body {
    font-family: Bahnschrift, Arial;
    font-size: 16px;
    margin: 0;
}

.clickable {
    cursor: pointer;
}

a, a:visited {
    color: white;
}

h1 {
    font-size: 60px;
    padding: 30px;
}

h1, .center {
    margin:auto;
    display: block;
    text-align:center
}

.bigimg {
    width: 250px;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    background-color: #333;
    display:flex;
}

nav ul li {
    display: flex;
}

nav ul li a,
nav ul li a:visited {
    color: #fff;
    text-decoration: none;
    padding: 10px;
    font-size: 18px;
}

nav ul li a:hover:not(.active){
    background-color: #000;
}

nav ul li a.active {
    background-color: #4CAF50;
}