styles.css

.controls {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 200px;
    height: 180px;
    background-color: #696f75;
    border-radius: 6px;
    z-index: 2;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
    padding: 8px;
}

.control{
    width: 100%;
    opacity: 1;
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    height: 24px;
    line-height: 24px;
}
.control input{
    width: 80px;
    height: 24px;
    border-radius: 4px;
}

.control button{
    margin: 8px;
    height: 28px;
}

.pi-label{
    position: fixed;
    font-size: 18vw;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    color: black;
    opacity: 0.2;
    user-select: none;
    margin: auto;
    text-shadow: -5px -5px 0 #fff, 5px -5px 0 #fff, -5px 5px 0 #fff, 5px 5px 0 #fff;
}