body{
    padding: 0;
    margin: 0;
    overflow:hidden;
}
canvas{
    background: black;
}

.center {
    position: absolute;
    color:white;
    font-family: Arial;
    opacity: 0.7;
    text-align: center;
    line-height: 80px;
    width: 400px;
    height: 80px;
    top: 50%;
    left: 50%;
    margin-top: -40px;
    margin-left: -200px;
    user-select: none;
    
    animation-name: enter;
    animation-duration: 2s;
    transition: opacity 2s ease-in-out;
}

.hidden{
    visibility: hidden;
    opacity: 0;
    transition: visibility 0s 2s, opacity 2s linear;
}

@keyframes enter {
    from {top: 30%; opacity: 0;}
    to {opacity: 0.7;}
  }