/* ─── Svas marketing site styles ──────────────────────────────────────────
   Editorial serif + sans-serif body, cream background, black contrast
   bands, orange-red accent for emphasis. Mirrors the Subquadratic editorial
   feel adapted to a family health product. */

:root {
  --bg: #FAFBFF;
  --bg-dark: #0A0A0A;
  --text: #1D1E20;
  --text-muted: #6B6B6B;
  --text-on-dark: #FAFBFF;
  --muted-on-dark: #9A9A9A;
  --accent: #E84B1C;
  --border: #E5E5E5;
  --border-dark: #1F1F1F;
  --max: 1110px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Editorial serif for display headlines ────────────────────────── */
.serif, h1, h2.serif, h3.serif {
  font-family: 'Source Serif 4', 'Source Serif Pro', Georgia, 'Times New Roman', serif;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1 { font-size: 56px; line-height: 1.05; }
h2 { font-size: 40px; line-height: 1.1; font-family: 'Source Serif 4', Georgia, serif; font-weight: 600; }
h3 { font-size: 22px; line-height: 1.3; font-weight: 600; }

p { font-size: 16px; line-height: 1.6; color: var(--text); }

/* ─── Container + section spacing ──────────────────────────────────── */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 32px;
}

section {
  padding: 96px 0;
}

section.tight { padding: 64px 0; }

/* ─── Nav ─────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid transparent;
  padding: 20px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.brand-mark {
  width: 24px;
  height: 24px;
  background: var(--accent);
  border-radius: 6px;
  display: inline-block;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin-left: 32px;
  flex: 1;
}

.nav-links a {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.nav-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link-secondary {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

/* ─── Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: opacity 0.15s, background 0.15s;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-primary:hover { opacity: 0.85; text-decoration: none; }

.btn-primary.on-dark {
  background: var(--bg);
  color: var(--text);
}

/* ─── Hero ─────────────────────────────────────────────────────────── */
.hero {
  padding: 80px 0 64px;
}

.hero h1 {
  max-width: 720px;
  margin-bottom: 24px;
}

.hero-body {
  max-width: 580px;
  font-size: 17px;
  color: var(--text);
  margin-bottom: 32px;
}

.accent { color: var(--accent); }

/* ─── Hero media (replaces video) ────────────────────────────────── */
.hero-media {
  margin-top: 16px;
  background: linear-gradient(135deg, #0A0A0A 0%, #1a1a1a 100%);
  height: 360px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted-on-dark);
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

.hero-media::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(232,75,28,0.15), transparent 60%);
}

.hero-media-label {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-media-label strong {
  display: block;
  color: var(--bg);
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 28px;
  margin-bottom: 8px;
  font-weight: 500;
}

/* ─── Stats band (dark) ────────────────────────────────────────────── */
.band-dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  padding: 64px 0;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  font-weight: 500;
}

.stat-value {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 48px;
  font-weight: 500;
  line-height: 1;
  color: var(--text-on-dark);
  margin-bottom: 8px;
}

.stat-caption {
  font-size: 13px;
  color: var(--muted-on-dark);
}

/* ─── Feature blocks ──────────────────────────────────────────────── */
.section-eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 500;
}

.section-eyebrow.on-dark { color: var(--accent); }

.feature h2 { max-width: 700px; margin-bottom: 16px; }
.feature .lead { max-width: 580px; font-size: 17px; margin-bottom: 48px; }

.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 32px;
}

/* ─── Architectural block (black) ──────────────────────────────────── */
.architectural {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  margin: 48px 0;
  padding: 80px 0;
}

.architectural .wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.architectural h2 {
  color: var(--text-on-dark);
  margin-bottom: 24px;
}

.architectural .accent-line {
  color: var(--accent);
  display: block;
}

.architectural p {
  color: var(--muted-on-dark);
  max-width: 480px;
  margin-bottom: 16px;
}

.architectural .label {
  margin-top: 32px;
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--muted-on-dark);
  text-transform: uppercase;
}

/* ─── Diagram (decorative) ────────────────────────────────────────── */
.network-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 280px;
  position: relative;
}

.network-diagram svg { width: 280px; height: 280px; }

/* ─── Two cards row ───────────────────────────────────────────────── */
.two-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 48px;
}

.two-cards > div {
  padding: 40px;
}

.two-cards .card-light {
  background: #EFEAFF;
}

.two-cards .card-dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}

.two-cards .card-eyebrow {
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 500;
  margin-bottom: 24px;
  opacity: 0.6;
}

.two-cards h3 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 28px;
  margin-bottom: 24px;
  font-weight: 600;
}

.two-cards .card-dark h3 { color: var(--text-on-dark); }

.two-cards p { font-size: 14px; margin-bottom: 16px; line-height: 1.55; }
.two-cards .card-dark p { color: var(--muted-on-dark); }

