:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #172033;
  --muted: #667085;
  --line: #e4e7ec;
  --brand: #1f57d6;
  --brand-soft: #eef4ff;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
}
.brand { font-weight: 800; letter-spacing: -.02em; }
nav { display: flex; gap: 24px; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--text); }
.hero, .section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 96px 28px;
}
.hero { padding-top: 120px; padding-bottom: 120px; }
.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--brand);
}
h1 {
  max-width: 860px;
  margin: 0;
  font-size: clamp(48px, 7vw, 84px);
  line-height: .98;
  letter-spacing: -.055em;
}
.lead {
  max-width: 720px;
  margin: 28px 0 0;
  font-size: clamp(19px, 2vw, 24px);
  color: var(--muted);
}
.actions { display: flex; gap: 12px; margin-top: 34px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 12px;
  font-weight: 750;
  border: 1px solid var(--line);
}
.button.primary { background: var(--text); color: white; border-color: var(--text); }
.button.secondary { background: var(--surface); }
.section-heading { max-width: 740px; margin-bottom: 42px; }
.section-heading h2, .about h2 {
  margin: 0;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: -.04em;
}
.section-heading p:last-child { color: var(--muted); font-size: 18px; }
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.product-card {
  min-height: 320px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.product-card.featured { background: var(--text); color: white; }
.product-card h3 { margin: 18px 0 10px; font-size: 28px; letter-spacing: -.03em; }
.product-card p { margin: 0; color: var(--muted); }
.product-card.featured p { color: #cbd3e2; }
.product-card a { margin-top: 24px; font-weight: 800; }
.tag {
  display: inline-flex;
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  font-size: 12px;
  font-weight: 800;
}
.tag.neutral { background: var(--brand-soft); color: var(--brand); }
.alt {
  max-width: none;
  background: #101828;
  color: white;
}
.alt > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.principle-grid article {
  padding: 26px;
  border: 1px solid #344054;
  border-radius: 20px;
  background: #182230;
}
.principle-grid span { color: #84adff; font-weight: 800; }
.principle-grid h3 { margin: 22px 0 10px; font-size: 22px; }
.principle-grid p { color: #cbd5e1; margin: 0; }
.about {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 60px;
  align-items: start;
}
.about > p { margin: 0; font-size: 20px; color: var(--muted); }
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 28px 54px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}
@media (max-width: 820px) {
  .site-header { position: static; }
  nav { display: none; }
  .hero, .section { padding: 70px 20px; }
  .hero { padding-top: 80px; }
  .product-grid, .principle-grid, .about { grid-template-columns: 1fr; }
  .about { gap: 24px; }
}