body, h1, h2, h3, p {
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background-color: black;
    color: green;
}

.container {
    width: 80%;
    margin: 0 auto;
}

header {
    background-color: #4CAF50;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header h1 {
    font-size: 36px;
}

main {
    padding: 20px;
}

main h2 {
    color: #4CAF50;
}

main h3 {
    color: #4CAF50;
}

main h4 {
    color: #4CAF50;
}

#turtles {
    display: block;
    margin: 0 auto;
}

#collect,
#fight,
#tour {
    display: block;
    margin: 20px auto;
}

footer {
    background-color: #333;
    color: #fff;
    padding: 10px 20px;
    text-align: center;
}

footer p {
    margin-bottom: 10px;
}

ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li{
    float: left;
}

li a{
    display: block;
    color: green;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover{
    background-color: #111;
]}