h1 {
    border-bottom: 2px;
    border-bottom-color: #8888ff88;
    border-bottom-style: groove;
    text-align: center;
}

h2 {
    text-decoration-line: underline;
}

body {
    max-width: 25cm;
    margin: 1cm auto 5cm auto;
    padding: 5mm;
    border: 1px;
}

pre code {
	border-style: solid;
	border-radius: 5px;
	border-width: 1px;
}

@media (prefers-color-scheme: light) {
    body {
        background-color: whitesmoke;
        border-style: solid;
        border-color: #1010100f;
    }

    a {
        color: #202040;
    }

    * {
        color: #202020;
    }

    h1, h2 {
        color: #404040;
    }

    h3 {
        color: #303030;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: #202020;
        border-style: solid;
        border-color: #efefef0f;
    }

    a {
        color: #d0d0ff;
    }

    * {
        color: #d0d0c9;
    }

    h1, h2 {
        color: white;
    }

    h3 {
        color: #e0e0d0;
    }
}