/* ═══════════════════════════════════════════════════════════════
   Atlas Bio — shared site stylesheet
   Brand: slate-blue gradient header + amber accent + hexagon logo
   ═══════════════════════════════════════════════════════════════ */

:root {
  --slate-950: #020617;
  --slate-900: #0f172a;
  --slate-800: #1e293b;
  --slate-700: #334155;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50:  #f8fafc;
  --amber-700: #b45309;
  --amber-600: #d97706;
  --amber-500: #f59e0b;
  --amber-400: #fbbf24;
  --amber-100: #fef3c7;
  --amber-50:  #fffbeb;
  --green-700: #15803d;
  --green-600: #16a34a;
  --green-500: #22c55e;
  --green-100: #dcfce7;
  --red-600:   #dc2626;
  --red-100:   #fee2e2;
  --ink:       #1f2937;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #ffffff;
  color: var(--ink);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--slate-800); text-decoration: none; }
a:hover { color: var(--amber-600); }

/* ─── Top nav ─── */
nav.top {
  position: sticky; top: 0; z-index: 100;
  background: #ffffff;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
nav.top .inner {
  max-width: 1200px; margin: 0 auto;
  padding: 8px 32px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
nav.top .brand {
  display: inline-grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: 10px;
  row-gap: 0;
  color: var(--slate-900); font-weight: 700; font-size: 17px;
  letter-spacing: -0.2px;
  line-height: 1;
}
nav.top .brand:hover { color: var(--amber-600); }
nav.top .brand .logo-svg { grid-column: 1; grid-row: 1; width: 30px; height: 30px; align-self: center; }
nav.top .brand .name-text { grid-column: 2; grid-row: 1; align-self: center; }
nav.top .brand .name-text span { color: var(--amber-600); font-weight: 800; }
nav.top .links { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; flex: 1; justify-content: flex-start; }
nav.top .links a.cta { margin-left: auto; }
nav.top .links a {
  color: var(--slate-700); font-weight: 500; font-size: 13.5px;
  padding: 7px 13px; border-radius: 5px;
  transition: all 0.12s ease;
}
nav.top .links a:hover { color: var(--slate-900); background: var(--slate-100); }
nav.top .links a.active { color: var(--amber-700); }
nav.top .links a.cta {
  background: var(--amber-500); color: var(--slate-900);
  font-weight: 700; padding: 7px 14px;
  margin-left: 8px;
}
nav.top .links a.cta:hover { background: var(--amber-400); color: var(--slate-900); }
nav.top .patent-pin {
  grid-column: 1 / span 2; grid-row: 2;
  justify-self: start; align-self: start;
  font-size: 7.5px; font-weight: 800; letter-spacing: 0.4px;
  background: var(--amber-500); color: var(--slate-900);
  padding: 0 4px; border-radius: 3px;
  line-height: 1.4;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ─── Nav dropdown (Pipeline mega-menu) ─── */
nav.top .nav-dd { position: relative; }
nav.top .nav-dd > a.dd-trigger {
  display: inline-flex; align-items: center; gap: 4px;
}
nav.top .nav-dd > a.dd-trigger .caret {
  font-size: 9px; color: var(--slate-400); transition: transform 0.15s ease;
}
nav.top .nav-dd:hover > a.dd-trigger .caret,
nav.top .nav-dd:focus-within > a.dd-trigger .caret { transform: rotate(180deg); color: var(--amber-600); }
nav.top .dd-menu {
  position: absolute; top: calc(100% + 6px); left: 50%;
  transform: translateX(-50%) translateY(-6px);
  background: #ffffff; border: 1px solid var(--slate-200);
  border-radius: 10px; box-shadow: 0 12px 32px rgba(15,23,42,0.12);
  padding: 18px 20px; min-width: 760px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
  z-index: 200;
}
nav.top .nav-dd:hover .dd-menu,
nav.top .nav-dd:focus-within .dd-menu {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
nav.top .dd-col .dd-title {
  font-size: 10px; font-weight: 800; letter-spacing: 1.4px;
  text-transform: uppercase; color: var(--amber-700);
  padding-bottom: 8px; margin-bottom: 6px;
  border-bottom: 1px solid var(--slate-200);
}
nav.top .dd-col a {
  display: block; font-size: 13px; color: var(--slate-700);
  padding: 5px 8px; border-radius: 4px; font-weight: 500;
  line-height: 1.35;
}
nav.top .dd-col a:hover { background: var(--slate-100); color: var(--amber-700); }
nav.top .dd-col a.dd-all {
  margin-top: 8px; font-weight: 700; color: var(--amber-700);
  border-top: 1px dashed var(--slate-200); padding-top: 10px;
}
@media (max-width: 980px) {
  nav.top .dd-menu {
    position: static; transform: none; min-width: 0;
    grid-template-columns: 1fr 1fr; box-shadow: none;
    border: none; padding: 8px 0 4px;
    opacity: 1; visibility: visible; pointer-events: auto;
    display: none;
  }
  nav.top .nav-dd.open .dd-menu { display: grid; }
}

