/* Minimal Editorial — Cobalt
   Newsreader + IBM Plex Mono · #FFFFFF / #141414 / #2547C8 */

:root {
  --bg: #FFFFFF;
  --ink: #141414;
  --body: #1A1A1A;
  --muted: #555555;
  --faint: #8A8A8A;
  --meta: #9A9A9A;
  --rule: #E8E8E8;
  --accent: #2547C8;
  --measure: 648px;
  --serif: 'Newsreader', Georgia, serif;
  --mono: 'IBM Plex Mono', ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; }
a:hover { opacity: .82; }

img { max-width: 100%; height: auto; }

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 64px 24px 88px;
}

/* ---- Header ---- */
.site-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.site-title {
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  color: var(--ink);
  text-decoration: none;
}
.site-nav {
  display: flex;
  gap: 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
}
.site-nav a { text-decoration: none; color: var(--faint); }
.site-nav a.is-active { color: var(--ink); }

/* ---- Meta line (mono, uppercase) ---- */
.meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--meta);
  text-transform: uppercase;
}
.meta .tag { color: var(--accent); }

/* ---- Homepage intro ---- */
.intro {
  margin-top: 72px;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.68;
  color: var(--ink);
}
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}
.links a { color: var(--accent); text-decoration: none; }
.links .now { color: var(--faint); text-transform: uppercase; }

.rule-strong { margin-top: 64px; border-top: 1px solid var(--ink); }

/* ---- Post list ---- */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-card {
  padding: 44px 0;
  border-bottom: 1px solid var(--rule);
}
.post-card__title {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 28px;
  line-height: 1.25;
  color: var(--ink);
}
.post-card__title a { text-decoration: none; }
.post-card__excerpt {
  margin: 10px 0 0;
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---- Archive / tag header ---- */
.archive-head { margin-top: 80px; }
.archive-title {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 38px;
  line-height: 1.15;
  color: var(--ink);
}
.archive-desc {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
  color: var(--muted);
}
.archive-rule { margin-top: 48px; border-top: 1px solid var(--ink); }

/* ---- Single post / page ---- */
.post-header { margin-top: 80px; }
.post-title {
  margin: 16px 0 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 42px;
  line-height: 1.15;
  color: var(--ink);
  text-wrap: pretty;
}
.page-title {
  margin: 80px 0 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 38px;
  line-height: 1.15;
  color: var(--ink);
}

.content {
  margin-top: 8px;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.75;
  color: var(--body);
}
.content > p:first-child { margin-top: 44px; }
.content p { margin: 26px 0 0; }
.content h2 {
  margin: 56px 0 0;
  font-weight: 600;
  font-size: 25px;
  line-height: 1.3;
  color: var(--ink);
}
.content h3 {
  margin: 40px 0 0;
  font-weight: 600;
  font-size: 20px;
  color: var(--ink);
}
.content a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.content em { font-style: italic; }
.content img { margin: 34px 0; border-radius: 2px; }

.content blockquote {
  margin: 48px 0 0;
  padding: 0 0 0 28px;
  border-left: 1px solid var(--accent);
  font-family: var(--serif);
  font-style: italic;
  font-size: 19px;
  line-height: 1.6;
  color: #666666;
}

.content pre {
  margin: 30px 0;
  padding: 22px 26px;
  background: #FAFAFA;
  border: 1px solid #ECECEC;
  overflow: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  color: #333333;
}
.content :not(pre) > code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: #FAFAFA;
  border: 1px solid #ECECEC;
  border-radius: 3px;
  padding: 1px 5px;
}

.katex-display { margin: 34px 0; overflow-x: auto; }

/* ---- Koenig editor cards ---- */
.content :where(.kg-card, figure) { margin: 34px 0; }
.kg-width-wide { position: relative; width: 85vw; min-width: 100%; margin-left: calc(50% - 42.5vw); margin-right: calc(50% - 42.5vw); }
.kg-width-full { position: relative; width: 100vw; margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw); }
.kg-width-full img { max-width: 100vw; }
.kg-image { display: block; margin-left: auto; margin-right: auto; }
figcaption {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--faint);
  text-align: center;
  text-transform: uppercase;
}
.kg-bookmark-card a { text-decoration: none; }

/* ---- Custom fonts (Ghost font settings) ---- */
body.has-serif-body { --serif: var(--gh-font-body, 'Newsreader'), Georgia, serif; }
body.has-sans-body { --serif: var(--gh-font-body, system-ui), sans-serif; }
body.has-serif-heading .content h2,
body.has-serif-heading .content h3 { font-family: var(--gh-font-heading, 'Newsreader'), Georgia, serif; }
body.has-sans-heading .content h2,
body.has-sans-heading .content h3 { font-family: var(--gh-font-heading, system-ui), sans-serif; }

/* ---- Post footer / back links ---- */
.back-link {
  display: inline-block;
  margin-top: 40px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
  text-decoration: none;
  text-transform: uppercase;
}
.post-foot {
  margin: 52px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--faint);
}
.contact-line {
  margin: 56px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--faint);
  text-transform: uppercase;
}
.contact-line a { color: var(--accent); text-decoration: none; }

/* ---- Pagination ---- */
.pagination {
  display: flex;
  justify-content: space-between;
  margin-top: 44px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--faint);
  text-transform: uppercase;
}
.pagination a { color: var(--accent); text-decoration: none; }

/* ---- Error page ---- */
.error {
  min-height: 560px;
  display: flex;
  flex-direction: column;
}
.error__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px 0;
}
.error__code {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}
.error__msg {
  margin: 16px 0 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 34px;
  line-height: 1.3;
  color: var(--ink);
  max-width: 520px;
  text-wrap: pretty;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .wrap { padding: 32px 24px 56px; }
  .site-title { font-size: 20px; }
  .site-nav { gap: 16px; font-size: 10.5px; }
  .site-nav a { padding: 12px 0; }
  .intro { margin-top: 44px; font-size: 18px; line-height: 1.65; }
  .post-card { padding: 32px 0; }
  .post-card__title { font-size: 23px; line-height: 1.28; }
  .post-card__excerpt { font-size: 15.5px; }
  .post-title { font-size: 30px; }
  .archive-title, .page-title { font-size: 30px; }
  .content { font-size: 17px; line-height: 1.72; }
  .content h2 { font-size: 22px; }
  .content pre { margin: 26px -24px; border-left: 0; border-right: 0; border-radius: 0; }
}