/* ============================================================================
 * blog.css — parchment-styled blog (index + post viewer)
 *   Pairs with parchment-overrides.css (which paints the warm page background).
 *   Handwritten display type for chrome/headers; clean serif for body so the
 *   technical content stays readable. Maroon ink accents, hand-drawn touches.
 * ========================================================================= */

:root {
  --blog-ink:        oklch(0.22 0.04 40);
  --blog-ink-soft:   oklch(0.40 0.04 40);
  --blog-maroon:     oklch(0.45 0.15 30);
  --blog-maroon-br:  oklch(0.52 0.19 30);
  --blog-rule:       oklch(0.55 0.06 40 / 0.30);
  --blog-paper:      rgba(255, 250, 235, 0.55);
  --blog-qing:       oklch(0.45 0.12 175);
}

.blog-body {
  min-height: 100vh;
  /* Clear handwriting throughout (Latin = Patrick Hand, CJK = LXGW WenKai handwritten) */
  font-family: 'Patrick Hand', 'LXGW WenKai', 'Spectral', sans-serif;
  color: var(--blog-ink);
}

/* ----- Navbar ----- */
.blog-navbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(6px);
  background: rgba(255, 250, 238, 0.72);
  border-bottom: 1.5px solid var(--blog-rule);
}
.blog-navbar-inner {
  max-width: 880px; margin: 0 auto; padding: 0.7em 1.2em;
  display: flex; align-items: center; justify-content: space-between; gap: 1em;
}
.blog-brand { display: inline-flex; align-items: center; gap: 0.5em; text-decoration: none; }
.blog-brand-mark {
  display: inline-grid; place-items: center; width: 34px; height: 34px;
  background: #1e3a8a; color: #fff; border-radius: 8px 6px 9px 7px;
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; font-weight: 900; font-size: 19px;
  transform: rotate(-3deg);
}
.blog-brand-text {
  font-family: 'Patrick Hand', 'Caveat', cursive; font-size: 1.35em; font-weight: 700;
  color: var(--blog-maroon); letter-spacing: 0.01em;
}
.blog-nav-right { display: flex; align-items: center; gap: 1em; }
.blog-nav-home {
  font-family: 'Patrick Hand', 'Indie Flower', cursive; font-size: 1.1em; font-weight: 700;
  color: var(--blog-maroon-br); text-decoration: none;
  border-bottom: 1.5px dashed transparent; transition: border-color .18s;
}
.blog-nav-home:hover { border-bottom-color: var(--blog-maroon-br); }
.blog-lang-switch { display: inline-flex; gap: 2px; }
.blog-lang-switch button {
  font-family: 'JetBrains Mono', monospace; font-size: 0.78em; font-weight: 600;
  padding: 0.28em 0.5em; border: 1.3px solid var(--blog-rule); background: transparent;
  color: var(--blog-ink-soft); cursor: pointer; border-radius: 5px 3px 6px 4px;
  transition: all .15s;
}
.blog-lang-switch button:hover { border-color: var(--blog-maroon); color: var(--blog-maroon); }
.blog-lang-switch button.active {
  background: var(--blog-maroon); color: #fff8ef; border-color: var(--blog-maroon);
}

/* ----- Main layout ----- */
/* Narrower measure (≈68ch) — long handwriting lines are tiring to read */
.blog-main { max-width: 720px; margin: 0 auto; padding: 2.4em 1.2em 3em; }

/* ----- Index ----- */
.blog-index-head { text-align: center; margin-bottom: 2.4em; }
/* Override the parchment .section-title scrawl (Reenie Beanie) with clear Patrick Hand */
.blog-index-title {
  font-family: 'Patrick Hand', 'Caveat', cursive !important;
  font-size: 2.6em !important; margin: 0 0 0.2em !important;
}
.blog-index-tagline {
  font-family: 'Patrick Hand', 'LXGW WenKai', cursive; font-size: 1.25em;
  color: var(--blog-ink-soft); margin: 0; transform: rotate(-0.4deg);
}
.blog-post-list { display: flex; flex-direction: column; gap: 1.8em; }

