body {
    margin: 0;
    height: 100vh;
    overflow: hidden;
    background-color: #111;
    color: #eee;
    font-family: Arial, sans-serif;
    position: relative;
}

#controls {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(34, 34, 34, 0.8);
    padding: 10px;
    z-index: 10;
    border-radius: 4px;
}

#grid {
    width: 100vw;
    height: 100vh;
    background: #000;
    display: block;
}

#tools {
    position: absolute;
    top: 120px;
    left: 10px;
    background: rgba(34, 34, 34, 0.8);
    padding: 10px;
    z-index: 10;
    border-radius: 4px;
}

#tools select,
#tools input,
#tools button {
    margin-top: 4px;
    display: block;
}