/* 既存のスタイルをそのまま使用 */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body { 
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; 
      max-width: 1200px; 
      margin: 20px auto; 
      padding: 20px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      min-height: 100vh;
    }
    
    .container {
      background: white;
      border-radius: 15px;
      padding: 30px 40px;
      box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    }
    
    h1 {
      color: #333;
      border-bottom: 3px solid #667eea;
      padding-bottom: 15px;
      margin-bottom: 25px;
      font-size: 28px;
    }
    
    /* 言語切替UI */
    .language-selector {
      position: absolute;
      top: 20px;
      right: 20px;
      background: white;
      border-radius: 20px;
      padding: 5px 15px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .language-selector select {
      border: none;
      background: transparent;
      font-size: 14px;
      cursor: pointer;
      padding: 5px;
    }
    
    .instructions {
      background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
      padding: 20px;
      border-radius: 10px;
      margin: 20px 0;
      border-left: 4px solid #667eea;
    }
    
    .instructions h3 {
      margin-top: 0;
      color: #667eea;
      font-size: 18px;
      margin-bottom: 15px;
    }
    
    .instructions ol {
      margin: 10px 0;
      padding-left: 25px;
      color: #555;
    }
    
    .instructions li {
      margin: 8px 0;
      line-height: 1.6;
    }
    
    .upload-area {
      border: 3px dashed #ccc;
      border-radius: 12px;
      padding: 40px;
      text-align: center;
      margin: 25px 0;
      background: #fafafa;
      transition: all 0.3s ease;
      cursor: pointer;
    }
    
    .upload-area:hover {
      border-color: #667eea;
      background: linear-gradient(135deg, #667eea05 0%, #764ba205 100%);
      transform: translateY(-2px);
    }
    
    .upload-area.has-file {
      border-color: #4CAF50;
      background: #e8f5e9;
      border-style: solid;
    }
    
    .upload-area.dragover {
      border-color: #667eea;
      background: linear-gradient(135deg, #667eea10 0%, #764ba210 100%);
      transform: scale(1.02);
    }
    
    #uploader {
      display: none;
    }
    
    .upload-label {
      display: inline-block;
      padding: 12px 30px;
      background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
      color: white;
      border-radius: 25px;
      cursor: pointer;
      transition: all 0.3s;
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    }
    
    .upload-label:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
    }
    
    .file-info {
      background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 100%);
      padding: 20px;
      border-radius: 10px;
      margin: 20px 0;
      display: none;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .file-info-row {
      display: flex;
      justify-content: space-between;
      margin: 8px 0;
      align-items: center;
    }
    
    .file-info-label {
      font-weight: 600;
      color: #555;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    .remove-file {
      color: #f44336;
      cursor: pointer;
      text-decoration: none;
      font-size: 14px;
      padding: 5px 10px;
      border: 1px solid #f44336;
      border-radius: 15px;
      transition: all 0.3s;
    }
    
    .remove-file:hover {
      background: #f44336;
      color: white;
    }
    
    .quality-options {
      background: #f5f5f5;
      padding: 15px;
      border-radius: 10px;
      margin: 20px 0;
      display: none;
    }
    
    .quality-options label {
      font-weight: 600;
      color: #555;
      margin-right: 10px;
    }
    
    .quality-select {
      padding: 8px 15px;
      border: 2px solid #ddd;
      border-radius: 20px;
      background: white;
      cursor: pointer;
      transition: all 0.3s;
      font-size: 14px;
    }
    
    .quality-select:focus {
      outline: none;
      border-color: #667eea;
    }
    
    .button-container {
      text-align: center;
      margin: 30px 0;
    }
    
    #convert-button {
      display: none;
      padding: 14px 40px;
      background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
      color: white;
      border: none;
      border-radius: 25px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      margin: 0 10px;
      transition: all 0.3s;
      box-shadow: 0 4px 15px rgba(76, 175, 80, 0.4);
    }
    
    #convert-button:hover:not(:disabled) {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(76, 175, 80, 0.5);
    }
    
    #convert-button:disabled {
      background: #ccc;
      cursor: not-allowed;
      box-shadow: none;
    }
    
    #progress-container {
      margin: 25px 0;
      display: none;
    }
    
    #progress {
      width: 100%;
      height: 35px;
      border-radius: 20px;
      appearance: none;
      -webkit-appearance: none;
      overflow: hidden;
      background: #f0f0f0;
    }
    
