.cartpole-wrapper {
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.canvas-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.canvas-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.eyebrow {
    margin: 0 0 4px 0;
    text-transform: uppercase;
    letter-spacing: 1.1px;
    font-size: 12px;
    color: #64748b;
    font-weight: 700;
}

.canvas-header h3 {
    margin: 0;
    color: #0f172a;
    font-size: 22px;
}

.subtitle {
    margin: 4px 0 0 0;
    color: #475569;
    font-size: 14px;
}

.primary-btn {
    background: #2563eb;
    color: #ffffff;
    border: none;
    border-radius: 10px;
    padding: 10px 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
    transition: background 0.15s ease, transform 0.15s ease;
}

.primary-btn:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.canvas-shell {
    background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
    border: 1px solid #dbeafe;
    border-radius: 10px;
    padding: 12px;
}

#cartpole-canvas {
    width: 100%;
    height: 300px;
    display: block;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    background: #f8fafc;
}

.canvas-legend {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 10px;
    color: #475569;
    font-size: 12px;
}

.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #e2e8f0;
    padding: 6px 10px;
    border-radius: 8px;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.legend-dot.left {
    background: #eab308;
}

.legend-dot.right {
    background: #22c55e;
}

.legend-dot.danger {
    background: #ef4444;
}

.metrics-section {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04);
}

.metrics-section h4 {
    margin: 0 0 6px 0;
    color: #0f172a;
}

.metric-hint {
    margin: 0 0 12px 0;
    color: #64748b;
    font-size: 13px;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
}

.metriclabel {
    margin: 0;
    min-height: 64px;
}

@media (max-width: 800px) {
    .canvas-header {
        flex-direction: column;
    }

    #cartpole-canvas {
        height: 240px;
    }
}

/* Competition Leaderboard Styles */
.leaderboard-panel {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}

.panel-title {
    font-size: 18px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
    text-align: center;
}

.leaderboard-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 8px;
    background: #f1f5f9;
    border-radius: 8px;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #94a3b8;
    animation: pulse 2s infinite;
}

.status-indicator.connected {
    background: #10b981;
}

.status-indicator.disconnected {
    background: #ef4444;
    animation: none;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.leaderboard-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.your-position {
    padding: 12px;
    background: #eff6ff;
    border: 2px solid #3b82f6;
    border-radius: 8px;
    font-size: 14px;
    color: #1e40af;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.leaderboard-entry {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    transition: background 0.2s ease;
}

.leaderboard-entry.highlight {
    background: #fef3c7;
    border-color: #fbbf24;
    font-weight: 600;
}

.leaderboard-rank {
    font-size: 18px;
    font-weight: 700;
    color: #6366f1;
    min-width: 40px;
}

.leaderboard-user {
    flex: 1;
    font-size: 14px;
    color: #0f172a;
}

.leaderboard-scores {
    font-size: 14px;
    color: #64748b;
    font-weight: 600;
}

.empty-leaderboard {
    padding: 20px;
    text-align: center;
    color: #94a3b8;
    font-style: italic;
}

.leaderboard-separator {
    text-align: center;
    color: #94a3b8;
    font-size: 18px;
    padding: 4px 0;
}