body {
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.controls {
    margin-bottom: 20px;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 4px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.canvas-container {
    position: relative;
    width: 100%;
    height: 600px; /* Fixed height for viewport */
    background: #333;
    overflow: hidden;
    user-select: none;
}

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

.hidden {
    display: none;
}

#loading {
    position: absolute;
    color: white;
    font-size: 1.2em;
    background: rgba(0,0,0,0.7);
    padding: 10px 20px;
    border-radius: 5px;
}