/* ─── Hero (used on most landing pages) ─── */
.hero {
  background: #ffffff;
  color: var(--slate-900);
  padding: 32px 32px 24px;
  border-bottom: none;
  position: relative;
}
.hero::after {
  content: "";
  display: block;
  width: 100%;
  max-width: 1200px;
  height: 3px;
  background: var(--amber-500);
  border-radius: 2px;
  margin: 18px auto 0;
}
.hero .inner { max-width: 1200px; margin: 0 auto; }
.hero .eyebrow {
  display: inline-block;
  font-size: 11px; font-weight: 800; letter-spacing: 2px;
  color: var(--amber-700); text-transform: uppercase;
  margin-bottom: 8px;
}
.hero h1 {
  font-size: 34px; font-weight: 600; line-height: 1.12; letter-spacing: -1px;
  margin-bottom: 12px; max-width: 920px;
  color: var(--slate-900);
}
.hero .lede {
  font-size: 19px; color: var(--slate-700); font-weight: 400;
  max-width: 800px; line-height: 1.5;
}
.hero .lede strong { color: var(--slate-900); font-weight: 600; }
.hero .hero-claim {
  margin-top: 12px;
  font-size: 14px; font-weight: 600;
  color: #7c2d12; line-height: 1.45;
  padding: 9px 14px; background: #fffbeb;
  border-left: 3px solid var(--amber-600);
  border-radius: 0 6px 6px 0;
  max-width: 760px;
}
.hero .cta-row { margin-top: 18px; }
.hero .meta-strip {
  margin-top: 32px; display: flex; gap: 32px;
  font-size: 13px; color: var(--slate-600); flex-wrap: wrap;
}
.hero .meta-strip b { color: var(--amber-700); font-weight: 700; }
.hero .cta-row { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .cta-row a {
  display: inline-block; padding: 12px 22px; border-radius: 6px;
  font-weight: 700; font-size: 14px; transition: all 0.15s ease;
}
.hero .cta-row a.primary { background: var(--amber-500); color: var(--slate-900); }
.hero .cta-row a.primary:hover { background: var(--amber-400); }
.hero .cta-row a.secondary {
  background: transparent; color: var(--slate-900);
  border: 1px solid var(--slate-400);
}
.hero .cta-row a.secondary:hover { background: rgba(15,23,42,0.05); }

/* Smaller subpage hero variant */
.hero.compact { padding: 48px 32px 36px; }
.hero.compact h1 { font-size: 32px; }
.hero.compact .lede { font-size: 16px; }

/* ─── Main / sections ─── */
main { max-width: 1264px; margin: 0 auto; padding: 56px 32px; }
section { margin-bottom: 64px; }
section.full-bleed {
  max-width: none; margin: 0 -32px 64px;
  padding: 56px 32px;
}
section.alt { background: white; }

h2 { font-size: 28px; font-weight: 700; color: var(--slate-900); letter-spacing: -0.5px; margin-bottom: 12px; line-height: 1.2; }
h3 { font-size: 19px; font-weight: 700; color: var(--slate-900); margin: 22px 0 8px; }
h4 { font-size: 14px; font-weight: 700; color: var(--slate-800); margin: 16px 0 6px; }
p  { color: var(--slate-700); margin-bottom: 12px; font-size: 15px; }
p strong { color: var(--slate-900); font-weight: 600; }

.section-tag {
  display: inline-block; font-size: 11px; font-weight: 800; letter-spacing: 2.5px;
  color: var(--amber-600); text-transform: uppercase; margin-bottom: 8px;
}
.section-sub { color: var(--slate-500); font-size: 16px; max-width: 760px; margin-bottom: 28px; line-height: 1.55; }

