* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Arial, sans-serif;
}

body {
  background: #f5f7fa;
  color: #333;
}

header {
  background: #0b3c5d;
  padding: 20px;
  color: white;
}

nav {
  max-width: 1100px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 20px;
  font-weight: 500;
}

.hero {
  background: linear-gradient(135deg, #0b3c5d, #328cc1);
  color: white;
  padding: 80px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 2.8em;
  margin-bottom: 15px;
}

.hero p {
  font-size: 1.2em;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 50px 20px;
}

.card {
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

footer {
  background: #0b3c5d;
  color: white;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
}

.button {
  display: inline-block;
  margin-top: 25px;
  padding: 12px 25px;
  background: #328cc1;
  color: white;
  border-radius: 30px;
  text-decoration: none;
}

@media (max-width: 768px) {
  nav {
    flex-direction: column;
  }
}