.blog-card {
  display: grid; grid-template-columns: 200px 1fr; gap: 1.3em;
  text-decoration: none; color: inherit;
  padding: 1.1em; border-radius: 8px 5px 9px 6px;
  background: var(--blog-paper);
  box-shadow: 2px 4px 12px rgba(80, 40, 10, 0.08);
  border: 1.3px solid var(--blog-rule);
  transition: transform .22s cubic-bezier(0.34,1.56,0.64,1), box-shadow .22s;
}
.blog-card:hover { transform: translateY(-3px) rotate(-0.3deg); box-shadow: 3px 8px 20px rgba(80,40,10,0.16); }
.blog-card-cover { overflow: hidden; border-radius: 6px 4px 7px 5px; align-self: start; }
.blog-card-cover img { width: 100%; height: 130px; object-fit: cover; display: block; }
.blog-card-body { min-width: 0; }
.blog-card-metarow { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6em; margin-bottom: 0.4em; }
.blog-card-date { font-family: 'JetBrains Mono', monospace; font-size: 0.8em; color: var(--blog-maroon-br); }
.blog-card-read { font-size: 0.8em; color: var(--blog-ink-soft); }
.blog-card-title {
  font-family: 'Patrick Hand', 'LXGW WenKai', cursive !important; font-weight: 700; font-size: 1.5em;
  line-height: 1.25; margin: 0.1em 0 0.3em; color: var(--blog-ink);
}
.blog-card-excerpt { font-size: 0.98em; line-height: 1.6; color: var(--blog-ink-soft); margin: 0 0 0.6em; }
.blog-card-tags { display: flex; flex-wrap: wrap; gap: 0.4em; }
.blog-tag {
  font-family: 'JetBrains Mono', monospace; font-size: 0.72em;
  padding: 0.18em 0.5em; border-radius: 5px 3px 6px 4px;
  background: rgba(120, 60, 30, 0.08); color: var(--blog-maroon-br);
  border: 1px solid rgba(120, 60, 30, 0.16);
}
.blog-card-more {
  display: inline-block; margin-top: 0.6em; font-family: 'Patrick Hand', 'Indie Flower', cursive;
  font-weight: 700; font-size: 1.15em; color: var(--blog-maroon-br);
}

/* ----- Translation-status badges ----- */
.blog-badge {
  font-family: 'JetBrains Mono', monospace; font-size: 0.68em; font-weight: 600;
  padding: 0.16em 0.5em; border-radius: 4px; white-space: nowrap;
}
.blog-badge-human   { background: rgba(40,130,80,0.14);  color: oklch(0.42 0.12 150); border: 1px solid oklch(0.55 0.12 150 / .3); }
.blog-badge-ai      { background: rgba(60,90,200,0.12);  color: oklch(0.45 0.14 265); border: 1px solid oklch(0.55 0.14 265 / .3); }
.blog-badge-checked { background: rgba(150,90,20,0.13);  color: oklch(0.50 0.13 70);  border: 1px solid oklch(0.6 0.13 70 / .3); }
.blog-badge-ai_edited { background: rgba(200,120,20,0.15); color: oklch(0.48 0.15 55); border: 1px solid oklch(0.6 0.15 55 / .35); }
.blog-badge-pending { background: rgba(120,120,120,0.12);color: oklch(0.50 0.02 60);  border: 1px solid oklch(0.6 0.02 60 / .3); }
.blog-fallback-chip, .blog-fallback-note {
  font-size: 0.8em; color: var(--blog-ink-soft); font-style: italic;
}
.blog-fallback-note { margin: 0.6em 0 0; }

