body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}

form {
  background: #fff;
  padding: 25px;
  max-width: 600px;
  margin: auto;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

h2 {
  text-align: center;
  margin-bottom: 20px;
}

label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}

input[type="text"],
input[type="email"],
input[type="number"],
select {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
}

.error {
  color: red;
  font-size: 0.9em;
  display: none;
}

.declaration {
  margin-top: 20px;
}

button[type="submit"] {
  width: 100%;
  background-color: #007BFF;
  color: white;
  padding: 12px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: not-allowed;
  margin-top: 15px;
  transition: background-color 0.3s;
}

button[type="submit"]:enabled {
  cursor: pointer;
  background-color: #28a745;
}