* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: #1f2933;
  background: #ffffff;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  background: #0a2540;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 40px;
  z-index: 1000;
}

.logo {
  font-size: 22px;
  font-weight: 700;
}

.nav-links a {
  color: #fff;
  margin-left: 20px;
  text-decoration: none;
  font-weight: 500;
}

.nav-links a:hover {
  text-decoration: underline;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #0a2540, #143d66);
  color: #fff;
  text-align: center;
  padding: 100px 20px;
}

.hero h1 {
  font-size: 42px;
  margin-bottom: 15px;
}

.hero p {
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto 30px;
}

.btn {
  background: #ffffff;
  color: #0a2540;
  padding: 12px 28px;
  text-decoration: none;
  font-weight: 600;
  border-radius: 25px;
}

.btn:hover {
  background: #e6eef7;
}

/* Sections */
.section {
  padding: 70px 20px;
  max-width: 1100px;
  margin: auto;
  text-align: center;
}

.section h2 {
  font-size: 32px;
  margin-bottom: 20px;
}

.section-text {
  max-width: 750px;
  margin: auto;
  font-size: 17px;
  color: #4b5563;
}

/* Light background */
.section.light {
  background: #f4f6f8;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.card {
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  text-align: left;
}

.card h3 {
  margin-top: 0;
  color: #0a2540;
}

.card p {
  color: #555;
}

/* Footer */
footer {
  background: #0a2540;
  color: #fff;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
}

/* Mobile */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 30px;
  }
  .navbar {
    flex-direction: column;
  }
  .nav-links {
    margin-top: 10px;
  }
}