:root {
  --color-primary: #0b3d91;
  --color-primary-dark: #082a66;
  --color-accent: #f2a900;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f7fa;
  --color-text: #1a1a1a;
  --color-text-muted: #5a6472;
  --max-width: 1100px;
  font-size: 16px;
}

* { box-sizing: border-box; }

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

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid #e5e8ec;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}
.logo span { color: var(--color-accent); }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-text);
  font-weight: 500;
}
.main-nav a:hover { color: var(--color-primary); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  padding: 5rem 0;
  text-align: center;
}
.hero h1 { font-size: 2.5rem; margin: 0 0 1rem; }
.hero p { font-size: 1.15rem; opacity: 0.9; margin: 0 0 2rem; }

.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #1a1a1a;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 999px;
}
.btn:hover { text-decoration: none; opacity: 0.9; }

/* Sections */
.section { padding: 4rem 0; }
.section.alt { background: var(--color-bg-alt); }
.section h2 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
  color: var(--color-primary-dark);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.card {
  background: #fff;
  border: 1px solid #e5e8ec;
  border-radius: 12px;
  padding: 1.5rem;
}
.card h3 { margin-top: 0; color: var(--color-primary); }

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: #fff;
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .main-nav { display: none; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 1.9rem; }
}