:root {
    --bg: #03040a;
    --panel: #0b1730;
    --line: #2f4d87;
    --text: #ecf4ff;
    --muted: #a8b9de;
    --cyan: #5cf2ff;
    --pink: #ff6be7;
    --amber: #ffc86f;
    --good: #7dffae;
    --bad: #ff7b9e;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Inter", "Segoe UI", system-ui, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 8%, rgba(92, 242, 255, 0.16), transparent 40%),
        radial-gradient(circle at 88% 10%, rgba(255, 107, 231, 0.14), transparent 45%),
        linear-gradient(160deg, #020307, #050a18 58%, #03040a);
    display: flex;
    justify-content: center;
    padding: 1rem;
}

.app {
    width: min(920px, 100%);
    display: grid;
    gap: 0.85rem;
}

.panel {
    border: 1px solid var(--line);
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(11, 23, 48, 0.94), rgba(6, 11, 25, 0.96));
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.35);
}

.topbar {
    padding: 0.9rem 1rem;
}

.back {
    color: var(--amber);
    text-decoration: none;
    font-weight: 700;
}

h1 {
    margin: 0.62rem 0 0.3rem;
    font-size: clamp(1.34rem, 3vw, 1.95rem);
}

.topbar p {
    margin: 0;
    color: var(--muted);
}

.hud {
    padding: 0.75rem;
    display: grid;
    grid-template-columns: repeat(6, minmax(110px, 1fr));
    gap: 0.5rem;
}

.hud div {
    border: 1px solid #35579b;
    border-radius: 9px;
    background: rgba(3, 8, 20, 0.78);
    padding: 0.38rem 0.5rem;
    display: grid;
    gap: 0.08rem;
}

.hud span {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.64rem;
    color: var(--muted);
}

.hud strong {
    font-size: 0.97rem;
}

.race-wrap {
    padding: 0.8rem;
    display: grid;
    gap: 0.6rem;
}

canvas {
    width: 100%;
    border-radius: 12px;
    border: 1px solid #3f63ac;
    background: #050810;
    image-rendering: pixelated;
}

.status {
    margin: 0;
    color: var(--muted);
    min-height: 1.3rem;
}

.status.good {
    color: var(--good);
}

.status.bad {
    color: var(--bad);
}

.controls {
    display: grid;
    grid-template-columns: repeat(3, minmax(120px, 1fr));
    gap: 0.5rem;
}

button {
    border: 1px solid #466dbf;
    border-radius: 9px;
    background: #142650;
    color: var(--text);
    cursor: pointer;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 640;
    padding: 0.56rem 0.66rem;
    transition: transform 110ms ease, border-color 110ms ease;
    touch-action: manipulation;
}

button:hover {
    transform: translateY(-1px);
    border-color: #7facff;
}

button:active {
    transform: translateY(1px);
}

button.accent {
    border-color: #965df0;
    background: linear-gradient(180deg, #7647c6, #4f2e8c);
}

button:disabled {
    opacity: 0.58;
    cursor: not-allowed;
    transform: none;
}

@media (max-width: 860px) {
    .hud {
        grid-template-columns: repeat(3, minmax(120px, 1fr));
    }
}

@media (max-width: 560px) {
    .controls {
        grid-template-columns: repeat(2, minmax(120px, 1fr));
    }

    #start {
        grid-column: 1 / -1;
    }
}