.input-demo {
  max-width: 500px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: #fafafa;
  border-radius: 8px;
}

.form-row {
  margin-bottom: 1rem;
}

.form-row label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: bold;
  color: #333;
}

.form-row input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
  box-sizing: border-box;
}