input[type="button"]{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 12px;
    height: 25px;
}
.shape {
    background-color: #fff;
    display: inline-block;
    font-family:Verdana, Geneva, Tahoma, sans-serif;
    font-size: 20px;
    width: 4%;
    text-align: center;
    padding: 0;
    margin-left: 2px;
    border-radius: 15px;
    cursor: pointer;
    box-shadow: 0 9px 4px #999;
    outline: none;
}    
.shape:hover {background-color: #3e8e41}
.shape:active {
    background-color: #3e8e41;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
    }

#molecules{
    position: absolute;
    left: 2%;
    bottom: 2%;
    width: 100%;
}
html, body {
    padding: 0;
    margin: 0;
    overflow: hidden;
}
#structure{
    padding: 0;
    margin: 0;
    position: absolute;
    top: 5%;
    left: 25%;
    width: 50%;
    font-family:'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-size: 80px;
    text-align: center;
    text-emphasis: bold;
}