:root {
    --bg-primary: #ffffff;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eeeeee;
    --text-primary: #000000;
    --text-secondary: #000000;

    --accent-primary: #0000ff;
    /* Blue */
    --accent-hover: #0000aa;

    --bar-default: #0000ff;
    /* Blue */
    --bar-compare: #000000;
    /* Black for compare */
    --bar-swap: #ff0000;
    /* Red for swap */
    --bar-sorted: #000000;
    /* Black for sorted (or maybe a pattern) */

    --code-bg: #ffffff;
    --code-highlight: #eeeeee;
    --border-color: #000000;

    --font-pixel: 'Press Start 2P', cursive;
    --font-mono: 'JetBrains Mono', monospace;
    /* Use readable mono font for code */

    /* Syntax Highlighting Colors */
    --syntax-keyword: #0000ff;
    /* Blue */
    --syntax-type: #0000aa;
    /* Darker Blue */
    --syntax-comment: #888888;
    /* Grey */
    --syntax-string: #ff0000;
    /* Red */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-pixel);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    font-size: 12px;
    /* Pixel font needs smaller base size */
    line-height: 1.5;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 4px solid var(--border-color);
    margin: 4px;
    height: calc(100% - 8px);
}

header {
    background-color: var(--bg-primary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 4px solid var(--border-color);
    z-index: 1000;
    position: relative;
}

h1 {
    font-size: 1.2rem;
    font-weight: normal;
    color: var(--accent-primary);
    text-shadow: 2px 2px 0px #000000;
    letter-spacing: 1px;
}

.controls {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

label {
    font-size: 0.6rem;
    text-transform: uppercase;
    color: var(--text-primary);
    font-weight: normal;
}

/* Custom Select */
.custom-select {
    position: relative;
    width: 200px;
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    z-index: 100;
}

.select-trigger {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    cursor: pointer;
    box-shadow: 4px 4px 0px var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    transition: transform 0.1s, box-shadow 0.1s;
}

.select-trigger:after {
    content: '';
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--text-primary);
    margin-left: 10px;
}

.select-trigger:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--border-color);
}

.select-options {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-top: none;
    box-shadow: 4px 4px 0px var(--border-color);
    display: none;
    z-index: 100;
    max-height: 200px;
    overflow-y: auto;
}

.custom-select.open .select-options {
    display: block;
}

.option {
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-bottom: 1px solid #eee;
    transition: background-color 0.1s, color 0.1s;
}

.option:last-child {
    border-bottom: none;
}

.option:hover {
    background-color: var(--accent-primary);
    color: white;
}

.option.selected {
    background-color: var(--bg-tertiary);
    font-weight: bold;
}

select {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.5rem;
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    cursor: pointer;
    outline: none;
    box-shadow: 4px 4px 0px var(--border-color);
    appearance: none;
    /* Custom arrow would be nice but keeping simple */
    -webkit-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, black 50%),
        linear-gradient(135deg, black 50%, transparent 50%);
    background-position: calc(100% - 15px) calc(1em + 2px),
        calc(100% - 10px) calc(1em + 2px);
    background-size: 5px 5px,
        5px 5px;
    background-repeat: no-repeat;
    padding-right: 30px;
}

select:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--border-color);
}

.btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 4px 4px 0px var(--border-color);
    transition: transform 0.1s, box-shadow 0.1s;
    text-transform: uppercase;
}

.btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--border-color);
}

.btn.primary {
    background-color: var(--accent-primary);
    color: white;
}

.btn.primary:hover {
    background-color: var(--accent-hover);
}

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

.btn.secondary:hover {
    background-color: var(--bg-tertiary);
}

.btn.icon-btn {
    background-color: white;
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    font-size: 1rem;
}

.btn.icon-btn:hover {
    background-color: var(--bg-tertiary);
}

main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.visualization-section {
    flex: 2;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    border-right: 4px solid var(--border-color);
    position: relative;
    background-color: var(--bg-primary);
    /* Dot pattern background */
    background-image: radial-gradient(#000000 1px, transparent 1px);
    background-size: 20px 20px;
    overflow: hidden;
    /* Prevent expansion */
    min-width: 0;
    /* Flexbox fix */
}

#visualizer-container {
    flex: 1;
    display: flex;
    align-items: flex-end;
    /* justify-content: center; */
    /* gap: 4px; */
    padding-bottom: 3rem;
    width: 100%;
    /* Ensure it fits */
    min-width: 0;
}

#bars-container {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 4px;
    width: 100%;
    transition: height 0.3s;
}

.scrollable-container {
    display: block !important;
    /* Override flex */
    overflow: auto;
    position: relative;
    width: 100% !important;
    height: 100% !important;
}

.scrollable-content {
    width: 3000px;
    height: 100%;
    position: relative;
    margin: 0 auto;
}

.bar {
    width: 40px;
    background-color: var(--bar-default);
    /* Pixel Art Style Borders */
    border-left: 4px solid rgba(255, 255, 255, 0.4);
    border-top: 4px solid rgba(255, 255, 255, 0.4);
    border-right: 4px solid rgba(0, 0, 0, 0.4);
    border-bottom: none;

    transition: height 0.1s, background-color 0.1s;
    position: relative;
    box-shadow: 4px 0px 0px rgba(0, 0, 0, 0.2);
    /* Cursor indicating interactivity */
    cursor: ns-resize;
}

