/* ============================================
   Sorting Algorithm Visualizer - Styles
   ============================================ */

/* --- Control Panel --- */
.control-panel {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 16px;
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px 24px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
    transition: all var(--transition-speed) ease;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 120px;
}

.control-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.8;
}

.control-label i {
    color: var(--primary-color);
}

.control-value {
    margin-left: auto;
    background: rgba(0, 122, 255, 0.1);
    padding: 0 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.control-select {
    padding: 10px 14px;
    border: 1px solid rgba(0, 122, 255, 0.2);
    border-radius: 8px;
    background: var(--background-color);
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    min-width: 150px;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23007AFF' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.control-select:hover {
    border-color: var(--primary-color);
}

.control-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.control-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(0, 122, 255, 0.2);
    outline: none;
    transition: background var(--transition-speed);
}

.control-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
    transition: transform 0.15s ease;
}

.control-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.control-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.3);
}

.control-actions {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    margin-left: auto;
}

/* --- Action Buttons --- */
.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.btn-action i {
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: rgba(0, 122, 255, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(0, 122, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(0, 122, 255, 0.2);
    transform: translateY(-1px);
}

.btn-warning {
    background: linear-gradient(135deg, #f59e0b, #f97316);
    color: white;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

/* --- Visualization Area --- */
.viz-section {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 0 20px;
}

.viz-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
    min-height: 340px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-speed) ease;
}

.chart-area {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 300px;
    gap: 2px;
    padding: 0 4px;
}

/* --- Individual Bars --- */
.bar {
    flex: 1;
    min-width: 2px;
    border-radius: 3px 3px 0 0;
    transition: height 0.12s ease-out, background-color 0.15s ease, opacity 0.2s ease;
    position: relative;
    cursor: pointer;
}

.bar::after {
    content: '';
    position: absolute;
    top: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s;
}

.bar:hover::after {
    opacity: 1;
    background: var(--text-color);
}

/* Bar States */
.bar-default {
    background: linear-gradient(to top, #007AFF, #5AC8FA);
}

.bar-comparing {
    background: linear-gradient(to top, #f59e0b, #fbbf24);
    animation: pulse-bar 0.4s ease-in-out infinite alternate;
}

.bar-swapping {
    background: linear-gradient(to top, #ef4444, #f87171);
    animation: shake-bar 0.3s ease-in-out;
}

.bar-sorted {
    background: linear-gradient(to top, #10b981, #34d399);
    opacity: 0.85;
}

.bar-pivot {
    background: linear-gradient(to top, #8b5cf6, #a78bfa);
    animation: glow-bar 0.8s ease-in-out infinite alternate;
}

/* Bar Animations */
@keyframes pulse-bar {
    from { transform: scaleY(1); }
    to   { transform: scaleY(1.03); }
}

@keyframes shake-bar {
    0%, 100% { transform: translateX(0); }
    25%      { transform: translateX(-2px); }
    75%      { transform: translateX(2px); }
}

@keyframes glow-bar {
    from { box-shadow: 0 0 5px rgba(139, 92, 246, 0.3); }
    to   { box-shadow: 0 0 15px rgba(139, 92, 246, 0.6); }
}

/* --- Info Bar (Stats + Legend) --- */
.info-bar {
    max-width: 1200px;
    margin: 16px auto 0;
    padding: 0 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.stats-panel {
    flex: 2;
    min-width: 280px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 16px 20px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
}

.stat-item {
    flex: 1;
    min-width: 100px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.stat-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 122, 255, 0.1);
    border-radius: 8px;
    color: var(--primary-color);
    font-size: 0.85rem;
    flex-shrink: 0;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-color);
    opacity: 0.7;
}

.stat-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-color);
    margin-left: auto;
    font-variant-numeric: tabular-nums;
}

.legend-panel {
    flex: 1;
    min-width: 200px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 16px 20px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-color);
    opacity: 0.85;
}

.legend-color {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    flex-shrink: 0;
}

.legend-default   { background: linear-gradient(135deg, #007AFF, #5AC8FA); }
.legend-comparing { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.legend-swapping  { background: linear-gradient(135deg, #ef4444, #f87171); }
.legend-sorted    { background: linear-gradient(135deg, #10b981, #34d399); }
.legend-pivot     { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }

/* --- Step Description --- */
.step-description {
    max-width: 1200px;
    margin: 16px auto 40px;
    padding: 0 20px;
}

.step-content {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 18px 24px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.95rem;
    color: var(--text-color);
    font-weight: 500;
    transition: all var(--transition-speed) ease;
}

