style.css

body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}
#canvas {
    width: 100vw;
    height: 100vh;
    background: #000;
    margin: 0;
    padding: 0;
}
.no-mouse {
    cursor: none;
}
#control {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 10;
    opacity: 0;
    background: transparent;
    color: white;
    font-size: x-large;
    width: 30px;
    height: 30px;
    font-weight: 900;
    cursor: pointer;
    border: 1px solid slategrey;
}
#control:hover {
    opacity: 1;
}
#panel {
    position: fixed;
    top:0;
    right:0;
    width: 50vw;
    padding: 25px;
    background-color: #000;
    color: #fff;
    border-radius: 5px;
}
.hide {
    display: none;
}
input {
    padding: 2px;
    border: 1px solid rgb(55, 55, 55);
    border-radius: 5px;
    margin: 5px;
    background: #000;
    color: #fff;
}