:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.3);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --danger: #ef4444;
    --success: #22c55e;
}

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

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

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--glass-border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    z-index: 10;
    box-shadow: 10px 0 30px rgba(0,0,0,0.3);
}

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

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(to right, var(--accent-color), #818cf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group h3 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
}

.slider-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.slider-item label {
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
}

.slider-item label span {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-color);
}

input[type="range"] {
    appearance: none;
    width: 100%;
    height: 6px;
    background: #334155;
    border-radius: 3px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-glow);
    transition: transform 0.2s;
}

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

.actions {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn {
    padding: 0.75rem;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn.primary {
    background: var(--accent-color);
    color: #000;
}

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

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

.btn.secondary:hover {
    background: var(--glass-bg);
}

/* Main Viewport */
.viewport {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.canvas-container {
    flex: 1;
    background: var(--glass-bg);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 0 50px rgba(0,0,0,0.5);
}

#simulationCanvas {
    width: 100%;
    height: 100%;
}

.overlay {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    display: flex;
    gap: 1rem;
}

.stat-card {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    min-width: 120px;
}

.stat-card label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.stat-card span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    font-weight: 600;
}

.analytics-panel {
    height: 300px;
    background: var(--sidebar-bg);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    padding: 1.5rem;
}

.chart-container {
    width: 100%;
    height: 100%;
}