/* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background-color: #f4f6f8;
  color: #333;
  line-height: 1.6;
  padding-bottom: 50px;
}

/* Header navigation */
header {
  background-color: #004080;
  padding: 15px 0;
}

header nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 30px;
}

header nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

header nav ul li a:hover {
  color: #ffcc00;
}

/* Main content styling */


/* Typography */
h2 {
  font-size: 2.2em;
  color: #004080;
  margin-bottom: 20px;
}

h3 {
  color: #004080;
  margin-top: 30px;
  margin-bottom: 10px;
  font-size: 1.4em;
}

h4 {
  color: #0066cc;
  margin-top: 20px;
  margin-bottom: 10px;
  font-size: 1.2em;
}

ul, ol {
  margin-left: 25px;
  margin-bottom: 20px;
}

ul li, ol li {
  margin-bottom: 10px;
}

p {
  margin-bottom: 15px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 25px 0;
  font-size: 0.95em;
}

table th, table td {
  border: 1px solid #ddd;
  padding: 10px;
  text-align: center;
}

table th {
  background-color: #004080;
  color: #fff;
}

table tr:nth-child(even) {
  background-color: #f2f2f2;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px;
  color: #777;
  font-size: 0.9em;
}
main {
  max-width: 900px;
  margin: 40px auto;
  background: #fff;
  padding: 40px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  text-align: left;
}