* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
#canvas1 {
    background: black;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
#controls {
    position: absolute;
    padding: 10px;
    border: 2px solid white;
    left: 20px;
    top: 20px;
    width: 250px;
    background: rgba(255,255,255,0.15);
}
button{
    padding: 10px 40px;
    width: 225px;
    font-size: 20px;
}
label, input{
    color: white;
    font-size: 18px;
}