:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5d6678;
  --brand: #3157d5;
  --brand-dark: #203da8;
  --border: #e4e8f0;
  --shadow: 0 14px 36px rgba(25, 42, 80, 0.10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }
.site-header {
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}
.nav {
  max-width: 1000px;
  margin: auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  font-weight: 750;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -.02em;
}
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; }
.nav-links a { text-decoration: none; color: var(--muted); font-weight: 600; }
.hero {
  max-width: 1000px;
  margin: 0 auto;
  padding: 92px 22px 72px;
  text-align: center;
}
.hero h1 {
  margin: 0;
  font-size: clamp(2.25rem, 7vw, 4.8rem);
  line-height: 1.05;
  letter-spacing: -.055em;
}
.hero .tagline {
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  color: var(--brand);
  font-weight: 720;
  margin: 22px 0 10px;
}
.hero p { max-width: 650px; margin: 0 auto; color: var(--muted); font-size: 1.08rem; }
.grid {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 22px 80px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.card h2 { margin-top: 0; font-size: 1.3rem; }
.card p { color: var(--muted); }
.button {
  display: inline-block;
  padding: 11px 17px;
  border-radius: 12px;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}
.button:hover { color: #fff; background: var(--brand-dark); }
.content {
  max-width: 840px;
  margin: 48px auto 80px;
  padding: 0 22px;
}
.document {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: clamp(24px, 5vw, 56px);
}
.document h1 { margin-top: 0; letter-spacing: -.03em; }
.document h2 { margin-top: 2.1rem; }
.document li { margin: .45rem 0; }
.meta { color: var(--muted); }
footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
  padding: 26px 20px 36px;
}
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  .nav { align-items: flex-start; }
  .nav-links { justify-content: flex-end; }
  .hero { padding-top: 70px; }
}