.bar:hover {
    filter: brightness(1.1);
}

.bar.dragging {
    background-color: var(--accent-primary) !important;
    box-shadow: 0 0 10px var(--accent-primary);
    z-index: 100;
}

.bar-label {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.6rem;
    color: var(--text-primary);
    font-family: var(--font-pixel);
}

/* Tree Visualization */
.tree-node {
    position: absolute;
    width: 36px;
    height: 36px;
    background-color: white;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    box-shadow: 4px 4px 0px var(--border-color);
    transition: all 0.3s ease;
    z-index: 2;
}

.tree-node.compare {
    background-color: var(--bar-compare);
    /* Black */
    color: white;
    transform: scale(1.1);
}

.tree-node.sorted {
    background-color: var(--bar-sorted);
    color: white;
}

.tree-node.active {
    background-color: var(--bar-swap);
    /* Red */
    color: white;
}

.tree-edge {
    stroke: var(--border-color);
    stroke-width: 2;
    opacity: 1;
    transition: stroke 0.3s;
    stroke-dasharray: 4 2;
    /* Dashed lines for retro feel */
}

.bar.compare {
    background-color: var(--bar-compare);
    border-color: var(--bar-compare);
}

.bar.swap {
    background-color: var(--bar-swap);
    border-color: var(--border-color);
}

.bar.sorted {
    background-color: var(--bar-sorted);
    border-color: var(--bar-sorted);
    background-image: linear-gradient(45deg, #000 25%, transparent 25%, transparent 50%, #000 50%, #000 75%, transparent 75%, transparent);
    background-size: 4px 4px;
}

.stats-panel {
    display: flex;
    gap: 3rem;
    justify-content: center;
    padding: 1rem 2rem;
    background-color: white;
    border: 2px solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
    margin-top: auto;
}

.stat-item {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.stat-item .label {
    color: var(--text-primary);
    font-size: 0.6rem;
}

.stat-item .value {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    color: var(--accent-primary);
}

.info-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    min-width: 400px;
    border-left: 4px solid var(--border-color);
}

.code-panel {
    flex: 2;
    display: flex;
    flex-direction: column;
    border-bottom: 4px solid var(--border-color);
    overflow: hidden;
}

.panel-header {
    padding: 1rem 1.5rem;
    background-color: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
}

.panel-header h3 {
    font-size: 0.7rem;
    color: var(--text-primary);
    text-transform: uppercase;
}

.code-container {
    flex: 1;
    overflow-y: auto;
    background-color: var(--code-bg);
    padding: 1.5rem;
    font-family: var(--font-mono);
    /* Switch to JetBrains Mono */
    font-size: 0.9rem;
    /* Larger font size */
    line-height: 1.6;
}

.code-line {
    display: block;
    padding: 0 0.5rem;
    color: var(--text-primary);
    margin-bottom: 0;
    /* Remove margin for tighter code look */
    white-space: pre;
    /* Preserve whitespace */
}

.code-line .line-num {
    display: inline-block;
    width: 30px;
    color: #aaa;
    text-align: right;
    margin-right: 16px;
    user-select: none;
    font-size: 0.8rem;
}

.code-line.active {
    background-color: #e0e0ff;
    /* Light blue highlight */
    color: black;
    font-weight: bold;
}

.code-line.active .line-num {
    color: var(--accent-primary);
    font-weight: bold;
}

/* Syntax Highlighting Classes */
.token-keyword {
    color: var(--syntax-keyword);
    font-weight: bold;
}

.token-type {
    color: var(--syntax-type);
    font-weight: bold;
}

.token-comment {
    color: var(--syntax-comment);
    font-style: italic;
}

.token-string {
    color: var(--syntax-string);
}

.complexity-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
}

.complexity-grid {
    padding: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.complexity-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background-color: white;
    border: 2px solid var(--border-color);
    box-shadow: 4px 4px 0px var(--border-color);
}

.complexity-item .label {
    font-size: 0.5rem;
    text-transform: uppercase;
    color: var(--text-primary);
}

.complexity-item .value {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    color: var(--accent-primary);
}

/* Slider styling */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 120px;
    height: 10px;
    background: white;
    border: 2px solid black;
    outline: none;
    box-shadow: 2px 2px 0px black;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid black;
    box-shadow: 2px 2px 0px black;
    transition: transform 0.1s;
}

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

/* Resizers */
.resizer-vertical {
    width: 8px;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-top: none;
    border-bottom: none;
    cursor: col-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    transition: background-color 0.2s;
}

.resizer-vertical:hover,
.resizer-vertical.active {
    background-color: var(--accent-primary);
}

.resizer-horizontal {
    height: 8px;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-left: none;
    border-right: none;
    cursor: row-resize;
    z-index: 20;
    transition: background-color 0.2s;
}

.resizer-horizontal:hover,
.resizer-horizontal.active {
    background-color: var(--accent-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-left: 2px solid black;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border: 2px solid black;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover);
}