/* The CognoKratos Book: restrained branding on top of mdBook's default theme.
   Light: warm paper with dark-gold accents (links #7b5706, 6.5:1 on white).
   Dark (coal/navy/ayu): near-black with CognoKratos gold #e8c76a (>10:1). */

:root {
  --ck-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --ck-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --content-max-width: 46em;
  --mono-font: var(--ck-mono);
  --code-font-size: 0.875em;
}

html { font-family: var(--ck-font); }
body { font-size: 1.7rem; line-height: 1.65; }
code, pre, .hljs { font-family: var(--ck-mono); }

/* ---------- light themes ---------- */
.light, .rust, html:not(.js) {
  --bg: #fbfaf6;
  --fg: #23231f;
  --sidebar-bg: #f2f1ea;
  --sidebar-fg: #2b2b28;
  --sidebar-non-existant: #8f8f85;
  --sidebar-active: #7b5706;
  --sidebar-spacer: #e2e0d6;
  --scrollbar: #c9c9bf;
  --icons: #66665b;
  --icons-hover: #23231f;
  --links: #7b5706;
  --inline-code-color: #4f3a08;
  --theme-popup-bg: #fbfaf6;
  --theme-popup-border: #d4d4cb;
  --theme-hover: #ecebe3;
  --quote-bg: #f3f1e8;
  --quote-border: #e3dfcc;
  --table-border-color: #dedbd0;
  --table-header-bg: #efede4;
  --table-alternate-bg: #f6f5ef;
  --searchbar-border-color: #c9c9bf;
  --searchbar-bg: #ffffff;
  --searchbar-fg: #23231f;
  --searchbar-shadow-color: #d4d4cb;
  --searchresults-header-fg: #5c5c55;
  --searchresults-border-color: #dedbd0;
  --searchresults-li-bg: #f2f1ea;
  --search-mark-bg: #f6e3a1;
  --ck-accent: #7b5706;
  --ck-accent-soft: #f6eccb;
  --ck-muted: #5c5c55;
  --ck-code-bg: #f3f2ec;
  --sidebar-header-border-color: #7b5706;
  --footnote-highlight: #7b5706;
}

/* ---------- dark themes ---------- */
.coal, .navy, .ayu {
  --bg: #121210;
  --fg: #e4e2da;
  --sidebar-bg: #0b0b09;
  --sidebar-fg: #cfcdc4;
  --sidebar-non-existant: #6f6f66;
  --sidebar-active: #e8c76a;
  --sidebar-spacer: #2a2a26;
  --scrollbar: #3a3a34;
  --icons: #a2a29b;
  --icons-hover: #f2f2ed;
  --links: #e8c76a;
  --inline-code-color: #f0d998;
  --theme-popup-bg: #1b1b18;
  --theme-popup-border: #3a3a34;
  --theme-hover: #26261f;
  --quote-bg: #1b1b18;
  --quote-border: #33302a;
  --table-border-color: #33332e;
  --table-header-bg: #1f1f1b;
  --table-alternate-bg: #171714;
  --searchbar-border-color: #3a3a34;
  --searchbar-bg: #1b1b18;
  --searchbar-fg: #e4e2da;
  --searchbar-shadow-color: #000;
  --searchresults-header-fg: #a2a29b;
  --searchresults-border-color: #33332e;
  --searchresults-li-bg: #1b1b18;
  --search-mark-bg: #6f6136;
  --ck-accent: #e8c76a;
  --ck-accent-soft: #2a2416;
  --ck-muted: #a2a29b;
  --ck-code-bg: #1a1a17;
  --sidebar-header-border-color: #e8c76a;
  --footnote-highlight: #e8c76a;
}