/* ─── Pillar cards ─── */
.pillar-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.pillar {
  background: white; border-radius: 10px;
  padding: 28px 30px;
  border: 1px solid var(--slate-200);
  border-top: 4px solid var(--amber-500);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.pillar:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08); }
.pillar .pillar-tag { font-size: 11px; font-weight: 800; letter-spacing: 2px; color: var(--amber-600); text-transform: uppercase; margin-bottom: 6px; }
.pillar h3 { margin: 0 0 10px; font-size: 22px; }
.pillar p { font-size: 14.5px; color: var(--slate-700); line-height: 1.6; margin-bottom: 14px; }
.pillar .pillar-stats { display: flex; gap: 16px; flex-wrap: wrap; margin: 12px 0 14px; font-size: 12px; color: var(--slate-600); }
.pillar .pillar-stats b { color: var(--slate-900); font-weight: 700; font-variant-numeric: tabular-nums; }
.pillar .pillar-link { display: inline-block; color: var(--amber-600); font-weight: 700; font-size: 13.5px; }
.pillar .pillar-link:hover { color: var(--amber-700); }

/* ─── Capability cards ─── */
.cap-section-header {
  font-size: 11px; font-weight: 800; letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--amber-600); margin: 36px 0 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--slate-200);
}
.cap-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 16px; }
.cap-card {
  background: white; border-radius: 8px;
  padding: 20px 22px;
  border: 1px solid var(--slate-200);
  position: relative;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.cap-card:hover { border-color: var(--amber-500); box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08); }
.cap-card .cap-num {
  position: absolute; top: 16px; right: 18px;
  font-size: 11px; font-weight: 800;
  color: var(--slate-400); font-variant-numeric: tabular-nums;
}
.cap-card h4 { margin: 0 0 8px; font-size: 15px; padding-right: 32px; color: var(--slate-900); font-weight: 700; }
.cap-card p { margin: 0; font-size: 13.5px; color: var(--slate-600); line-height: 1.55; }
.cap-card .cap-proof {
  display: block; margin-top: 10px;
  font-size: 11.5px; font-weight: 700; color: var(--green-700);
  letter-spacing: 0.3px;
}

/* ─── Differentiator strip ─── */
.diff-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; }
.diff-item {
  background: white; border-left: 4px solid var(--amber-500);
  padding: 22px 24px; border-radius: 0 8px 8px 0;
  border-top: 1px solid var(--slate-200); border-right: 1px solid var(--slate-200); border-bottom: 1px solid var(--slate-200);
}
.diff-item h4 { font-size: 16px; color: var(--slate-900); margin-bottom: 8px; font-weight: 700; }
.diff-item p { font-size: 13.5px; color: var(--slate-700); line-height: 1.55; margin: 0; }
.diff-item p b { color: var(--slate-900); }

/* ─── Case study tiles ─── */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.case-tile {
  display: block; background: white; border-radius: 10px;
  padding: 24px 26px; border: 1px solid var(--slate-200);
  color: var(--slate-900); transition: all 0.15s ease;
  position: relative;
}
.case-tile:hover { border-color: var(--amber-500); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15,23,42,0.08); color: var(--slate-900); }
.case-tile .case-tag { font-size: 10px; font-weight: 800; letter-spacing: 1.6px; color: var(--amber-600); text-transform: uppercase; margin-bottom: 8px; }
.case-tile h3 { font-size: 18px; margin: 0 0 8px; }
.case-tile p { font-size: 13.5px; color: var(--slate-600); margin-bottom: 12px; line-height: 1.55; }
.case-tile .case-meta { display: flex; gap: 14px; font-size: 11.5px; color: var(--slate-500); flex-wrap: wrap; }
.case-tile .case-meta b { color: var(--slate-800); font-weight: 700; }
.case-tile .case-link { position: absolute; bottom: 22px; right: 24px; color: var(--amber-600); font-weight: 700; font-size: 18px; }
.case-tile .live-badge {
  display: inline-block; background: var(--green-100); color: var(--green-700);
  font-size: 10px; font-weight: 800; padding: 2px 7px; border-radius: 3px;
  letter-spacing: 0.4px; margin-left: 6px; text-transform: uppercase;
}
.case-tile .draft-badge {
  display: inline-block; background: var(--amber-100); color: var(--amber-700);
  font-size: 10px; font-weight: 800; padding: 2px 7px; border-radius: 3px;
  letter-spacing: 0.4px; margin-left: 6px; text-transform: uppercase;
}

