html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    background: #121212;
    color: #e0e0e0;
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
}

a {
    color: #90caf9;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

nav {
    margin: 1rem auto;
    padding: 0 1rem;
    max-width: 800px;
    width: 100%;
}


main {
    flex: 1;
    max-width: 800px;
    margin: auto;
    width: 100%;
    padding: 1rem;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1rem 0;
}

footer {
    text-align: center;
    padding: 1rem 0;
}