/* WYDM blog — styles for the server-rendered /blog pages (Pages Functions).
 * Mobile first. Colours, fonts, radii and shadows come from tokens.css
 * (generated by infra/scripts/sync-tokens.mjs); dark mode follows the OS.
 * The nav and footer mirror src/web/src/components/PublicShell.{tsx,css}.
 */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 88px; }

body.blog {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.blog main { flex: 1; }
.blog a { color: var(--coral-ink); text-decoration: none; }
.blog a:hover { color: var(--coral); }
.blog :focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; border-radius: 4px; }
.blog img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--coral-soft); color: var(--coral-ink); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 50;
  background: var(--ink); color: var(--bg) !important; padding: 10px 16px; border-radius: var(--radius-pill);
  font-weight: 600; font-size: 14px;
}
.skip-link:focus { top: 12px; }

.display {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-wrap: balance;
}
.display em { font-style: italic; color: var(--coral); }

/* The brand's handwriting — small notes pencilled in the margin. */
.hand-note {
  margin: 0 0 6px;
  font-family: var(--font-hand);
  font-weight: 600;
  font-size: 24px;
  line-height: 1;
  color: var(--coral);
  transform: rotate(-3deg);
  transform-origin: left center;
  display: inline-block;
}

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 18px 64px; }

/* ── Nav (mirrors PublicShell.css) ───────────────────────────────────── */
.public-shell-nav {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.public-shell-nav .ps-mark { display: inline-flex; align-items: baseline; gap: 6px; color: var(--ink); }
.public-shell-nav .ps-wordmark {
  font-family: var(--font-display); font-optical-sizing: auto;
  font-size: 28px; font-style: italic; font-weight: 500; letter-spacing: -0.5px; line-height: 1.2;
}
.ps-dot { width: 6px; height: 6px; border-radius: 6px; background: var(--coral); display: inline-block; }
.public-shell-nav .ps-links {
  position: absolute; top: 100%; left: 0; right: 0; background: var(--bg);
  border-bottom: 1px solid var(--line); box-shadow: var(--shadow-card);
  flex-direction: column; align-items: stretch; gap: 2px;
  padding: 10px 18px 20px; display: none;
}
.public-shell-nav.open .ps-links { display: flex; }
.public-shell-nav .ps-link {
  padding: 14px 4px; font-size: 16px; color: var(--ink-2); font-weight: 500;
  border-bottom: 1px solid var(--line);
}
.public-shell-nav .ps-link:hover { color: var(--ink); }
.public-shell-nav .ps-cta {
  margin-top: 12px; padding: 15px; font-size: 15px; text-align: center;
  background: var(--ink); color: var(--bg); border-radius: var(--radius-pill);
  font-weight: 600; white-space: nowrap;
}
.public-shell-nav .ps-cta:hover { color: var(--bg); }
.public-shell-nav .ps-divider { display: none; width: 1px; height: 22px; background: var(--line); margin: 0 6px; }
.public-shell-nav .ps-menu-toggle {
  display: flex; width: 44px; height: 44px; border: 0; background: transparent;
  cursor: pointer; flex-direction: column; justify-content: center; gap: 5px; padding: 0;
}
.public-shell-nav .ps-menu-toggle span {
  display: block; height: 2px; width: 22px; background: var(--ink); margin: 0 auto;
  border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease;
}
.public-shell-nav.open .ps-menu-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.public-shell-nav.open .ps-menu-toggle span:nth-child(2) { opacity: 0; }
.public-shell-nav.open .ps-menu-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Signed-in swap, driven by the inline auth script on <html>. */
.ps-signed-in { display: none !important; }
.signed-in .ps-signed-in { display: block !important; }
.signed-in .ps-signed-out { display: none !important; }

@media (min-width: 721px) {
  .public-shell-nav { padding: 18px 40px; }
  .public-shell-nav .ps-menu-toggle { display: none; }
  .public-shell-nav .ps-links {
    position: static; display: flex; flex-direction: row; align-items: center; gap: 8px;
    padding: 0; background: none; border: 0; box-shadow: none;
  }
  .public-shell-nav .ps-link { padding: 8px 14px; font-size: 13px; border: 0; }
  .public-shell-nav .ps-link[aria-current="page"] { color: var(--ink); }
  .public-shell-nav .ps-cta { margin: 0; padding: 10px 18px; font-size: 13px; }
  .public-shell-nav .ps-divider { display: block; }
  .signed-in .ps-signed-in { display: inline-block !important; }
}