    #progress::-webkit-progress-bar {
      background-color: #f0f0f0;
      border-radius: 20px;
    }
    
    #progress::-webkit-progress-value {
      background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
      border-radius: 20px;
      transition: width 0.3s ease;
    }
    
    #progress::-moz-progress-bar {
      background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
      border-radius: 20px;
    }
    
    #progress-text {
      text-align: center;
      margin-top: 10px;
      color: #666;
      font-size: 14px;
      font-weight: 600;
    }
    
    .status {
      padding: 15px;
      border-radius: 10px;
      margin: 20px 0;
      display: none;
      font-weight: 500;
      animation: slideIn 0.3s ease;
    }
    
    @keyframes slideIn {
      from {
        opacity: 0;
        transform: translateY(-10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    .status.loading {
      background: linear-gradient(135deg, #fff3cd 0%, #ffe0a1 100%);
      color: #856404;
      border: 1px solid #ffc107;
    }
    
    .status.success {
      background: linear-gradient(135deg, #d4edda 0%, #a8e6b1 100%);
      color: #155724;
      border: 1px solid #4CAF50;
    }
    
    .status.error {
      background: linear-gradient(135deg, #f8d7da 0%, #f5c2c7 100%);
      color: #721c24;
      border: 1px solid #f44336;
    }
    
    .status.warning {
      background: linear-gradient(135deg, #fff3cd 0%, #ffe0a1 100%);
      color: #856404;
      border: 1px solid #ffc107;
    }
    
    #log {
      background: #1e1e1e;
      color: #0f0;
      padding: 15px;
      height: 200px;
      overflow-y: auto;
      font-family: 'Courier New', monospace;
      font-size: 12px;
      border-radius: 8px;
      display: none;
      margin: 20px 0;
      box-shadow: inset 0 2px 10px rgba(0,0,0,0.3);
    }
    
    details {
      margin: 20px 0;
    }
    
    summary {
      cursor: pointer;
      padding: 10px;
      background: #f5f5f5;
      border-radius: 8px;
      font-weight: 600;
      color: #555;
      transition: all 0.3s;
    }
    
    summary:hover {
      background: #e8e8e8;
    }
    
    .download-link {
      display: inline-block;
      padding: 14px 35px;
      background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
      color: white;
      text-decoration: none;
      border-radius: 25px;
      margin-top: 20px;
      transition: all 0.3s;
      font-weight: 600;
      font-size: 16px;
      box-shadow: 0 4px 15px rgba(33, 150, 243, 0.4);
    }
    
    .download-link:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(33, 150, 243, 0.5);
    }
    
    #result {
      text-align: center;
      margin: 30px 0;
    }
    
    #result video {
      width: 100%;
      max-width: 600px;
      margin-top: 20px;
      border-radius: 10px;
      box-shadow: 0 5px 20px rgba(0,0,0,0.2);
    }
    
    .file-size-info {
      margin: 15px 0;
      padding: 10px;
      background: #f0f4f8;
      border-radius: 8px;
      color: #555;
    }
    
    .loading-message {
      text-align: center;
      padding: 20px;
      color: #666;
      font-style: italic;
    }
    /* 既存のスタイルに追加 */

    /* バッチ処理関連のスタイル */
    .batch-status {
      background: linear-gradient(135deg, #2196F3 0%, #1976D2 100%);
      color: white;
      padding: 15px 20px;
      border-radius: 10px;
      margin: 20px 0;
      font-weight: 600;
      text-align: center;
      box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
      animation: pulse 2s ease-in-out infinite;
    }

    @keyframes pulse {
      0%, 100% {
        transform: scale(1);
      }
      50% {
        transform: scale(1.02);
      }
    }

    .batch-summary {
      background: white;
      border: 2px solid #667eea;
      border-radius: 12px;
      padding: 20px;
      margin: 20px 0;
    }

    .batch-summary h3 {
      margin-top: 0;
      color: #667eea;
      font-size: 20px;
      border-bottom: 2px solid #f0f0f0;
      padding-bottom: 10px;
      margin-bottom: 15px;
    }

    .processed-files {
      max-height: 400px;
      overflow-y: auto;
      padding: 10px;
      background: #f9f9f9;
      border-radius: 8px;
    }

    .processed-files::-webkit-scrollbar {
      width: 8px;
    }

    .processed-files::-webkit-scrollbar-track {
      background: #f1f1f1;
      border-radius: 10px;
    }

