body {
    background: black;
    font-family: Helvetica, Arial;
    font-size: 16px;
}

#main{
    width: 620px;
    margin: 30px auto;
}

#title-back {
    background: white;

    height: 80px;
    /*width: 360px;*/
}

#title {
    color: black;
    font-weight: 900;
    font-size: 62px;
    margin-top: -52px;
    margin-left: 30px;
}

a {
    text-decoration: none;
}

#title2 {
    color: black;
    font-weight: 900;
    font-size: 62px;
    margin-top: -42px;
    margin-left: 31px;
}

#keyboard {
    position: relative;
}
.white-key {
    background: white;
    width: 20px;
    height: 80px;
    float: left;
    border: 1px solid black;
    border-bottom: 3px solid gray;
    position:absolute;
}

.black-key {
    background: black;
    width: 12px;
    height: 50px;
    float: left;
    position:absolute;
    z-index: 1;
}

#warning {
    margin-top: 100px;
    padding: 3px 8px;
    border-radius:5px;
    background: #444;
    color: white;
    display: none;
}

#warning #hider {
    float: right;
    background: #222;
    border-radius: 3px;
    padding: 2px 5px;
    margin-top: 1px;
    color: white;
    cursor: pointer;
    font-size: 12px;
}

#howto {
    top: 230px;
    font-size: 14px;
    position:absolute;
    color:white;
    background: #333;
    padding: 5px;
    padding-left:10px;
}