:root {
  --navy: #0a1f44;
  --navy-light: #12356b;
  --bg: #f8f9fc;
  --text: #222;
  --muted: #555;
  --radius: 10px;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.site-header {
  background: white;
  border-bottom: 1px solid #ddd;
  padding: 0.75rem 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 800;
  color: var(--navy);
  font-size: 1.25rem;
}
.nav-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}
.nav-links .btn-primary {
  color: #fff;
}

/* Hero */
.hero {
  background: var(--navy);
  color: white;
  padding: 4rem 0;
  text-align: center;
}
.hero h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.hero .highlight {
  color: #dbe7ff;
}
.hero p {
  margin-bottom: 2rem;
}

/* Sections */
.section {
  padding: 3rem 0;
}
.section.alt {
  background: white;
}
.section h2 {
  text-align: center;
  margin-bottom: 2rem;
}

/* Grid */
.grid {
  display: grid;
  gap: 1.5rem;
}
@media (min-width: 700px) {
  .grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1000px) {
  .grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Cards */
.card {
  background: white;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  padding: 1rem;
}
.card h3 {
  margin-bottom: 0.5rem;
}
.card footer {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
}
.btn-primary {
  background: var(--navy);
  color: white;
}
.btn-primary:hover {
  background: var(--navy-light);
}
.btn-secondary {
  background: #eee;
  color: var(--text);
}

/* Footer */
.site-footer {
  background: var(--navy);
  color: white;
  text-align: center;
  padding: 1.5rem 0;
  margin-top: 2rem;
}