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

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --border-color: #374151;
    --glow-primary: rgba(59, 130, 246, 0.5);
    --glow-success: rgba(16, 185, 129, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding: 30px 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.formula-display {
    padding: 15px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    display: inline-block;
    border: 1px solid var(--border-color);
}

.formula {
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    color: var(--accent-primary);
    text-shadow: 0 0 10px var(--glow-primary);
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Canvas Container */
.canvas-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.canvas-wrapper {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.canvas-wrapper h2 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--accent-primary);
}

canvas {
    width: 100%;
    height: auto;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.canvas-label {
    text-align: center;
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Graph Container */
.graph-container {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.graph-container h2 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--accent-primary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: 10px;
    padding: 20px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--accent-primary);
    text-shadow: 0 0 15px var(--glow-primary);
    margin-bottom: 5px;
}

.stat-value.constrained {
    color: var(--accent-success);
    text-shadow: 0 0 15px var(--glow-success);
}

.stat-value.reduction {
    color: var(--accent-warning);
}

.stat-value.gain {
    color: var(--accent-secondary);
}

.stat-unit {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Gauge */
.gauge-container {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
}

.gauge-container h3 {
    text-align: center;
    margin-bottom: 15px;
    color: var(--accent-primary);
}

.gauge {
    padding: 10px;
}

.gauge-bar {
    height: 30px;
    background: var(--bg-primary);
    border-radius: 15px;
    overflow: hidden;
    position: relative;
    border: 2px solid var(--border-color);
}

.gauge-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-success) 0%, var(--accent-warning) 50%, var(--accent-danger) 100%);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 15px;
    box-shadow: 0 0 20px var(--glow-primary);
}

.gauge-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Controls */
.controls-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
}

.controls-section h2 {
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.control-group {
    margin-bottom: 20px;
}

.control-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.control-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--glow-primary);
}

.control-group input[type="range"] {
    width: 100%;
    height: 8px;
    background: var(--bg-primary);
    border-radius: 4px;
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--glow-primary);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px var(--glow-primary);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 5px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.button-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    flex: 1;
    min-width: 120px;
}

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

.btn-primary:hover {
    background: #2563eb;
    box-shadow: 0 0 20px var(--glow-primary);
    transform: translateY(-2px);
}

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

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

.toggle-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

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

.toggle input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.toggle span {
    color: var(--text-secondary);
}

/* Info Section */
.info-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
}

.info-section h3 {
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.info-card {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 15px;
    border: 1px solid var(--border-color);
}

.info-card h4 {
    color: var(--accent-secondary);
    margin-bottom: 10px;
}

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

/* Bit View */
.bit-view {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
}

.bit-view h3 {
    margin-bottom: 15px;
    color: var(--accent-primary);
}

.bit-container {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    margin-bottom: 15px;
    max-height: 200px;
    overflow-y: auto;
    padding: 15px;
    background: var(--bg-primary);
    border-radius: 8px;
}

.bit-box {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    transition: all 0.2s;
}

.bit-box.high {
    background: var(--accent-danger);
    box-shadow: 0 0 5px var(--accent-danger);
}

.bit-box.medium {
    background: var(--accent-warning);
    box-shadow: 0 0 5px var(--accent-warning);
}

.bit-box.low {
    background: var(--accent-success);
    box-shadow: 0 0 5px var(--accent-success);
}

.bit-legend {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Compression View */
.compression-view {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
}

.compression-view h3 {
    margin-bottom: 15px;
    color: var(--accent-primary);
}

.compression-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.comp-stat {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.comp-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.comp-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-primary);
    margin-bottom: 3px;
}

.comp-unit {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.tree-container {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 15px;
    min-height: 150px;
    max-height: 300px;
    overflow-y: auto;
}

.tree-node {
    padding: 8px 12px;
    margin: 5px 0;
    background: var(--bg-tertiary);
    border-radius: 4px;
    border-left: 3px solid var(--accent-primary);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

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

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

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }

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

    .button-group {
        flex-direction: column;
    }

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

/* Animations */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--glow-primary);
    }
    50% {
        box-shadow: 0 0 20px var(--glow-primary);
    }
}

.stat-value {
    animation: pulse 2s ease-in-out infinite;
}

.gauge-fill {
    animation: glow 2s ease-in-out infinite;
}

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

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

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

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