body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  margin: 0;
}
.site-nav {
  background: #005a87;
  padding: 1rem;
  text-align: center;
}
.site-nav a {
  color: #fff;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}
.container {
  max-width: 700px;
  margin: 2rem auto;
  background: #fff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
label {
  display: block;
  margin-top: 1rem;
  font-weight: bold;
}
input, select, textarea {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 5px;
}
button {
  margin-top: 1.5rem;
  background: #ff6f00;
  color: #fff;
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-weight: bold;
}
button:hover {
  background: #ff8f33;
}
.error {
  color: red;
  font-weight: bold;
}