/* Certified Email — marketing site stylesheet
   Design language: registered/notarial documents, not SaaS dashboard.
   Deep ink navy + warm parchment text + muted brass seal accent +
   oxblood as a secondary/status accent. Serif display (Fraunces) for
   gravitas, Inter for body, IBM Plex Mono for evidence data (cert IDs,
   hashes) — echoing how the actual certificates render technical data.
*/

:root {
  --ink: #ffffff;
  --ink-panel: #f4f6fa;
  --ink-panel-2: #eaeef5;
  --hairline: #dde3ee;
  --parchment: #0f1e38;
  --parchment-dim: #5b6478;
  --brass: #1e4d8c;
  --brass-bright: #2f6fc4;
  --oxblood: #8a3b3f;
  --good: #4c8a49;

  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "Consolas", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--ink);
  color: var(--parchment);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- Typography ---------- */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--parchment);
}

h1 { font-size: clamp(2.4rem, 4.4vw, 3.6rem); line-height: 1.08; }
h2 { font-size: clamp(1.7rem, 2.6vw, 2.3rem); line-height: 1.18; margin-bottom: 14px; }
h3 { font-size: 1.15rem; line-height: 1.3; margin-bottom: 8px; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
  display: inline-block;
  margin-bottom: 18px;
}

p { color: var(--parchment-dim); }

.lede { font-size: 1.15rem; color: var(--parchment-dim); max-width: 46ch; }

.mono { font-family: var(--mono); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: 3px;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary { background: var(--brass); color: #ffffff; }
.btn-primary:hover { background: var(--brass-bright); }

.btn-ghost { border-color: var(--hairline); color: var(--parchment); background: transparent; }
.btn-ghost:hover { border-color: var(--brass); }

/* ---------- Nav ---------- */

header.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(28, 61, 107, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
header.site-nav .brand,
header.site-nav .nav-links a,
header.site-nav .lang-switch a,
header.site-nav .nav-cta .btn-ghost,
header.site-nav .nav-toggle {
  color: #e8edf5;
}
header.site-nav .nav-links a:hover { color: #9dc4f5; }
header.site-nav .lang-switch a.active { color: #9dc4f5; border-color: #9dc4f5; }
header.site-nav .nav-cta .btn-ghost { border-color: rgba(255,255,255,0.35); }
header.site-nav .nav-cta .btn-ghost:hover { border-color: #9dc4f5; color: #9dc4f5; }
.nav-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 16px 28px;
  max-width: 1160px;
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--parchment);
  margin-right: auto;
}
.brand .seal-mini { width: 26px; height: 26px; }
.brand-logo { height: 85px; width: auto; display: block; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a {
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--parchment-dim);
  transition: color 0.15s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--brass); }
.lang-switch { display: flex; gap: 4px; font-family: var(--mono); font-size: 0.75rem; }
.lang-switch a {
  padding: 3px 6px;
  border-radius: 2px;
  color: var(--parchment-dim);
  text-decoration: none;
}
.lang-switch a.active { color: var(--brass); border: 1px solid var(--brass); }
.nav-cta { display: flex; gap: 10px; align-items: center; }
.nav-cta .btn { padding: 9px 18px; font-size: 0.85rem; }
.nav-toggle { display: none; background: none; border: none; color: var(--parchment); font-size: 1.4rem; cursor: pointer; padding: 4px 8px; }

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px 28px 20px;
  border-top: 1px solid var(--hairline);
  background: var(--ink);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
  color: var(--parchment-dim);
  text-decoration: none;
  font-size: 0.95rem;
}
.mobile-menu a:last-of-type { border-bottom: none; }
.mobile-menu .mobile-lang { display: flex; gap: 10px; padding: 12px 0; font-family: var(--mono); font-size: 0.8rem; }
.mobile-menu .mobile-lang a { padding: 4px 8px; border: 1px solid var(--hairline); border-radius: 3px; border-bottom: 1px solid var(--hairline); }
.mobile-menu .mobile-lang a.active { border-color: var(--brass); color: var(--brass); }
.mobile-menu .btn { margin-top: 8px; text-align: center; justify-content: center; }