/* ── Footer (mirrors PublicShell's footer) ───────────────────────────── */
.ps-footer {
  padding: 40px 18px 60px; border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  font-size: 12px; color: var(--ink-3);
}
.ps-footer-mark { display: flex; align-items: center; gap: 8px; }
.ps-footer-word { font-family: var(--font-display); font-size: 18px; font-style: italic; font-weight: 500; color: var(--ink); }
.ps-footer .ps-dot { width: 4px; height: 4px; }
.ps-footer-note { margin-left: 6px; }
.ps-footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.blog .ps-footer-links a { color: inherit; }
.blog .ps-footer-links a:hover { color: var(--ink); }
@media (min-width: 721px) { .ps-footer { padding: 40px 40px 60px; } }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn-ink, .btn-coral {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 24px; border-radius: var(--radius-pill);
  font-weight: 600; font-size: 15px; white-space: nowrap;
}
.blog .btn-ink { background: var(--ink); color: var(--bg); }
.blog .btn-ink:hover { color: var(--bg); }
.blog .btn-coral { background: var(--coral); color: #fff; box-shadow: var(--shadow-coral-glow); }
.blog .btn-coral:hover { color: #fff; filter: brightness(1.05); }

/* ── Blog home hero + search ─────────────────────────────────────────── */
.blog-hero { padding: 40px 0 24px; }
.blog-hero-title { margin: 0 0 24px; font-size: clamp(44px, 12vw, 104px); }

.search { display: flex; gap: 8px; max-width: 520px; }
.search input {
  flex: 1; min-width: 0; height: 48px; padding: 0 18px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-pill);
  background: var(--surface); color: var(--ink); font: inherit; font-size: 16px;
}
.search input::placeholder { color: var(--ink-3); }
.search input:focus { outline: 2px solid var(--coral); outline-offset: 1px; }
.search button {
  height: 48px; padding: 0 20px; border: 0; border-radius: var(--radius-pill);
  background: var(--ink); color: var(--bg); font: inherit; font-weight: 600; font-size: 15px; cursor: pointer;
}

/* ── Topic + tag chips ───────────────────────────────────────────────── */
.chips { margin: 8px -18px 32px; overflow-x: auto; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chips ul, .tags { display: flex; gap: 8px; list-style: none; margin: 0; padding: 0 18px; }
.chips li, .tags li { flex: none; }
.blog .chip {
  display: inline-block; padding: 8px 14px; border-radius: var(--radius-pill);
  background: var(--chip); color: var(--ink-2); font-size: 14px; font-weight: 500; white-space: nowrap;
}
.blog .chip:hover { color: var(--ink); background: var(--surface-2); }
.blog .chip[aria-current="page"] { background: var(--ink); color: var(--bg); }
.tags { flex-wrap: wrap; padding: 0; margin: 40px 0 0; }

/* ── Featured post ───────────────────────────────────────────────────── */
.featured {
  display: grid; gap: 20px; margin: 0 0 56px;
}
.featured .card-cover { border-radius: var(--radius-photo); }
.featured-body { position: relative; }
.featured-body .hand-note { position: absolute; top: -34px; right: 4px; font-size: 28px; }
.featured-title { margin: 6px 0 12px; font-size: clamp(30px, 7vw, 52px); }
.blog .featured-title a { color: var(--ink); }
.blog .featured-title a:hover { color: var(--coral-ink); }
.featured-excerpt { margin: 0 0 14px; color: var(--ink-2); font-size: 17px; max-width: 52ch; }

/* ── Cards ───────────────────────────────────────────────────────────── */
.section-title {
  margin: 0 0 20px; padding-top: 20px; border-top: 1px solid var(--line-strong);
  font-family: var(--font-display); font-weight: 500; font-size: 26px; letter-spacing: -0.01em; line-height: 1.2;
}
.blog .section-title a { color: var(--coral-ink); }

