:root{color-scheme:dark;--bg: oklch(.075 0 0);--surface: oklch(.14 .018 350);--ink: oklch(.96 .012 350);--muted: oklch(.7 .025 350);--primary: oklch(.61 .21 350);--acid: oklch(.88 .19 125);--electric: oklch(.76 .15 210);--line: oklch(.96 .012 350 / .22);font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink)}*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:var(--bg)}body{min-height:100dvh;touch-action:none;-webkit-user-select:none;user-select:none}button{font:inherit;color:inherit}button:focus-visible{outline:2px solid var(--acid);outline-offset:4px}#stage{position:fixed;inset:0;width:100%;height:100%}.shell{position:fixed;inset:0;padding:clamp(18px,3vw,46px);pointer-events:none}.brand,.status,.controls,.intro{pointer-events:auto}.brand{position:absolute;top:clamp(18px,3vw,46px);left:clamp(18px,3vw,46px);display:flex;gap:14px;align-items:center}.brand h1{margin:0;font:900 clamp(22px,3vw,42px)/.85 "Arial Black",Impact,sans-serif;letter-spacing:-.04em}.brand p{margin:7px 0 0;color:var(--muted);font-size:10px;letter-spacing:.13em}.brand-mark{display:flex;gap:3px;align-items:flex-end;width:25px;height:28px}.brand-mark i{display:block;width:5px;background:var(--primary);animation:mark 1.2s ease-in-out infinite alternate}.brand-mark i:nth-child(1){height:40%}.brand-mark i:nth-child(2){height:100%;animation-delay:-.5s;background:var(--acid)}.brand-mark i:nth-child(3){height:65%;animation-delay:-.9s;background:var(--electric)}@keyframes mark{to{height:18%}}.status{position:absolute;top:clamp(20px,3vw,48px);right:clamp(18px,3vw,46px);text-align:right;min-width:150px}.status span{color:var(--acid);font-size:10px;letter-spacing:.12em}.status strong{display:block;margin:5px 0 9px;font-size:12px;font-weight:700}.meter{width:150px;height:2px;background:var(--line);overflow:hidden}.meter i{display:block;width:8%;height:100%;background:var(--acid);transition:width .18s ease-out}.intro{position:absolute;inset:0;display:grid;grid-template-columns:minmax(130px,1fr) minmax(280px,2fr);align-items:end;gap:7vw;padding:clamp(24px,6vw,88px);background:#010101d1;transition:opacity .8s ease,visibility .8s}.intro.hidden{opacity:0;visibility:hidden;pointer-events:none}.intro-index{align-self:center;margin:0;color:var(--primary);font:900 clamp(22px,4vw,64px)/.82 "Arial Black",Impact,sans-serif;letter-spacing:-.04em;transform:rotate(-4deg)}.intro-copy{max-width:780px}.intro h2{margin:0;max-width:10ch;font:900 clamp(52px,9vw,128px)/.82 "Arial Black",Impact,sans-serif;letter-spacing:-.04em;text-wrap:balance}.intro-copy>p{max-width:44ch;margin:clamp(24px,3vw,40px) 0;color:var(--muted);font-size:clamp(14px,1.3vw,18px);line-height:1.65}#start{width:min(100%,420px);border:0;padding:19px 20px;display:flex;justify-content:space-between;background:var(--primary);cursor:pointer;font-weight:800;transition:transform .2s ease,background .2s ease}#start:hover{transform:translateY(-3px);background:#f14aa8}#start b{font-size:20px}.gesture-hint{position:absolute;left:50%;bottom:98px;transform:translate(-50%);display:flex;gap:22px;width:max-content;opacity:0;transition:opacity .6s ease;color:var(--muted);font-size:10px;letter-spacing:.08em}.playing .gesture-hint{opacity:1}.engaged .gesture-hint{opacity:0}.controls{position:absolute;left:clamp(18px,3vw,46px);right:clamp(18px,3vw,46px);bottom:max(20px,env(safe-area-inset-bottom));display:flex;align-items:center;gap:8px;opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .45s ease,transform .45s ease,visibility .45s}.playing .controls{opacity:1;visibility:visible;transform:translateY(0)}.controls button{border:1px solid var(--line);background:#010101b8;padding:11px 13px;cursor:pointer;font-size:10px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.controls button span{color:var(--acid);margin-left:8px}.keys{margin-left:auto;color:var(--muted);font-size:10px;letter-spacing:.05em}@media(max-width:720px){.brand p,.keys{display:none}.status{min-width:100px}.meter{width:100px}.intro{grid-template-columns:1fr;align-content:end;gap:28px;padding:90px 20px max(34px,env(safe-area-inset-bottom))}.intro-index{display:none}.intro h2{font-size:clamp(52px,17vw,86px)}.intro-copy>p{margin:22px 0}.gesture-hint{bottom:83px;gap:12px;max-width:92vw;white-space:nowrap}.gesture-hint span:nth-child(2),.gesture-hint span:nth-child(3){display:none}.controls{justify-content:center}.controls button{flex:1;max-width:125px;padding-inline:7px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important}.brand-mark i{height:55%}}