/* ============================================================
   Blog layout — design-agnostic.
   Blog pages reuse a design's <head> links, header, footer and
   scripts verbatim (tools/lib/render-post.js); this file only lays
   out the article/cards and maps each design's own variables onto
   --blog-* tokens. The designs themselves are never restyled.
   ============================================================ */

body.blog {
  /* safe defaults for any design that lacks usable variables */
  --blog-accent: var(--chat-accent, #4348c8);
  --blog-ink: #1c2333;
  --blog-muted: #6b7280;
  --blog-bg: #ffffff;
  --blog-surface: #f6f6f8;
  --blog-line: rgba(0, 0, 0, 0.12);
  --blog-head: inherit;
  --blog-body: inherit;
  --blog-btn-font: inherit;
  --blog-btn-transform: none;
  --blog-btn-spacing: 0.02em;
  --blog-radius: 12px;
  --blog-hero-bg: var(--blog-surface);
  --blog-hero-ink: var(--blog-ink);
  --blog-hero-muted: var(--blog-muted);
  background: var(--blog-bg);
  color: var(--blog-ink);
}

/* ---- per-design token mapping (design CSS untouched) ---- */
body[data-design="b"].blog {
  --blog-accent: var(--accent-deep);
  --blog-ink: var(--ink);
  --blog-muted: var(--mute-l);
  --blog-bg: var(--paper);
  --blog-surface: #ffffff;
  --blog-line: var(--line-l);
  --blog-head: var(--disp);
  --blog-body: var(--body);
  --blog-btn-font: var(--disp);
  --blog-btn-transform: uppercase;
  --blog-btn-spacing: 0.06em;
  --blog-radius: 0;
  --blog-hero-bg: var(--coal);
  --blog-hero-ink: #ffffff;
  --blog-hero-muted: var(--mute-d);
}
/* B's header is fixed + transparent over its dark hero; the blog head is a
   dark band too, and we keep the bar solid so the article never sits under a
   see-through header. */
body[data-design="b"].blog .hdr { background: rgba(14, 17, 22, 0.92); backdrop-filter: blur(10px); }
body[data-design="b"].blog .post-head,
body[data-design="b"].blog .blog-head { padding-top: 130px; }
body[data-design="b"].blog .post-kicker a { color: var(--accent); }
body[data-design="b"].blog .post-kicker { color: var(--accent); }

body[data-design="d"].blog {
  --blog-accent: var(--bronze-deep);
  --blog-ink: var(--ink);
  --blog-muted: var(--muted);
  --blog-bg: var(--bone);
  --blog-surface: var(--paper);
  --blog-line: var(--line);
  --blog-head: var(--serif);
  --blog-body: var(--sans);
  --blog-btn-font: var(--sans);
  --blog-btn-transform: uppercase;
  --blog-btn-spacing: 0.14em;
  --blog-radius: 0;
}
body[data-design="d"].blog .post h1,
body[data-design="d"].blog .blog-head h1 { font-weight: 500; }

body[data-design="h"].blog {
  --blog-accent: var(--red);
  --blog-ink: var(--ink);
  --blog-muted: var(--mute);
  --blog-bg: var(--paper);
  --blog-surface: var(--tint);
  --blog-line: var(--rule);
  --blog-head: var(--serif);
  --blog-body: var(--sans);
  --blog-btn-font: var(--sans);
  --blog-btn-transform: none;
  --blog-btn-spacing: 0.02em;
  --blog-radius: 0;
}
body[data-design="h"].blog .post-head,
body[data-design="h"].blog .blog-head { border-bottom: 3px solid var(--ink); --blog-hero-bg: transparent; }

/* ---- page frame ---- */
.blog-wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px 80px; }

/* article head — full-bleed band via a pseudo element */
.post-head, .blog-head {
  position: relative; max-width: 72ch; margin: 0 auto;
  padding: 64px 0 34px; color: var(--blog-hero-ink);
}
.post-head::before, .blog-head::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 100vw;
  transform: translateX(-50%); background: var(--blog-hero-bg); z-index: -1;
}
.post-kicker {
  font-family: var(--blog-body); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--blog-accent); margin: 0 0 16px;
}
.post-kicker a { color: inherit; text-decoration: none; }
.post-kicker a:hover { text-decoration: underline; }
.post h1, .blog-head h1 {
  font-family: var(--blog-head); font-size: clamp(2.1rem, 4.6vw, 3.4rem); line-height: 1.08;
  margin: 0 0 18px; color: inherit;
}
.post-excerpt { font-size: 1.15rem; line-height: 1.55; color: var(--blog-hero-muted); max-width: 60ch; margin: 0; }
.post-byline { margin: 20px 0 0; font-size: 0.9rem; color: var(--blog-hero-muted); }
.post-byline b { color: inherit; font-weight: 700; }

.post-cover { max-width: 960px; margin: 40px auto 44px; }
.post-cover img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: var(--blog-radius); }