@media (max-width: 980px) {
  .nav-links { display: none; }
  .lang-switch { display: none; }
  .nav-toggle { display: block; }
  .nav-cta { gap: 8px; }
  .nav-cta .btn { padding: 8px 14px; font-size: 0.82rem; }
}

/* ---------- Hero ---------- */

.hero {
  padding: 88px 0 100px;
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(ellipse 900px 500px at 85% -10%, rgba(30,77,140,0.09), transparent 60%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-cta-row { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 0.82rem; color: var(--parchment-dim); font-family: var(--mono); }

/* Certificate specimen card */
.cert-card {
  background: var(--ink-panel);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 30px 28px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 70px -30px rgba(0,0,0,0.6);
  opacity: 0;
  transform: scale(0.96) rotate(-1.2deg);
  animation: stamp-down 0.7s cubic-bezier(.2,.8,.2,1) 0.15s forwards;
}
@keyframes stamp-down {
  0% { opacity: 0; transform: scale(0.9) rotate(-2deg); }
  60% { opacity: 1; transform: scale(1.02) rotate(0.3deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}
.cert-card-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 22px; }
.cert-id-label { font-family: var(--mono); font-size: 0.68rem; color: var(--parchment-dim); letter-spacing: 0.08em; text-transform: uppercase; }
.cert-id-value { font-family: var(--mono); font-size: 1.05rem; color: var(--brass-bright); margin-top: 4px; }
.cert-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--hairline); font-size: 0.85rem; }
.cert-row:last-of-type { border-bottom: none; }
.cert-row span:first-child { color: var(--parchment-dim); }
.cert-row span:last-child { font-family: var(--mono); font-size: 0.78rem; text-align: right; }
.cert-hash { word-break: break-all; }
.cert-seal-overlay { position: absolute; right: -18px; bottom: -18px; width: 150px; height: 150px; opacity: 0.9; }

/* ---------- Sections generic ---------- */

section { padding: 92px 0; }
section.alt { background: var(--ink-panel); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.section-head { max-width: 640px; margin-bottom: 52px; }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* How it works */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.step { border-top: 2px solid var(--brass); padding-top: 18px; }
.step-tag { font-family: var(--mono); font-size: 0.72rem; color: var(--brass); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 10px; display: block; }

/* Feature trio */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--hairline); border: 1px solid var(--hairline); border-radius: 4px; overflow: hidden; }
.feature { background: var(--ink); padding: 32px 28px; }
.feature .tag { font-family: var(--mono); font-size: 0.68rem; color: var(--oxblood); letter-spacing: 0.08em; text-transform: uppercase; display: inline-block; margin-bottom: 14px; padding: 2px 8px; border: 1px solid var(--oxblood); border-radius: 2px; }

/* Two-product chooser */
.product-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.product-card { background: var(--ink-panel); border: 1px solid var(--hairline); border-radius: 4px; padding: 34px 30px; }
.product-glyph {
  width: 44px; height: 44px; border: 1.5px solid var(--brass); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 1.2rem; color: var(--brass-bright); margin-bottom: 18px;
}
.product-card p { margin-bottom: 16px; }

/* Use cases */
.usecases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.usecase { background: var(--ink-panel); border: 1px solid var(--hairline); border-radius: 4px; padding: 24px; }
.usecase .glyph { font-family: var(--serif); font-size: 1.6rem; color: var(--brass); margin-bottom: 10px; }