    .processed-files::-webkit-scrollbar-thumb {
      background: #667eea;
      border-radius: 10px;
    }

    .processed-files::-webkit-scrollbar-thumb:hover {
      background: #764ba2;
    }

    /* 自動ダウンロードオプション */
    .auto-download-option {
      background: #f0f4f8;
      padding: 10px 15px;
      border-radius: 8px;
      margin-top: 15px;
      border: 1px solid #ddd;
    }

    .auto-download-option label {
      cursor: pointer;
      user-select: none;
      color: #555;
      font-size: 14px;
    }

    .auto-download-option input[type="checkbox"] {
      width: 18px;
      height: 18px;
      cursor: pointer;
      accent-color: #667eea;
    }

    /* フォルダアップロード用のスタイル */
    .upload-area.folder-mode {
      border-color: #2196F3;
      background: linear-gradient(135deg, #2196F305 0%, #1976D205 100%);
    }

    .folder-indicator {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #2196F3;
      color: white;
      padding: 6px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      margin-top: 10px;
    }

    /* プログレスバーの改善 */
    #progress-container.batch-mode #progress {
      background: linear-gradient(90deg, #f0f0f0 0%, #e0e0e0 100%);
    }

    #progress-container.batch-mode #progress::-webkit-progress-value {
      background: linear-gradient(90deg, #2196F3 0%, #1976D2 100%);
    }

    /* ファイル数表示 */
    .file-count-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #667eea;
      color: white;
      border-radius: 50%;
      width: 30px;
      height: 30px;
      font-weight: bold;
      font-size: 14px;
      margin-left: 10px;
      box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    }

    /* エラー表示の改善 */
    .error-details {
      background: #ffebee;
      border: 1px solid #ef5350;
      border-radius: 8px;
      padding: 12px;
      margin-top: 10px;
      font-size: 13px;
      color: #c62828;
      white-space: pre-wrap;
      font-family: 'Courier New', monospace;
    }

    /* 成功メッセージの改善 */
    .success-item {
      background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 100%);
      border-left: 4px solid #4CAF50;
      padding: 12px;
      margin: 8px 0;
      border-radius: 0 8px 8px 0;
      transition: all 0.3s ease;
    }

    .success-item:hover {
      transform: translateX(5px);
      box-shadow: 0 2px 8px rgba(76, 175, 80, 0.2);
    }

    /* レスポンシブ対応 */
    @media (max-width: 768px) {
      .batch-status {
        font-size: 14px;
        padding: 12px 15px;
      }
      
      .batch-summary {
        padding: 15px;
      }
      
      .processed-files {
        max-height: 300px;
      }
    }
.upload-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-bottom: 20px;
}

.upload-btn {
  padding: 12px 25px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.upload-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.upload-btn:active {
  transform: translateY(0);
}

/* バッチ処理結果のスタイル */
.batch-summary {
  background: linear-gradient(135deg, #f0f4f8 0%, #e8ecf4 100%);
  padding: 20px;
  border-radius: 12px;
  margin: 20px 0;
  border: 1px solid #d0d9e6;
}

.batch-summary h3 {
  margin-top: 0;
  color: #667eea;
  font-size: 18px;
  border-bottom: 2px solid #e0e7f1;
  padding-bottom: 10px;
  margin-bottom: 15px;
}

.success-item {
  animation: slideInSuccess 0.4s ease;
}

.error-item {
  animation: slideInError 0.4s ease;
}

@keyframes slideInSuccess {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInError {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ファイルリスト表示の改善 */
details {
  cursor: pointer;
  user-select: none;
}

details summary {
  display: inline-block;
  padding: 5px 10px;
  background: #667eea;
  color: white;
  border-radius: 12px;
  font-size: 16px;
  transition: all 0.3s;
}

details summary:hover {
  background: #764ba2;
}

details[open] summary {
  margin-bottom: 10px;
}

/* エラー詳細 */
.error-details {
  background: #ffebee;
  border: 1px solid #ef5350;
  border-radius: 8px;
  padding: 12px;
  margin-top: 10px;
  font-size: 13px;
  color: #c62828;
  white-space: pre-wrap;
  font-family: 'Courier New', monospace;
}

/* 複数ファイル選択時の表示調整 */
.file-info.multiple-files {
  background: linear-gradient(135deg, #e8f5e9 0%, #f1f8e9 100%);
  border: 2px solid #4CAF50;
}

