/* header */
#header {
    position: absolute;
    left: 50%;
    top: 20px;
    transform: translateX(-50%);
    text-align: center;
}
#header h1 {
    margin-bottom: 0.3em;
}
#header ul {
    margin-top: 0.6em;
}
#header li {
    display: inline-block;
}
#header li a {
    color: #fff;
    border: 1px solid #fff;
    width: 30px;
    height: 30px;
    line-height: 30px;
    display: inline-block;
    border-radius: 30%;
}
#header li.active a {
    background: #fff;
    color: #000;
}
/* footer */
#footer {
    position: absolute;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
}
#footer a {
    color: #fff;
    font-size: 14px;
}
#footer a:hover {
    text-decoration: underline;
}