/* ---------- reading typography ---------- */
.content main { padding-bottom: 3rem; }
.content h1, .content h2, .content h3, .content h4 { line-height: 1.3; font-weight: 650; letter-spacing: -0.005em; }
.content h1 { font-size: 2.1em; margin-top: 0.6em; }
.content h2 { font-size: 1.5em; margin-top: 2em; padding-bottom: 0.25em; border-bottom: 1px solid var(--table-border-color); }
.content h3 { font-size: 1.22em; margin-top: 1.6em; }
.content p, .content li { hyphens: manual; }
.content a { text-underline-offset: 0.18em; }
.content a:hover { text-decoration-thickness: 2px; }
.content :is(a, button, summary):focus-visible,
#mdbook-sidebar a:focus-visible,
#mdbook-menu-bar :is(a, button, label):focus-visible {
  outline: 3px solid var(--ck-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.content code { font-size: var(--code-font-size); }
.content :not(pre) > code { background: var(--ck-code-bg); padding: 0.1em 0.3em; border-radius: 3px; }
.content pre { border-radius: 6px; line-height: 1.5; }
.content pre > code { font-size: 0.86em; padding: 1em 1.1em; }

/* Tables: scroll instead of squeezing on narrow screens. */
.content .table-wrapper, .content table { max-width: 100%; }
.content table { display: block; overflow-x: auto; border-collapse: collapse; font-size: 0.93em; }
.content table td, .content table th { padding: 0.45em 0.75em; vertical-align: top; }
.content table th { text-align: left; }

.content blockquote { border-inline-start: 4px solid var(--quote-border); padding: 0.2em 1.1em; margin-inline: 0; }

/* Mermaid diagrams: readable source fallback without JavaScript. */
.content pre.mermaid { background: transparent; text-align: center; overflow-x: auto; white-space: pre; }
.content pre.mermaid:not([data-processed]) { text-align: left; background: var(--ck-code-bg); padding: 1em; font-size: 0.85em; }
.content pre.mermaid svg { max-width: 100%; height: auto; }

/* ---------- provenance ---------- */
.content .ck-provenance {
  font-size: 0.82em;
  color: var(--ck-muted);
  margin-top: -0.4em;
  margin-bottom: 1.8em;
}
.content .ck-provenance a { color: inherit; }
.content .ck-source-footer {
  margin-top: 3.5em;
  padding-top: 1em;
  border-top: 1px solid var(--table-border-color);
  font-size: 0.82em;
  color: var(--ck-muted);
}
.content .ck-source-footer a { color: var(--links); }

/* ---------- branding ---------- */
.menu-title { font-weight: 600; letter-spacing: 0.01em; }
.menu-title::before {
  content: "";
  display: inline-block;
  width: 1.4em;
  height: 1.4em;
  margin-inline-end: 0.45em;
  vertical-align: -0.32em;
  background: url("../images/cognokratos-emblem-96.webp") center / contain no-repeat;
  border-radius: 50%;
}
.ck-colophon {
  margin: 4em auto 0;
  max-width: var(--content-max-width);
  padding: 1.2em 15px 2em;
  font-size: 0.78em;
  color: var(--ck-muted);
  border-top: 1px solid var(--table-border-color);
}
.ck-colophon a { color: inherit; }

/* Home page hero (manuscript/index.md) */
.content .ck-hero { display: flex; gap: 1.4em; align-items: center; margin: 1.4em 0 2em; }
.content .ck-hero img { width: 92px; height: 92px; flex: none; border-radius: 50%; }
.content .ck-hero p { margin: 0.2em 0; }
.content .ck-tagline { font-size: 1.15em; font-weight: 600; color: var(--ck-accent); }
@media (max-width: 560px) { .content .ck-hero { flex-direction: column; align-items: flex-start; } }

/* Part and track openers */
.content .ck-track-card {
  border: 1px solid var(--table-border-color);
  border-inline-start: 4px solid var(--ck-accent);
  border-radius: 6px;
  padding: 0.7em 1.1em;
  margin: 1.4em 0;
  background: var(--ck-accent-soft);
}
.content .ck-track-card p { margin: 0.35em 0; }

@media print {
  .ck-colophon, .ck-provenance { display: none; }
  .content .ck-source-footer { font-size: 9pt; }
}