.step-icon {
    color: var(--primary-color);
    opacity: 0.4;
    font-size: 1rem;
}

#step-text {
    flex: 1;
    line-height: 1.6;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .control-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        padding: 16px;
    }

    .control-group {
        min-width: unset;
    }

    .control-actions {
        flex-direction: row;
        flex-wrap: wrap;
        margin-left: unset;
        justify-content: center;
    }

    .btn-action {
        flex: 1;
        justify-content: center;
        min-width: 80px;
        padding: 10px 12px;
        font-size: 0.85rem;
    }

    .viz-container {
        padding: 12px;
        min-height: 260px;
    }

    .chart-area {
        height: 240px;
        gap: 2px;
    }

    .stats-panel {
        padding: 12px 16px;
    }

    .stat-item {
        min-width: 80px;
    }

    .legend-panel {
        padding: 12px 16px;
        gap: 8px 12px;
    }

    .step-content {
        padding: 14px 18px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .chart-area {
        height: 200px;
        gap: 1px;
    }

    .control-actions .btn-action span {
        display: none;
    }

    .btn-action {
        min-width: 44px;
        padding: 10px;
        justify-content: center;
    }

    .btn-action i {
        font-size: 1.1rem;
        margin: 0;
    }

    .stat-value {
        font-size: 0.9rem;
    }

    .legend-item {
        font-size: 0.75rem;
    }
}

/* --- Dark mode adjustments --- */
.dark-mode .control-row,
.dark-mode .viz-container,
.dark-mode .stats-panel,
.dark-mode .legend-panel,
.dark-mode .step-content {
    border-color: rgba(255, 255, 255, 0.08);
}

.dark-mode .control-select {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.dark-mode .control-select option {
    background-color: #1a1a2e;
    color: #e0e0e0;
}

.dark-mode .control-select option:hover,
.dark-mode .control-select option:checked {
    background-color: #16213e;
    color: #ffffff;
}

.dark-mode .control-slider {
    background: rgba(255, 255, 255, 0.15);
}

.dark-mode .btn-secondary {
    background: rgba(0, 122, 255, 0.2);
    border-color: rgba(0, 122, 255, 0.3);
}

.dark-mode .btn-secondary:hover {
    background: rgba(0, 122, 255, 0.3);
}

.dark-mode .stat-icon {
    background: rgba(0, 122, 255, 0.2);
}

/* --- Disabled interaction overlay --- */
.viz-container.viz-disabled::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(128, 128, 128, 0.05);
    pointer-events: none;
}

/* --- Mode Toggle Row --- */
.mode-toggle-row {
    margin-top: 12px;
}

.mode-toggle-row .control-group {
    align-items: center;
}

.btn-mode-toggle {
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    transition: all 0.3s ease;
}

.btn-mode-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

/* --- Race Container --- */
.race-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
    min-height: 340px;
    transition: all var(--transition-speed) ease;
}

.race-setup-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: rgba(0, 122, 255, 0.05);
    border-radius: 8px;
}

.race-algos-select {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    flex: 1;
}

.race-checkbox {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-color);
    cursor: pointer;
    padding: 3px 8px;
    border-radius: 6px;
    transition: background 0.2s;
}

.race-checkbox:hover {
    background: rgba(0, 122, 255, 0.08);
}

.race-checkbox input[type="checkbox"] {
    accent-color: var(--primary-color);
}

/* Race Grid */
.race-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.race-chart-column {
    background: rgba(0, 0, 0, 0.03);
    border-radius: 8px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    transition: background 0.3s;
}

.dark-mode .race-chart-column {
    background: rgba(255, 255, 255, 0.05);
}

.race-chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
    margin-bottom: 6px;
}

.race-algo-name {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-color);
}

.btn-sm {
    padding: 4px 8px;
    font-size: 0.75rem;
    gap: 4px;
    min-width: unset;
}

.race-chart-info {
    display: flex;
    gap: 4px 8px;
    flex-wrap: wrap;
    margin-bottom: 6px;
    font-size: 0.7rem;
}

.race-stat {
    display: inline-flex;
    gap: 2px;
}

.race-stat-label {
    opacity: 0.6;
    font-weight: 500;
    color: var(--text-color);
}

.race-stat-val {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--text-color);
}

.race-chart {
    flex: 1;
    display: flex;
    align-items: flex-end;
    gap: 1px;
    height: 200px;
    min-height: 200px;
}

.race-chart .bar {
    min-width: 1px;
    border-radius: 2px 2px 0 0;
    transition: height 0.1s ease-out, background-color 0.12s ease;
}

