body {
    margin: 20px auto;
    padding: 10px 20px;
    max-width: 80ch;

    background: #eee;
    color: #333;

    font-family: sans-serif;
}

h1, h2, h3 {
    line-height: 1.2;
}

p {
    line-height: 1.6;
    text-align: justify;
}

code {
    font-size: 1.2em;
}

table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid black;
}

td, th {
    border: 1px solid black;
    padding: 4px;
}