body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #000;
    font-family: sans-serif;
}

#glcanvas {
    width: 100%;
    height: 100%;
    display: block;
}

#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 24px;
    pointer-events: none;
    transition: opacity 0.5s;
}

.hidden {
    opacity: 0;
}