/* ──────────────────────────────────────────────────────────────────
   pages-seo · public stylesheet (blog index, blog/<slug>, p/<slug>).
   Shares the design tokens with marketing.css so the landing page and
   the blog look like one site, not two. The marketing site loads its
   own CSS; this one is loaded by the post template renderer
   (functions/_lib/page_render.js).
   ────────────────────────────────────────────────────────────────── */

/* Self-hosted webfonts (also declared in marketing.css — both files
   can be loaded standalone, and duplicate @font-face rules for the
   same family/weight/src are coalesced by the browser). */
@font-face { font-family: "Instrument Serif"; font-style: normal; font-weight: 400; font-display: swap; src: url("/_fonts/instrument-serif-400.woff2") format("woff2"); }
@font-face { font-family: "Instrument Serif"; font-style: italic; font-weight: 400; font-display: swap; src: url("/_fonts/instrument-serif-400-italic.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 400; font-display: swap; src: url("/_fonts/inter-400.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 500; font-display: swap; src: url("/_fonts/inter-500.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 600; font-display: swap; src: url("/_fonts/inter-600.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 700; font-display: swap; src: url("/_fonts/inter-700.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("/_fonts/jetbrains-mono-400.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("/_fonts/jetbrains-mono-500.woff2") format("woff2"); }


:root {
  --bg: #fbfaf7;
  --bg-2: #f3f1ec;
  --surface: #ffffff;
  --ink: #0a0a0a;
  --ink-2: #1a1a1a;
  --muted: #6b6760;
  --muted-2: #9a958c;
  --line: #e8e5dd;
  --line-strong: #d4d0c5;
  --accent: #0a0a0a;
  --highlight: #f5cf3e;
  --highlight-soft: #fef3c2;
  --link: #2c5fb9;
  --max: 760px;
  --max-wide: 1080px;
  --radius: 14px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0f12;
    --bg-2: #15171c;
    --surface: #181a1f;
    --ink: #f0eee8;
    --ink-2: #d7d5cf;
    --muted: #a09c93;
    --muted-2: #6b6760;
    --line: #262932;
    --line-strong: #353945;
    --accent: #f5cf3e;
    --highlight: #f5cf3e;
    --highlight-soft: rgba(245, 207, 62, 0.12);
    --link: #7aa8ff;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px; line-height: 1.75;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
.serif { font-family: var(--font-serif); font-weight: 400; }
.serif-i { font-family: var(--font-serif); font-style: italic; font-weight: 400; }

/* ── Header ─────────────────────────────────────────────────────── */
.nav {
  max-width: var(--max-wide); margin: 0 auto;
  padding: 22px 28px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.nav .brand {
  font-weight: 600; font-size: 1.02rem; letter-spacing: -0.01em;
  color: var(--ink); display: inline-flex; align-items: center; gap: 10px;
}
.nav .brand::before {
  content: ""; display: inline-block; width: 9px; height: 9px;
  border-radius: 50%; background: var(--ink);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--ink) 12%, transparent);
}
.nav nav { display: flex; gap: 22px; font-size: 0.92rem; }
.nav nav a { color: var(--muted); transition: color .15s; }
.nav nav a:hover, .nav nav a[aria-current] { color: var(--ink); text-decoration: none; }

/* ── Blog index page ────────────────────────────────────────────── */
.blog-index {
  max-width: var(--max); margin: 0 auto;
  padding: 64px 28px 80px;
}
.blog-index h1 {
  font-family: var(--font-sans); font-weight: 700;
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.02em; line-height: 1.2;
  margin: 0 0 14px;
}
.blog-index .lede {
  color: var(--muted); font-size: 1.1rem; margin: 0 0 48px; max-width: 580px;
}
.blog-index ul { list-style: none; padding: 0; margin: 0; }
.blog-index li {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  display: flex; gap: 20px; align-items: flex-start;
}
.blog-index li img {
  flex-shrink: 0; width: 200px; aspect-ratio: 1.7; object-fit: cover;
  border-radius: 8px; background: #000;
}
.blog-index li .blog-meta { flex: 1; min-width: 0; }
.blog-index li h2 {
  font-size: 1.25rem; font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 6px; line-height: 1.3;
}
.blog-index li h2 a { color: var(--ink); }
.blog-index li h2 a:hover { color: var(--link); text-decoration: none; }
.blog-index li .blog-date {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted-2);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px;
}
.blog-index li p {
  color: var(--muted); font-size: 0.96rem; margin: 0; line-height: 1.55;
}
@media (max-width: 600px) {
  .blog-index li { flex-direction: column; gap: 12px; }
  .blog-index li img { width: 100%; }
}

