/* ============================================================
   prose.css — styles for all markdown-rendered pages
   (blog.html, blog.md, posts/*.md, index.md)
   Convention:
     H1  → page/post title card  (full-width hero band)
     H2  → major section         (decorated divider + large heading)
     H3  → sub-section           (bold dark label)
     H4  → micro label / tag     (small caps accent)
============================================================ */

/* ---------- Reading progress bar ---------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent));
  z-index: 1000;
  transition: width 80ms linear;
  border-radius: 0 2px 2px 0;
}

/* ---------- Prose wrapper ---------- */
/* Wraps the markdown content with comfortable max-width and centering */
.prose-wrap {
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

/* ---------- H1: Page / Post title card ---------- */
.prose-wrap h1 {
  font-family: "Newsreader", serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 36px;
  padding: 36px 40px;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  color: var(--text);
  letter-spacing: -0.01em;
}

/* ---------- H2: Major section ---------- */
.prose-wrap h2 {
  font-family: "Newsreader", serif;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--green-deep);
  margin: 52px 0 18px;
  padding-bottom: 12px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: -0.01em;
}

/* Decorative left accent bar */
.prose-wrap h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  min-width: 4px;
  height: 1.1em;
  background: linear-gradient(180deg, var(--accent), var(--accent-deep));
  border-radius: 3px;
}

/* Bottom divider line */
.prose-wrap h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent 80%);
}

/* ---------- H3: Sub-section ---------- */
.prose-wrap h3 {
  font-family: "Manrope", sans-serif;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text);
  margin: 32px 0 10px;
  padding-left: 14px;
  border-left: 2px solid var(--accent);
}

/* ---------- H4: Micro label ---------- */
.prose-wrap h4 {
  font-family: "Manrope", sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin: 24px 0 8px;
}

/* ---------- Body text ---------- */
.prose-wrap p {
  line-height: 1.78;
  color: var(--text);
  margin: 0 0 18px;
}

.prose-wrap a {
  color: var(--accent-deep);
  text-decoration: underline;
  text-decoration-color: rgba(108, 70, 48, 0.35);
  text-underline-offset: 3px;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.prose-wrap a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

/* ---------- Lists ---------- */
.prose-wrap ul,
.prose-wrap ol {
  padding-left: 1.5em;
  margin: 0 0 18px;
}

.prose-wrap li {
  line-height: 1.72;
  color: var(--text);
  margin-bottom: 6px;
}

/* ---------- Horizontal rule ---------- */
.prose-wrap hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* ---------- Blockquote ---------- */
.prose-wrap blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--accent);
  background: rgba(255, 252, 247, 0.7);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-soft);
  font-style: italic;
}

/* ---------- Inline code ---------- */
.prose-wrap code {
  font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", ui-monospace, monospace;
  font-size: 0.87em;
  background: rgba(49, 69, 58, 0.1);
  color: var(--accent-deep);
  padding: 2px 6px;
  border-radius: 5px;
  border: 1px solid rgba(49, 69, 58, 0.12);
}

/* ---------- Code blocks (dark theme) ---------- */
.prose-wrap pre {
  margin: 24px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(20, 30, 22, 0.28);
}

.prose-wrap pre code {
  display: block;
  padding: 22px 24px;
  background: #1e2820;
  color: #d4e0d7;
  font-size: 0.875rem;
  line-height: 1.65;
  border: none;
  border-radius: 0;
  overflow-x: auto;
}

/* Syntax hints for common tokens (GitHub-Dark-ish palette) */
.prose-wrap pre code .k,
.prose-wrap pre code .kw  { color: #7ec8a4; }   /* keywords */
.prose-wrap pre code .s,
.prose-wrap pre code .sr  { color: #e6b96e; }   /* strings */
.prose-wrap pre code .c,
.prose-wrap pre code .cm  { color: #6e8870; font-style: italic; } /* comments */
.prose-wrap pre code .n   { color: #a8c8b2; }   /* names */
.prose-wrap pre code .nb  { color: #88bfb0; }   /* builtins */

/* ---------- Back-to-blog button ---------- */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 28px;
  padding: 9px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 160ms, color 160ms, transform 160ms;
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.8);
  color: var(--accent-deep);
  transform: translateX(-2px);
}

.back-btn::before {
  content: "←";
  font-size: 1em;
}

/* ---------- Blog index: year group heading ---------- */
.prose-wrap .blog-year {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: "Newsreader", serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--green-deep);
  margin: 44px 0 16px;
}

.prose-wrap .blog-year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ---------- Blog index post card ---------- */
.post-card {
  display: block;
  padding: 20px 24px;
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(38, 47, 40, 0.07);
  text-decoration: none;
  color: inherit;
  transition: box-shadow 180ms, transform 180ms, background 180ms;
}

