body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #070b1a;
  color: #e6f0ff;
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  padding: 20px;
  background: #0b122b;
  border-bottom: 1px solid #1d2a5a;
}

.header a {
  color: #bcd4ff;
  margin-left: 15px;
  text-decoration: none;
  transition: 0.3s;
}

.header a:hover {
  color: #4ea1ff;
}

/* HERO */
.hero {
  text-align: center;
  padding: 120px 20px;
  background: radial-gradient(circle at top, #142a66, #070b1a);
}

.hero h2 {
  font-size: 40px;
}

.hero p {
  opacity: 0.8;
}

/* BUTTON */
.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 24px;
  background: #4ea1ff;
  color: white;
  border-radius: 8px;
  text-decoration: none;
  transition: 0.3s;
}

.btn:hover {
  background: #2f7fe0;
}

/* SECTIONS */
.section {
  padding: 60px 20px;
  text-align: center;
}

/* CARDS */
.cards {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.card {
  background: #0d1a3a;
  padding: 20px;
  border-radius: 12px;
  width: 220px;
  border: 1px solid #1d2a5a;
  transition: 0.3s;
  text-decoration: none;
  color: white;
}

.card:hover {
  transform: translateY(-5px);
  border-color: #4ea1ff;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 20px;
  background: #0b122b;
  border-top: 1px solid #1d2a5a;
}