/* ── Blog post page ─────────────────────────────────────────────── */
.post-shell {
  max-width: var(--max); margin: 0 auto;
  padding: 56px 28px 80px;
}
.post-shell .crumb {
  font-family: var(--font-mono); font-size: 0.78rem;
  color: var(--muted-2); margin-bottom: 18px;
  text-transform: uppercase; letter-spacing: 0.08em;
}
.post-shell .crumb a { color: var(--muted-2); }
.post-shell .crumb a:hover { color: var(--ink); }
.post-title {
  font-family: var(--font-sans); font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 2.8rem);
  line-height: 1.25; letter-spacing: -0.015em;
  margin: 0 0 16px; color: var(--ink);
}
.post-date {
  font-family: var(--font-mono); font-size: 0.78rem;
  color: var(--muted-2); margin: 0 0 36px;
  text-transform: uppercase; letter-spacing: 0.08em;
}
/* Wrapper that reserves the hero's space + shows a shimmer skeleton
   while the SVG (or PNG, for legacy posts) is decoding. The actual
   <img> fades from opacity 0 → 1 when its load event fires. */
.post-shell .hero-wrap {
  position: relative;
  width: 100%;
  border-radius: var(--radius);
  margin: 0 0 40px;
  border: 1px solid var(--line);
  background: var(--bg-2);
  box-shadow: 0 20px 60px -20px rgba(0,0,0,0.18);
  overflow: hidden;
  isolation: isolate;
}
.post-shell .hero-wrap::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(
    100deg,
    var(--bg-2) 30%,
    color-mix(in srgb, var(--bg-2) 75%, var(--ink) 6%) 50%,
    var(--bg-2) 70%
  );
  background-size: 200% 100%;
  animation: hero-shimmer 1.8s linear infinite;
  z-index: 0;
}
.post-shell .hero {
  position: relative;
  z-index: 1;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0;
  transition: opacity .28s ease;
}
.post-shell .hero.is-loaded { opacity: 1; }
.post-shell .hero.is-loaded ~ ::before,
.post-shell .hero-wrap:has(.hero.is-loaded)::before {
  /* Stop the shimmer once the image has loaded — saves repaints. */
  animation: none; opacity: 0;
}
@keyframes hero-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .post-shell .hero-wrap::before { animation: none; opacity: 0.4; }
}

/* ── Prose body ─────────────────────────────────────────────────── */
.prose { font-size: 1.08rem; line-height: 1.8; color: var(--ink-2); }
.prose h2 {
  font-family: var(--font-sans); font-weight: 700;
  font-size: 1.55rem; letter-spacing: -0.01em;
  margin: 44px 0 14px; color: var(--ink); line-height: 1.35;
}
.prose h3 {
  font-family: var(--font-sans);
  font-size: 1.22rem; font-weight: 600; letter-spacing: -0.005em;
  margin: 32px 0 10px; color: var(--ink); line-height: 1.4;
}
.prose p { margin: 0 0 18px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 26px; }
.prose li { margin-bottom: 8px; }
/* Nested lists: tighter top/bottom so sub-items hug their parent. */
.prose li > ul, .prose li > ol { margin: 8px 0 4px; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose em { font-style: italic; }
.prose del { color: var(--muted); text-decoration: line-through; }
/* Blockquotes — editorial left rule + serif, distinct from agent callouts. */
.prose blockquote {
  margin: 28px 0; padding: 6px 0 6px 22px;
  border-left: 3px solid var(--line-strong);
  color: var(--ink-2);
  font-family: var(--font-sans); font-size: 1.08rem; line-height: 1.6;
}
.prose blockquote p { margin: 0 0 10px; }
.prose blockquote p:last-child { margin-bottom: 0; }
/* Inline content images in posts. */
.prose img {
  max-width: 100%; height: auto; display: block;
  border-radius: 10px; border: 1px solid var(--line);
  margin: 24px auto;
}
.prose a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; }
.prose code {
  font-family: var(--font-mono); font-size: 0.88em;
  background: var(--bg-2); padding: 2px 6px; border-radius: 4px;
}
/* Fenced code blocks (```lang … ```). Dark, scrollable, no inline-code
   pill styling on the inner <code>. */
.prose pre {
  background: var(--term-bg, #0d0e10);
  color: var(--term-ink, #d8dce3);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 16px 18px;
  margin: 24px 0;
  overflow-x: auto;
  font-size: 0.86rem; line-height: 1.6;
  -webkit-overflow-scrolling: touch;
}
.prose pre code {
  background: none; padding: 0; border-radius: 0;
  font-family: var(--font-mono); font-size: inherit; color: inherit;
  white-space: pre;
}

