/* Cellular Automata Simulator - Dark Theme
 * Constraint Theory Research Project
 */

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent: #4CAF50;
    --accent-hover: #45a049;
    --danger: #f85149;
    --danger-hover: #da3633;
    --border: #30363d;
    --input-bg: #0d1117;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial,
        sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Main Content Layout */
.main-content {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 30px;
    flex: 1;
}

/* Control Panel */
.controls {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    height: fit-content;
    position: sticky;
    top: 20px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
}

.control-section {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.control-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.control-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.control-section label {
    display: block;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.control-section select,
.control-section input[type="text"] {
    width: 100%;
    padding: 8px 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.control-section select:focus,
.control-section input[type="text"]:focus {
    outline: none;
    border-color: var(--accent);
}

.control-section input[type="range"] {
    width: 100%;
    margin-bottom: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.custom-rule {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--bg-tertiary);
    border-radius: 6px;
}

.custom-rule.hidden {
    display: none;
}

.custom-rule label {
    margin-bottom: 8px;
}

.custom-rule input {
    width: 100%;
    padding: 6px 10px;
    margin-bottom: 10px;
}

#applyCustomRule {
    width: 100%;
    padding: 8px;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s;
}

#applyCustomRule:hover {
    background-color: var(--accent-hover);
}

/* Tool Buttons */
.tool-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.tool-btn {
    padding: 10px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.tool-btn:hover {
    background-color: var(--border);
}

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

/* Pattern Selection */
.pattern-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 8px;
    font-style: italic;
}

/* Simulation Buttons */
.sim-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.sim-buttons button {
    padding: 12px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.primary-btn {
    background-color: var(--accent);
    color: white;
    grid-column: 1 / -1;
}

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

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

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

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

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

/* Statistics */
.stats {
    background-color: var(--bg-tertiary);
    padding: 15px;
    border-radius: 6px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.stat-row:last-child {
    margin-bottom: 0;
}

.stat-row span:first-child {
    color: var(--text-secondary);
}

.stat-row span:last-child {
    font-weight: 600;
    color: var(--text-primary);
}

/* Population Graph */
#populationGraph {
    width: 100%;
    height: 100px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    display: block;
}

/* Canvas Container */
.canvas-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.canvas-wrapper {
    position: relative;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
}

#automataCanvas {
    background-color: #1a1a1a;
    border: 2px solid var(--border);
    border-radius: 4px;
    cursor: crosshair;
    image-rendering: pixelated;
}

/* Canvas Overlay */
.canvas-overlay {
    position: absolute;
    top: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.zoom-controls {
    display: flex;
    gap: 5px;
}

.zoom-controls button {
    width: 36px;
    height: 36px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.zoom-controls button:hover {
    background-color: var(--border);
}

.coordinates {
    background-color: var(--bg-tertiary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
    border: 1px solid var(--border);
}

/* Info Panel */
.info-panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}

.info-panel h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.info-panel h4 {
    font-size: 1rem;
    margin-top: 15px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.info-panel p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.7;
}

.info-panel a {
    color: var(--accent);
    text-decoration: none;
}

.info-panel a:hover {
    text-decoration: underline;
}

.info-panel ul {
    margin-left: 20px;
    color: var(--text-secondary);
}

.info-panel li {
    margin-bottom: 6px;
}

.info-panel strong {
    color: var(--text-primary);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    margin-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 280px 1fr;
    }
}

@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .controls {
        position: static;
        max-height: none;
    }

    header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .canvas-wrapper {
        padding: 10px;
        min-height: 300px;
    }

    .canvas-overlay {
        top: 10px;
        right: 10px;
    }

    .sim-buttons {
        grid-template-columns: 1fr;
    }

    .primary-btn {
        grid-column: 1;
    }
}

/* Scrollbar Styling */
.controls::-webkit-scrollbar {
    width: 8px;
}

.controls::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 4px;
}

.controls::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

.controls::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}