body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f2f2f2;   
  color: #222;           
}

header {
  background: #3b6ea5;
  color: white;
  text-align: center;
  padding: 20px;        
}

.buttons {
  text-align: center;
  padding: 10px;
  background: #dde6f0;
}
button {
  padding: 8px 14px;
  cursor: pointer;     
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  background: #333;
  display: flex;
}

nav a {
  display: block;
  color: white;
  text-decoration: none; 
  padding: 14px 20px;
}

nav a:hover {
  background: #000;     
}

main {
  background: white;
  padding: 20px;
  margin: 20px;
}

footer {
  text-align: center;
  padding: 15px;
  color: #666;
}