:root {
  --dk: #0b4169;
  --md: #1565a8;
  --bg: #eef2f7;
  --text: #1a1a1a;
  --muted: #5a6570;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--md);
}

header {
  background: var(--dk);
  color: #fff;
  padding: 1.25rem 1.5rem;
}

header nav {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.logo {
  font-weight: 800;
  font-size: 1.35rem;
  color: #fff;
  text-decoration: none;
}

header a.btn {
  background: #fff;
  color: var(--dk);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

.hero {
  text-align: center;
  padding: 2.5rem 0 2rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--dk);
  margin-bottom: 0.75rem;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 36rem;
  margin: 0 auto 1.5rem;
}

.hero .cta {
  display: inline-block;
  background: var(--md);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
}

.card h2 {
  font-size: 1rem;
  color: var(--dk);
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.92rem;
  color: var(--muted);
}

.prose {
  background: #fff;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 1px 3px rgb(0 0 0 / 8%);
}

.prose h1 {
  color: var(--dk);
  margin-bottom: 1rem;
}

.prose h2 {
  color: var(--dk);
  margin: 1.5rem 0 0.5rem;
  font-size: 1.1rem;
}

.prose p,
.prose li {
  color: var(--muted);
  margin-bottom: 0.75rem;
}

footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid #dde3ea;
}

footer a {
  margin: 0 0.5rem;
}