body {
    font-family: sans-serif;
    margin: 0;
    overflow: hidden;
}

header {
    position: fixed;
    top: 1em;
    left: 1em;
    z-index: 1;
}

a {
    color: white;
    text-decoration: none;
}

#container {
    width: 100vw;
    height: 100vh;
}

#controls {
    position: absolute;
    top: 20px;
    right: 20px;
    background-color: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 20px;
    border-radius: 10px;
}

#controls h2 {
    margin-top: 0;
}

#controls label {
    display: block;
    margin-bottom: 10px;
}

#controls input {
    width: 100%;
}