/* ─── CTA / inquiry block ─── */
.cta-block {
  background: linear-gradient(135deg, var(--slate-900) 0%, var(--slate-800) 100%);
  color: white; border-radius: 12px;
  padding: 40px 44px; text-align: center;
  margin: 56px 0; border: 1px solid var(--slate-700);
}
.cta-block h2 { color: white; margin-bottom: 10px; font-size: 26px; }
.cta-block p { color: var(--slate-300); max-width: 640px; margin: 0 auto 22px; font-size: 15px; }
.cta-block a.button {
  display: inline-block; background: var(--amber-500); color: var(--slate-900);
  padding: 13px 28px; border-radius: 6px; font-weight: 700; font-size: 14.5px;
  letter-spacing: 0.2px;
}
.cta-block a.button:hover { background: var(--amber-400); color: var(--slate-900); }

/* ─── Footer ─── */
footer.site-footer {
  background: var(--slate-950); color: var(--slate-400);
  padding: 48px 32px 24px;
  margin-top: 64px;
}
footer.site-footer .inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px;
}
footer.site-footer .brand-col { font-size: 14px; }
footer.site-footer .brand-col .brand-name {
  font-size: 18px; font-weight: 700; color: white; margin-bottom: 8px;
  display: flex; align-items: center; gap: 10px;
}
footer.site-footer .brand-col .brand-name span { color: var(--amber-400); font-weight: 800; }
footer.site-footer .brand-col p { color: var(--slate-400); font-size: 13px; line-height: 1.6; max-width: 360px; margin-bottom: 10px; }
footer.site-footer .col h4 {
  font-size: 11px; font-weight: 800; color: white;
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 14px;
}
footer.site-footer .col a {
  display: block; color: var(--slate-400); font-size: 13px;
  padding: 4px 0;
}
footer.site-footer .col a:hover { color: var(--amber-400); }
footer.site-footer .legal {
  grid-column: 1 / -1; padding-top: 22px; margin-top: 22px;
  border-top: 1px solid var(--slate-800); font-size: 11.5px; color: var(--slate-500);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
footer.site-footer .legal a { color: var(--slate-500); }
footer.site-footer .legal a:hover { color: var(--amber-400); }
footer.site-footer .patent-line { color: var(--amber-400); font-weight: 600; }

/* ─── Utilities ─── */
.badge {
  display: inline-block; font-size: 10.5px; font-weight: 800;
  background: var(--amber-100); color: var(--amber-700);
  padding: 3px 8px; border-radius: 3px;
  letter-spacing: 0.4px; text-transform: uppercase;
}
.kbd-route {
  font-family: "SF Mono", "Consolas", monospace; font-size: 12px;
  background: var(--slate-900); color: var(--amber-400);
  padding: 2px 7px; border-radius: 3px; font-weight: 600;
}
.divider { height: 1px; background: var(--slate-200); margin: 32px 0; }
.callout {
  background: var(--amber-50); border-left: 4px solid var(--amber-500);
  padding: 14px 18px; border-radius: 0 6px 6px 0;
  font-size: 14px; color: var(--slate-700); margin: 16px 0;
}
.callout strong { color: var(--amber-700); }

/* Toc (sub-page sidebar) */
.layout-toc { display: grid; grid-template-columns: 240px 1fr; gap: 48px; }
.toc { position: sticky; top: 88px; align-self: start; }
.toc h4 { font-size: 11px; font-weight: 800; color: var(--slate-500); letter-spacing: 1.4px; text-transform: uppercase; margin-bottom: 14px; }
.toc a { display: block; padding: 7px 14px; color: var(--slate-600); border-left: 2px solid transparent; font-size: 13px; font-weight: 600; }
.toc a:hover { color: var(--amber-700); border-left-color: var(--amber-300); background: var(--amber-50); }
.toc a.active { color: var(--amber-700); border-left-color: var(--amber-500); background: var(--amber-50); }

/* Validation/data tables */
.data-table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 13px; background: white; border-radius: 6px; overflow: hidden; }
.data-table th { background: var(--slate-100); padding: 9px 12px; font-weight: 700; color: var(--slate-900); text-align: left; font-size: 12px; }
.data-table td { padding: 8px 12px; border-bottom: 1px solid var(--slate-200); color: var(--slate-700); }
.data-table tbody tr:nth-child(even) { background: var(--slate-50); }
.data-table tbody tr:hover { background: var(--amber-50); }
.data-table b { color: var(--slate-900); }

@media (max-width: 920px) {
  .pillar-grid, .case-grid, .diff-strip { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  .hero .lede { font-size: 16px; }
  footer.site-footer .inner { grid-template-columns: 1fr 1fr; }
  nav.top .inner { flex-wrap: wrap; padding: 12px 18px; }
  main { padding: 32px 20px; }
  .hero { padding: 44px 20px 32px; }
  .layout-toc { grid-template-columns: 1fr; }
  .toc { position: static; }
}