.file-info.multiple-files .file-info-label {
  color: #2e7d32;
}

/* レスポンシブ対応 */
@media (max-width: 600px) {
  .upload-buttons {
    flex-direction: column;
    gap: 10px;
  }
  
  .upload-btn {
    width: 100%;
  }
}
/* ====================================
   SEOコンテンツセクション
   ==================================== */

.seo-content-container {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 2px solid #e0e0e0;
}

.seo-section {
  margin-bottom: 50px;
  animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.seo-title {
  color: #333;
  font-size: 26px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #667eea;
  display: inline-block;
}

.seo-subtitle {
  color: #666;
  font-size: 16px;
  margin-bottom: 20px;
}

.seo-description {
  line-height: 1.8;
  color: #555;
}

.seo-points {
  margin: 20px 0;
  padding-left: 20px;
}

.seo-points li {
  margin: 10px 0;
  color: #666;
  position: relative;
  padding-left: 20px;
}

.seo-points li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #4CAF50;
  font-weight: bold;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-top: 25px;
}

.feature-card {
  background: linear-gradient(135deg, #f5f7fa 0%, #f0f4f8 100%);
  padding: 25px;
  border-radius: 12px;
  transition: all 0.3s ease;
  border: 1px solid #e0e0e0;
}

.feature-icon {
  font-size: 32px;
  display: block;
  margin-bottom: 15px;
}

.feature-card h3 {
  color: #333;
  font-size: 18px;
  margin-bottom: 10px;
}

.feature-card p {
  color: #666;
  font-size: 14px;
  line-height: 1.6;
}

/* Comparison Table */
.table-container {
  overflow-x: auto;
  margin: 25px 0;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  border-radius: 10px;
  overflow: hidden;
}

.comparison-table th {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 15px 10px;
  font-weight: 600;
  text-align: center;
  font-size: 14px;
}

.comparison-table td {
  padding: 12px 10px;
  text-align: center;
  border-bottom: 1px solid #e0e0e0;
  font-size: 14px;
}

.comparison-table tbody tr:hover {
  background: #f5f7fa;
}

.comparison-table .format-name {
  font-weight: 600;
  color: #333;
  text-align: left;
  padding-left: 20px;
}

.comparison-table .current-format {
  background: #4CAF50;
  color: white;
  padding: 3px 8px;
  border-radius: 15px;
  font-size: 12px;
}

/* Usage Guide */
.guide-scenarios {
  margin-top: 20px;
}

.scenario-item {
  background: #f8f9fa;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  margin-bottom: 15px;
  padding: 5px;
  transition: all 0.3s ease;
}

.scenario-item[open] {
  background: white;
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.scenario-title {
  padding: 15px 20px;
  font-weight: 600;
  cursor: pointer;
  display: block;
  transition: color 0.3s ease;
}

.scenario-title::before {
  content: '▶';
  display: inline-block;
  margin-right: 10px;
  transition: transform 0.3s ease;
}

details[open] .scenario-title::before {
  transform: rotate(90deg);
}

.scenario-steps {
  padding: 0 20px 20px 40px;
  color: #666;
  line-height: 1.8;
}

.scenario-steps li {
  margin: 10px 0;
}

/* Supported Formats Grid */
.formats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 15px;
  margin-top: 25px;
}

.format-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 8px;
  border: 1px solid #e0e0e0;
  transition: all 0.3s ease;
}

.format-badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 5px 12px;
  border-radius: 15px;
  font-weight: 600;
  font-size: 14px;
  min-width: 50px;
  text-align: center;
}

.format-desc {
  color: #666;
  font-size: 14px;
  flex: 1;
}

/* FAQ Section */
.faq-list {
  margin-top: 20px;
}

.faq-item {
  background: white;
  border: 1px solid #e0e0e0;
  border-radius: 10px;
  margin-bottom: 15px;
  padding: 5px;
  transition: all 0.3s ease;
}

.faq-item[open] {
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
  border-color: #667eea;
}

.faq-question {
  padding: 15px 20px;
  font-weight: 600;
  cursor: pointer;
  display: block;
  font-size: 16px;
}

.faq-question::before {
  content: 'Q';
  display: inline-block;
  background: #667eea;
  color: white;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  text-align: center;
  line-height: 25px;
  margin-right: 10px;
  font-size: 14px;
}

.faq-answer {
  padding: 0 20px 20px 55px;
  color: #666;
  line-height: 1.8;
}

/* Use Cases Grid */
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-top: 25px;
}

