.central-box {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.central-box img {
    max-width: 80%;
    max-height: 80%;
    object-fit: contain;
}

.central-welcome-box {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.central-welcome-box h1 {
    background: rgba(0,0,0,.25);
    padding: 1rem;
    font-style: italic;
    font-family: sans-serif;
    color: white;
    margin: 0;
}

canvas#canvas {
    display: block;
}

body {
    margin: 0;
    padding: 0;
}