:root{font-family:Inter,Arial,Helvetica,sans-serif;color:#fff;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:#172d41;min-height:640px;height:100svh;overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;color:inherit}a:focus-visible,button:focus-visible{outline:3px solid #b5d6ff;outline-offset:5px}button[hidden]{display:none!important}#city-scene,.fallback-scene,.scene-shade{position:fixed;inset:0;width:100%;height:100%;pointer-events:none}.fallback-scene{background:linear-gradient(#10203633,#07132155),url('/assets/city-adventure.jpg') center/cover}.scene-ready .fallback-scene{opacity:0;transition:opacity .6s}#city-scene{opacity:0;transition:opacity .7s;outline:none;touch-action:pan-y}.scene-ready #city-scene{opacity:1}.scene-shade{background:linear-gradient(180deg,#0c1b3159 0%,#16314708 36%,transparent 63%,#061322bb 100%)}header{position:absolute;top:0;left:0;right:0;padding:24px 36px;display:flex;justify-content:space-between;align-items:center;z-index:3}.home-link{display:flex;align-items:center;gap:11px}.home-link span{font-size:9px;font-weight:750;letter-spacing:2px;text-shadow:0 1px 8px #0009}.glass-button{display:inline-flex;align-items:center;gap:20px;background:#11263870;border:1px solid #ffffff3b;padding:11px 16px;border-radius:25px;backdrop-filter:blur(12px);font-size:11px;transition:background .15s}.glass-button:hover{background:#193a58bd}.identity{position:absolute;z-index:2;top:13%;left:50%;transform:translateX(-50%);width:min(640px,60vw);text-align:center;pointer-events:none}.eyebrow{font-size:10px;letter-spacing:3.3px;font-weight:700;margin:0 0 8px;text-shadow:0 2px 10px #071527}.identity h1{margin:0;line-height:0}.identity h1 img{width:100%;height:auto;filter:drop-shadow(0 5px 20px #08203977)}.tagline{font-size:clamp(15px,1.35vw,20px);font-weight:500;letter-spacing:1px;margin:-4px 0 0;text-shadow:0 2px 9px #071c36}.launch{position:absolute;z-index:2;bottom:8.5%;left:50%;transform:translateX(-50%);text-align:center;width:min(400px,90vw)}#scene-status{font-size:12px;letter-spacing:.8px;margin:0 0 14px;text-shadow:0 2px 8px #051126;font-weight:600}.play-button{display:inline-flex;justify-content:center;align-items:center;gap:22px;font-size:19px;font-weight:800;min-width:238px;padding:19px 26px;border:1px solid #91b0ff;border-radius:12px;background:#355df5;box-shadow:0 8px 30px #10295b66, inset 0 1px #ffffff40;transition:transform .18s,background .18s}.play-button:hover{transform:translateY(-3px);background:#4773ff}.play-button>span:first-child{font-size:14px}.play-arrow{margin-left:20px}.launch-note{font-size:10px;letter-spacing:.25px;margin:14px 0 0;color:#dbe5f3;text-shadow:0 1px 7px #071427}footer{position:absolute;bottom:0;left:0;right:0;padding:19px 30px;display:flex;align-items:center;justify-content:space-between;z-index:3;font-size:9px;color:#d5e0ed}.footer-separator{margin:0 8px}#motion-toggle{font-size:10px;padding:9px 13px}#motion-toggle:before{content:'Ⅱ';margin-right:-12px}#motion-toggle[aria-pressed=true]:before{content:'▶';font-size:8px}dialog{border:1px solid #d3e7ff40;border-radius:22px;padding:40px;background:#13263af5;backdrop-filter:blur(20px);color:white;max-width:460px;width:calc(100% - 36px);box-shadow:0 30px 100px #0008}dialog::backdrop{background:#0817299c;backdrop-filter:blur(5px)}dialog .close{position:absolute;right:14px;top:10px;border:0;background:none;font-size:28px;color:#a8bdd6}dialog .eyebrow{font-size:9px;letter-spacing:2px;color:#a9c7ff}dialog h2{font-size:28px;letter-spacing:-1px;margin:15px 0}dialog>p:not(.eyebrow){color:#b9cadf;line-height:1.65;font-size:13px}.controls{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:28px 0}.controls div{display:flex;flex-direction:column;gap:8px;font-size:12px;color:#b9cadf}kbd{color:#fff;font-family:inherit;font-size:12px;font-weight:bold}.mobile-note{font-size:11px!important}dialog .play-button{margin-top:12px;width:100%;font-size:15px}.scene-fallback .identity{top:18%}@media(min-width:1600px){.identity{width:740px}}@media(max-width:700px){header{padding:18px 20px}.home-link span{display:none}.glass-button{font-size:10px;padding:10px 14px}.identity{top:17%;width:88vw}.eyebrow{font-size:7px;letter-spacing:1.6px}.tagline{margin:4px 0 0;font-size:15px}.launch{bottom:12%}.play-button{padding:17px 24px;min-width:220px;font-size:18px}#scene-status{font-size:11px}.launch-note{font-size:9px}footer{padding:17px 18px}.footer-extra,.footer-separator{display:none}dialog{padding:30px}}@media(max-height:670px) and (min-width:701px){body{min-height:400px}.identity{top:9%;width:420px}.eyebrow{font-size:8px}.tagline{font-size:14px}.launch{bottom:8%}.launch-note{display:none}.play-button{padding:12px 23px;font-size:16px}#scene-status{margin-bottom:9px}header{padding:14px 24px}}@media(max-height:650px) and (max-width:700px){body{min-height:500px}.identity{top:14%;width:76vw}.launch{bottom:12%}#scene-status{display:none}.launch-note{font-size:8px}.play-button{padding:14px 22px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}