/* Verdatum website styles.
   Tokens mirror the Verdatum design system synced at
   design/verdatum-landing-page/ (colors.css, typography.css, spacing.css,
   effects.css). Fonts are self-hosted: see static/fonts/fonts.css. */

:root {
  /* Brand navy ramp */
  --navy-950: #171d2e;
  --navy-900: #1b2338;
  --navy-800: #232d49;
  --navy-700: #334067;
  --navy-600: #3f4f7d;
  --navy-500: #586ba4;
  --navy-400: #7b8bbb;
  --navy-300: #a3aed2;
  --navy-200: #cbd2e6;
  --navy-100: #e6eaf3;
  --navy-50:  #f3f5fa;

  /* Warm accents */
  --yellow-600: #eecb5f;
  --yellow-100: #fcf5db;
  --orange-600: #ef7a45;
  --coral-600: #ef4f3f;
  --green-500: oklch(0.62 0.09 165);

  /* Neutrals */
  --ink-900: #1b2338;
  --ink-700: #3b445c;
  --gray-500: #7c8298;
  --gray-400: #a1a7b8;
  --gray-300: #c7ccd8;
  --gray-200: #e2e5ec;
  --gray-100: #f2f4f8;
  --gray-50:  #f8f9fc;
  --white:    #ffffff;

  /* Semantic */
  --border-subtle: var(--gray-200);
  --border-default: var(--gray-300);
  --text-link: var(--navy-500);
  --text-link-hover: var(--navy-700);

  /* Type */
  --font-wordmark: 'Montserrat', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans: 'Source Sans 3', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --tracking-caps: 0.12em;

  /* Shape and elevation */
  --radius-sm: 5px;
  --radius-md: 8px;
  --radius-pill: 999px;
}

/* Base */

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink-700);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
}

html { scroll-behavior: smooth; }

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

/* Shared pieces */

.wordmark {
  font-family: var(--font-wordmark);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--navy-700);
  text-decoration: none;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: var(--tracking-caps);
  color: var(--gray-500);
}

.kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  color: var(--gray-500);
  margin-bottom: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 17px;
  text-decoration: none;
}

.btn-light { background: var(--white); color: var(--navy-700); }
.btn-light:hover { background: var(--navy-100); color: var(--navy-800); }

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--navy-500);
}
.btn-outline:hover { background: var(--navy-800); color: var(--white); }

.btn-navy { background: var(--navy-700); color: var(--white); }
.btn-navy:hover { background: var(--navy-800); color: var(--white); }

.btn-sm { min-height: 40px; padding: 8px 20px; font-size: 15px; }

/* Nav */

.nav {
  padding: 18px 56px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--white);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-brand { display: flex; align-items: baseline; gap: 14px; }
.nav-brand .wordmark { font-size: 22px; }
.nav-brand .eyebrow { font-size: 11px; letter-spacing: 0.08em; }

.nav-links { display: flex; align-items: center; gap: 28px; }

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-700);
  text-decoration: none;
}
.nav-link:hover { color: var(--navy-700); }

/* Hero */

.hero {
  background: var(--navy-700);
  color: var(--white);
  padding: 104px 56px 96px;
  text-align: center;
}

.hero-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  color: var(--navy-300);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 64px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.hero-sub {
  margin: 0;
  max-width: 660px;
  font-size: 19px;
  color: var(--navy-200);
}

.hero-ctas {
  display: flex;
  gap: 14px;
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-platforms {
  display: flex;
  align-items: center;
  gap: 14px 26px;
  margin-top: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.hero-platforms .eyebrow { color: var(--navy-400); }
.platform-primary { font-weight: 700; font-size: 19px; color: var(--white); letter-spacing: 0.01em; }
.platform { font-weight: 600; font-size: 17px; color: var(--navy-200); letter-spacing: 0.01em; }
.platform-divider { width: 1px; height: 18px; background: var(--navy-500); }

/* Coverage marquee */

.marquee-band {
  background: var(--white);
  border-bottom: 1px solid var(--border-subtle);
  padding: 34px 0 38px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.marquee-band .eyebrow { text-align: center; padding: 0 24px; line-height: 1.7; }

.marquee-mask {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.marquee {
  display: flex;
  align-items: center;
  gap: 88px;
  width: max-content;
  padding-left: 88px;
  animation: vd-marquee 30s linear infinite;
}

.marquee span {
  flex: none;
  font-weight: 700;
  font-size: 21px;
  color: var(--gray-400);
  letter-spacing: 0.03em;
}

@keyframes vd-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .marquee { animation: none; }
  html { scroll-behavior: auto; }
}

/* Sections */

.section { padding: 88px 56px; background: var(--white); }
.section-alt { background: var(--gray-50); border-top: 1px solid var(--border-subtle); }
.section-bordered { border-top: 1px solid var(--border-subtle); }
.section-inner { max-width: 1040px; margin: 0 auto; }

.section-title {
  margin: 0 0 48px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 38px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

/* How it works */

.step {
  display: grid;
  grid-template-columns: 120px 320px 1fr;
  gap: 32px;
  align-items: baseline;
  padding: 26px 0;
  border-top: 1px solid var(--border-subtle);
}

.step:last-child { border-bottom: 1px solid var(--border-subtle); }

.step-no { font-family: var(--font-mono); font-size: 14px; font-weight: 600; color: var(--navy-500); }
.step-name { font-family: var(--font-display); font-weight: 600; font-size: 22px; color: var(--ink-900); }
.step p { margin: 0; }

/* Cards */

.cards-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.cards-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }

.card {
  background: var(--white);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  color: var(--ink-900);
}

