body { font-family: Arial, sans-serif; background: #f9f9f9; margin: 0; padding: 0; }
header { background: #007BFF; color: white; padding: 10px; display: flex; align-items: center; justify-content: space-between; }
header img { height: 60px; }
nav a { color: white; margin: 0 10px; text-decoration: none; font-weight: bold; }
main { padding: 20px; }
footer { background: #eee; text-align: center; padding: 10px; margin-top: 20px; }
.banner { background: #ffeb3b; color: #000; padding: 10px; text-align: center; font-weight: bold; }
#whatsapp-float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 15px;
  right: 15px;
  background: #25d366;
  color: white;
  border-radius: 50%;
  text-align: center;
  font-size: 30px;
  line-height: 60px;
  z-index: 100;
  text-decoration: none;
}
form input, form textarea {
  width: 100%; padding: 10px; margin: 5px 0; box-sizing: border-box;
}
form button {
  background: #007BFF; color: white; padding: 10px 15px; border: none; cursor: pointer;
}