.controls {
    display: flex;
    align-items: center;
    gap: 1.25rem 2rem;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 100%;
}

.controls .action-buttons {
    flex-shrink: 0;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.control-group label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 500;
}

.slider-stack {
    display: flex;
    flex-direction: row;
    gap: 1.5rem;
    flex: 0 0 auto;
}

@media (max-width: 1100px) {
    .slider-stack {
        flex-direction: column;
        gap: 0.25rem;
    }
}

select,
input[type="number"] {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    outline: none;
    transition: all var(--transition);
    cursor: pointer;
    min-width: 120px;
}

select:hover,
select:focus,
input[type="number"]:hover,
input[type="number"]:focus {
    border-color: var(--text-muted);
}

input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 120px;
    height: 8px;
    background: var(--slider-track);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    padding: 0;
    margin: 8px 0;
    touch-action: pan-x;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--slider-thumb);
    cursor: pointer;
    transition: transform 0.15s;
    box-shadow: 0 2px 6px var(--shadow);
    border: 2px solid var(--bg-secondary);
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

input[type=range]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--slider-thumb);
    cursor: pointer;
    transition: transform 0.15s;
    box-shadow: 0 2px 6px var(--shadow);
    border: 2px solid var(--bg-secondary);
}

input[type=range]::-moz-range-thumb:hover {
    transform: scale(1.1);
}

input[type=range]::-moz-range-track {
    height: 8px;
    background: var(--slider-track);
    border-radius: 4px;
}

.btn {
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition);
}

.btn.primary {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.btn.primary:hover {
    opacity: 0.85;
}

.btn.secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn.secondary:hover {
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn.small {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
}

.btn.stop {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.btn.stop:hover:not(:disabled) {
    background: #e74c3c;
    border-color: #e74c3c;
    color: #ffffff;
}

.btn.stop:disabled {
    opacity: 0.3;
}

.separator {
    width: 1px;
    height: 24px;
    background: var(--border-color);
}


.time-travel-scrubber {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin: 1rem 0;
    width: 100%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

#main-scrubber-wrap {
    position: absolute;
    bottom: 2rem;
    left: 4rem;
    right: 4rem;
    width: auto;
    margin: 0;
    z-index: 50;
}

.scrubber-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    margin-bottom: 0.6rem;
    font-weight: 700;
}


.time-travel-scrubber input[type=range] {
    width: 100%;
    max-width: none;
    height: 6px;
    margin: 12px 0;
}

.time-travel-scrubber input[type=range]::-webkit-slider-thumb {
    width: 20px;
    height: 20px;
    border: 3px solid var(--bg-primary);
}

.time-travel-scrubber input[type=range]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border: 3px solid var(--bg-primary);
}

.scrubber-icon {
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-muted);
    opacity: 0.7;
}

@media (max-width: 1400px) {
    .header-content {
        flex-wrap: wrap;
        align-items: center;
        row-gap: 0.5rem;
    }

    
    h1 {
        order: 1;
        flex: 0 1 auto;
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .header-actions {
        order: 2;
        flex: 1 1 auto;
        justify-content: flex-end;
        margin-left: auto;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        flex-wrap: nowrap;
    }

    
    .tabs {
        order: 3;
        flex: 0 1 100%;
        max-width: fit-content;
        margin: 0.25rem auto 0;
        -webkit-overflow-scrolling: touch;
    }
}

@media (max-width: 1180px) {
    .account-slot {
        --account-slot-width: 150px;
    }

    .header-actions {
        gap: 0.5rem;
    }

    .profile-btn,
    .docs-link,
    .pwa-install-btn,
    .auth-link {
        padding: 0.4rem 0.65rem;
        font-size: 0.72rem;
        white-space: nowrap;
    }

    .theme-label {
        display: none;
    }
}

@media (max-width: 1100px) {
    
    .toolbar .controls {
        gap: 0.75rem 1.25rem;
    }

    .toolbar .controls .separator {
        display: none;
    }
}

@media (max-width: 768px) {
    .account-slot {
        --account-slot-width: 132px;
    }

    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 0.5rem;
    }

    h1 {
        font-size: 1.25rem;
        margin: 0;
    }

    .header-actions {
        gap: 0.5rem;
    }

    .tabs {
        overflow-x: auto;
        white-space: nowrap;
        padding: 0 0 0.5rem 0;
        margin-bottom: 0.5rem;
        -webkit-overflow-scrolling: touch;
        justify-content: flex-start;
        border-bottom: 2px solid var(--border-color);
    }

    .tab-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
        flex: 0 0 auto;
    }

    .toolbar .controls {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
        align-items: center;
    }

    .toolbar .controls > .control-group:first-child {
        grid-column: span 2;
    }

    .toolbar .controls > .slider-stack {
        grid-column: span 2;
    }

    .toolbar .controls > .separator {
        display: none;
    }

    .control-group {
        display: flex;
        flex-direction: column;
        width: 100%;
    }

    .toolbar .controls > .action-buttons {
        grid-column: span 2;
        flex-direction: row;
        gap: 0.5rem;
    }

    main .btn {
        flex: 1;
        min-height: 40px;
        font-size: 0.9rem;
        padding: 0.5rem;
    }

    input[type="range"] {
        height: 6px;
        margin: 12px 0;
        width: 100%;
    }

    input[type="range"]::-webkit-slider-thumb {
        width: 20px;
        height: 20px;
        margin-top: -7px;
    }

    #visualizer-container {
        padding: 0.5rem;
        flex-grow: 1;
        min-height: 60vh;
        
        padding-bottom: 5rem;
    }

    .separator {
        display: none;
    }

    .keyboard-hints {
        display: none;
    }

    
    #main-scrubber-wrap {
        left: 0.5rem;
        right: 0.5rem;
        bottom: 0.75rem;
    }

    .advanced-options {
        margin-top: 0.5rem;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    .toolbar .controls {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }

    .separator {
        display: none;
    }

    #visualizer-container {
        padding: 2rem 2rem 0;
        min-height: 400px;
    }
}

@media (max-width: 480px) {
    main {
        padding: 0.5rem;
        max-width: 100%;
        overflow-x: hidden;
    }

    h1 {
        font-size: 1.25rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 100%;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    select,
    input[type="number"] {
        min-width: 0;
        max-width: 100%;
    }

    .stats {
        flex-wrap: wrap;
        gap: 0.25rem 0.5rem;
        font-size: 0.7rem;
        word-break: break-word;
        max-width: 100%;
    }

    .checkbox-grid {
        grid-template-columns: 1fr;
    }

    .control-group {
        width: 100%;
    }

    .control-group label {
        font-size: 0.8rem;
    }

    .benchmark-config,
    .algo-selection,
    .table-controls {
        padding: 0.75rem;
    }

    .compare-grid {
        grid-template-columns: 1fr;
    }

    .analytics-grid {
        grid-template-columns: 1fr;
    }

    .compare-controls {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .compare-config {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }

    .compare-actions {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }

    .compare-actions .btn {
        flex: 1;
        min-width: 80px;
    }

    .compare-panel {
        height: 230px;
        padding: 0.75rem;
    }

    .compare-visualizer {
        min-height: 0;
    }

    .panel-header {
        gap: 0.25rem;
    }

    .algo-select {
        font-size: 0.8rem;
        padding: 0.3rem;
    }

    .panel-stats {
        font-size: 0.65rem;
    }

    .race-timer {
        font-size: 1rem;
        padding: 0.3rem 0.75rem;
    }

    .leaderboard {
        padding: 1rem;
    }

    .leaderboard-item {
        padding: 0.5rem 0.75rem;
        gap: 0.5rem;
    }
}