:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --accent-cyan: #00f5ff;
    --accent-magenta: #ff00aa;
    --accent-yellow: #f5ff00;
    --accent-green: #00ff88;
    --text-primary: #ffffff;
    --text-secondary: #8888aa;
    --text-muted: #555566;
    --border-color: #2a2a3a;
    --neuron-inactive: #333344;
    --neuron-active: #00f5ff;
    --connection-inactive: rgba(100, 100, 150, 0.2);
    --connection-active: rgba(0, 245, 255, 0.8);
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Grid background effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 245, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 245, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

.container {
    display: grid;
    grid-template-columns: 1fr 400px;
    grid-template-rows: auto 1fr;
    gap: 20px;
    padding: 20px;
    max-width: 1800px;
    margin: 0 auto;
    min-height: 100vh;
}

/* Header */
header {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-text h1 {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.controls {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.2);
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
    border: none;
    color: var(--bg-primary);
    font-weight: 600;
}

.btn.primary:hover {
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.4);
}

.btn.danger {
    border-color: #ff4466;
}

.btn.danger:hover {
    background: rgba(255, 68, 102, 0.2);
    border-color: #ff4466;
}

/* Main simulation area */
.simulation-area {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.canvas-container {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    flex: 1;
    min-height: 500px;
}

#carCanvas {
    display: block;
    width: 100%;
    height: 100%;
}

.canvas-overlay {
    position: absolute;
    top: 15px;
    left: 15px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.stat-badge {
    background: rgba(10, 10, 15, 0.9);
    border: 1px solid var(--border-color);
    padding: 8px 15px;
    border-radius: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(10px);
}

.stat-badge .label {
    color: var(--text-secondary);
}

.stat-badge .value {
    color: var(--accent-cyan);
    font-weight: 600;
}

/* Neural network visualization */
.network-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-header .icon {
    width: 24px;
    height: 24px;
    background: var(--accent-magenta);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

#networkCanvas {
    flex: 1;
    width: 100%;
}

/* Info panels */
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.info-card h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-card h3 .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.info-card h3 .dot.cyan {
    background: var(--accent-cyan);
}

.info-card h3 .dot.magenta {
    background: var(--accent-magenta);
}

.info-card h3 .dot.yellow {
    background: var(--accent-yellow);
}

.info-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.info-card code {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--accent-cyan);
}

/* Settings panel */
.settings-section {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
}

.settings-section h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

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

.setting-row label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.setting-row input[type="range"] {
    width: 120px;
    accent-color: var(--accent-cyan);
}

.setting-row input[type="number"] {
    width: 70px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 5px 10px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    text-align: center;
}

.setting-row input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

/* Legend */
.legend {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.legend-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.legend-items {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.legend-item .swatch {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

/* Output indicators */
.output-indicators {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
}

.output-indicator {
    text-align: center;
    padding: 10px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.15s ease;
}

.output-indicator.active {
    border-color: var(--accent-cyan);
    background: rgba(0, 245, 255, 0.1);
    box-shadow: 0 0 15px rgba(0, 245, 255, 0.2);
}

.output-indicator .icon {
    font-size: 1.2rem;
    margin-bottom: 2px;
}

.output-indicator .prob {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: 2px;
}

.output-indicator .label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Loss curve */
.loss-curve-container {
    padding: 10px 15px;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.loss-curve-container canvas {
    width: 100%;
    height: 120px;
    border-radius: 6px;
}

/* Training mode toggle */
.mode-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.mode-option {
    display: flex;
    flex-direction: column;
    padding: 10px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-option:hover {
    border-color: var(--accent-cyan);
}

.mode-option input[type="radio"] {
    display: none;
}

.mode-option input[type="radio"]:checked + .mode-label {
    color: var(--accent-cyan);
}

.mode-option:has(input:checked) {
    border-color: var(--accent-cyan);
    background: rgba(0, 245, 255, 0.08);
    box-shadow: 0 0 12px rgba(0, 245, 255, 0.15);
}

.mode-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.mode-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
}

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

    .network-panel {
        min-height: 400px;
    }

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

/* Animations */
@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

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

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 5px var(--accent-cyan);
    }

    50% {
        box-shadow: 0 0 20px var(--accent-cyan), 0 0 30px var(--accent-cyan);
    }
}

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

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

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

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

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