/* Portfolio-matching design system */
:root {
    --bg-primary: #000000;
    --bg-secondary: #050505;
    --bg-tertiary: #0a0a0a;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --text-primary: #fafafa;
    --text-secondary: #b3b3b3;
    --text-tertiary: #6b6b6b;
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-secondary: rgba(255, 255, 255, 0.04);
    --border-hover: rgba(255, 255, 255, 0.12);
    --accent: #6b7280;
    --accent-dimmed: rgba(107, 114, 128, 0.1);
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
}

.font-mono {
    font-family: 'JetBrains Mono', monospace;
}

/* Main Layout */
.app-container {
    display: grid;
    grid-template-areas: 
        "header header header"
        "sidebar canvas info";
    grid-template-columns: 280px 1fr 320px;
    grid-template-rows: 60px 1fr;
    height: 100vh;
    gap: 1px;
    background: var(--border-primary);
}

/* Header */
.header {
    grid-area: header;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.logo {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.simulation-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.control-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.control-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.control-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.speed-slider {
    width: 80px;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.speed-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}


.performance-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* Material Palette Sidebar */
.material-palette {
    grid-area: sidebar;
    background: var(--bg-card);
    padding: 1.5rem;
    overflow-y: auto;
}

.palette-header {
    margin-bottom: 1.5rem;
}

.palette-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.palette-search {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
}

.palette-search:focus {
    outline: none;
    border-color: var(--accent);
}

.material-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.reset-button {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    text-align: center;
}

.reset-button:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.eraser-button {
    background: var(--bg-tertiary) !important;
    border: 1px solid var(--border-primary) !important;
    color: var(--text-primary) !important;
    padding: 0.75rem !important;
    border-radius: 0.375rem !important;
    font-size: 0.875rem !important;
    cursor: pointer !important;
    transition: all 0.2s !important;
    font-weight: 500 !important;
    text-align: center !important;
}

.eraser-button:hover {
    background: var(--bg-card-hover) !important;
    border-color: var(--border-hover) !important;
    transform: translateY(-1px) !important;
}

.eraser-button.selected {
    border-color: var(--accent) !important;
    background: var(--accent-dimmed) !important;
    box-shadow: 0 0 0 1px var(--accent) !important;
}

.resolution-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.resolution-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.resolution-dropdown {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.resolution-dropdown:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.resolution-dropdown:focus {
    outline: none;
    border-color: var(--border-hover);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.05);
}

.resolution-dropdown option {
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 0.5rem;
}

/* Style for original JS-generated buttons */
#palette button {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    padding: 0.75rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
    box-sizing: border-box;
    min-width: 0;
}

#palette button:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

#palette button.selected {
    border-color: var(--accent);
    background: var(--accent-dimmed);
    color: var(--text-primary);
    box-shadow: 0 0 0 1px var(--accent);
}

/* Canvas Area */
.canvas-container {
    grid-area: canvas;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 0;
}

#simulationCanvas {
    border: none;
    cursor: none;
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    background: #000000;
    width: 100%;
    height: 100%;
    display: block;
}

/* Info Panel */
.info-panel {
    grid-area: info;
    background: var(--bg-card);
    padding: 1.5rem;
    overflow-y: hidden;
    max-height: 100vh;
}

.info-section {
    margin-bottom: 2rem;
}

.info-title {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.brush-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.size-slider {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.size-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

.brush-preview {
    width: 100%;
    height: 60px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 0.375rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.brush-circle {
    border: 2px solid var(--accent);
    border-radius: 50%;
    transition: all 0.2s;
}

.visualization-modes {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.viz-mode {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.viz-mode:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

.viz-mode.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.stat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 0.375rem;
    padding: 0.75rem;
    text-align: center;
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.625rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

.advanced-controls {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.advanced-controls .control-btn {
    flex: 1;
    min-width: 0;
    font-size: 0.75rem;
    padding: 0.5rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .app-container {
        grid-template-areas: 
            "header"
            "canvas";
        grid-template-columns: 1fr;
        grid-template-rows: 60px 1fr;
    }
    
    .material-palette,
    .info-panel {
        display: none;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.recording {
    animation: pulse 1s infinite;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 3px;
}

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