body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f0f6fb;
  color: #333;
}

header {
  background: #5ca0d3;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
}

header .logo img {
  height: 40px;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
}

nav ul li {
  margin: 0 10px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  padding: 5px 10px;
}

nav ul li a.active, nav ul li a:hover {
  background: #3e7bb6;
  border-radius: 4px;
}

main {
  padding: 20px;
  max-width: 800px;
  margin: auto;
}

.section-box {
  background: white;
  padding: 20px;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  margin-bottom: 20px;
}

.section-box h1, .section-box h2 {
  background: #e6f0fa;
  padding: 10px;
  border-radius: 4px;
}

footer {
  text-align: center;
  padding: 10px;
  background: #e0eaf5;
  margin-top: 20px;
}