:root {
    --bg-dark: #0f172a;
    --bg-panel: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;

    --cyan: #06b6d4;
    --cyan-glow: rgba(6, 182, 212, 0.5);

    --green: #10b981;
    --green-glow: rgba(16, 185, 129, 0.5);

    --magenta: #d946ef;
    --magenta-glow: rgba(217, 70, 239, 0.5);

    --amber: #f59e0b;
    --amber-glow: rgba(245, 158, 11, 0.5);

    --radius: 12px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(circle at 100% 0%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 0% 100%, rgba(217, 70, 239, 0.05) 0%, transparent 50%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    color: var(--cyan);
}

.brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.brand span {
    color: var(--text-muted);
    font-weight: 400;
}

.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.control-panel {
    width: 300px;
    background: var(--bg-panel);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    overflow-y: auto;
    backdrop-filter: blur(16px);
}

.panel-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.panel-section h3 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    font-weight: 600;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--cyan);
    color: #000;
    box-shadow: 0 0 15px var(--cyan-glow);
}

.btn-primary:hover {
    background: #0891b2;
    box-shadow: 0 0 20px var(--cyan-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.5);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.3);
}

.full-width {
    width: 100%;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-size: 0.875rem;
    color: var(--text-main);
}

.control-group select,
.control-group input[type="range"] {
    width: 100%;
}

select {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.625rem;
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    outline: none;
    cursor: pointer;
}

select:focus {
    border-color: var(--cyan);
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--cyan);
    cursor: pointer;
    box-shadow: 0 0 10px var(--cyan-glow);
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    align-items: center;
    justify-content: center;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.stat-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cyan);
}

.visualizer-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.5rem;
    overflow-y: auto;
}

.canvas-container {
    flex: 1;
    background: #000;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    position: relative;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
    min-height: 250px;
}

.canvas-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 0.5rem 1rem;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent);
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    color: rgba(255, 255, 255, 0.5);
    z-index: 2;
    pointer-events: none;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .control-panel {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        max-height: 40vh;
    }
}