@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

*, *::before, *::after {
  box-sizing: border-box;
}

:root {
  --navy: #0a2540;
  --navy-light: #133258;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text: #1e293b;
  --text-muted: #64748b;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
}

body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--navy);
  padding: 0 48px;
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

nav h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

nav h2 a {
  color: #ffffff;
  text-decoration: none;
  transition: opacity 0.2s;
}

nav h2 a:hover {
  opacity: 0.85;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
}

nav ul li a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.2s, background-color 0.2s;
}

nav ul li a:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.08);
}

nav ul li a.active {
  color: #ffffff;
}

/* Hero (index page) */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: white;
  padding: 96px 48px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero p {
  font-size: 1.1rem;
  color: #94a3b8;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Main container */
.container {
  max-width: 760px;
  margin: 64px auto;
  padding: 0 24px;
}

/* Section card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 48px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 20px;
  letter-spacing: -0.01em;
}

p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 0;
}

.btn {
  display: inline-block;
  margin-top: 24px;
  padding: 10px 22px;
  background-color: var(--accent);
  color: #ffffff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: var(--accent-hover);
}