.two-cards ul {
  list-style: none;
  margin: 0 0 24px;
}

.two-cards li {
  font-size: 13px;
  padding: 8px 0;
  border-top: 1px solid rgba(0,0,0,0.08);
}

.two-cards .card-dark li { border-top-color: var(--border-dark); color: var(--muted-on-dark); }

/* ─── "From the lab" cards ────────────────────────────────────────── */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.lab-card {
  display: flex;
  flex-direction: column;
}

.lab-card .img {
  height: 160px;
  background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
  border-radius: 4px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 32px;
}

.lab-card .tag {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.lab-card .date {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: 8px;
}

.lab-card h4 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.3;
}

.lab-card .read-more {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
}

/* ─── About band ──────────────────────────────────────────────────── */
.about {
  background: var(--bg-dark);
  color: var(--text-on-dark);
  padding: 96px 0;
  text-align: center;
}

.about .mark {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 6px;
  margin: 0 auto 32px;
}

.about h2 {
  color: var(--text-on-dark);
  max-width: 760px;
  margin: 0 auto 24px;
  font-size: 32px;
}

.about p {
  color: var(--muted-on-dark);
  max-width: 580px;
  margin: 0 auto;
}

.partners {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 64px;
  flex-wrap: wrap;
  padding-top: 32px;
  border-top: 1px solid var(--border-dark);
  font-size: 13px;
  color: var(--muted-on-dark);
}

.partners-label {
  display: block;
  text-align: center;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted-on-dark);
  margin-top: 48px;
  margin-bottom: 24px;
}

/* ─── Final CTA ───────────────────────────────────────────────────── */
.final-cta {
  padding: 96px 0;
}

.final-cta .wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.final-cta h2 { margin-bottom: 16px; }

.cta-form-card {
  background: var(--bg-dark);
  border-radius: 4px;
  padding: 32px;
  color: var(--text-on-dark);
  position: relative;
}

.cta-form-card::before {
  content: '';
  position: absolute;
  top: -6px;
  right: -6px;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 2px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.cta-form-card input,
.cta-form-card textarea {
  background: transparent;
  border: 1px solid var(--border-dark);
  border-radius: 4px;
  padding: 12px 14px;
  color: var(--text-on-dark);
  font-family: inherit;
  font-size: 14px;
  width: 100%;
}

.cta-form-card input::placeholder,
.cta-form-card textarea::placeholder {
  color: var(--muted-on-dark);
}

.cta-form-card .btn {
  background: var(--accent);
  color: var(--bg);
  width: 100%;
  margin-top: 8px;
  padding: 14px;
}

.cta-fine-print {
  font-size: 11px;
  color: var(--muted-on-dark);
  margin-top: 16px;
}

/* ─── Footer ──────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 48px;
  color: var(--text-muted);
  font-size: 13px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h5 {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col ul { list-style: none; }
.footer-col li { padding: 4px 0; }
.footer-col a { color: var(--text-muted); font-size: 13px; }
.footer-col a:hover { color: var(--text); }

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

/* ─── Legal page layout (privacy, terms, etc.) ───────────────────── */
.legal {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 32px 96px;
}

.legal .eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-weight: 500;
}

.legal h1 {
  font-size: 44px;
  margin-bottom: 12px;
  line-height: 1.1;
}

.legal .effective {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 48px;
}

.legal h2 {
  font-size: 24px;
  margin-top: 48px;
  margin-bottom: 16px;
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 600;
}

.legal h3 {
  font-size: 17px;
  margin-top: 32px;
  margin-bottom: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

.legal p, .legal li {
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 12px;
  color: var(--text);
}

.legal ul, .legal ol { margin-left: 24px; margin-bottom: 16px; }

.legal strong { font-weight: 600; }

.legal .callout {
  background: #fff;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 16px 20px;
  border-radius: 4px;
  margin: 24px 0;
}

.legal .callout p { margin: 0; font-size: 14px; }

/* Table-of-contents on legal pages */
.toc {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  margin-bottom: 48px;
}

.toc h5 {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 500;
}

.toc ol {
  list-style: decimal;
  margin-left: 20px;
}

.toc li { padding: 3px 0; font-size: 14px; }

.toc a { color: var(--text); }
.toc a:hover { color: var(--accent); }

/* ─── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 800px) {
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  section { padding: 64px 0; }
  .wrap { padding: 0 24px; }
  .nav-links { display: none; }
  .architectural .wrap,
  .final-cta .wrap { grid-template-columns: 1fr; gap: 32px; }
  .two-cards { grid-template-columns: 1fr; }
  .cards-3 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 40px; }
  .legal h1 { font-size: 32px; }
}