/* Agent-markup blocks (functions/_lib/agent_markup.js) */
.prose .agent-box {
  border: 1px solid var(--line); background: var(--surface);
  padding: 20px 24px; border-radius: 10px;
  margin: 28px 0; color: var(--ink);
}
.prose .agent-box.amber { border-color: rgba(245,207,62,0.5); background: var(--highlight-soft); }
.prose .agent-box.green { border-color: rgba(47,141,74,0.4); background: rgba(47,141,74,0.06); }
.prose .agent-box.red   { border-color: rgba(193,74,58,0.4); background: rgba(193,74,58,0.06); }
.prose .agent-box.blue  { border-color: rgba(44,95,185,0.4); background: rgba(44,95,185,0.06); }
.prose .agent-box.grey  { border-color: var(--line-strong); background: var(--bg-2); }
.prose .agent-callout {
  border-left: 3px solid var(--highlight);
  padding: 14px 20px; margin: 28px 0;
  background: var(--bg-2); font-size: 0.99em;
  color: var(--ink-2); border-radius: 0 6px 6px 0;
}
.prose hr {
  border: 0; border-top: 1px solid var(--line);
  margin: 48px 0;
}

/* Markdown tables (GFM). Wrapped so they scroll horizontally on mobile
   instead of breaking the layout. */
.prose .table-wrap { overflow-x: auto; margin: 28px 0; -webkit-overflow-scrolling: touch; }
.prose table {
  border-collapse: collapse; width: 100%;
  font-size: 0.95rem; line-height: 1.5;
}
.prose th, .prose td {
  padding: 10px 14px; text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.prose thead th {
  font-weight: 600; color: var(--ink);
  border-bottom: 2px solid var(--line-strong);
  background: var(--bg-2);
  white-space: nowrap;
}
.prose tbody tr:last-child td { border-bottom: 0; }
.prose tbody tr:hover { background: var(--bg-2); }
.prose td { color: var(--ink-2); }
.prose table code { font-size: 0.86em; }

/* ── Programmatic landing page (same template as blog post) ────── */
.p-page { /* alias */ }

/* ── Landing fallback page (when admin hasn't placed a real one) ─ */
.landing {
  max-width: var(--max); margin: 0 auto;
  padding: 64px 28px 80px;
}
.landing h1 {
  font-family: var(--font-serif); font-weight: 400;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  letter-spacing: -0.015em; line-height: 1.05;
  margin: 0 0 14px;
}
.landing p { color: var(--muted); }

/* ── Footer ─────────────────────────────────────────────────────── */
.foot {
  max-width: var(--max-wide); margin: 64px auto 0;
  padding: 32px 28px 40px;
  border-top: 1px solid var(--line);
  color: var(--muted-2); font-size: 0.88rem;
}
.foot a { color: var(--muted); }
.foot a:hover { color: var(--ink); }

