body {
    margin: 0;
}

canvas {
    display: block;
}

.control-panel {
    position: absolute;
    font-family: monospace;
    top: 10px;
    left: 10px;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

.hidden-panel {
    display: none;
    position: absolute;
    font-family: monospace;
    top: 5px;
    left: 5px;
    background-color: rgba(255, 255, 255, 0.8);
    padding: 5px;
    border-radius: 5px;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}

.red {
    color: red;
}

.green {
    color: green;
}

.blue {
    color: blue;
}