:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --accent-color: #58a6ff;
    --panel-bg: rgba(22, 27, 34, 0.75);
    --panel-border: #30363d;
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow: hidden;
    /* Prevent scrollbars */
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

.controls-panel {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 300px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--panel-bg);
    backdrop-filter: blur(15px);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--panel-border);
    z-index: 10;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    font-size: 0.85rem;
}

.controls-panel::-webkit-scrollbar {
    width: 6px;
}

.controls-panel::-webkit-scrollbar-thumb {
    background: var(--panel-border);
    border-radius: 3px;
}

.controls-panel h2 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-weight: 500;
    color: #e0e0e0;
}

.control-group input[type="range"] {
    width: 100%;
    accent-color: var(--accent-color);
    cursor: pointer;
    height: 4px;
    background: var(--panel-border);
    border-radius: 2px;
    appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
}

.value-display {
    color: var(--accent-color);
    font-family: monospace;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
    cursor: pointer;
}

.checkbox-group input {
    accent-color: var(--accent-color);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.button-group {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

button {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    border: 1px solid var(--panel-border);
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.2s ease;
    flex: 1;
}

button:hover {
    background: var(--accent-color);
    color: #121212;
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

#backBtn:hover {
    background: #f44336;
    border-color: #f44336;
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.3);
}