.chord-section{background:#f9fafb;padding:5px 15px;border-radius:12px;box-shadow:0 4px 10px rgba(0,0,0,0.1);margin-bottom:50px}.section-subtitle{font-size:16px;font-weight:bold;color:#34495e;margin-top:25px;border-bottom:2px solid #e0e0e0;padding-bottom:5px}.highlight-box{background:#f1f3f5;padding:15px;border-radius:10px;margin:20px 0;font-weight:bold;color:#2c3e50}.chord-box{background:#eef1f4;padding:15px;border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,0.1);margin-top:10px}.chord-example{background:#ffffff;padding:12px;border-radius:6px;font-weight:bold;color:#2c3e50;border-left:4px solid #3498db;margin-top:8px}.section-subtitle i{color:#ff7f50;margin-right:5px}.tone-selection{background:#f8f9fa;padding:5px 15px 15px;border-radius:12px;box-shadow:0 4px 10px rgba(0,0,0,0.1);margin-bottom:30px}.section-title{font-size:16px;font-weight:bold;color:#2c3e50;border-left:5px solid #ff7f50;padding-left:12px;margin-bottom:15px}.chord-pre{background:#ffffff;padding:12px;border-radius:8px;border:1px solid #e0e0e0;font-size:16px;min-height:50px;display:none}.chord-results{display:flex;flex-direction:column;margin-top:10px}.chord-list,.chord-list-alt{background:#eef1f4;padding:10px;border-radius:6px;font-weight:bold;color:#2c3e50;border-left:4px solid #3498db;margin-top:10px}.divider{height:1px;background:#d1d8e0;margin:15px 0}.tone-info,.scale-info{background:#ffffff;padding:0 12px;border-radius:8px;border:1px solid #e0e0e0;font-size:16px;font-weight:bold;color:#2c3e50;margin-top:10px}.ws-rap{white-space:nowrap;overflow-x:auto}.chord-progression{background:#eef1f4;padding:15px;border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,0.1);margin-top:10px}.progression-title{font-size:16px;font-weight:bold;color:#34495e;margin-top:25px;border-bottom:2px solid #e0e0e0;padding-bottom:5px}.progression-info p{color:#2c3e50;line-height:1.6;margin-bottom:15px}.song-examples{background:#ffffff;padding:12px;border-radius:6px;font-weight:bold;color:#2c3e50;border-left:4px solid #e74c3c;margin-top:8px}.song-examples h4{color:#2c3e50;font-size:14px;margin-bottom:10px;font-weight:bold}.song-examples ul{margin:0;padding-left:20px}.song-examples li{color:#34495e;margin-bottom:8px;line-height:1.5;font-weight:normal}.song-examples strong{color:#2c3e50;font-weight:bold}