.card-grid { display: grid; gap: 36px 24px; grid-template-columns: 1fr; margin-bottom: 40px; }
.card { display: flex; flex-direction: column; gap: 14px; position: relative; }
.card-cover {
  width: 100%; aspect-ratio: 1200 / 630; object-fit: cover;
  border-radius: var(--radius-md); background: var(--surface-2);
}
/* No cover: the topic name set as type. */
.card-cover--blank {
  display: flex; align-items: flex-end; padding: 18px 20px;
  background: var(--coral-soft); color: var(--coral-ink);
  font-family: var(--font-display); font-style: italic; font-weight: 500;
  font-size: clamp(26px, 6vw, 40px); line-height: 1; letter-spacing: -0.02em;
}
.card-body { display: flex; flex-direction: column; gap: 6px; }
.blog .card-pillar {
  align-self: flex-start; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--coral-ink);
}
.card-title {
  margin: 0; font-family: var(--font-display); font-optical-sizing: auto; font-weight: 500;
  font-size: 22px; line-height: 1.2; letter-spacing: -0.01em; text-wrap: balance;
}
.blog .card-title a { color: var(--ink); }
.blog .card-title a:hover { color: var(--coral-ink); }
.card-excerpt { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.55; }
.card-meta { margin: 4px 0 0; font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); letter-spacing: 0.01em; }

/* ── Pagination ──────────────────────────────────────────────────────── */
.pagination {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px;
  padding-top: 20px; border-top: 1px solid var(--line);
}
.blog .page-link { font-weight: 600; color: var(--ink); padding: 10px 0; }
.blog .page-link[rel="next"] { justify-self: end; }
.page-num { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }

.empty { color: var(--ink-3); font-size: 17px; margin: 32px 0 48px; }

/* ── Topic + tag hubs ────────────────────────────────────────────────── */
.hub-head { padding: 32px 0 20px; max-width: 760px; }
.hub-title { margin: 8px 0 16px; font-size: clamp(40px, 10vw, 80px); }
.hub-intro { margin: 0; font-size: 18px; color: var(--ink-2); max-width: 60ch; }

.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; font-size: 14px; }
.breadcrumb li + li::before { content: "›"; margin-right: 6px; color: var(--ink-4); }
.blog .breadcrumb a { color: var(--ink-3); font-weight: 500; }
.blog .breadcrumb a:hover { color: var(--ink); }

/* ── Article ─────────────────────────────────────────────────────────── */
.article { width: 100%; max-width: 1160px; margin: 0 auto; padding: 28px 18px 0; }
.article-head { max-width: 820px; margin: 0 auto 28px; }
.article-title { margin: 18px 0 16px; font-size: clamp(36px, 9vw, 68px); }
.article-dek {
  margin: 0 0 20px; font-family: var(--font-display); font-optical-sizing: auto; font-weight: 400;
  font-size: clamp(19px, 4.4vw, 23px); line-height: 1.4; color: var(--ink-2);
}
.byline { margin: 0; font-family: var(--font-mono); font-size: 13px; color: var(--ink-3); }
.byline-author { color: var(--ink); font-weight: 500; }

.article-cover { margin: 0 -18px 32px; }
.article-cover img {
  width: 100%; aspect-ratio: 1200 / 630; object-fit: cover; background: var(--surface-2);
}

.article-grid { display: grid; grid-template-columns: minmax(0, 1fr); }
.article-main { max-width: 68ch; width: 100%; margin: 0 auto; }
.article-aside { display: none; }

.toc-h, .toc summary {
  font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3);
}
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0; }
.blog .toc a { display: block; padding: 6px 0; color: var(--ink-2); font-size: 14.5px; line-height: 1.4; }
.blog .toc a:hover { color: var(--coral-ink); }
.toc .toc-l3 a { padding-left: 14px; font-size: 14px; color: var(--ink-3); }

.toc-inline {
  margin: 0 0 32px; padding: 4px 18px; border: 1px solid var(--line-strong); border-radius: var(--radius-md);
  background: var(--bg-2);
}
.toc-inline summary { padding: 12px 0; cursor: pointer; list-style: none; display: flex; justify-content: space-between; }
.toc-inline summary::-webkit-details-marker { display: none; }
.toc-inline summary::after { content: "+"; font-size: 18px; line-height: 1; color: var(--ink-2); }
.toc-inline[open] summary::after { content: "–"; }
.toc-inline nav { padding-bottom: 12px; }

@media (min-width: 720px) {
  .wrap { padding: 0 40px 80px; }
  .chips { margin: 8px -40px 40px; }
  .chips ul { padding: 0 40px; }
  .blog-hero { padding: 64px 0 32px; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article { padding: 40px 40px 0; }
  .article-cover { margin: 0 0 48px; }
  .article-cover img { border-radius: var(--radius-photo); }
  .featured { grid-template-columns: 1.35fr 1fr; align-items: center; gap: 40px; }
  .featured-body .hand-note { position: static; margin-bottom: 10px; display: block; width: max-content; }
}

