body {
    font-family: "Roboto", sans-serif;
    background-color: #000;
    color: rgb(245 245 247);
    font-size: 20px;
    margin: 0;
}

nav > a {
    color: rgb(245 245 247);
    text-decoration: none;
}
header {
    padding: 10px;
    width: calc(100% - 20px);
}
nav {
    width: 100%;
    text-align: center;
}