*, body {
    margin: 0;
    padding: 0;
}

body {
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: #f0f0f0;
}

canvas {
    background: white;
    border: 1px solid black;
    touch-action: none;
}

#connectHID {
    display: none;
}

#showHID {
    display: none;
}

#erase {
    position: absolute;
    top: 5px;
    left: 5px;
}

input {
    position: absolute;
    top: 30px;
    left: 5px;
}