body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #000;
    height: 100vh;
    font-family: Arial, sans-serif;
}

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

#controls {
    position: fixed;
    top: 10px;
    left: 10px;
    color: white;
    z-index: 10;
}

.zone-label {
    padding: 5px;
    margin: 2px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 3px;
}

button {
    margin-left: 5px;
    padding: 2px 5px;
}

#startButton {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 10px 20px;
    font-size: 16px;
}