/* ----- Single post ----- */
.blog-back, .blog-langpill, .blog-avail-label { font-family: 'Patrick Hand', 'Indie Flower', cursive; }
.blog-back {
  display: inline-block; margin-bottom: 1em; font-size: 1.15em; font-weight: 700;
  color: var(--blog-maroon-br); text-decoration: none;
}
.blog-back:hover { text-decoration: underline wavy; }
.blog-post-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.7em;
  padding-bottom: 0.8em; margin-bottom: 0.4em; border-bottom: 1.5px dashed var(--blog-rule);
}
.blog-post-author { font-size: 0.9em; color: var(--blog-ink-soft); font-style: italic; }
.blog-post-langbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5em;
  margin: 0.8em 0 1.6em; font-size: 0.95em;
}
.blog-avail-label { color: var(--blog-ink-soft); }
.blog-langpill {
  padding: 0.2em 0.6em; border-radius: 6px 4px 7px 5px; text-decoration: none;
  border: 1.3px solid var(--blog-rule); color: var(--blog-ink-soft); font-size: 0.95em;
  transition: all .15s;
}
.blog-langpill:hover { border-color: var(--blog-qing); color: var(--blog-qing); }
.blog-langpill.active { background: var(--blog-qing); color: #fff8ef; border-color: var(--blog-qing); }

/* ===== markdown-body — readable technical content on parchment ===== */
.markdown-body {
  /* Clear handwriting body. !important to beat parchment-overrides' p/h !important rules.
     Sized down (1.22→1.05rem) + tighter leading so long-form reading isn't tiring. */
  font-family: 'Patrick Hand', 'LXGW WenKai', cursive !important;
  font-size: 1.05rem; line-height: 1.68; color: var(--blog-ink);
  letter-spacing: 0.005em;
  word-wrap: break-word;
}
.markdown-body p, .markdown-body li, .markdown-body blockquote,
.markdown-body td, .markdown-body th {
  font-family: 'Patrick Hand', 'LXGW WenKai', cursive !important;
}
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5 {
  font-family: 'Patrick Hand', 'LXGW WenKai', cursive !important; color: var(--blog-maroon);
  line-height: 1.25; margin: 1.6em 0 0.6em; scroll-margin-top: 80px;
}
/* keep code / kbd monospace even though parchment doesn't touch them */
.markdown-body code, .markdown-body pre code, .markdown-body kbd {
  font-family: 'JetBrains Mono', monospace !important;
}
.markdown-body h1 { font-size: 1.95em; font-weight: 700; margin-top: 0.2em;
  border-bottom: 2px solid var(--blog-rule); padding-bottom: 0.3em; }
.markdown-body h2 { font-size: 1.5em; font-weight: 700;
  border-bottom: 1.5px dashed var(--blog-rule); padding-bottom: 0.2em; }
.markdown-body h3 { font-size: 1.25em; font-weight: 600; }
.markdown-body h4 { font-size: 1.08em; font-weight: 600; color: var(--blog-ink); }
.markdown-body p { margin: 0.9em 0; }
.markdown-body a {
  color: var(--blog-maroon-br); text-decoration: underline;
  text-decoration-color: rgba(140,30,30,0.4); text-underline-offset: 2px;
}
.markdown-body a:hover { text-decoration-color: var(--blog-maroon-br); }
.markdown-body strong { font-weight: 700; color: var(--blog-ink); }
.markdown-body em { font-style: italic; }

/* lists */
.markdown-body ul, .markdown-body ol { margin: 0.8em 0; padding-left: 1.6em; }
.markdown-body li { margin: 0.35em 0; }
.markdown-body li > ul, .markdown-body li > ol { margin: 0.3em 0; }