/* ── Mobile tweaks ──────────────────────────────────────────────── */
@media (max-width: 600px) {
  .nav { padding: 16px 20px; }
  .post-shell, .blog-index, .landing { padding-left: 20px; padding-right: 20px; }
  .post-shell { padding-top: 36px; padding-bottom: 56px; }
  .post-shell .hero-wrap { aspect-ratio: 1.6 !important; margin-bottom: 28px; }
  .foot { padding: 24px 20px 32px; }
}

/* ── Read next (end-of-post card grid) ──────────────────────────── */
.read-next{
  margin: 56px 0 0;
  padding: 28px 0 0;
  border-top: 1px solid var(--line);
}
.read-next-title{
  font-family: var(--font-mono); font-weight: 500;
  font-size: 0.78rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted);
  margin: 0 0 18px;
}
.read-next-list{
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.read-next-list li{ margin: 0 }
.read-next-list a{
  display: flex; flex-direction: column; gap: 12px;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px; color: var(--ink); text-decoration: none;
  transition: border-color .2s, transform .2s;
  height: 100%;
}
.read-next-list a:hover{ border-color: var(--ink); transform: translateY(-2px); text-decoration: none; }
.read-next-list img{
  width: 100%; aspect-ratio: 1.6; object-fit: cover;
  border-radius: 6px; background: var(--bg-2);
}
.read-next-meta h3{
  font-size: 1rem; font-weight: 600; line-height: 1.3;
  margin: 0 0 6px; letter-spacing: -0.005em; color: var(--ink);
}
.read-next-meta p{
  margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.5;
}
@media (max-width: 600px){
  .read-next{ margin-top: 40px; padding-top: 24px; }
  .read-next-list{ grid-template-columns: 1fr; }
}

/* ── pager (paginated /blog archives) ────────────────────────── */
.pager {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
  margin: 48px 0 16px; padding: 16px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.pager-prev, .pager-next {
  text-decoration: none;
  color: var(--ink);
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
}
.pager-prev:hover, .pager-next:hover { border-color: var(--link); color: var(--link); }
.pager-nums { display: inline-flex; gap: 4px; flex-wrap: wrap; }
.pager-num {
  text-decoration: none; color: var(--ink-dim);
  padding: 6px 10px; border-radius: 6px; min-width: 28px; text-align: center;
}
.pager-num:hover { color: var(--link); }
.pager-current {
  background: var(--ink); color: var(--bg, #fff);
  font-weight: 600;
}
.pager-pos {
  margin-left: auto;
  color: var(--ink-faint, #888);
  font-size: 12px;
}
.page-suffix { color: var(--ink-faint, #888); font-weight: 400; font-size: 0.7em; }

/* ── /blog header + search ─────────────────────────────────── */
.blog-index-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  margin-bottom: 24px;
}
.blog-index-head h1 { margin: 0 0 4px; }
.blog-index-head .lede { margin: 0; }
.blog-search {
  display: flex; align-items: center; gap: 0;
  background: var(--bg-2, #f3f1ec);
  border: 1px solid var(--line, rgba(0,0,0,0.1));
  border-radius: 8px;
  padding: 2px 2px 2px 12px;
  min-width: min(280px, 100%);
}
.blog-search:focus-within {
  border-color: var(--link, #4a90e2);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.15);
}
.blog-search input {
  background: transparent;
  border: 0;
  font: inherit;
  font-size: 14px;
  padding: 8px 8px 8px 0;
  color: var(--ink);
  flex: 1;
  outline: none;
  min-width: 0;
}
.blog-search input::placeholder { color: var(--ink-faint, #888); }
.blog-search-go {
  background: var(--ink, #0a0a0a);
  color: var(--bg, #fff);
  border: 0;
  border-radius: 6px;
  width: 32px; height: 32px;
  font: inherit; font-size: 16px;
  cursor: pointer;
}
.blog-search-go:hover { opacity: 0.85; }
.blog-empty {
  margin: 24px 0;
  padding: 24px;
  text-align: center;
  color: var(--ink-dim, #6a7484);
  background: var(--bg-2, #f3f1ec);
  border-radius: 8px;
  font-size: 14px;
}
.pager-single {
  border-top: 1px solid var(--line, rgba(0,0,0,0.1));
  padding: 14px 0 0;
  margin: 32px 0 8px;
  justify-content: flex-end;
}