body {
  font-family: Arial, sans-serif;
  background:#f5f6fa;
  margin:0;
  padding:40px;
}

.form-container {
  max-width:500px;
  margin:auto;
  background:white;
  padding:25px;
  border-radius:10px;
}

h2 {
  text-align:center;
}

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

input, button {
  width:100%;
  padding:10px;
  margin-top:6px;
  border-radius:6px;
  border:1px solid #ccc;
}

.checkbox-group {
  margin-top:10px;
}

.checkbox-group label {
  font-weight:normal;
  display:block;
}

.error {
  color:red;
  font-size:0.9em;
  margin-top:4px;
}

button {
  background:#4CAF50;
  color:white;
  font-size:16px;
  border:none;
  margin-top:20px;
  cursor:pointer;
}

button:hover {
  background:#43a047;
}