body {
    background-color: black;
}

div {
    background-color: slategray;
    width: 80%;
    margin-left: 10%;
    margin-right: 10%;
    margin-bottom: 15px;
    padding: 15px;
    border: 2px solid whitesmoke;
    border-radius: 5px;
}

.para {
    color: black;
}


/* -----Links-----*/

a {
    color:bisque;
    font-weight: 700;
    text-decoration: none;
}

a:hover {
    color:whitesmoke;
    text-decoration: line-through;
}

a:visited {
    color: black;
}

/*-----Navigation-----*/

header {
    width: 80%;
    margin-left: 10%;
    margin-right: 10%;
    margin-bottom: 15px;
    padding: 10px;
    border: medium solid whitesmoke;
    border-radius: 5px;
}

header ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color:darkslategrey;
}

header li {
    float: left;
}

header li a {
    display: block;
    color: darkgoldenrod;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
}

header li a:hover {
    background-color:darkslateblue;
    color: black;
    text-decoration: line-through;
}

header li a:visited {
    color: whitesmoke;
}

header li a:visited:hover {
    color: black;
}