:root {
    --bg: #f7f4ed;
    --text: #444;
    --heading: #222;
    --link-hover: #3273dc;
    --border: #444;
    --nav-border: #444;
    --code-bg: #f2f2f2;
    --code-color: #222;
    --blockquote-color: #222;
    --blockquote-border: #999;
    --helptext: #777;
    --input-bg: transparent;
    --input-color: inherit;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #333;
        --text: #ddd;
        --heading: #eee;
        --link-hover: #8cc2dd;
        --border: #ddd;
        --nav-border: #c4c4c4;
        --code-bg: #777;
        --code-color: #ddd;
        --blockquote-color: #ccc;
        --helptext: #aaa;
        --input-bg: #252525;
        --input-color: #ddd;
    }
}

[data-theme="dark"] {
    --bg: #333;
    --text: #ddd;
    --heading: #eee;
    --link-hover: #8cc2dd;
    --border: #ddd;
    --nav-border: #c4c4c4;
    --code-bg: #777;
    --code-color: #ddd;
    --blockquote-color: #ccc;
    --helptext: #aaa;
    --input-bg: #252525;
    --input-color: #ddd;
}

body {
    font-family: Verdana, sans-serif;
    margin: auto;
    text-align: left;
    background-color: var(--bg);
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.5;
    color: var(--text);
}

header {
    position: sticky;
    top: 0;
    z-index: 999;
    background-color: var(--bg);
    display: grid;
    grid-template-columns: 1fr minmax(0, 720px) 1fr;
    align-items: center;
    column-gap: 20px;
    transition: box-shadow 0.2s ease;
}

header.scrolled {
    box-shadow: 0 6px 4px -4px rgba(0, 0, 0, 0.15);
}

#logo {
    grid-column: 1;
    justify-self: start;
    margin-left: 20px;
}

.logo-hex-border, .logo-hex-core {
    fill: var(--heading);
}

.logo-hex-border, .logo-hex-core {
    fill: #a02424;
}

header nav {
    grid-column: 2;
    text-align: left;
}

nav a {
    border-right: 2px solid var(--nav-border);
    padding: 0 15px;
}

nav a:last-child {
    border-right: 0;
}

#theme-toggle-button {
    grid-column: 3;
    justify-self: end;
    margin-right: 20px;
}

button, .button, #theme-toggle-button button {
    font-family: inherit;
    font-size: 14px;
    color: var(--text);
    background-color: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 14px;
    cursor: pointer;
    transition: 0.2s;
}

button:hover, .button:hover {
    color: var(--bg);
    background-color: var(--text);
    border-color: var(--text);
}

button:active, .button:active {
    opacity: 0.8;
}

button:focus-visible, .button:focus-visible {
    outline: 2px solid var(--link-hover);
    outline-offset: 2px;
}

main {
    max-width: 720px;
    margin: auto;
    padding: 20px;
}

footer {
    max-width: 720px;
    margin: auto;
    padding: 25px;
    text-align: center;
}

h1, h2, h3, h4, h5, h6, strong, b {
    color: var(--heading);
}

a {
    color: inherit;
}
a:hover {
    color: var(--link-hover);
    transition: 0.2s;
}

.title {
    text-decoration: none;
    border: 0;
}

.title span {
    font-weight: 400;
}

textarea, input {
    width: 100%;
    font-size: 16px;
    background-color: var(--input-bg);
    color: var(--input-color);
}

content {
    line-height: 1.6;
}

table {
    width: 100%;
    border-collapse: collapse;
}

tr {
    border-bottom: 2px solid var(--border);
}

img {
    max-width: 100%;
}

code {
    padding: 2px 5px;
    background-color: var(--code-bg);
}

pre code {
    color: var(--code-color);
    display: block;
    padding: 20px;
    white-space: pre-wrap;
    font-size: 14px;
    overflow-x: auto;
}

div.highlight pre {
    background-color: initial;
    color: initial;
}

div.highlight code {
    background-color: unset;
    color: unset;
}

blockquote {
    border-left: 1px solid var(--blockquote-border);
    color: var(--blockquote-color);
    padding-left: 20px;
    font-style: italic;
}

footer {
    padding: 25px;
    text-align: center;
}

.helptext {
    color: var(--helptext);
    font-size: small;
}

.errorlist {
    color: #eba613;
    font-size: small;
}

ul.blog-posts {
    list-style-type: none;
    padding: unset;
}

ul.blog-posts li {
    display: flex;
}

ul.blog-posts li span {
    flex: 0 0 130px;
}

@media (max-width: 600px) {
    header {
        position: static;
    }
    nav a {
        padding: 0 8px;
    }

    #logo {
        margin-left: 12px;
    }

    #theme-toggle-button {
        margin-right: 12px;
    }

    ul.blog-posts li {
        flex-direction: column;
    }

    ul.blog-posts li span {
        flex: none;
    }

    main, footer {
        padding: 16px;
    }
}