#header {
    background-color: #fff;
    color: #000;
    text-align: center;
    font: 20px Arial, sans-serif;
    position: absolute;
    left: 0;
    margin-top: -100px;
    top: 50%;
    width: 100%;
}
#activities {
    font-size: small;
    padding: 10px;
}

html, body {
    overflow-x: hidden;
}

a {
    color: #000;
    text-decoration: none;
}

#socials {
    position: absolute;
    right: 0;
    top: 10px;
    margin-right: 10px;
}

a:hover {
    color: #0072b1;
    transition: all 0.2s ease-in;
}