:root{color-scheme:dark;--bg: #0e0e10;--text: #f5f5f6;--muted: #9b9ba4;--danger: #ffb4b4}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}body{min-height:100dvh;overflow:hidden;overscroll-behavior:none}button{font:inherit;color:#141416;background:#f5f5f6;border:0;border-radius:999px;min-height:44px;min-width:44px;padding:12px 22px;cursor:pointer;touch-action:manipulation}button:disabled{opacity:.6;cursor:default}button:focus-visible{outline:2px solid #fff;outline-offset:3px}#camera{position:fixed;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;background:#000;z-index:0}#overlay{position:fixed;inset:0;z-index:2;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .25s ease}#overlay.is-visible{opacity:1}.overlay-card{width:min(100%,920px);padding:18px 16px 14px;border-radius:18px;background:#0000008c;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);text-align:center}#overlay-title{margin:0;color:#ffe14a;font-size:clamp(34px,10vw,68px);font-weight:700;line-height:1.15;text-wrap:balance}#overlay-text{margin:12px 0 0;color:#fff;font-size:clamp(16px,4.4vw,28px);font-weight:400;line-height:1.35;text-wrap:balance}#hold-bar{height:3px;margin:14px 6px 2px;border-radius:999px;background:#ffffff38;overflow:hidden}#hold-bar-fill{width:100%;height:100%;background:#ffffffeb;transform-origin:left center;transform:scaleX(1)}#hud{position:fixed;inset:0;z-index:4;pointer-events:none}#btn-stop,#btn-sim{pointer-events:auto}#btn-stop{position:fixed;top:max(12px,env(safe-area-inset-top));right:max(12px,env(safe-area-inset-right));z-index:5;padding:10px 16px;color:#fff;background:#00000073;border:1px solid rgba(255,255,255,.18)}.hud-bottom{position:fixed;left:16px;right:16px;bottom:max(16px,env(safe-area-inset-bottom));z-index:4;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center}#hint,#status,#debug-readout{margin:0}#hint{color:#ffffffc7;font-size:14px;font-weight:400;text-shadow:0 1px 2px rgba(0,0,0,.6)}#status{color:#fff;font-size:13px;line-height:1.2;padding:8px 12px;border-radius:999px;background:#0006}#debug-readout{max-width:100%;color:#d7d7de;font-family:ui-monospace,Cascadia Code,Consolas,monospace;font-size:11px;line-height:1.35;word-break:break-word}#btn-sim{color:#fff;background:#00000073;border:1px solid rgba(255,255,255,.18)}.screen{position:fixed;inset:0;z-index:6;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:max(24px,env(safe-area-inset-top)) 16px max(24px,env(safe-area-inset-bottom));background:var(--bg);text-align:center}.screen[hidden]{display:none!important}.screen h1{margin:0;font-size:clamp(28px,8vw,40px);line-height:1.2;font-weight:700}.screen p{margin:0;max-width:28rem;font-size:18px;line-height:1.4}.fine{color:var(--muted);font-size:13px!important}#error-text{color:var(--danger)}#btn-start,#btn-retry{width:min(100%,320px);font-size:18px;font-weight:600}