body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: #121212;
    color: #ffffff;
}

main,
header {
    max-width: 65ch;
    margin: 0 auto;
    padding: 1em;
}

header h1 {
    text-align: center;
}

a {
    color: #bb86fc;
}

a:visited {
    color: #bb86fc;
}

a:active {
    color: #03dac6;
}

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