/* ─── Blog — shared stylesheet ───────────────────────────────
   Reuses the design tokens of the main site (index.html / legal.css).
   Used by /blog/index.html and the individual article pages.        */

:root {
  --bg:           oklch(97.5% 0.009 78);
  --surface:      #ffffff;
  --surface-warm: oklch(96.5% 0.014 80);
  --fg:           oklch(16% 0.022 62);
  --muted:        oklch(50% 0.018 68);
  --subtle:       oklch(74% 0.016 72);
  --border:       oklch(89% 0.016 78);
  --accent:       oklch(59% 0.168 50);
  --accent-bg:    oklch(95.5% 0.030 82);

  --font-serif:  'Playfair Display', 'Iowan Old Style', Georgia, serif;
  --font-sans:   -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono:   'Fira Code', ui-monospace, SFMono-Regular, monospace;

  --max-w:       1360px;
  --read-w:      720px;
  --px:          clamp(20px, 5vw, 60px);
  --radius:      22px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  color: var(--fg);
  background: var(--bg);
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }

/* ─── Masthead (matches main site) ───────────────────────── */
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 16px var(--px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
}
.brand-mark {
  width: 38px; height: 38px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--accent-bg);
  border: 1px solid color-mix(in oklab, var(--accent) 20%, var(--border));
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--fg);
}
.brand strong { color: var(--fg); font-size: 14px; }
.masthead .nav { display: flex; flex-wrap: wrap; gap: 6px; }
.masthead .nav a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.6);
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: background 150ms, color 150ms;
}
.masthead .nav a:hover { background: var(--surface); color: var(--fg); }

/* ─── Page frame ─────────────────────────────────────────── */
.page { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--px) 90px; }
.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .10em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

/* ─── Blog index header ──────────────────────────────────── */
.blog-head { padding: clamp(32px, 6vw, 72px) 0 clamp(24px, 4vw, 44px); max-width: 640px; }
.blog-head h1 {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: -.02em;
}
.blog-head p { margin: 0; font-size: 16px; color: var(--muted); }

/* ─── Article card grid ──────────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(50,36,22,.06);
  text-decoration: none;
  color: inherit;
  transition: transform 300ms ease, box-shadow 300ms ease;
}
.post-card:hover { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(50,36,22,.11); }
.post-card-img { aspect-ratio: 3 / 2; width: 100%; object-fit: cover; background: var(--accent-bg); }
.post-card-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.post-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--subtle);
  margin-bottom: 10px;
}
.post-card h2 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.18;
  letter-spacing: -.01em;
}
.post-card p { margin: 0 0 16px; font-size: 14px; line-height: 1.65; color: var(--muted); }
.post-more {
  margin-top: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}
.post-more::after { content: " →"; }

/* ─── Article page ───────────────────────────────────────── */
.article { max-width: var(--read-w); margin: 0 auto; }
.article-hero { padding: clamp(28px, 5vw, 56px) 0 clamp(20px, 3vw, 32px); }
.article-hero h1 {
  margin: 8px 0 14px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2rem, 4.4vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -.02em;
}
.article-cover {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 0 0 clamp(24px, 4vw, 40px);
}
.article-body { font-size: 16px; line-height: 1.8; }
.article-body > :first-child { margin-top: 0; }
.article-body h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  line-height: 1.15;
  letter-spacing: -.01em;
  margin: 44px 0 14px;
}
.article-body h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  margin: 32px 0 8px;
}
.article-body h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16px;
  color: var(--accent);
  margin: 26px 0 6px;
}
.article-body p { margin: 0 0 18px; }
.article-body ul, .article-body ol { margin: 0 0 20px; padding-left: 24px; }
.article-body li { margin: 8px 0; }
.article-body strong { font-weight: 600; color: var(--fg); }
.article-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.article-body blockquote {
  margin: 24px 0;
  padding: 20px clamp(20px, 4vw, 32px);
  background: var(--accent-bg);
  border-radius: var(--radius);
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1.35;
  color: var(--fg);
}
.article-body blockquote p { margin: 0; }
.article-body figure { margin: 28px 0; }
.article-body figure img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
}
.inline-figure {
  max-width: 260px;
  margin: 24px auto;
}

/* ─── Article CTA ────────────────────────────────────────── */
.article-cta {
  margin: clamp(40px, 6vw, 64px) 0 0;
  padding: clamp(28px, 4vw, 40px);
  background: var(--fg);
  color: var(--bg);
  border-radius: var(--radius);
  text-align: center;
}
.article-cta h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  color: #fff;
}
.article-cta p { margin: 0 0 20px; color: rgba(255,255,255,.72); font-size: 15px; }
.btn-primary {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: filter 150ms;
}
.btn-primary:hover { filter: brightness(1.08); }

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 40px;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
}
.back:hover { color: var(--fg); }

/* ─── Footer (matches legal pages) ───────────────────────── */
footer.blog-foot {
  padding: 32px var(--px);
  border-top: 1px solid var(--border);
  background: var(--surface-warm);
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}
footer.blog-foot a { color: var(--muted); margin: 0 10px; text-decoration: none; }
footer.blog-foot a:hover { color: var(--fg); }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 680px) {
  .blog-grid { grid-template-columns: 1fr; }
  .masthead { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  .post-card { transition: none; }
}