/* 全体のスタイル */
body {
  font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

/* メインコンテナ */
.contact-container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: #1a1a1a;
}

/* フォーム */
.contact-form {
  background-color: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: #2c3e50;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: #0066cc;
  outline: none;
}

.submit-button {
  background: #0066cc;
  color: #fff;
  padding: 1rem 2rem;
  border: none;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.3s;
  width: 100%;
}

.submit-button:hover {
  background: #0052a3;
}

/* 戻るボタン */
.back-button-container {
  text-align: center;
  margin-top: 60px;
}

.back-button {
  display: inline-block;
  padding: 15px 40px;
  background: #0066cc;
  color: #fff;
  text-decoration: none;
  border-radius: 30px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.back-button:hover {
  background: #0052a3;
}

/* レスポンシブ対応 */

@media (max-width: 768px) {
  .contact-container {
    margin: 1rem auto;
  }

  .contact-form {
    padding: 1.5rem;
  }

  h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
  }

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