/* inline code + code blocks */
.markdown-body code {
  font-family: 'JetBrains Mono', monospace; font-size: 0.88em;
  background: rgba(120, 60, 30, 0.09); padding: 0.12em 0.38em; border-radius: 4px;
  color: oklch(0.38 0.13 30);
}
.markdown-body pre {
  background: oklch(0.27 0.02 50); color: oklch(0.92 0.02 90);
  padding: 1em 1.1em; border-radius: 8px 5px 9px 6px; overflow-x: auto;
  margin: 1.1em 0; box-shadow: inset 2px 2px 8px rgba(0,0,0,0.25);
  border: 1px solid rgba(255,240,200,0.08);
}
.markdown-body pre code {
  background: none; padding: 0; font-size: 0.86em; color: inherit; border-radius: 0;
}
.markdown-body kbd {
  font-family: 'JetBrains Mono', monospace; font-size: 0.82em;
  background: rgba(255,250,235,0.9); border: 1px solid var(--blog-rule);
  border-bottom-width: 2.5px; border-radius: 4px; padding: 0.1em 0.45em; color: var(--blog-ink);
}

/* tables */
.markdown-body table {
  border-collapse: collapse; margin: 1.2em 0; width: 100%; font-size: 0.95em;
  background: rgba(255,250,238,0.5);
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--blog-rule); padding: 0.5em 0.8em; text-align: left;
}
.markdown-body th { background: rgba(120,60,30,0.1); font-weight: 700; color: var(--blog-maroon); }
.markdown-body tr:nth-child(even) td { background: rgba(120,60,30,0.03); }

/* blockquotes */
.markdown-body blockquote {
  margin: 1.1em 0; padding: 0.6em 1.1em;
  border-left: 4px solid var(--blog-maroon); border-radius: 0 6px 6px 0;
  background: rgba(140,30,30,0.05); color: var(--blog-ink-soft); font-style: italic;
}
.markdown-body blockquote p { margin: 0.4em 0; }

/* images */
.markdown-body img {
  max-width: 100%; height: auto; display: block; margin: 1.2em auto;
  border-radius: 6px 4px 7px 5px; box-shadow: 2px 4px 12px rgba(80,40,10,0.18);
}

/* horizontal rule */
.markdown-body hr { border: none; border-top: 1.5px dashed var(--blog-rule); margin: 2em 0; }

/* mermaid + katex */
.markdown-body .mermaid { text-align: center; margin: 1.4em 0; }
.markdown-body .katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.4em 0; }

.blog-loading, .blog-empty, .blog-error { text-align: center; color: var(--blog-ink-soft); padding: 2em; font-style: italic; }
.blog-error { color: var(--blog-maroon); }

/* ----- footer ----- */
.blog-footer {
  max-width: 820px; margin: 0 auto; padding: 2em 1.2em 3em; text-align: center;
  border-top: 1.5px dashed var(--blog-rule); color: var(--blog-ink-soft); font-size: 0.9em;
}
.blog-footer a { color: var(--blog-maroon-br); }
.blog-footer-note { font-family: 'Patrick Hand', 'Indie Flower', cursive; font-size: 1.05em; margin-top: 0.4em; }

/* ===== Mobile (md breakpoint) ===== */
@media (max-width: 768px) {
  .blog-main { padding: 1.5em 0.9em 2em; }
  .blog-index-title { font-size: 2.0em !important; }
  .blog-card { grid-template-columns: 1fr; gap: 0.8em; }
  .blog-card-cover img { height: 180px; }
  .blog-card-title { font-size: 1.25em; }
  .markdown-body { font-size: 1.0rem; }
  .markdown-body h1 { font-size: 1.6em; }
  .markdown-body h2 { font-size: 1.32em; }
  .markdown-body pre { font-size: 0.95em; padding: 0.8em; }
  .blog-navbar-inner { padding: 0.6em 0.9em; }
  .blog-brand-text { font-size: 1.3em; }
  .blog-lang-switch button { padding: 0.24em 0.4em; font-size: 0.72em; }
  .blog-nav-home { display: none; }   /* footer + back link cover home nav on mobile */
}