:root {
    --bg: #0d1117;
    --cell-bg: #161b22;
    --accent: #7c3aed;
    --text: #e6edf3;
    --text-dim: #8b949e;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    text-align: center;
    padding: 24px 16px;
}

#status {
    color: var(--text-dim);
    font-size: 18px;
}

.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    max-width: 300px;
    margin: 20px auto;
}

.cell {
    aspect-ratio: 1 / 1;
    background: var(--cell-bg);
    border: 1px solid #30363d;
    border-radius: 10px;
    font-size: 40px;
    font-weight: bold;
    color: var(--accent);
    cursor: pointer;
}

.cell:disabled {
    cursor: default;
}

button#restartButton {
    background: var(--accent);
    border: none;
    border-radius: 8px;
    color: white;
    padding: 10px 18px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}

.home-link {
    position: absolute;
    top: 16px;
    left: 16px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
}

.home-link:hover {
    color: var(--text);
}