/* ==========================================================================
   REVIVE blog — layout + typography. Inherits design tokens from globals.css
   (loaded first). Scoped to blog index (.blog-hero) and post pages (.blog-post).
   ========================================================================== */

/* ---------- shared ---------- */
.blog-post .wrap, .blog-hero .wrap { max-width: 1180px; }
.crumbs { padding: var(--s-6) 0 var(--s-4); letter-spacing: 0.12em; font-size: 0.72rem; }
.crumbs a { color: var(--text-dim); }
.crumbs a:hover { color: var(--fire); }
.crumbs span { color: var(--text-faint); margin: 0 6px; }

/* ==========================================================================
   POST PAGE
   ========================================================================== */
.blog-post { padding-top: 88px; padding-bottom: var(--s-8); }
.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: var(--s-8);
  /* NOTE: no align-items:start — the TOC column must stretch to the article's
     full height so its inner position:sticky stays pinned through the whole read. */
}
.post-body { min-width: 0; max-width: 70ch; }

.post-head { padding-bottom: var(--s-5); border-bottom: 1px solid var(--border); margin-bottom: var(--s-6); }
.post-eyebrow { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; }
.post-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.02;
  margin-top: var(--s-4);
  letter-spacing: -0.01em;
}
.post-course { font-size: 0.72rem; letter-spacing: 0.1em; margin-top: var(--s-4); }

/* body typography — tuned for long-form reading */
.post-body p { font-size: 1.075rem; line-height: 1.75; color: var(--text-soft); margin: 0 0 var(--s-4); }
.post-intro p:first-child { font-size: 1.2rem; color: var(--text); line-height: 1.7; }
.post-body h2 {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.2;
  color: var(--text);
  margin: var(--s-7) 0 var(--s-3);
  scroll-margin-top: 96px;
}
.post-body h3 {
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--text);
  margin: var(--s-5) 0 var(--s-2);
}
.post-body section { margin-bottom: var(--s-2); }
.post-body ul, .post-body ol { margin: 0 0 var(--s-4); padding-left: 1.3em; }
.post-body li { font-size: 1.05rem; line-height: 1.7; color: var(--text-soft); margin-bottom: var(--s-2); }
.post-body a { color: var(--ice); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
.post-body a:hover { color: var(--fire); }
.post-body strong { color: var(--text); font-weight: 600; }
.post-body code { font-family: var(--font-mono); font-size: 0.9em; background: var(--bg-1); padding: 1px 5px; border: 1px solid var(--border); }
.post-body .tbl-wrap { overflow-x: auto; margin: 0 0 var(--s-5); }
.post-body table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.post-body th, .post-body td { text-align: left; padding: var(--s-3); border: 1px solid var(--border); vertical-align: top; }
.post-body th { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-dim); background: var(--bg-1); }

/* Revive Tip callout */
.revive-tip {
  border: 1px solid var(--fire);
  background: linear-gradient(135deg, rgba(255,56,25,0.07), transparent 70%);
  padding: var(--s-6);
  margin: var(--s-7) 0;
  scroll-margin-top: 96px;
}
.revive-tip-label { color: var(--fire); font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; }
.revive-tip-h { font-family: var(--font-brand); font-weight: 700; font-size: 1.35rem; margin: var(--s-2) 0 var(--s-3); color: var(--text); }
.revive-tip p { margin-bottom: var(--s-3); }
.revive-tip a { color: var(--fire); font-weight: 600; }

/* What to read next */
.read-next {
  border-top: 1px solid var(--border);
  margin-top: var(--s-7);
  padding-top: var(--s-6);
  scroll-margin-top: 96px;
}
.read-next h2 { font-family: var(--font-brand); font-weight: 700; font-size: 1.25rem; color: var(--text); margin-bottom: var(--s-3); }
.read-next-link {
  display: inline-flex; align-items: center; gap: var(--s-2);
  margin-top: var(--s-3); font-family: var(--font-brand); font-weight: 600;
  color: var(--fire); text-decoration: none;
}
.read-next-link:hover { gap: var(--s-3); }

/* prev / next pager */
.post-pager { display: flex; justify-content: space-between; gap: var(--s-4); margin-top: var(--s-7); padding-top: var(--s-6); border-top: 1px solid var(--border); }
.post-pager a { display: flex; flex-direction: column; gap: 4px; max-width: 46%; color: var(--text-soft); text-decoration: none; }
.post-pager a:hover { color: var(--fire); }
.post-pager .mono { font-size: 0.68rem; letter-spacing: 0.1em; color: var(--text-dim); }
.pager-next { text-align: right; margin-left: auto; }

