/* Typography and layout for the browser edition.
   Text and headings use Inter; code uses JetBrains Mono. */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap");

:root {
    --content-max-width: 760px;
    --text-face: "Inter", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --code-face: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

    --ink: #1f2328;
    --muted: #57606a;
    --accent: #0b5cad;
    --rule: #d8dee4;
    --code-bg: #f6f8fa;
    --code-border: #e3e8ee;
    --inline-code-bg: #eff2f5;
}

:root.navy,
:root.coal,
:root.ayu {
    --ink: var(--fg);
    --muted: var(--sidebar-fg);
    --accent: var(--links);
    --rule: var(--table-border-color);
    --code-bg: var(--quote-bg);
    --code-border: var(--table-border-color);
    --inline-code-bg: var(--quote-bg);
}

html {
    font-size: 62.5%; /* 1rem = 10px, mdBook's default */
}

body {
    font-family: var(--text-face);
    font-size: 1.75rem; /* 17.5px */
    line-height: 1.7;
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.content {
    padding: 1.5em 2em 5em;
}

.content main {
    max-width: var(--content-max-width);
}

p,
li {
    text-align: left;
    hyphens: manual;
}

p {
    margin-block: 0 1.1em;
}

h1,
h2,
h3,
h4 {
    font-family: var(--text-face);
    color: var(--ink);
    font-weight: 700;
    letter-spacing: -0.015em;
    line-height: 1.25;
}

h1 {
    font-size: 3.4rem;
    margin-block: 0.4em 0.9em;
}

h2 {
    font-size: 2.5rem;
    margin-block: 2.2em 0.7em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid var(--rule);
}

h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-block: 1.8em 0.5em;
}

h4 {
    font-size: 1.75rem;
    font-weight: 600;
}

/* mdBook turns headings into links; keep them the heading colour. */
.content :is(h1, h2, h3, h4) a.header,
.content :is(h1, h2, h3, h4) a.header:visited {
    color: inherit;
}

a,
a:visited {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

strong {
    font-weight: 600;
}

em {
    font-style: italic;
}

/* Code */

code,
pre,
pre code {
    font-family: var(--code-face);
    font-variant-ligatures: none;
}

:not(pre) > code {
    font-size: 0.86em;
    background: var(--inline-code-bg);
    padding: 0.12em 0.38em;
    border-radius: 4px;
    color: var(--ink);
    white-space: nowrap;
}

pre {
    font-size: 1.4rem;
    line-height: 1.6;
    background: var(--code-bg) !important;
    border: 1px solid var(--code-border);
    border-radius: 8px;
    padding: 1.1em 1.3em;
    margin-block: 0.4em 1.4em;
}

pre > code.hljs {
    background: transparent;
    padding: 0;
}

/* Lists */

ul,
ol {
    padding-left: 1.4em;
    margin-block: 0 1.1em;
}

li {
    margin-block: 0.3em;
}

/* Tables */

table {
    border-collapse: collapse;
    margin-block: 1.4em;
    font-size: 0.95em;
}

th,
td {
    padding: 0.55em 0.9em;
    border: 1px solid var(--rule);
    vertical-align: top;
}

thead th {
    background: var(--code-bg);
    text-align: left;
    font-weight: 600;
}

/* Quotations */

blockquote {
    margin: 1.4em 0;
    padding: 0.2em 1.2em;
    border-left: 3px solid var(--accent);
    background: transparent;
    color: var(--muted);
}

/* Sidebar */

.sidebar {
    font-family: var(--text-face);
    font-size: 1.5rem;
}

.chapter li.chapter-item {
    line-height: 1.5;
}

.chapter li.part-title {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.85em;
    margin-top: 1.4em;
}

.menu-title {
    font-weight: 600;
    font-size: 1.6rem;
}

/* Link to a listing's source file on GitHub, shown above the listing. */
p.listing {
    margin-block: 0.2em 0.25em;
    font-family: var(--code-face);
    font-size: 1.3rem;
    text-align: right;
}

p.listing a::before {
    content: "source: ";
    color: var(--muted);
}