body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f6f9;
  margin: 0;
  padding: 0;
  color: #333;
}

header, .header {
  background-color: #003366;
  padding: 20px;
  text-align: center;
}

header img, .header img {
  max-height: 184px;
  margin-bottom: 10px;
}

h1, h2, h3 {
  color: #2b3e50;
  margin-top: 10px;
}

ul {
  padding-left: 1.5em;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1em;
}

th, td {
  padding: 8px 12px;
  border: 1px solid #ccc;
  text-align: left;
}

.note {
  font-style: italic;
  color: #666;
}

nav {
  text-align: center;
  margin-top: 10px;
  margin-bottom: 30px;
}

nav a {
  display: inline-block;
  margin: 0 10px;
  padding: 8px 14px;
  background-color: #003366;
  color: white;
  text-decoration: none;
  border-radius: 4px;
}

nav a:hover {
  background-color: #0055aa;
}

@media (max-width: 600px) {
  nav a {
    display: block;
    margin: 8px auto;
    width: 80%;
  }
}

.content {
  max-width: 800px;
  margin: 40px auto;
  background: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.app-links a {
  display: inline-block;
  margin: 10px 0;
  font-size: 1.1em;
  color: #0066cc;
  text-decoration: none;
}

.app-links a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 40px;
  text-align: center;
  color: #777;
  font-size: 0.9em;
}