:root {
            --body-width: 800px;
        }
        html {
            min-height: 100vh;
        }
        body {
            font-family: monospace, sans-serif;
            max-width: var(--body-width);
            min-height: calc(100vh - 4em);
            margin: 2em auto;
            padding: 0 1em;
            line-height: 1.5;
            background: #fff;
            color: #000;

            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        h1 {
            text-align: center;
            font-size: 2.5em;
            margin-bottom: 0.5em;
        }
        h2 {
            font-size: 1.8em;
            margin-top: 2em;
            border-bottom: 1px solid #000;
            padding-bottom: 0.2em;
        }
        h3 {
            font-size: 1.4em;
            margin-top: 1.5em;
        }
        ul {
            padding-left: 2em;
        }
        li {
            margin-bottom: 0.3em;
        }
        .contact {
            text-align: center;
            font-size: 1.1em;
            margin-bottom: 2em;
            display: flex;
            flex-direction: row;
            justify-content: center;
            gap: 20px;
        }

        footer {
            display: flex;
            flex-direction: row;
            justify-content: center;
        }

        footer>p {
            margin: 0;
        }

        @media (min-width: 601px) {
            .contact>div:not(:last-child)::after {
                content: " | ";
            }
            footer {
                gap: 10px;
            }
            footer>p:not(:last-child)::after {
                content: " – ";
            }
        }

        @media (max-width: 600px) {
            .contact {
                flex-direction: column;
            }
            footer {
                flex-direction: column;
            }
            footer>p {
                margin: 5px;
            }
        }

        a {
            color: #00f;
            text-decoration: underline;
        }
        a:hover {
            color: #f00;
        }
        pre {
            background: #f8f8f8;
            padding: 1em;
            overflow-x: auto;
            border: 1px solid #ddd;
        }
        footer {
            text-align: center;
            margin-top: 4em;
            font-size: 0.9em;
            border-top: 1px solid #000;
            padding-top: 1em;
        }