body {
    text-align: center;
    margin: 0;
    font-family: sans-serif;
    cursor: default;
    overflow-x: hidden;
    background-image: url(images/sunset-7133867_1280.jpg);
    background-size: 100vw 100vh;
    color: white;
    text-shadow: 5px 5px 5px gray;
    background-attachment: fixed;
}


::selection {
    background-color: lightblue;
    color: white;
}

nav {
    background-color: black;
    color: white;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

nav a {
    text-decoration: none;
    color: white;
    padding: 15px;
    display: block;
    width: 100%;
    background-color: black;
}

nav a:hover {
    background-color: gray;
}

.download-green {
    background-color: green;
}

.download-green:hover {
    background-color: darkgreen;
}


fieldset {
    border: 5px outset gray;
}