.race-chart .bar-default {
    background: linear-gradient(to top, #007AFF, #5AC8FA);
}

.race-chart .bar-comparing {
    background: linear-gradient(to top, #f59e0b, #fbbf24);
}

.race-chart .bar-swapping {
    background: linear-gradient(to top, #ef4444, #f87171);
}

.race-chart .bar-sorted {
    background: linear-gradient(to top, #10b981, #34d399);
    opacity: 0.85;
}

/* --- Comparison Table --- */
.comparison-table-section {
    max-width: 1200px;
    margin: 24px auto 0;
    padding: 0 20px;
}

.comparison-table-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid rgba(0, 122, 255, 0.1);
    transition: all var(--transition-speed) ease;
}

.comparison-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.comparison-title i {
    color: #f59e0b;
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table-wrapper table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.comparison-table-wrapper th,
.comparison-table-wrapper td {
    padding: 10px 12px;
    text-align: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    color: var(--text-color);
}

.dark-mode .comparison-table-wrapper th,
.dark-mode .comparison-table-wrapper td {
    border-color: rgba(255, 255, 255, 0.08);
}

.comparison-table-wrapper th {
    font-weight: 700;
    background: rgba(0, 122, 255, 0.05);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-table-wrapper tbody tr:hover {
    background: rgba(0, 122, 255, 0.04);
}

.comparison-table-wrapper .winner-row {
    background: rgba(16, 185, 129, 0.08);
}

.comparison-table-wrapper .winner-row:hover {
    background: rgba(16, 185, 129, 0.12);
}

.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    margin-right: 6px;
    background: rgba(0, 0, 0, 0.08);
    color: var(--text-color);
}

.winner-row .rank-badge {
    background: #10b981;
    color: white;
}

.dark-mode .rank-badge {
    background: rgba(255, 255, 255, 0.15);
}

.dark-mode .winner-row .rank-badge {
    background: #10b981;
    color: white;
}

/* --- Code Modal --- */
.code-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.code-modal-overlay.open {
    display: flex;
}

.code-modal {
    background: var(--card-background);
    border-radius: 16px;
    width: 100%;
    max-width: 720px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.code-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.dark-mode .code-modal-header {
    border-color: rgba(255, 255, 255, 0.08);
}

.code-modal-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-color);
    margin: 0;
}

.code-modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    opacity: 0.5;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.2s;
    line-height: 1;
}

.code-modal-close:hover {
    opacity: 1;
    background: rgba(0, 0, 0, 0.06);
}

.dark-mode .code-modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.code-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

.code-tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: 0 24px;
    background: rgba(0, 0, 0, 0.02);
    overflow-x: auto;
}

.dark-mode .code-tabs {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.08);
}

.code-tab {
    padding: 12px 16px;
    border: none;
    background: none;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.5;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    white-space: nowrap;
}

.code-tab:hover {
    opacity: 0.8;
}

.code-tab.active {
    opacity: 1;
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
}

.code-content {
    padding: 0;
}

.code-block {
    display: none;
    margin: 0;
    padding: 20px 24px;
    font-size: 0.85rem;
    line-height: 1.65;
    overflow-x: auto;
    background: rgba(0, 0, 0, 0.03);
    color: var(--text-color);
    max-height: 400px;
    overflow-y: auto;
}

.dark-mode .code-block {
    background: rgba(255, 255, 255, 0.04);
}

.code-block.active {
    display: block;
}

.code-block code {
    font-family: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', 'Consolas', monospace;
    white-space: pre;
}

.code-modal-footer {
    display: flex;
    justify-content: flex-end;
    padding: 14px 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.dark-mode .code-modal-footer {
    border-color: rgba(255, 255, 255, 0.08);
}

/* Dark mode race container */
.dark-mode .race-container {
    border-color: rgba(255, 255, 255, 0.08);
}

.dark-mode .race-setup-bar {
    background: rgba(255, 255, 255, 0.04);
}

.dark-mode .comparison-table-container {
    border-color: rgba(255, 255, 255, 0.08);
}

/* Responsive race grid */
@media (max-width: 768px) {
    .race-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 8px;
    }

    .race-chart {
        height: 140px;
        min-height: 140px;
    }

    .race-setup-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .race-chart-info {
        font-size: 0.65rem;
    }

    .code-modal {
        max-width: 100%;
        max-height: 90vh;
        border-radius: 12px;
        margin: 10px;
    }

    .code-block {
        padding: 14px 16px;
        font-size: 0.8rem;
    }
}