:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a3e;
    --bg-tertiary: #252560;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --accent-tertiary: #ee9ca7;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6e6e85;
}

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

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
    line-height: 1.5;
}

.container {
    /* max-width: 1400px; */
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

.main-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.canvas-wrapper {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
}

canvas {
    width: 100%;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--bg-tertiary);
    display: block;
    background: linear-gradient(180deg, #e3f2fd 0%, #bbdefb 100%);
}

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

.control-panel {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.control-panel h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-panel h2::before {
    content: "";
    width: 3px;
    height: 1.25em;
    background: linear-gradient(
        180deg,
        var(--accent-primary),
        var(--accent-secondary)
    );
    border-radius: 2px;
}

.button-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

button {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-family: var(--accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    min-width: 80px;
    position: relative;
    overflow: hidden;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

button:active {
    transform: translateY(0);
}

button.primary {
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    );
}

button.primary:hover {
    opacity: 0.9;
}

button.toggle {
    background: var(--bg-tertiary);
}

button.toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

button.toggle.active {
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    ) !important;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2),
        0 4px 12px rgba(102, 126, 234, 0.6);
    transform: translateY(-2px);
    color: white;
}

button.toggle:not(.active)::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    animation: pulse 2s ease-in-out infinite;
}

button.toggle.active {
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    ) !important;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.6);
}

@keyframes pulse {
    0%,
    100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.6;
    }
}

@media (prefers-reduced-motion: reduce) {
    button.toggle::after {
        animation: none;
        opacity: 0.2;
    }
}

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

.slider-group:last-child {
    margin-bottom: 0;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.slider-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.slider-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--accent-tertiary);
    font-family: "Inter", monospace;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    );
    cursor: pointer;
    transition: transform 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(
        135deg,
        var(--accent-primary),
        var(--accent-secondary)
    );
    cursor: pointer;
    border: none;
    transition: transform 0.2s ease;
}

input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.15);
}

#graph {
    width: 100%;
    height: 300px;
}