/* ========================================
   Compare Mode
   ======================================== */

#section-compare {
    display: none;
    padding: 2rem;
    overflow-y: auto;
    background: var(--bg-primary);
}

#section-compare.active-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.compare-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.compare-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.compare-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.compare-controls {
    display: flex;
    gap: 2rem;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    background: var(--bg-secondary);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.compare-config {
    display: flex;
    gap: 1.5rem;
}

.compare-actions {
    display: flex;
    gap: 0.75rem;
}

.race-count {
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
}

.race-count span {
    color: var(--bar-compare);
    font-weight: 600;
}

.compare-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 0.75rem;
    width: 100%;
    margin-top: 1rem;
    padding-bottom: 2rem;
}

.compare-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    height: 280px;
    position: relative;
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
}

.compare-panel:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.compare-panel .remove-panel {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    opacity: 0.6;
    transition: all 0.2s;
}

.compare-panel .remove-panel:hover {
    opacity: 1;
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
}

.compare-panel.winner {
    border-color: var(--bar-sorted);
    box-shadow: 0 0 20px rgba(46, 204, 113, 0.3);
}

.compare-panel.rank-1 {
    border-color: #ffd700;
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.3);
}

.compare-panel.rank-2 {
    border-color: #c0c0c0;
    box-shadow: 0 0 10px rgba(192, 192, 192, 0.3);
}

.compare-panel.rank-3 {
    border-color: #cd7f32;
    box-shadow: 0 0 10px rgba(205, 127, 50, 0.3);
}

.panel-rank {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    border: 2px solid var(--border-color);
}

.rank-1 .panel-rank {
    border-color: #ffd700;
    color: #ffd700;
}

.rank-2 .panel-rank {
    border-color: #c0c0c0;
    color: #c0c0c0;
}

.rank-3 .panel-rank {
    border-color: #cd7f32;
    color: #cd7f32;
}

/* Leaderboard */
.leaderboard {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    margin-top: 1rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.leaderboard h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-align: center;
    color: var(--text-primary);
}

.leaderboard-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.leaderboard-table th {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.leaderboard-table td {
    color: var(--text-secondary);
    font-family: 'SF Mono', 'Consolas', monospace;
}

.leaderboard-table td:first-child {
    font-weight: 700;
    color: var(--text-primary);
}

.leaderboard-table td:nth-child(2) {
    font-family: inherit;
    color: var(--text-primary);
}

.leaderboard-table .winner-row {
    background: rgba(46, 204, 113, 0.1);
}

.leaderboard-table .winner-row td {
    color: var(--bar-sorted);
    font-weight: 600;
}

.leaderboard-table .winner-row td:first-child::before {
    content: '#1 ';
}

.compare-result.has-leaderboard {
    background: transparent;
    padding: 0;
}

.val-time {
    color: var(--accent) !important;
    font-weight: 600;
}

/* Panel Header / Stats */
.panel-header {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-right: 1.5rem;
}

.algo-select {
    flex: 1;
    min-width: 140px;
    font-size: 0.85rem;
    padding: 0.4rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    cursor: pointer;
}

.panel-stats {
    display: flex;
    gap: 0.75rem;
    font-size: 0.7rem;
}

.panel-stats .stat {
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Compare Visualizer */
.compare-visualizer {
    flex: 1 1 0;
    min-height: 0;
    display: block;
    position: relative;
    overflow: hidden;
}

.compare-visualizer canvas.race-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
}

.compare-visualizer .bar {
    flex: 1 1 0;
    min-width: 0;
    background: var(--bar-default);
    margin: 0;
    border-radius: 0;
    opacity: 0.8;
    transition: height 0.05s ease-out, background-color 0.1s;

    box-shadow: 1px 0 0 0 var(--bar-default);
}

.compare-visualizer .bar.compare {
    background: var(--bar-compare) !important;
    box-shadow: 1px 0 0 0 var(--bar-compare);
    opacity: 1;
    z-index: 10;
}

.compare-visualizer .bar.swap {
    background: var(--bar-swap) !important;
    box-shadow: 1px 0 0 0 var(--bar-swap);
    opacity: 1;
    z-index: 10;
}

.compare-visualizer .bar.sorted {
    background: var(--bar-sorted) !important;
    box-shadow: 1px 0 0 0 var(--bar-sorted);
    opacity: 1;
}

.compare-divider {
    width: 2px;
    background: var(--border-color);
    margin: 0 0.5rem;
}

.panel-status {
    text-align: center;
    padding-top: 0.75rem;
    margin-top: 0.75rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.panel-status.running {
    color: var(--bar-compare);
}

.panel-status.done {
    color: var(--bar-sorted);
}

.compare-result {
    margin-top: 1.5rem;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    font-size: 1rem;
    color: var(--text-secondary);
}

.compare-result.winner-1 {
    border-color: var(--bar-sorted);
    color: var(--bar-sorted);
}

.compare-result.winner-2 {
    border-color: var(--bar-sorted);
    color: var(--bar-sorted);
}

.remove-panel-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 1.2rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    padding: 0;
}

.remove-panel-btn:hover {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
}

/* Race Leaderboard */
.race-leaderboard {
    margin-top: 1.5rem;
    width: 100%;
    max-width: 600px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.race-leaderboard h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    transition: transform 0.2s;
}

.leaderboard-item:hover {
    transform: translateX(4px);
}

.leaderboard-rank {
    font-weight: 700;
    font-size: 1.25rem;
    min-width: 2rem;
}

.leaderboard-item:nth-child(1) .leaderboard-rank {
    color: #ffd700;
}

.leaderboard-item:nth-child(2) .leaderboard-rank {
    color: #c0c0c0;
}

.leaderboard-item:nth-child(3) .leaderboard-rank {
    color: #cd7f32;
}

.leaderboard-name {
    flex: 1;
    color: var(--text-primary);
    font-weight: 500;
}

.leaderboard-time {
    font-family: 'SF Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Race Timer */
.race-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    min-width: 120px;
    justify-content: center;
}

#race-elapsed {
    color: var(--bar-compare);
}

/* Custom array override in compare */
.custom-array-group {
    margin-top: 0.5rem;
}

.custom-array-wrapper {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.custom-array-wrapper input[type="text"] {
    flex: 1;
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.custom-array-wrapper input[type="text"]::placeholder {
    color: var(--text-muted);
}