/* ---- article body ---- */
.post-body {
  max-width: 72ch; margin: 0 auto; font-family: var(--blog-body);
  font-size: 1.08rem; line-height: 1.75; color: var(--blog-ink);
}
.post-body > * + * { margin-top: 1.1em; }
.post-body h2, .post-body h3, .post-body h4 {
  font-family: var(--blog-head); color: var(--blog-ink); line-height: 1.2; letter-spacing: 0;
}
.post-body h2 { font-size: 1.7rem; margin-top: 2.1em; }
.post-body h3 { font-size: 1.3rem; margin-top: 1.8em; }
.post-body p { margin-bottom: 0; }
.post-body a { color: var(--blog-accent); }
.post-body ul, .post-body ol { padding-left: 1.4em; }
.post-body li + li { margin-top: 0.4em; }
.post-body blockquote {
  margin: 1.4em 0; padding: 0.2em 0 0.2em 1.2em; border-left: 3px solid var(--blog-accent);
  color: var(--blog-muted); font-style: italic;
}
.post-body code { font-size: 0.92em; background: var(--blog-surface); padding: 0.1em 0.35em; border-radius: 4px; }
.post-body hr { border: 0; border-top: 1px solid var(--blog-line); margin: 2.4em 0; }
.post-body img { max-width: 100%; height: auto; }

/* ---- CTA block ---- */
.post-cta {
  max-width: 72ch; margin: 56px auto 0; padding: 30px 30px 32px;
  background: var(--blog-surface); border: 1px solid var(--blog-line); border-radius: var(--blog-radius);
  text-align: center;
}
.post-cta h2 { font-family: var(--blog-head); font-size: 1.7rem; line-height: 1.15; margin: 0 0 8px; color: var(--blog-ink); }
.post-cta p { color: var(--blog-muted); margin: 0 0 20px; }
.post-cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.post-btn {
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
  font-family: var(--blog-btn-font); font-weight: 700; font-size: 1rem;
  text-transform: var(--blog-btn-transform); letter-spacing: var(--blog-btn-spacing);
  padding: 13px 24px; border-radius: var(--blog-radius); transition: transform 0.15s ease, filter 0.15s ease;
}
.post-btn:hover { transform: translateY(-2px); filter: brightness(1.06); }
.post-btn-fill { background: var(--blog-accent); color: #fff; }
.post-btn-line { border: 2px solid var(--blog-accent); color: var(--blog-accent); }

/* ---- author box ---- */
.post-author {
  max-width: 72ch; margin: 28px auto 0; display: flex; gap: 20px; align-items: flex-start;
  padding: 24px 0 0; border-top: 1px solid var(--blog-line);
}
.post-author-img { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; flex: none; }
.post-author-name { margin: 0 0 6px; font-family: var(--blog-head); font-size: 1.25rem; line-height: 1.2; color: var(--blog-ink); }
.post-author-name span { display: block; font-family: var(--blog-body); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--blog-accent); margin-top: 4px; }
.post-author-bio { margin: 0; color: var(--blog-muted); font-size: 0.95rem; line-height: 1.6; }

/* ---- more posts / index cards ---- */
.post-more { max-width: 1140px; margin: 72px auto 0; padding-top: 44px; border-top: 1px solid var(--blog-line); }
.post-more h2 { font-family: var(--blog-head); font-size: 1.6rem; line-height: 1.2; margin: 0 0 22px; color: var(--blog-ink); }
.blog-index .blog-grid { margin-top: 44px; }
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.blog-card {
  display: flex; flex-direction: column; background: var(--blog-surface);
  border: 1px solid var(--blog-line); border-radius: var(--blog-radius); overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.blog-card:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(0, 0, 0, 0.1); }
.blog-card-media { display: block; background: var(--blog-line); }
.blog-card-media img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.blog-card-body { padding: 18px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.blog-card-meta { margin: 0; font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--blog-muted); }
.blog-card-title { font-family: var(--blog-head); font-size: 1.35rem; line-height: 1.2; margin: 8px 0 8px; color: var(--blog-ink); letter-spacing: 0; }
.blog-card-title a { color: inherit; text-decoration: none; }
.blog-card-title a:hover { color: var(--blog-accent); }
.blog-card-excerpt { margin: 0; color: var(--blog-muted); font-size: 0.95rem; line-height: 1.55; }
.blog-card-more { margin-top: auto; padding-top: 14px; color: var(--blog-accent); font-weight: 700; text-decoration: none; font-size: 0.95rem; }
.blog-card-more:hover { text-decoration: underline; }
.blog-index .post-cta { margin-top: 56px; }

/* the design switcher + chat launcher sit bottom-left/right; give the footer room */
@media (max-width: 720px) {
  .blog-wrap { padding: 0 20px 60px; }
  .post-head, .blog-head { padding-top: 44px; padding-bottom: 28px; }
  body[data-design="b"].blog .post-head, body[data-design="b"].blog .blog-head { padding-top: 96px; }
  .post-cover { margin: 26px auto 30px; }
  .post-body { font-size: 1.03rem; }
  .post-cta { padding: 24px 18px 26px; }
  .post-author { flex-direction: column; align-items: flex-start; }
}
