/* ============================================================
   The Agentic Stack — shared design system
   Adapted from the Agentic Commercial Model brand (fessalrahman.github.io)
   ============================================================ */

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

:root {
  --navy:    #0D1B2A;
  --navy2:   #122033;
  --navy3:   #0A151F;
  --gold:    #C9A84C;
  --gold-lt: #E8C97A;
  --cream:   #F5F0E8;
  --mist:    #8A9BB0;
  --white:   #FFFFFF;
  --rule:    rgba(201,168,76,0.25);
  --good:    #6FBF8B;
  --warn:    #D97706;
}

html { scroll-behavior: smooth; }

body {
  background: var(--navy);
  color: var(--cream);
  font-family: 'Barlow', Arial, sans-serif;
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.serif { font-family: 'Spectral', Georgia, serif; }

/* ── LAYOUT ── */
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 780px; margin: 0 auto; padding: 0 24px; }
.divider { border-top: 1px solid var(--rule); }

/* ── HEADER / NAV ── */
header.site {
  border-bottom: 1px solid var(--rule);
}
header.site nav.inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.logo {
  font-family: 'Spectral', serif;
  font-size: 1.05rem;
  color: var(--gold);
  letter-spacing: 0.03em;
  text-decoration: none;
  white-space: nowrap;
}
.logo span { color: var(--cream); }
.navlinks { display: flex; gap: 1.75rem; flex-wrap: wrap; }
.navlinks a {
  color: var(--mist);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.navlinks a:hover, .navlinks a.active { color: var(--gold); }

/* ── HERO ── */
.hero { max-width: 1100px; margin: 0 auto; padding: 5rem 24px 4rem; }
.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.1rem;
}
.hero h1 {
  font-family: 'Spectral', serif;
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  line-height: 1.12;
  color: var(--white);
  margin-bottom: 1.4rem;
  max-width: 20ch;
}
.hero h1 em { font-style: normal; color: var(--gold); }
.hero-sub {
  font-size: 1.05rem;
  color: var(--mist);
  line-height: 1.75;
  max-width: 62ch;
  margin-bottom: 1.5rem;
}
.hero-note { font-size: 0.82rem; color: var(--mist); }
.hero-note a { color: var(--mist); text-decoration: underline; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gold);
  color: var(--navy);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  border: 1px solid var(--gold);
  transition: background 0.2s, transform 0.15s;
}
.btn:hover { background: var(--gold-lt); transform: translateY(-1px); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--rule);
  color: var(--mist);
  font-weight: 400;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.8rem 1.5rem;
  transition: border-color 0.2s, color 0.2s;
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn-sm { padding: 0.55rem 1.1rem; font-size: 0.72rem; }

/* ── SECTIONS ── */
.section { max-width: 1100px; margin: 0 auto; padding: 4.5rem 24px; }
.section-narrow { max-width: 780px; margin: 0 auto; padding: 4.5rem 24px; }
.section-label {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.9rem;
}
.section h2 {
  font-family: 'Spectral', serif;
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  color: var(--white);
  line-height: 1.22;
  max-width: 32ch;
  margin-bottom: 1.2rem;
}
.section-intro { font-size: 1rem; color: var(--mist); max-width: 64ch; margin-bottom: 2.5rem; }

/* ── CATEGORY GRID (homepage) ── */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5px; background: var(--rule); border: 1px solid var(--rule); }
.cat-card {
  background: var(--navy);
  padding: 2rem 1.75rem;
  text-decoration: none;
  display: block;
  transition: background 0.2s;
}
.cat-card:hover { background: var(--navy2); }
.cat-num { font-family: 'Spectral', serif; font-size: 1.7rem; color: var(--rule); line-height: 1; margin-bottom: 0.9rem; }
.cat-card h3 { font-family: 'Spectral', serif; font-size: 1.15rem; color: var(--white); margin-bottom: 0.6rem; line-height: 1.3; }
.cat-card .layer-tag {
  font-size: 0.65rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 0.6rem; display: block;
}
.cat-card p { font-size: 0.85rem; color: var(--mist); line-height: 1.6; margin-bottom: 0.9rem; }
.cat-card .cat-arrow { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); }

/* ── VENDOR CARDS ── */
.vendor-grid { display: grid; gap: 1.25rem; }
.vendor-card {
  border: 1px solid var(--rule);
  background: var(--navy2);
  padding: 2rem 2rem 1.75rem;
  position: relative;
}
.vendor-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 3px; height: 100%; background: var(--gold);
}
.vendor-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 0.6rem; }
.vendor-name { font-family: 'Spectral', serif; font-size: 1.35rem; color: var(--white); }
.vendor-name .rank { color: var(--gold); font-size: 0.95rem; margin-right: 0.5rem; }
.vendor-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag {
  font-size: 0.62rem; font-weight: 600; letter-spacing: 0.07em; text-transform: uppercase;
  padding: 0.28rem 0.6rem; border: 1px solid var(--rule); white-space: nowrap;
}
.tag-agentic-high { color: var(--good); border-color: rgba(111,191,139,0.4); }
.tag-agentic-mid { color: var(--gold); border-color: var(--rule); }
.tag-agentic-low { color: var(--mist); border-color: var(--rule); }
.tag-affiliate { color: var(--gold); border-color: var(--rule); background: rgba(201,168,76,0.08); }
.tag-info { color: var(--mist); border-color: var(--rule); }
.tag-acquired { color: var(--warn); border-color: rgba(217,119,6,0.35); }

