/* Written with love by Enguerrand Quilliard (Tricotou) */
/* See more at tricotools.com */
html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background: #222;
}

#renderCanvas {
    width: 100vw;
    height: 100vh;
    display: block;
    touch-action: none;
}

#button-back {
    position: absolute;
    top: 16px;
    left: 16px;
    color: #fff;
    text-decoration: none;
    font-size: 1.2em;
    font-family: Arial, sans-serif;
    text-shadow: 2px 2px 6px #000, 0 0 2px #000;
    background: rgba(0, 0, 0, 0.3);
    padding: 6px 14px;
    border-radius: 6px;
    z-index: 1000;
    cursor: pointer;
}

.instructions {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.8);
    color: #111;
    padding: 12px 18px;
    border-radius: 8px;
    font-family: sans-serif;
    font-size: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    z-index: 10;
}