body,
html {
    height: 100%;
    margin: 0;
    font-family: 'Roboto', sans-serif;
}

body {
    /* Background image */
    background-image: url("images/wallpaper-darkmode-01.png");

    /* Center and scale the image nicely */
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.link-about {
    float: right;
    text-align: right;
    margin-top: 10px;
    margin-right: 20px;
    font-size: 20px;
    font-weight: bold;
    color: #41cb69;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
}

.link-about:hover {
    background-color: #3e8e41;
}