:root {
    color-scheme: dark;
    --bg: #06080d;
    --panel: rgba(16, 21, 31, .88);
    --line: rgba(255,255,255,.10);
    --text: #f6f8fb;
    --muted: #98a1b1;
    --p1: #33d6ff;
    --p2: #ff4f87;
    --accent: #ffd34e;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: radial-gradient(circle at 50% 0%, #182235 0, var(--bg) 48rem); color: var(--text); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body { min-height: 100vh; }
button { font: inherit; }
.game-shell { width: min(1420px, 96vw); margin: 0 auto; padding: 24px 0 32px; }
.topbar { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 14px; }
.eyebrow { margin: 0 0 4px; letter-spacing: .28em; font-size: .72rem; color: var(--accent); font-weight: 800; }
h1 { margin: 0; font-size: clamp(1.8rem, 4vw, 3.4rem); line-height: .95; letter-spacing: -.04em; text-transform: uppercase; }
.top-actions button { border: 1px solid var(--line); color: var(--text); background: #171d29; border-radius: 10px; padding: 10px 14px; cursor: pointer; }
.top-actions button:hover, .top-actions button:focus-visible { background: #222a3a; outline: 2px solid var(--accent); outline-offset: 2px; }
.instructions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; color: #c6cbd5; font-size: .88rem; margin-bottom: 10px; }
.instructions > div { padding: 9px 12px; border: 1px solid var(--line); background: rgba(255,255,255,.035); border-radius: 10px; }
.race-panel { position: relative; overflow: hidden; border-radius: 18px; border: 1px solid rgba(255,255,255,.14); background: #0b1018; box-shadow: 0 24px 80px rgba(0,0,0,.35); }
canvas { width: 100%; height: auto; aspect-ratio: 5 / 3; display: block; }
.message { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%); padding: 18px 28px; border-radius: 14px; background: rgba(5,8,13,.90); border: 1px solid rgba(255,255,255,.22); font-size: clamp(1.4rem, 3vw, 2.4rem); font-weight: 900; text-transform: uppercase; letter-spacing: .08em; text-align: center; }
.hud-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.hud { padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); backdrop-filter: blur(10px); }
.hud-title { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; margin-bottom: 12px; }
.hud-title > span { display: grid; place-items: center; width: 34px; height: 28px; border-radius: 7px; font-weight: 900; background: rgba(255,255,255,.09); }
.p1 .hud-title strong { color: var(--p1); }
.p2 .hud-title strong { color: var(--p2); }
.hud-title b { font-variant-numeric: tabular-nums; }
.meter-row { display: grid; grid-template-columns: 58px 1fr 48px; gap: 10px; align-items: center; margin: 7px 0; font-size: .82rem; color: var(--muted); }
.meter { height: 8px; border-radius: 999px; background: #090c12; overflow: hidden; border: 1px solid rgba(255,255,255,.07); }
.meter i { display: block; width: 100%; height: 100%; background: linear-gradient(90deg, #ff5454, #ffd34e 45%, #44e193); transition: width .12s linear; }
output { text-align: right; color: #e8ebf0; font-variant-numeric: tabular-nums; }
.hud-bottom { display: flex; justify-content: space-between; margin-top: 10px; padding-top: 9px; border-top: 1px solid var(--line); color: #cbd1da; font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; }
.pit-hint { margin: 10px 2px 0; color: #8992a2; font-size: .78rem; text-align: center; }
@media (max-width: 760px) {
    .game-shell { width: min(100% - 16px, 1420px); padding-top: 12px; }
    .topbar { align-items: center; }
    .instructions, .hud-grid { grid-template-columns: 1fr; }
    .instructions { font-size: .78rem; }
    .top-actions button { padding: 8px 10px; font-size: .78rem; }
}