/* AI × HI — The Symbiotic Mind
   Design pass v1 — editorial, reading-first
   References: Craig Mod (primary), Aeon Magazine (secondary)
   ---------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Inter:wght@400;500;600&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Palette */
  --ink:        #1a1a1a;
  --ink-muted:  #7a7a7a;
  --ink-faint:  #b0a89e;
  --paper:      #faf9f7;
  --paper-off:  #f3f0ec;
  --border:     #e8e4df;
  --link:       #2c5282;
  --link-hover: #1a3559;

  /* Typography */
  --serif:      'Libre Baskerville', Georgia, 'Times New Roman', serif;
  --sans:       'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Layout */
  --prose:      680px;
  --gap:        2rem;
}

/* ── Base ──────────────────────────────────────────────── */

html {
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: Georgia, 'Times New Roman', serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  padding: 0 1.5rem;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(44, 82, 130, 0.35);
  transition: color 0.15s, text-decoration-color 0.15s;
}

a:hover {
  color: var(--link-hover);
  text-decoration-color: var(--link-hover);
}

/* ── The × mark — signature detail ─────────────────────── */

.times-mark {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink-muted);
  letter-spacing: 0.05em;
}

/* ── Header ─────────────────────────────────────────────── */

.site-header {
  max-width: var(--prose);
  margin: 0 auto;
  padding: 2.5rem 0 1.75rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.site-logo {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
}

.site-logo:hover { color: var(--ink); opacity: 0.65; }

nav {
  font-family: var(--sans);
  font-size: 0.82rem;
}

nav a {
  margin-left: 1.75rem;
  text-decoration: none;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}

nav a:hover {
  color: var(--ink);
  text-decoration: none;
}

nav a.active { color: var(--ink); }

/* ── Main column ─────────────────────────────────────────── */

main {
  max-width: var(--prose);
  margin: 0 auto;
  padding: 3.5rem 0 6rem;
}

/* ── Footer ─────────────────────────────────────────────── */

.site-footer {
  max-width: var(--prose);
  margin: 0 auto;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

/* ── Home — Hero ─────────────────────────────────────────── */

.hero {
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.hero-eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: var(--serif);
  font-size: 1.85rem;
  font-weight: 400;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 1.25rem;
  max-width: 580px;
}

.hero h1 em {
  font-style: italic;
}

.hero-sub {
  font-size: 1rem;
  color: var(--ink-muted);
  max-width: 520px;
  line-height: 1.65;
}

/* ── Anchor quote ─────────────────────────────────────────── */

.anchor-quote {
  margin: 3rem 0;
  padding: 1.75rem 0 1.75rem 1.5rem;
  border-left: 2px solid var(--border);
  font-family: var(--serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.7;
}

/* ── Authors strip ────────────────────────────────────────── */

.authors-strip {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--border);
}

.author {
  flex: 1;
}

.author-name {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--ink);
  margin-bottom: 0.25rem;
}

.author-role {
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-muted);
  line-height: 1.5;
}

.author-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
  min-height: 3rem;
}

/* ── Latest posts (home) ──────────────────────────────────── */

.section-label {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 1.5rem;
  margin-top: 3rem;
}

.coming-soon {
  font-family: var(--sans);
  font-size: 0.875rem;
  color: var(--ink-faint);
  font-style: italic;
}

/* ── Post list ────────────────────────────────────────────── */

.posts-header {
  margin-bottom: 2.5rem;
}

.posts-header h1 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--ink);
}

.post-list {
  list-style: none;
}

.post-list li {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.post-list li:first-child {
  border-top: 1px solid var(--border);
}

.post-meta {
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
  margin-bottom: 0.4rem;
}

.post-list h2 {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.post-list h2 a {
  text-decoration: none;
  color: inherit;
}

.post-list h2 a:hover {
  color: var(--link);
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* ── Individual post ──────────────────────────────────────── */

.post-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.post-header .post-meta {
  margin-bottom: 1rem;
}

.post-header h1 {
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 400;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 1rem;
}

.post-header .post-deck {
  font-size: 1.05rem;
  color: var(--ink-muted);
  font-style: italic;
  line-height: 1.65;
}

.post-body {
  font-size: 1rem;
  line-height: 1.8;
}

.post-body p {
  margin-bottom: 1.4rem;
}

.post-body h2 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2.5rem 0 0.75rem;
  color: var(--ink);
}

.post-body blockquote {
  margin: 2rem 0;
  padding: 1.25rem 0 1.25rem 1.5rem;
  border-left: 2px solid var(--border);
  font-style: italic;
  color: var(--ink-muted);
}

/* ── Post credit / colophon ───────────────────────────────── */

.post-credit {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

.post-credit strong {
  color: var(--ink);
  font-weight: 600;
}

/* ── About ────────────────────────────────────────────────── */

.about-header {
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.about-header h1 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.about-header .about-sub {
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.about-body p {
  margin-bottom: 1.4rem;
  color: var(--ink);
}

.about-body h2 {
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 2.5rem 0 0.75rem;
}

/* ── Responsive ──────────────────────────────────────────── */

@media (max-width: 600px) {
  html { font-size: 17px; }
  .hero h1 { font-size: 1.5rem; }
  .authors-strip { flex-direction: column; gap: 1.25rem; }
  .author-divider { display: none; }
  .site-footer { flex-direction: column; gap: 0.25rem; }
}