:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --accent-color: #06b6d4;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.henon-map-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 40px 20px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: 16px;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.author {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Navigation Tabs */
.viz-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.tab-btn {
    padding: 12px 24px;
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}

.tab-btn:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: transparent;
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Visualization Layout */
.viz-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 20px;
    margin-bottom: 40px;
}

@media (max-width: 1024px) {
    .viz-layout {
        grid-template-columns: 1fr;
    }
}

/* Canvas Wrapper */
.canvas-wrapper {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
    position: relative;
}

.canvas-wrapper canvas {
    width: 100%;
    height: 600px;
    display: block;
    border-radius: 8px;
    background: #000;
}

.canvas-wrapper.small canvas {
    height: 400px;
}

.canvas-info,
.zoom-info {
    position: absolute;
    top: 30px;
    left: 30px;
    background: rgba(0, 0, 0, 0.8);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-primary);
    pointer-events: none;
}

/* Controls Panel */
.controls-panel {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
    height: fit-content;
}

.controls-panel h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--accent-color);
}

.panel-desc {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.9rem;
}

/* Control Groups */
.control-group {
    margin-bottom: 24px;
}

.control-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.value-display {
    background: var(--bg-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--accent-color);
    font-weight: bold;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

select {
    width: 100%;
    padding: 10px;
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

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

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

/* Formula Display */
.formula-display {
    background: var(--bg-color);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--accent-color);
}

.formula-display h4 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.formula {
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    color: var(--accent-color);
    padding: 8px 0;
    line-height: 1.8;
}

.formula-main {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 8px;
    margin: 16px 0;
    border-left: 4px solid var(--primary-color);
}

.formula-row {
    font-family: 'Courier New', monospace;
    font-size: 1.2rem;
    color: var(--text-primary);
    padding: 8px 0;
}

.matrix {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-color);
    padding: 12px 20px;
    border-radius: 4px;
}

.matrix-row {
    padding: 4px 0;
    font-family: 'Courier New', monospace;
}

/* Info Panel */
.info-panel {
    background: rgba(37, 99, 235, 0.1);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid rgba(37, 99, 235, 0.3);
}

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

.info-panel p,
.info-panel ul {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.info-panel ul {
    padding-left: 20px;
}

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

/* Comparison Layout */
.comparison-layout {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.comparison-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
}

.comparison-section h3 {
    text-align: center;
    margin-bottom: 16px;
    color: var(--accent-color);
}

.comparison-info {
    margin-top: 16px;
    text-align: center;
}

.comparison-info p {
    margin: 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
}

/* Comparison Table */
.comparison-table {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--bg-color);
    color: var(--accent-color);
    font-weight: 600;
}

.comparison-table tr:hover {
    background: rgba(37, 99, 235, 0.1);
}

/* Formula Section */
.formula-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 32px;
    border: 1px solid var(--border-color);
}

.formula-section h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.formula-card {
    background: var(--bg-color);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary-color);
}

.formula-card h4 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--accent-color);
}

.formula-card p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.formula-card ul {
    padding-left: 24px;
    color: var(--text-secondary);
}

.formula-card li {
    margin-bottom: 8px;
}

/* Educational Content */
.educational-content {
    margin: 60px 0;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.content-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.content-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.content-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--accent-color);
}

.content-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Footer Quote */
.quote-section {
    text-align: center;
    padding: 40px 20px;
    background: rgba(30, 41, 59, 0.5);
    border-radius: 12px;
    margin-top: 60px;
    border: 1px solid var(--border-color);
}

.quote-section blockquote {
    font-size: 1.3rem;
    font-style: italic;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.quote-section cite {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .viz-tabs {
        gap: 8px;
    }

    .tab-btn {
        padding: 10px 16px;
        font-size: 0.85rem;
    }

    .canvas-wrapper canvas {
        height: 400px;
    }

    .controls-panel {
        padding: 16px;
    }

    .comparison-layout {
        grid-template-columns: 1fr;
    }

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

/* Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}