:root{color-scheme:dark;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#101319;color:#e9edf4}*{box-sizing:border-box}body{margin:0}main{display:flex;flex-direction:column;min-height:100dvh;max-width:1600px;margin:auto;padding:env(safe-area-inset-top) max(14px,env(safe-area-inset-right)) env(safe-area-inset-bottom) max(14px,env(safe-area-inset-left))}header{height:70px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:12px;font-size:.78rem;letter-spacing:.19em;font-weight:750}.brand .mark{font-size:2rem;color:#ff944f}.brand small{display:block;color:#8d98a7;font-size:.57rem;letter-spacing:.21em;margin-top:2px}button{border:1px solid #384350;background:#1d252e;color:#f1f4fa;border-radius:10px;padding:10px 14px;font:inherit;cursor:pointer}button:active{transform:translateY(1px)}button span{font-size:.82rem}.stage{position:relative;flex:1;min-height:calc(100dvh - 135px);border:1px solid #2c3540;border-radius:16px;overflow:hidden;background:radial-gradient(ellipse at 50% 35%,#283442 0%,#17202a 50%,#111820 100%)}model-viewer{width:100%;height:100%;min-height:calc(100dvh - 135px);--poster-color:transparent}.placeholder{display:grid;place-items:center;width:100%;height:100%;color:#aebaca;text-align:center;padding:24px}.overlay{position:absolute;inset:0;background:#17202a}.overlay[hidden]{display:none}.hint{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);white-space:nowrap;background:#121921bb;border:1px solid #ffffff20;border-radius:99px;padding:8px 12px;color:#c4cedb;font-size:.72rem;pointer-events:none}footer{min-height:55px;display:flex;align-items:center;justify-content:space-between;gap:12px;color:#9baaba;font-size:.75rem}@media(max-width:500px){header{height:60px}.stage,model-viewer{min-height:calc(100dvh - 115px)}footer{min-height:55px}.hint{font-size:.64rem}}