:root{--bg:#0b0f14;--fg:#e6edf3;--muted:#8b98a5;--accent:#4cc2ff;--panel:#141a21eb;--font:system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;color:var(--fg);font-family:var(--font);-webkit-user-select:none;user-select:none;margin:0;padding:0;overflow:hidden}#render-canvas{touch-action:none;outline:none;width:100%;height:100%;display:block}.overlay{z-index:10;background:var(--bg);place-items:center;transition:opacity .25s;display:grid;position:fixed;inset:0}.overlay[hidden]{display:none}.overlay--fading{opacity:0;pointer-events:none}.overlay__panel{text-align:center;background:var(--panel);border:1px solid #ffffff14;border-radius:12px;max-width:min(90vw,34rem);padding:1.5rem 2rem}.overlay__title{letter-spacing:.02em;margin:0;font-size:1.1rem;font-weight:600}.overlay__detail{color:var(--muted);white-space:pre-wrap;margin:.5rem 0 0;font-size:.875rem;line-height:1.5}.overlay--error .overlay__title{color:#ff6b6b}.hud{background:var(--panel);font-variant-numeric:tabular-nums;color:var(--muted);pointer-events:none;border-radius:8px;gap:.75rem;padding:.35rem .6rem;font-size:.75rem;display:flex;position:fixed;top:.75rem;left:.75rem}.hud[hidden]{display:none}.hud__item strong{color:var(--accent);font-weight:600}.joystick{z-index:1;bottom:calc(1.25rem + env(safe-area-inset-bottom));left:calc(1.25rem + env(safe-area-inset-left));opacity:.55;touch-action:none;-webkit-tap-highlight-color:transparent;background:radial-gradient(circle,#4cc2ff12,#141a219e);border:1px solid #ffffff1f;border-radius:50%;place-items:center;width:8.5rem;height:8.5rem;transition:opacity .15s;display:grid;position:fixed}.joystick--active{opacity:.9}.joystick__knob{pointer-events:none;background:#e6edf3d9;border-radius:50%;width:44%;height:44%;transition:translate .14s ease-out;box-shadow:0 2px 10px #00000073}.joystick--active .joystick__knob{transition:none}