/* ---------- sticky table of contents ---------- */
.post-toc-wrap { position: relative; }
.post-toc { position: sticky; top: 96px; }
.toc-toggle { display: none; }
.toc-title { font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-dim); margin-bottom: var(--s-3); padding-bottom: var(--s-3); border-bottom: 1px solid var(--border); }
.toc-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; max-height: 62vh; overflow-y: auto; }
.toc-nav li a {
  display: block; padding: 6px 10px 6px 12px;
  font-size: 0.82rem; line-height: 1.35; color: var(--text-dim);
  border-left: 2px solid transparent; text-decoration: none;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.toc-nav li a:hover { color: var(--text); }
.toc-nav li a.is-active { color: var(--fire); border-left-color: var(--fire); background: rgba(255,56,25,0.05); }
.toc-nav .toc-tip a { color: var(--text-soft); }
.toc-nav .toc-next a { color: var(--text-faint); }
.toc-cta { margin-top: var(--s-4); width: 100%; justify-content: center; font-size: 0.8rem; padding: 0.6rem 1rem; }

/* ==========================================================================
   INDEX PAGE
   ========================================================================== */
.blog-hero { padding-bottom: var(--s-6); }

.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-5); }
.feat-card {
  display: flex; flex-direction: column; gap: var(--s-2);
  border: 1px solid var(--border); background: var(--bg-1);
  padding: var(--s-6); text-decoration: none;
  transition: transform var(--dur), border-color var(--dur);
}
.feat-card:hover { transform: translateY(-4px); border-color: var(--fire); }
.feat-cat { font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; }
.feat-title { font-family: var(--font-brand); font-weight: 700; font-size: 1.25rem; line-height: 1.25; color: var(--text); }
.feat-desc { font-size: 0.9rem; line-height: 1.55; flex: 1; }
.feat-meta { font-size: 0.68rem; letter-spacing: 0.1em; }

.idx-topnav { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: var(--s-5); margin-bottom: var(--s-7); }
.cat-chips { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.cat-chip {
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 6px 12px; border: 1px solid var(--border-strong); color: var(--text-soft); text-decoration: none;
}
.cat-chip:hover { border-color: var(--fire); color: var(--fire); }

.idx-cat { margin-top: var(--s-7); scroll-margin-top: 90px; }
.idx-cat-head { display: flex; align-items: baseline; gap: var(--s-4); padding-bottom: var(--s-3); border-bottom: 1px solid var(--border); margin-bottom: var(--s-4); }
.idx-cat-title { font-family: var(--font-display); font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
.idx-list { list-style: none; margin: 0; padding: 0; }
.idx-row { display: flex; align-items: baseline; gap: var(--s-4); padding: var(--s-4) 0; border-bottom: 1px solid var(--border); }
.idx-link { flex: 1; display: flex; flex-direction: column; gap: 4px; text-decoration: none; }
.idx-title { font-family: var(--font-brand); font-weight: 600; font-size: 1.1rem; color: var(--text); transition: color var(--dur-fast); }
.idx-row:hover .idx-title { color: var(--fire); }
.idx-desc { font-size: 0.88rem; line-height: 1.5; }
.idx-meta { font-size: 0.68rem; letter-spacing: 0.08em; white-space: nowrap; }

.center { text-align: center; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1000px) {
  .feat-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .blog-hero .grid-12 > div { grid-column: 1 / -1 !important; }
  .post-layout { grid-template-columns: 1fr; gap: var(--s-4); }
  .post-body { max-width: none; }
  /* leave room so the fixed bottom TOC bar never covers the last content */
  .blog-post { padding-bottom: 72px; }

  /* Mobile TOC = a small bar pinned to the bottom of the screen that expands up */
  .post-toc-wrap { position: static; }
  .post-toc {
    position: fixed; top: auto; left: 0; right: 0; bottom: 0; z-index: 60;
    background: var(--bg-1);
    border-top: 1px solid var(--border-strong);
    box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.45);
  }
  .toc-title { display: none; }
  .toc-toggle {
    display: flex; align-items: center; justify-content: space-between; gap: var(--s-3);
    width: 100%; padding: 13px 18px; background: transparent; border: 0;
    color: var(--text-soft); cursor: pointer;
    font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  }
  .toc-toggle span { transition: transform var(--dur-fast); }
  .toc-nav { display: none; padding: 0 8px calc(8px + env(safe-area-inset-bottom, 0px)); }
  .post-toc.open .toc-nav { display: block; }
  .post-toc.open .toc-toggle span { transform: rotate(180deg); }
  .toc-nav ul { max-height: 46vh; overflow-y: auto; }
  .toc-nav li a { padding: 9px 12px; font-size: 0.85rem; }
  .toc-cta { margin: 8px; width: calc(100% - 16px); }
}