.post-card:hover {
  background: var(--surface-strong);
  box-shadow: 0 8px 28px rgba(38, 47, 40, 0.13);
  transform: translateY(-2px);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.post-card-meta .post-date {
  color: var(--text-soft);
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.post-card h3 {
  font-family: "Newsreader", serif;
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 6px;
  border: none;
  padding: 0;
}

.post-card p {
  font-size: 0.93rem;
  color: var(--text-soft);
  margin: 0;
  line-height: 1.55;
}

/* ---------- Post page wrapper ---------- */
.post-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0;
}

/* ============================================================
   Reading cards
============================================================ */

.appendix-hint {
  font-size: 0.88rem;
  color: var(--text-soft);
  margin: -6px 0 28px;
}

.appendix-hint a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
}

.reading-card {
  padding: 20px 22px;
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: 0 3px 12px rgba(38, 47, 40, 0.07);
  transition: box-shadow 180ms, transform 180ms;
}

.reading-card:hover {
  box-shadow: 0 8px 24px rgba(38, 47, 40, 0.12);
  transform: translateY(-1px);
}

.reading-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

/* Type badge */
.reading-badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.reading-badge--paper    { background: rgba(143, 100, 68, 0.12); color: var(--accent-deep); border: 1px solid rgba(143, 100, 68, 0.2); }
.reading-badge--blog     { background: rgba(87, 130, 100, 0.12); color: #3d6b4a; border: 1px solid rgba(87, 130, 100, 0.22); }
.reading-badge--tutorial { background: rgba(70, 110, 155, 0.1);  color: #2d5f8a; border: 1px solid rgba(70, 110, 155, 0.18); }
.reading-badge--tool     { background: rgba(110, 75, 155, 0.1);  color: #5a2d8a; border: 1px solid rgba(110, 75, 155, 0.18); }
.reading-badge--repo     { background: rgba(49, 69, 58, 0.1);    color: var(--green-deep); border: 1px solid rgba(49, 69, 58, 0.18); }
.reading-badge--guide    { background: rgba(180, 140, 60, 0.12); color: #7a5a10; border: 1px solid rgba(180, 140, 60, 0.2); }
.reading-badge--framework{ background: rgba(155, 60, 90, 0.1);   color: #7a2040; border: 1px solid rgba(155, 60, 90, 0.18); }
.reading-badge--book     { background: rgba(60, 120, 180, 0.1);  color: #1e4f80; border: 1px solid rgba(60, 120, 180, 0.18); }

.reading-tags {
  font-size: 0.78rem;
  color: var(--text-soft);
  letter-spacing: 0.02em;
}

/* Title inside card — override prose h4 */
.reading-card h4 {
  margin: 0 0 8px;
  padding: 0;
  font-family: "Newsreader", serif;
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text);
}

.reading-card h4 a {
  color: var(--text);
  text-decoration: none;
  transition: color 160ms;
}

.reading-card h4 a:hover {
  color: var(--accent-deep);
}

.reading-card .reading-reason {
  font-size: 0.92rem;
  color: var(--text-soft);
  line-height: 1.65;
  margin: 0;
}

/* ============================================================
   Appendix / format reference block
============================================================ */

.appendix-block {
  margin-top: 48px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

.appendix-block details {
  background: rgba(255, 252, 247, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.appendix-block summary {
  padding: 14px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-soft);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
  transition: color 160ms, background 160ms;
}

.appendix-block summary::-webkit-details-marker { display: none; }

.appendix-block summary::before {
  content: "▶";
  font-size: 0.65rem;
  transition: transform 200ms;
  color: var(--accent);
}

.appendix-block details[open] summary::before {
  transform: rotate(90deg);
}

.appendix-block summary:hover {
  color: var(--accent-deep);
  background: rgba(255, 255, 255, 0.5);
}

.appendix-content {
  padding: 0 20px 20px;
  border-top: 1px solid var(--border);
}

.appendix-content p {
  font-size: 0.9rem;
  color: var(--text-soft);
  margin: 14px 0 12px;
}

.appendix-content pre {
  margin: 0;
  box-shadow: none;
}

.appendix-content pre code {
  font-size: 0.82rem;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
}

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
  .prose-wrap h1 {
    padding: 26px 24px;
  }

  .prose-wrap pre code {
    font-size: 0.82rem;
    padding: 16px 18px;
  }
}

@media (max-width: 480px) {
  .prose-wrap h1 {
    padding: 20px 18px;
    border-radius: var(--radius-md);
  }
}