* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  color: #333;
}
header {
  background: #34495e;
  color: white;
  padding: 20px;
  text-align: center;
}
nav a {
  color: white;
  margin: 0 12px;
  text-decoration: none;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}
main {
  max-width: 960px;
  margin: 20px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
}
.banner {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 5px;
  margin-bottom: 20px;
}
footer {
  background: #34495e;
  color: white;
  text-align: center;
  padding: 15px;
  margin-top: 40px;
}
form input, form textarea {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
}
form input[type="submit"] {
  background-color: #27ae60;
  color: white;
  border: none;
  font-weight: bold;
  padding: 10px;
  cursor: pointer;
}
form input[type="submit"]:hover {
  background-color: #1e874b;
}