/* Security */
.security-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.security-list { list-style: none; }
.security-list li { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--hairline); font-size: 0.92rem; color: var(--parchment-dim); }
.security-list li:last-child { border-bottom: none; }
.security-list .chk { color: var(--good); font-family: var(--mono); flex-shrink: 0; }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.price-card { background: var(--ink-panel); border: 1px solid var(--hairline); border-radius: 4px; padding: 30px 26px; display: flex; flex-direction: column; }
.price-card.featured { border-color: var(--brass); position: relative; }
.price-card.featured::before {
  content: attr(data-badge);
  position: absolute; top: -12px; left: 26px;
  background: var(--brass); color: #ffffff; font-family: var(--mono);
  font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 2px;
}
.price-amount { font-family: var(--serif); font-size: 2.2rem; color: var(--parchment); margin: 14px 0 4px; }
.price-amount span { font-family: var(--sans); font-size: 0.95rem; color: var(--parchment-dim); }
.price-list { list-style: none; margin: 18px 0 24px; flex-grow: 1; }
.price-list li { font-size: 0.88rem; color: var(--parchment-dim); padding: 6px 0; }
.price-list li::before { content: "—"; color: var(--brass); margin-right: 8px; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--hairline); }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; color: var(--parchment);
  font-family: var(--sans); font-size: 1.02rem; font-weight: 600; padding: 20px 0; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.faq-q .plus { font-family: var(--mono); color: var(--brass); transition: transform 0.2s ease; }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a p { padding-bottom: 20px; font-size: 0.94rem; }
.faq-item.open .faq-a { max-height: 6000px; }

/* Final CTA */
.cta-band {
  text-align: center;
  padding: 90px 0;
  background: radial-gradient(ellipse 800px 400px at 50% 0%, rgba(30,77,140,0.1), transparent 65%);
}
.cta-band h2 { margin-bottom: 16px; }
.cta-band p { max-width: 46ch; margin: 0 auto 30px; }

/* Footer */
footer { border-top: 1px solid var(--hairline); padding: 56px 0 34px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
.footer-col h4 { font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--parchment-dim); margin-bottom: 14px; }
.footer-col a { display: block; font-size: 0.88rem; color: var(--parchment-dim); text-decoration: none; padding: 5px 0; }
.footer-col a:hover { color: var(--brass); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid var(--hairline); font-size: 0.8rem; color: var(--parchment-dim); flex-wrap: wrap; gap: 12px; }

/* Mobile */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .steps, .features, .usecases, .pricing-grid, .product-grid { grid-template-columns: 1fr; }
  .security-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .nav-inner { gap: 12px; padding: 14px 20px; }
  .brand-logo { height: 65px; }
  .nav-cta { gap: 6px; }
  .nav-cta .btn { padding: 7px 11px; font-size: 0.76rem; }
}

@media (prefers-reduced-motion: reduce) {
  .cert-card { animation: none; opacity: 1; transform: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Legal documents ---------- */
.legal-hero { padding: 64px 0 0; }
.legal-content { max-width: 760px; }
.legal-updated { font-family: var(--mono); font-size: 0.78rem; color: var(--parchment-dim); margin-top: 10px; }
.legal-toc {
  display: flex; flex-wrap: wrap; gap: 8px 22px;
  margin: 40px 0 0; padding: 20px 24px;
  background: var(--ink-panel); border: 1px solid var(--hairline); border-radius: 4px;
}
.legal-toc a { font-family: var(--mono); font-size: 0.76rem; color: var(--parchment-dim); text-decoration: none; letter-spacing: 0.02em; }
.legal-toc a:hover { color: var(--brass); }
.legal-body { padding-top: 20px; }
.legal-body h2 { font-size: 1.35rem; margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--hairline); }
.legal-body > h2:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }
.legal-body h3 { color: var(--brass-bright); font-size: 1rem; margin-top: 26px; margin-bottom: 8px; }
.legal-body p { margin-bottom: 14px; }
.legal-body ul, .legal-body ol { padding-left: 22px; margin: 0 0 18px; color: var(--parchment-dim); }
.legal-body li { margin-bottom: 8px; }
.legal-body a { color: var(--brass-bright); text-underline-offset: 3px; }
.legal-body strong { color: var(--parchment); }
.table-scroll { overflow-x: auto; margin: 8px 0 26px; }
.table-scroll table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 0.85rem; }
.table-scroll th, .table-scroll td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--hairline); vertical-align: top; color: var(--parchment-dim); }
.table-scroll th { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--brass); font-weight: 600; white-space: nowrap; }
.table-scroll td:first-child { font-family: var(--mono); font-size: 0.8rem; color: var(--parchment); white-space: nowrap; }

:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }