:root {
    color-scheme: light dark;
    --bg: #fefefe;
    --fg: #000;
    --bar-bg: var(--fg);
    --bar-fg: var(--bg);
    --hl: #555;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fg: #fefefe;
        --bg: #000;
        --bar-bg: #555;
        --bar-fg: #fefefe;
        --hl: #bbb;
    }
}

* {
    box-sizing: border-box;
}

main a {
    color: var(--fg);
}

main a:visited {
    color: var(--hl);
}


html {
    font-family: sans-serif;
    line-height: 1.5;
}

input {
    border: 1px solid silver;
    border-radius: 5px;
    padding: 5px;
}

body {
    background-color: var(--bg);
    hyphens: auto;
    overflow-wrap: break-word;
    margin: 0;
    text-rendering: optimizeLegibility;
    font-kerning: normal;
}

body > header {
    background: var(--bar-bg);
}

body > header nav {
    max-width: 75ch;
    margin: 0 auto;
    padding: 2px 8px;
}

body > header nav * {
    color: var(--bar-fg);
}

main {
    max-width: 75ch;
    margin: 0 auto;
    padding: 0 8px 20ch;
    color: var(--fg);
}

img {
    max-width: 100%;
}


pre {
    margin: 1em 0;
    overflow: auto;
}

pre code {
    padding: 0;
    overflow: visible;
    overflow-wrap: normal;
}

button, .button, input[type=submit] {
    display: inline-block;
    background-color: var(--fg);
    color: var(--bg);
    font-size: 1em;
    text-align: center;
    padding: 8px;
    margin-right: 5px;
    border-radius: 5px;
    text-decoration: none;
    border: none;
    line-height: normal;
    cursor: pointer;
}

button:last-child, .button:last-child {
    margin-right: 0;
}

.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

p.date {
    font-size: 0.9em;
    color: gray;
}

a.homepage-link {
    font-style: italic;
}

@media print {
    body {
        background-color: transparent;
        --bg: transparent;
        --fg: #000;
        font-size: 12pt;
    }
    body > header {
        background-color: transparent;
    }
    body > header nav * {
        color: var(--fg);
    }
    p, h2, h3 {
        orphans: 3;
        widows: 3;
    }
    h2, h3, h4 {
        page-break-after: avoid;
    }
}