:root {
  --ink: #1a1a1a;
  --muted: #5a6470;
  --accent: #1a3d6b;
  --rule: #e3e6ea;
  --bg: #ffffff;
}

* { box-sizing: border-box; }

html { font-size: 18px; }

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
a:hover { text-decoration-thickness: 2px; }

header {
  border-bottom: 1px solid var(--rule);
  padding: 1.4rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.2rem;
}

header .logo-link { display: inline-flex; }
header .logo-link img { display: block; height: 40px; width: auto; }

header nav { display: flex; gap: 1.6rem; align-items: center; }
header nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
}
header nav a:hover { color: var(--accent); }
header nav a.login {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 0.4rem 0.9rem;
  border-radius: 4px;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
  font-weight: 700;
}

.hero .lead {
  font-size: 1.2rem;
  color: var(--muted);
  margin: 0;
  font-weight: 400;
}

section + section { margin-top: 2.6rem; }

.intro p { font-size: 1.05rem; }

.links h2 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 0.6rem;
  font-weight: 600;
}
.links ul { margin: 0; padding-left: 1.2rem; }
.links li { margin-bottom: 0.3rem; }

footer {
  border-top: 1px solid var(--rule);
  padding: 1.6rem 2rem;
  font-size: 0.9rem;
  color: var(--muted);
  text-align: center;
}
footer a { color: var(--muted); }

@media (max-width: 640px) {
  header { flex-direction: column; align-items: flex-start; }
  header nav { gap: 1rem; flex-wrap: wrap; }
  .hero h1 { font-size: 1.9rem; }
  main { padding: 2rem 1.4rem; }
}