:root {
    --bg-color: #ffffff;
    --text-color: #000000;
    --panel-bg: rgba(255, 255, 255, 0.95);
    --accent-color: #000000;
    --border-color: #e0e0e0;
    --spacing: 12px;
}

body {
    margin: 0;
    overflow: hidden;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 12px;
    /* Condensed font */
}

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

.canvas-container {
    flex-grow: 1;
    position: relative;
    background: #fcfcfc;
}

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

.info-overlay {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border: 1px solid var(--border-color);
    pointer-events: none;
    font-family: monospace;
}

/* Condensed Control Panel */
.control-panel {
    width: 300px;
    /* Slightly wider for better slider precision */
    background: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.05);
}

.panel-header {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h1 {
    font-size: 16px;
    margin: 0;
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* Collapsible Sections */
.control-section {
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #fafafa;
    user-select: none;
    transition: background 0.2s;
}

.section-header:hover {
    background: #f0f0f0;
}

.section-header h2 {
    font-size: 13px;
    margin: 0;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #444;
}

.section-header::after {
    content: '▼';
    font-size: 10px;
    color: #888;
    transition: transform 0.2s;
}

.control-section.collapsed .section-header::after {
    transform: rotate(-90deg);
}

.section-content {
    padding: 15px;
    display: block;
}

.control-section.collapsed .section-content {
    display: none;
}

/* Controls */
.control-group {
    margin-bottom: 10px;
}

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

.control-group label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-weight: 500;
    color: #555;
    font-size: 11px;
}

input[type="range"] {
    width: 100%;
    height: 4px;
    background: #ddd;
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    margin: 6px 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: 2px solid #fff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

input[type="checkbox"] {
    margin-right: 8px;
}

input[type="color"] {
    border: none;
    width: 30px;
    height: 20px;
    cursor: pointer;
    padding: 0;
    background: none;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 8px;
    margin-top: 5px;
}

.btn {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn:hover {
    background: #f5f5f5;
    border-color: #ccc;
}

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

.btn-primary:hover {
    background: #333;
}

.btn-small {
    padding: 4px 8px;
    font-size: 11px;
}

.audio-controls {
    display: flex;
    gap: 5px;
    margin-top: 5px;
}