body {
    margin-left: 0px;
    background: black;
}

canvas {
    margin-bottom: 16px;
}

.panel {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    display: flex;
    flex-direction: column;
}
.panel > label {
    color: white;
    font-size: 32px;
    margin-bottom: 16px;
}

.panel > button {
    width: 100%;
    margin-bottom: 8px;
}

.panel > a {
    margin-bottom: 8px;
}