.usecase-card {
  background: white;
  border: 2px solid #e0e0e0;
  border-radius: 12px;
  padding: 25px;
  transition: all 0.3s ease;
}

.usecase-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 15px;
}

.usecase-icon {
  font-size: 36px;
}

.usecase-header h3 {
  color: #333;
  font-size: 18px;
  margin: 0;
}

.usecase-setting {
  background: #f0f4f8;
  padding: 8px 12px;
  border-radius: 20px;
  font-size: 13px;
  color: #666;
  margin-bottom: 15px;
  display: inline-block;
}

.usecase-tips {
  list-style: none;
  padding: 0;
}

.usecase-tips li {
  position: relative;
  padding-left: 25px;
  margin: 10px 0;
  color: #666;
  font-size: 14px;
  line-height: 1.6;
}

.usecase-tips li::before {
  content: '•';
  position: absolute;
  left: 10px;
  color: #667eea;
  font-weight: bold;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .seo-title {
    font-size: 22px;
  }
  
  .features-grid,
  .formats-grid,
  .usecases-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-table {
    font-size: 12px;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: 8px 5px;
  }
  
  .format-item {
    flex-direction: column;
    text-align: center;
  }
}

/* ダークモード対応（オプション） */
@media (prefers-color-scheme: dark) {
  .seo-content-container {
    border-top-color: #444;
  }
  
  .seo-title {
    color: #f0f0f0;
  }
  
  .seo-description,
  .seo-points li,
  .feature-card p,
  .format-desc,
  .faq-answer,
  .usecase-tips li {
    color: #ccc;
  }
  
  .feature-card,
  .scenario-item,
  .format-item,
  .faq-item {
    background: #2a2a2a;
    border-color: #444;
  }
  
  .comparison-table {
    background: #2a2a2a;
  }
  
  .comparison-table td {
    border-bottom-color: #444;
  }
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
  .meta-description-text {
    padding: 15px;
    margin: 20px 0 15px 0;
  }
  
  .meta-description-text p {
    font-size: 14px;
  }
}
/* ====================================
   サービスの強み・メリットセクション
   ==================================== */

.benefits-section {
  margin: 30px 0 40px 0;
  padding: 30px 20px;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border-radius: 15px;
  border: 2px solid #dee2e6;
}

.benefits-title {
  color: #333;
  font-size: 24px;
  text-align: center;
  margin-bottom: 30px;
  padding-bottom: 15px;
  border-bottom: 3px solid #667eea;
  font-weight: 700;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* 3列固定 */
  gap: 25px;
  margin-top: 25px;
}

.benefit-card {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.benefit-card h3 {
  color: #333;
  font-size: 18px;
  margin-bottom: 12px;
  font-weight: 600;
  line-height: 1.4;
}

.benefit-card p {
  color: #666;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}
.benefit-card .meta-text {
  font-size: 13px;
  color: #888;
  margin-top: 8px;
  font-style: italic;
}
/* レスポンシブ対応 */
@media (max-width: 768px) {
  .benefits-section {
    padding: 20px 15px;
    margin: 20px 0 30px 0;
  }
  
  .benefits-title {
    font-size: 20px;
    margin-bottom: 20px;
  }
  
  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .benefit-card {
    padding: 20px;
  }
  
  .benefit-card h3 {
    font-size: 16px;
  }
  
  .benefit-card p {
    font-size: 13px;
  }
}

/* 使い方セクションのマージン調整 */
.instructions {
  margin-top: 40px; /* アップロードエリアの後に来るのでマージンを確保 */
}

/* アップロードエリアの見た目を少し調整 */
.upload-area {
  margin: 30px 0; /* メリットセクションの後に適切な余白 */
}

/* ローディングメッセージの位置調整 */
.loading-message {
  margin: 20px 0;
}
/* ====================================
   他のフォーマットへのリンクセクション
   ==================================== */

.other-formats-section {
  margin-top: 30px;
  padding-top: 25px;
  border-top: 2px solid #e0e0e0;
}

.other-formats-section h4 {
  color: #333;
  font-size: 18px;
  margin-bottom: 15px;
  font-weight: 600;
}

.format-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 15px;
}

.format-link-btn {
  display: inline-block;
  padding: 12px 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-decoration: none;
  border-radius: 25px;
  text-align: center;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
  box-shadow: 0 3px 10px rgba(102, 126, 234, 0.3);
}

.format-link-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
  background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.format-link-btn:active {
  transform: translateY(0);
}