.card p { margin: 0; line-height: 1.6; }

.card-refs { font-family: var(--font-mono); font-size: 12.5px; color: var(--gray-500); }

.card-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 48px;
  align-items: start;
}

.card-wide-copy { display: flex; flex-direction: column; gap: 12px; }

.tags { display: flex; flex-wrap: wrap; gap: 10px; align-content: start; padding-top: 6px; }

.tag {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-700);
  background: var(--gray-100);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}

.tag-muted {
  color: var(--gray-500);
  background: var(--gray-50);
  border: 1px dashed var(--border-default);
}

/* Data provenance */

.compliance-inner { display: flex; flex-direction: column; gap: 88px; }

.provenance { display: flex; flex-direction: column; gap: 56px; }
.provenance-lead { display: flex; flex-direction: column; gap: 18px; max-width: 620px; }
.provenance-lead .kicker { margin-bottom: 0; }
.provenance-lead .section-title { margin: 0; }
.provenance-lead p { margin: 0; font-size: 17px; }

.points { display: grid; grid-template-columns: 1fr 1fr; gap: 40px 64px; }

.point {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.point-head { display: flex; gap: 14px; align-items: baseline; }
.point-no { font-family: var(--font-mono); font-size: 13px; font-weight: 600; color: var(--navy-500); flex: none; }
.point-name { font-weight: 600; font-size: 17px; color: var(--ink-900); }
.point p { margin: 0; }

.tier-block { display: flex; flex-direction: column; gap: 28px; }

.tiers { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }

.tier { display: flex; flex-direction: column; gap: 10px; border-top: 3px solid; padding-top: 16px; }
.tier-registry { border-color: var(--green-500); }
.tier-provider { border-color: var(--yellow-600); }
.tier-web { border-color: var(--coral-600); }

.tier-head { display: flex; align-items: center; gap: 10px; }
.tier-name { font-weight: 600; font-size: 17px; color: var(--ink-900); }
.tier p { margin: 0; font-size: 15px; line-height: 1.6; }

.dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.dot-registry { background: var(--green-500); }
.dot-provider { background: var(--yellow-600); }
.dot-web { background: var(--coral-600); }

/* Worked example claim */

.claim-card {
  background: var(--gray-50);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--green-500);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 26px 30px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.claim-quote {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--ink-900);
}

.claim-meta {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

.meta-pair { display: flex; align-items: baseline; gap: 8px; }

.meta-label {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gray-500);
}

.meta-value { font-family: var(--font-mono); font-size: 13px; color: var(--ink-700); }

.meta-authority {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-900);
}

.meta-authority .dot { width: 7px; height: 7px; }

.limitation {
  display: flex;
  gap: 12px;
  align-items: baseline;
  background: var(--yellow-100);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.limitation-label {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-700);
  flex: none;
}

.limitation-text { font-size: 14.5px; line-height: 1.55; }

/* Use cases */

.use-case { padding: 26px 28px; }
.use-case .card-title { font-size: 21px; }
.use-case p { font-size: 15px; flex: 1; }

.use-case .card-refs {
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

/* CTA band */

.cta-band {
  background: var(--navy-700);
  padding: 72px 56px;
  text-align: center;
}

.cta-inner {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.cta-inner h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 34px;
  letter-spacing: -0.01em;
  color: var(--white);
}

.cta-inner p { margin: 0; font-size: 17px; color: var(--navy-200); }

/* Footer */

.footer {
  background: var(--navy-900);
  padding: 36px 56px;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-brand .wordmark { font-size: 17px; color: var(--white); }
.footer-operator { font-size: 13px; color: var(--navy-300); }

.footer-links { display: flex; align-items: center; gap: 12px 20px; flex-wrap: wrap; }
.footer-links a { font-size: 13px; color: var(--navy-300); text-decoration: none; }
.footer-links a:hover { color: var(--white); text-decoration: underline; }
.footer-mail { font-family: var(--font-mono); font-size: 12.5px; }

/* Document pages (privacy policy, support) */

.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 88px;
}

.doc h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 38px;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink-900);
  margin: 0 0 8px;
}

.doc h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 25px;
  color: var(--ink-900);
  margin: 44px 0 12px;
}

.doc h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  color: var(--ink-900);
  margin: 32px 0 8px;
}

.doc p, .doc li { font-size: 16px; }

.doc table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 15px;
}

.doc th {
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--gray-500);
  border-bottom: 1px solid var(--border-default);
  padding: 8px 16px 8px 0;
}

.doc td {
  vertical-align: top;
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 16px 10px 0;
  line-height: 1.55;
}

.doc code { font-family: var(--font-mono); font-size: 0.9em; }

/* Responsive — breakpoints mirror the design's data-r rules */

@media (max-width: 1024px) {
  .hero h1 { font-size: 52px; }
  .cards-3 { grid-template-columns: 1fr 1fr; }
  .step { grid-template-columns: 80px 200px 1fr; }
}

@media (max-width: 900px) {
  /* Section anchors hide on small screens; the nav CTA and the doc
     pages' /privacy and /support links stay. */
  .nav-link[href^="#"] { display: none; }
}

@media (max-width: 680px) {
  .nav, .footer { padding-left: 24px; padding-right: 24px; }
  /* The wordmark alone carries the brand; the descriptor wraps badly here. */
  .nav-brand .eyebrow { display: none; }
  .section { padding: 56px 24px; }
  .hero { padding: 64px 24px 56px; }
  .cta-band { padding: 56px 24px; }
  .hero h1 { font-size: 38px; }
  .section-title { font-size: 29px; }
  .cta-inner h2 { font-size: 28px; }
  .cards-2, .cards-3, .tiers, .points, .card-wide { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; gap: 10px; }
}