/* OneLine – theme-aware, neon palette (quizzes.today style) */

#level-select-screen.game-content,
#game-screen.game-content {
    background: var(--surface-color, #161B22);
    color: var(--text-primary, #F8FAFC);
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
}

#level-select-screen h3,
#game-screen h3 {
    margin: 16px 0 12px 0;
    font-size: 1.1rem;
    color: var(--accent, #22d3ee);
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 8px;
    max-width: 520px;
    max-height: 60vh;
    overflow-y: auto;
}

.level-btn {
    width: 44px;
    height: 44px;
    padding: 0;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    border: 2px solid var(--border-color, #475569);
    background: var(--button-bg, #282828);
    color: var(--text-primary, #f8fafc);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.level-btn:hover {
    border-color: var(--accent, #22d3ee);
}

.level-btn.completed {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.2);
    color: #4ade80;
}

.level-btn.completed:hover {
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.4);
}

.stats {
    margin-bottom: 15px;
    font-size: 1.2rem;
    color: var(--accent, #22d3ee);
    font-weight: bold;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.stats button {
    padding: 8px 16px;
    font-size: 0.95rem;
    border-radius: 8px;
    border: 2px solid var(--border-color, #475569);
    background: var(--button-bg, #282828);
    color: var(--accent, #22d3ee);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

.stats button:hover {
    border-color: var(--accent, #22d3ee);
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.4);
}

.oneline-canvas-wrap {
    position: relative;
    touch-action: none;
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface-color, #161B22);
    min-width: 320px;
    min-height: 280px;
    width: 100%;
    max-width: 480px;
}

#oneline-canvas {
    display: block;
    cursor: crosshair;
}

.hint {
    color: var(--text-secondary, #94a3b8);
    font-size: 0.85rem;
    margin-top: 12px;
    text-align: center;
    max-width: 420px;
}

@media (max-width: 640px) {
    .level-grid {
        grid-template-columns: repeat(10, 1fr);
        gap: 6px;
    }
    .level-btn {
        width: 36px;
        height: 36px;
        font-size: 0.8rem;
    }
}