:root{--panel: rgba(30, 18, 12, .88);--border: rgba(255, 160, 90, .35);--accent: #ff8c42;--text: #fbf1e8;--muted: #d4b8a4}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,system-ui,sans-serif;color:var(--text);overflow:hidden;background:#160d08}#app{width:100vw;height:100vh;position:relative}#scene{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block}#topbar{position:absolute;top:0;left:0;right:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;flex-wrap:wrap;background:linear-gradient(to bottom,rgba(22,13,8,.92),transparent)}#topbar .left{display:flex;align-items:center;gap:10px}#back-link{color:var(--muted);text-decoration:none;font-size:20px;border:1px solid var(--border);border-radius:8px;padding:2px 10px}#back-link:hover{color:var(--accent);border-color:var(--accent)}h1{font-size:16px}#modes{display:flex;gap:6px}.mode-btn,.lang-switch button,#play-btn,#controls label{background:var(--panel);border:1px solid var(--border);color:var(--text);border-radius:99px;padding:6px 14px;font-size:13px;cursor:pointer}.mode-btn.active{background:var(--accent);border-color:var(--accent);color:#2a1200;font-weight:700}.lang-switch{display:flex;gap:4px}.lang-switch button.active{background:var(--accent);color:#2a1200;font-weight:700}#hint{position:absolute;top:58px;left:50%;transform:translate(-50%);z-index:9;font-size:13px;color:var(--muted);background:var(--panel);border:1px solid var(--border);border-radius:99px;padding:6px 16px;max-width:92vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#quake-banner{position:absolute;top:100px;left:50%;transform:translate(-50%);z-index:11;background:#ff3c282e;border:1px solid #ff5340;color:#ffb0a0;border-radius:12px;padding:10px 20px;font-size:16px;font-weight:700}#info-panel{position:absolute;left:16px;bottom:76px;z-index:10;width:340px;max-width:calc(100vw - 32px);background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:14px 16px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}#info-why{font-size:13.5px;line-height:1.6}#info-example{font-size:12.5px;color:var(--muted);line-height:1.5;margin-top:10px;border-top:1px solid var(--border);padding-top:8px}#controls{position:absolute;left:0;right:0;bottom:0;z-index:10;display:flex;align-items:center;justify-content:center;gap:14px;padding:12px 16px 16px;background:linear-gradient(to top,rgba(22,13,8,.92),transparent)}#controls label{display:flex;align-items:center;gap:8px;cursor:default;color:var(--muted)}#controls input[type=range]{width:150px;accent-color:var(--accent)}@media (max-width: 760px){h1{display:none}}