:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --danger: #ef4444;
    --success: #22c55e;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    font-weight: 300;
}

main {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    align-items: start;
}

.controls-panel {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--accent-primary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.25rem;
}

.slider-item {
    margin-bottom: 1rem;
}

.slider-item label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.slider-item input[type="range"] {
    width: 100%;
    accent-color: var(--accent-primary);
}

.slider-item .value {
    display: block;
    text-align: right;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-secondary);
}

.actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.button-row {
    display: flex;
    gap: 0.75rem;
}

button {
    flex: 1;
    padding: 0.75rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-main);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
}

button.primary {
    background: var(--accent-primary);
    color: var(--bg-dark);
    border: none;
}

button:hover:not(:disabled) {
    filter: brightness(1.2);
    transform: translateY(-1px);
}

button:disabled {
    opacity: 0.2;
    cursor: not-allowed;
}

.slider-item.disabled {
    opacity: 0.3;
    pointer-events: auto;
    /* Allow hover for tooltip */
    cursor: not-allowed;
}

.slider-item.disabled input {
    cursor: not-allowed;
}

.metric-card .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 0.25rem;
    cursor: help;
}

.visualization-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.chart-container {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    width: 100%;
    max-width: 650px;
    height: auto;
    aspect-ratio: 1 / 1;
    margin: 0 auto;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

canvas {
    width: 100% !important;
    height: 100% !important;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
}

.metric-card {
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border);
    text-align: center;
}

.metric-card .label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.metric-card .value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-primary);
    font-family: 'Outfit', sans-serif;
}

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