:root{--bg: #070b14;--ink: #e8eef8;--muted: #8ea3c0;--line: #1e2c44;--accent: #54c8ff}*{box-sizing:border-box}html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased}canvas{display:block}#hud{position:fixed;left:26px;top:24px;z-index:10;pointer-events:none;max-width:460px}#hud h1{margin:6px 0 8px;font-size:26px;letter-spacing:.2px}#hud p{margin:0;font-size:13px;color:var(--muted);line-height:1.6}.eyebrow{margin:0;font-size:11px;letter-spacing:1.4px;text-transform:uppercase;color:var(--accent)}#toolbar{position:fixed;left:26px;top:148px;z-index:10;display:flex;gap:8px}.btn{padding:7px 14px;border:1px solid var(--line);border-radius:999px;background:#0b1523d1;color:var(--muted);font-size:12px;font-family:inherit;cursor:pointer;transition:all .18s ease}.btn:hover{color:var(--ink);border-color:#2c5273}.btn.is-active{background:var(--accent);border-color:var(--accent);color:#05202e;font-weight:600}.fps{position:fixed;top:24px;right:26px;z-index:10;padding:6px 11px;border:1px solid rgba(90,220,150,.45);border-radius:6px;background:#061610d1;color:#7ff0ad;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;letter-spacing:.3px;pointer-events:none}.fps b{font-size:15px}.fps.is-low{border-color:#ff826e80;color:#ff9c86}#legend{position:fixed;left:26px;bottom:26px;z-index:10;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#0c1422bd;font-size:12px;color:#9fb3cf}#legend div{display:flex;align-items:center;gap:9px;margin:5px 0}#legend .hint{margin-top:10px;color:#6f84a0}.dot{width:9px;height:9px;border-radius:50%;display:inline-block}#panel{position:fixed;right:26px;top:84px;width:276px;z-index:10;padding:16px 18px;border:1px solid #22334f;border-radius:12px;background:#0c1422e0;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);opacity:0;transform:translateY(-6px);transition:opacity .18s ease,transform .18s ease;pointer-events:none}#panel.is-open{opacity:1;transform:translateY(0)}#panel h2{margin:4px 0 12px;font-size:17px}#panel dl{margin:0;font-size:13px}#panel dl>div{display:flex;justify-content:space-between;gap:12px;padding:5px 0;border-bottom:1px solid rgba(30,44,68,.7)}#panel dl>div:last-child{border-bottom:none}#panel dt{color:var(--muted)}#panel dd{margin:0;font-weight:600}#panel dd.ok{color:#6ee7a8}#panel dd.warn{color:#ffb545}#hint{position:fixed;left:50%;bottom:26px;transform:translate(-50%);z-index:10;font-size:12px;color:#7d90ab;pointer-events:none}@media(max-width:720px){#legend,#hint{display:none}#hud h1{font-size:20px}}