/* Base styles */

body {
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  margin: 0;
  background-color: #f2f5f9;
  color: #333;
  line-height: 1.6;
}

/* Header */

header {
  background: linear-gradient(135deg, #1f3f6d, #2e5fa3);
  color: white;
  text-align: center;
  padding: 60px 20px;
}

header h1 {
  margin-bottom: 10px;
  font-size: 2.3rem;
}

header p {
  font-size: 1.1rem;
  opacity: 0.95;
}

/* Navigation */

nav {
  background: white;
  padding: 14px;
  text-align: center;
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
}

nav a {
  margin: 0 18px;
  text-decoration: none;
  color: #1f3f6d;
  font-weight: 600;
  font-size: 0.95rem;
}

nav a:hover {
  color: #2e5fa3;
}

/* Sections */

section {
  max-width: 900px;
  margin: 40px auto;
  background: white;
  padding: 40px;
  border-radius: 8px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

h2 {
  margin-top: 0;
  color: #1f3f6d;
}

/* Lists */

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
}

/* Button */

button {
  background: #2e5fa3;
  color: white;
  border: none;
  padding: 14px 22px;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  margin-top: 10px;
}

button:hover {
  background: #1f3f6d;
}

/* Footer */

footer {
  margin-top: 60px;
  padding: 30px;
  text-align: center;
  background: #1f3f6d;
  color: white;
  font-size: 0.9rem;
}

/* Mobile */

@media (max-width: 768px) {

  header h1 {
    font-size: 1.8rem;
  }

  section {
    margin: 20px;
    padding: 28px;
  }

  nav a {
    display: inline-block;
    margin: 8px 10px;
  }

}