body {
  font-family: 'Segoe UI', sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
}
header {
  background: #003366;
  color: #fff;
  padding: 20px;
  text-align: center;
}
main {
  max-width: 900px;
  margin: 30px auto;
  padding: 20px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
form {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  align-items: center;
  margin-bottom: 20px;
}
select, button {
  padding: 10px;
  font-size: 16px;
  border-radius: 5px;
}
select {
  width: 250px;
}
button {
  background: #0066cc;
  color: white;
  border: none;
  cursor: pointer;
}
button:hover {
  background: #004d99;
}
footer {
  text-align: center;
  padding: 15px;
  font-size: 14px;
  background: #e6e6e6;
  color: #333;
}