* {
    box-sizing: border-box;
}

body {
    width: 75%;
    margin: auto;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.5;
}

header {
    text-align: center;
    padding: 20px;
}

header img {
    max-width: 100%;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 5px solid black;
    border-top-left-radius: 25px;
    border-top-right-radius: 25px;
}

nav li {
    float: left;
    border-right: 3px solid black;
}

nav li a {
    display: block;
    padding: 15px 20px;
    color: black;
    text-align: center;
    text-decoration: none;
}

nav li a:hover {
    background-color: darkgrey;
}

.active {
    background-color: dimgrey;
    a {
        color: white;
    }
}

main {
    padding: 30px;
    background-color: black;
    color: white;
    border-bottom-left-radius: 25px;
    border-bottom-right-radius: 25px;
    text-align: center;
}

main a {
    color: white;
}

footer {
    text-align: center;
    font-size: 0.8em;
    padding: 20px;
}

footer a {
    color: black;
}

#instagram {
    margin: 16px;
}