12px;border:1px solid var(--border);border-radius:12px;padding:12px}
.gesture-guide article>i{color:var(--note);font-style:normal;font-size:22px;width:22px;text-align:center}
.gesture-guide h3{font-size:11px;letter-spacing:1px;margin:0 0 6px;color:var(--note)}
.gesture-guide p{font-size:11px;color:#dfd9ed;line-height:1.6;margin:0}
.setting-block{margin:18px 0 10px}
.setting-label{font-size:9px;letter-spacing:1.2px;color:var(--muted);display:block;margin-bottom:10px}
.input-options{display:flex;gap:9px}
.pill-button{border:1px solid #ffffff40;background:#30314c;border-radius:9px;padding:10px 14px;font-size:12px}
.pill-button:hover{border-color:#fff}
.setting-note{font-size:11px;color:#dfd9ed;line-height:1.7;margin:10px 0}
#status[data-stage=error]{color:#ff9ea2}#status[data-stage=ready]{color:var(--squeeze)}
#cancel-camera{margin-top:10px}
.camera-choice{display:flex;align-items:center;justify-content:space-between;font-size:12px;margin-top:14px}
.camera-choice select,.setting-row select{max-width:220px;padding:8px;background:#30314c;border:1px solid #ffffff30;border-radius:8px}
#camera-preview{width:100%;height:160px;object-fit:contain;background:#06080c;border-radius:12px;transform:scaleX(-1);margin-top:12px}
.setting-row{display:flex;justify-content:space-between;align-items:center;gap:18px;min-height:64px;border-bottom:1px solid var(--border);font-size:12px}
.setting-row b{font-weight:600}
.setting-row small{display:block;font-size:10px;color:var(--muted);margin-top:4px}
.setting-row input[type=checkbox]{appearance:none;width:34px;height:20px;border-radius:20px;background:#40334d;position:relative;margin:0;flex-shrink:0;cursor:pointer}
.setting-row input[type=checkbox]:before{content:"";position:absolute;width:14px;height:14px;left:3px;top:3px;background:#978aa9;border-radius:50%;transition:transform .18s}
.setting-row input:checked{background:#5be7df50}
.setting-row input:checked:before{background:var(--grab);transform:translateX(14px)}
.offset-setting{padding-top:20px}
.offset-setting label{display:flex;justify-content:space-between;font-size:12px;margin-bottom:14px}
.offset-setting output{color:var(--grab);font-variant-numeric:tabular-nums}
input[type=range]{width:100%;accent-color:var(--grab)}
.range-labels{display:flex;justify-content:space-between;font-size:9px;color:var(--muted);margin-top:8px}

@media(max-width:1080px){
  .launch-panel{width:70%}
  .intro-art{right:-40px;opacity:.6;transform:scale(.8);transform-origin:right center}
  .stats{gap:22px}
}
@media(max-width:760px){
  .hud{left:16px;right:16px;gap:12px}
  .logo{font-size:14px}
  .stats{gap:14px}
  .stats span{font-size:7px;letter-spacing:1px}
  .stats strong{font-size:16px}
  #score{min-width:62px}
  .acc-stat{display:none}
  .icon-button{width:30px;height:30px;font-size:14px}
  .topline{left:16px;right:16px;top:72px;font-size:8px}
  #energy{font-size:15px}
  #feedback{top:96px;font-size:13px}
  .lesson{top:122px;padding:10px 14px}
  .lesson h2{font-size:16px}
  .lesson p{font-size:11px}
  .launch-overlay{align-items:flex-start;padding:88px 20px 48px}
  .launch-panel{width:100%}
  h1{font-size:56px;letter-spacing:-3px}
  .intro-art{right:-120px;top:120px;opacity:.22;transform:scale(.6);transform-origin:right top}
  .level-description{padding-left:0}
  .play-toolbar{left:12px;right:12px;flex-wrap:wrap;gap:8px}
  .live-input{width:auto;flex:1;order:1}
  .live-input small{display:none}
  .stop-button{order:2}
  .action-buttons{order:0;width:100%;justify-content:center}
  .action-button{flex:1;max-width:140px;padding:8px;gap:6px}
  .action-button kbd{display:none}
  .gesture-guide,.type-bars{grid-template-columns:1fr}
  .rank{font-size:72px;min-width:64px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}