@media (min-width: 1024px) {
  .card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .article.has-toc .article-grid { grid-template-columns: 220px minmax(0, 68ch); justify-content: center; gap: 64px; }
  .article.has-toc .article-head { max-width: calc(220px + 64px + 68ch); padding-left: calc(220px + 64px); }
  .article-aside { display: block; }
  .toc-side { position: sticky; top: 104px; max-height: calc(100vh - 128px); overflow-y: auto; }
  .toc-side .toc-h { margin: 6px 0 10px; }
  .toc-inline { display: none; }
  .article-main { margin: 0; }
  .article:not(.has-toc) .article-main { margin: 0 auto; }
}

/* ── Prose (post body from the markdown renderer) ────────────────────── */
.prose { font-size: 18px; line-height: 1.7; color: var(--ink); overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose pre, .prose figure, .prose table { margin: 0 0 1.3em; }
.prose > p:first-of-type::first-letter {
  float: left; margin: 0.06em 0.1em 0 0;
  font-family: var(--font-display); font-style: italic; font-weight: 500;
  font-size: 3.6em; line-height: 0.85; color: var(--coral);
}
.prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display); font-optical-sizing: auto; font-weight: 500;
  letter-spacing: -0.01em; line-height: 1.2; text-wrap: balance;
}
.prose h2 { margin: 2em 0 0.6em; font-size: 30px; }
.prose h3 { margin: 1.6em 0 0.5em; font-size: 23px; }
.prose h4 { margin: 1.4em 0 0.4em; font-size: 19px; }
.prose a { text-decoration: underline; text-decoration-color: var(--coral-soft); text-underline-offset: 3px; text-decoration-thickness: 2px; }
.prose a:hover { text-decoration-color: var(--coral); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: 0.35em 0; }
.prose li::marker { color: var(--coral); }
.prose strong { font-weight: 600; }
.prose blockquote {
  padding: 0 0 0 20px; border-left: 3px solid var(--coral);
  font-family: var(--font-display); font-style: italic; font-size: 1.15em; line-height: 1.5; color: var(--ink-2);
}
.prose code {
  font-family: var(--font-mono); font-size: 0.86em; padding: 0.12em 0.35em;
  background: var(--chip); border-radius: 6px;
}
.prose pre {
  padding: 16px 18px; overflow-x: auto; background: var(--surface-2); border-radius: var(--radius-md);
  font-size: 14.5px; line-height: 1.55;
}
.prose pre code { padding: 0; background: none; font-size: inherit; }
.prose img { border-radius: var(--radius-md); background: var(--surface-2); }
.prose figure img { width: 100%; }
.prose figcaption { margin-top: 8px; font-size: 14px; color: var(--ink-3); }
.prose hr { border: 0; height: 1px; background: var(--line-strong); margin: 2.4em 0; }
.prose table { width: 100%; border-collapse: collapse; font-size: 16px; display: block; overflow-x: auto; }
.prose th, .prose td { padding: 10px 12px; border-bottom: 1px solid var(--line-strong); text-align: left; }
.prose th { font-weight: 600; }

/* ── Product CTA ─────────────────────────────────────────────────────── */
.product-cta {
  margin: 48px 0 0; padding: 28px 24px;
  border-radius: var(--radius-card); background: var(--ink); color: var(--bg);
  display: flex; flex-direction: column; align-items: flex-start; gap: 20px;
}
.product-cta-lead { margin: 0; font-size: clamp(24px, 5vw, 30px); line-height: 1.15; color: var(--bg); }

/* ── Related ─────────────────────────────────────────────────────────── */
.related { width: 100%; max-width: 1160px; margin: 72px auto 0; padding: 0 18px 64px; }
@media (min-width: 720px) {
  .product-cta { flex-direction: row; align-items: center; justify-content: space-between; padding: 32px 36px; }
  .related { padding: 0 40px 80px; }
}

/* ── Error pages ─────────────────────────────────────────────────────── */
.blog-error { max-width: 640px; margin: 0 auto; padding: 96px 18px 120px; }
.blog-error h1 { margin: 6px 0 16px; font-size: clamp(36px, 9vw, 60px); }
.blog-error p:not(.hand-note) { margin: 0 0 28px; font-size: 18px; color: var(--ink-2); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}