body {
    font-family: Arial, sans-serif;
    background: #000;
    color: #fff;
    text-align: center;
}

header {
    background: #222;
    padding: 20px;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

main {
    margin: 20px;
}

#store {
    background: #444;
    padding: 20px;
    border-radius: 5px;
    margin-top: 20px;
}

#characters div {
    margin: 5px;
    padding: 10px;
    background: #555;
    border-radius: 3px;
}

#characters img {
    width: 50px;
    height: 50px;
    margin-right: 10px;
    vertical-align: middle;
}