:root{--bg:#0b1320;--panel-bg:#121c2b;--panel-border:#22324a;--text:#e8eef6;--text-muted:#a9b8cc;--text-disabled:#8494aa;--accent:#ffd60a;--accent-text:#111;--pause:#e9ecef;--focus:#4cc9f0;color:var(--text);background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}*{box-sizing:border-box}html,body{height:100%;margin:0;overflow:hidden}.app{grid-template-columns:1fr clamp(280px,22vw,360px);height:100vh;display:grid}.stage{min-width:0;min-height:0;position:relative}#scene{width:100%;height:100%;display:block}.fallback{margin:0;padding:2rem;font-size:1.25rem;line-height:1.5}.panel{background:var(--panel-bg);border-left:1px solid var(--panel-border);flex-direction:column;gap:1rem;padding:1.25rem;display:flex;overflow-y:auto}.panel h1{margin:0;font-size:1.35rem}.field{border:0;min-width:0;margin:0;padding:0}.field legend,.field>label{margin-bottom:.4rem;font-weight:600;display:block}.options{flex-wrap:wrap;gap:.35rem 1rem;display:flex}.options label{cursor:pointer;align-items:center;gap:.35rem;display:inline-flex}input[type=radio],input[type=range]{accent-color:var(--accent)}.range-row{align-items:center;gap:.75rem;display:flex}.range-row input[type=range]{flex:1;min-width:0}.range-row output{text-align:right;font-variant-numeric:tabular-nums;min-width:5.5em}select{width:100%;font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--panel-border);border-radius:6px;padding:.4rem}.field:disabled,.field.is-disabled,select:disabled{color:var(--text-disabled);cursor:not-allowed}.options label:has(input:disabled){color:var(--text-disabled);cursor:not-allowed}.start-pause{font:inherit;color:var(--accent-text);background:var(--accent);cursor:pointer;border:0;border-radius:8px;padding:.8rem 1rem;font-size:1.4rem;font-weight:700}.start-pause[data-running=true]{background:var(--pause)}.hint{color:var(--text-muted);margin:-.5rem 0 0;font-size:.9rem}.readout{color:var(--text-muted);margin:0}.readout strong{color:var(--text);font-variant-numeric:tabular-nums;font-size:1.1rem;display:block}:focus-visible{outline:3px solid var(--focus);outline-offset:2px}