.contact-form {
  max-width: 600px;
  margin: 20px auto;
  padding: 30px;
  border-radius: 8px;
  font-family: sans-serif;
  font-size: 1.4rem;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

.required {
  color: #e74c3c;
  font-size: 0.8rem;
  margin-left: 5px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box; /* paddingを含めた幅計算 */
}

button {
  width: 100%;
  padding: 15px;
  background-color: #4d9bc1;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 1.4rem;
  cursor: pointer;
}

button:hover {
  background-color: #d2e8f1;
}