:root {
  --primary: #0a3d62;
  --accent: #1e90ff;
  --bg: #ffffff;
  --bg-alt: #f4f7fb;
  --text: #1c2733;
  --muted: #5a6b7b;
}

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

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

.container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e5eaf0;
  z-index: 10;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--primary); text-decoration: none; }
nav a { margin-left: 22px; color: var(--muted); text-decoration: none; font-weight: 500; }
nav a:hover { color: var(--accent); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  padding: 96px 0;
  text-align: center;
}
.hero h1 { font-size: 2.6rem; margin-bottom: 16px; }
.hero p { font-size: 1.15rem; max-width: 640px; margin: 0 auto 28px; opacity: 0.95; }

.btn {
  display: inline-block;
  background: #fff;
  color: var(--primary);
  padding: 12px 28px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.2); }

/* Sections */
.section { padding: 72px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { font-size: 2rem; margin-bottom: 28px; color: var(--primary); }
.section p { color: var(--muted); max-width: 760px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.card {
  background: #fff;
  border: 1px solid #e5eaf0;
  border-radius: 10px;
  padding: 28px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover { box-shadow: 0 10px 30px rgba(10,61,98,0.08); transform: translateY(-3px); }
.card h3 { color: var(--primary); margin-bottom: 10px; }
.card p { color: var(--muted); }

/* Footer */
.site-footer { background: var(--primary); color: #cdd9e5; padding: 28px 0; text-align: center; }

@media (max-width: 640px) {
  .hero h1 { font-size: 2rem; }
  nav a { margin-left: 14px; font-size: 0.9rem; }
}