.vendor-meta { font-size: 0.8rem; color: var(--mist); margin-bottom: 1rem; }
.vendor-meta b { color: var(--cream); font-weight: 500; }
.vendor-desc { font-size: 0.94rem; color: var(--cream); opacity: 0.9; line-height: 1.7; margin-bottom: 1.1rem; }
.vendor-angle {
  font-size: 0.85rem; color: var(--mist); line-height: 1.6; margin-bottom: 1.25rem;
  padding: 0.9rem 1.1rem; background: var(--navy); border: 1px solid var(--rule);
}
.vendor-angle b { color: var(--gold); font-weight: 600; }
.vendor-cta-row { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.placeholder-note {
  font-size: 0.7rem; color: var(--warn); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
}

/* ── PILLARS / LAYERS (reused numbered-block pattern) ── */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5px; background: var(--rule); border: 1px solid var(--rule); }
.pillar { background: var(--navy); padding: 2rem 1.75rem; transition: background 0.2s; }
.pillar:hover { background: var(--navy2); }
.pillar-num { font-family: 'Spectral', serif; font-size: 2rem; color: var(--rule); line-height: 1; margin-bottom: 1rem; }
.pillar h3 { font-size: 0.9rem; font-weight: 600; letter-spacing: 0.04em; color: var(--gold); margin-bottom: 0.75rem; }
.pillar p { font-size: 0.88rem; color: var(--mist); line-height: 1.65; }

ol.layers { margin: 1.5rem 0; padding: 0; list-style: none; counter-reset: layer; }
ol.layers li {
  counter-increment: layer;
  padding: 1rem 0 1rem 3.25rem;
  border-bottom: 1px solid var(--rule);
  position: relative;
  font-size: 1rem;
}
ol.layers li.this-site { background: rgba(201,168,76,0.05); }
ol.layers li::before {
  content: counter(layer, decimal-leading-zero);
  position: absolute; left: 0; top: 1rem;
  font-family: 'Barlow', sans-serif; font-size: 1.05rem; font-weight: 700; color: var(--gold);
}
ol.layers li strong { display: block; font-family: 'Barlow', sans-serif; margin-bottom: 0.2rem; color: var(--white); }
ol.layers li span { color: var(--mist); font-size: 0.92rem; }
ol.layers li .here-tag {
  display: inline-block; margin-left: 0.6rem; font-size: 0.62rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--navy); background: var(--gold); padding: 0.15rem 0.5rem; vertical-align: middle;
}

/* ── TABLES ── */
table.compare { width: 100%; border-collapse: collapse; margin: 1.5rem 0 2rem; font-size: 0.86rem; }
table.compare th, table.compare td { text-align: left; padding: 0.8rem 1rem; border-bottom: 1px solid var(--rule); }
table.compare th { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--gold); font-weight: 600; }
table.compare td { color: var(--mist); }

/* ── CALLOUTS / DEFINITION BOXES ── */
.definition {
  background: var(--navy2); border: 1px solid var(--rule); border-left: 3px solid var(--gold);
  padding: 1.6rem 1.85rem; margin: 1.75rem 0; font-size: 1rem; color: var(--cream);
}
.definition strong { color: var(--gold); }
.callout {
  font-family: 'Spectral', serif; font-style: italic; font-size: 1.15rem; line-height: 1.55; color: var(--gold-lt);
  margin: 2rem 0; padding: 1.4rem 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}

/* ── CTA BAND ── */
.band { background: var(--navy2); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.band-inner {
  max-width: 1100px; margin: 0 auto; padding: 3.5rem 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
}
.band-inner h2 { font-family: 'Spectral', serif; font-size: clamp(1.3rem, 2.4vw, 1.8rem); color: var(--white); max-width: 40ch; line-height: 1.3; }
.band-inner h2 em { font-style: normal; color: var(--gold); }
.band-inner p.band-sub { color: var(--mist); font-size: 0.9rem; max-width: 44ch; margin-top: 0.5rem; }

/* ── ARTICLE / PROSE ── */
.prose p { font-size: 1rem; color: var(--cream); opacity: 0.92; margin-bottom: 1.3rem; line-height: 1.8; }
.prose h2 { font-family: 'Spectral', serif; font-size: 1.5rem; color: var(--white); margin: 2.5rem 0 1rem; }
.prose h3 { font-family: 'Barlow', sans-serif; font-size: 1rem; letter-spacing: 0.02em; color: var(--gold); margin: 1.75rem 0 0.5rem; text-transform: uppercase; font-weight: 600; }
.prose ul, .prose ol { color: var(--cream); opacity: 0.92; padding-left: 1.4rem; margin-bottom: 1.3rem; }
.prose li { margin-bottom: 0.6rem; }
.disclosure-inline {
  background: var(--navy2); border: 1px solid var(--rule); border-left: 3px solid var(--gold);
  padding: 1rem 1.25rem; font-size: 0.85rem; color: var(--mist); margin-bottom: 2rem;
}
.disclosure-inline a { color: var(--gold); }

/* ── BREADCRUMB ── */
.crumb { font-size: 0.75rem; color: var(--mist); letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 1.5rem; }
.crumb a { color: var(--mist); text-decoration: none; }
.crumb a:hover { color: var(--gold); }

/* ── FOOTER ── */
footer.site {
  max-width: 1100px; margin: 0 auto; padding: 3rem 24px;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem;
  border-top: 1px solid var(--rule);
}
.footer-name { font-family: 'Spectral', serif; font-size: 0.92rem; color: var(--gold); }
.footer-sub { font-size: 0.78rem; color: var(--mist); margin-top: 0.3rem; }
.footer-links { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.footer-links a { font-size: 0.75rem; font-weight: 400; letter-spacing: 0.08em; text-transform: uppercase; color: var(--mist); text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--gold); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .cat-grid { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr; }
  header.site nav.inner { flex-direction: column; align-items: flex-start; }
  .navlinks { gap: 1.1rem; }
  footer.site { flex-direction: column; align-items: flex-start; }
  table.compare { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}