.audio-merger-container{max-width:750px;margin:0 auto 50px;padding:15px 10px;background-color:#fff;border-radius:12px;box-shadow:0 4px 20px rgb(0 0 0 / .1)}.audio-merger-title{text-align:center;margin-bottom:15px;margin-top:0;font-size:28px;color:#2c3e50}.progress-view{padding:20px 0}.progress-header{display:flex;align-items:center;margin-bottom:15px}.progress-spinner{width:20px;height:20px;border:3px solid #f0f0f0;border-top:3px solid #3498db;border-radius:50%;animation:spin 1s linear infinite;margin-right:15px}.progress-container{flex-grow:1;height:20px;background-color:#ecf0f1;border-radius:10px;overflow:hidden}.progress-bar-inner{height:100%;width:0%;background-color:#3498db;transition:width 0.2s ease-in-out;border-radius:10px}.progress-percentage-text{font-weight:500;margin-left:15px;color:#2c3e50}.upload-section{border:2px dashed #adb5bd;border-radius:8px;padding:30px;text-align:center;margin:0 auto 25px;background:#f8f9fa;transition:all 0.3s;cursor:pointer;max-width:450px}.upload-section:hover{border-color:#2a73d9;background:#f1f3ff}.upload-section.drag-over{border-color:#2a73d9;background:#e9ecef}.upload-icon{color:#3498db;margin-bottom:10px;line-height:1}.drop-text{font-size:17px;margin-bottom:0;margin-top:10px;font-weight:500}.drop-or{margin-bottom:15px;margin-top:5px;font-size:16px}.upload-section p{text-align:center}.upload-btn{padding:9px 13px;background-color:#277bb2;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:16px;font-weight:500;transition:background-color 0.3s}.upload-btn:hover,.upload-btn:focus{background-color:#277bb2;color:#fff;box-shadow:none;outline:none}.upload-btn:active{background-color:#277bb2;transform:scale(.98)}.file-input{display:none}.sort-bar{display:flex;align-items:center;gap:10px;margin-bottom:15px;justify-content:center;flex-wrap:wrap}.sort-control,.format-control,.quality-control{display:flex;align-items:center;gap:5px}.quality-control{display:none}.sort-label{font-weight:500;color:#495057;font-size:17px}.sort-select{padding:9px 12px;border-radius:5px;border:1px solid #ced4da;font-size:16px;background:#fff;cursor:pointer;appearance:none;-webkit-appearance:none;-moz-appearance:none;background-image:url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 8L10 12L14 8' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 6px center;background-size:18px 18px;padding-right:40px;transition:border-color 0.2s,box-shadow 0.2s}.audio-merger-container .sort-select:focus,.audio-merger-container .format-select:focus{outline:none;border-color:#2a73d9;box-shadow:0 0 0 1px rgb(42 115 217 / .2);background-color:#fff}.file-list-container{margin-bottom:25px;margin-top:0;max-width:600px;margin-left:auto;margin-right:auto}.file-list{list-style-type:none;max-height:300px;overflow-y:auto;border:1px solid #e0e0e0;border-radius:6px;padding:10px;margin-top:0;margin-bottom:0}.file-item{display:flex;align-items:center;justify-content:space-between;padding:12px 15px;border-bottom:1px solid #f0f0f0;margin-bottom:0}.file-item.is-playing{flex-wrap:wrap}.file-list .file-item.dragging{opacity:.5;background:#f8f9fa;cursor:move}.file-list .file-item{cursor:grab}.file-item:last-child{border-bottom:none}.reorder-control{margin-right:10px}.audio-merger-container .reorder-input{width:40px;padding:6px;text-align:center;background-color:#fff;border:1px solid #d1d5db;font-size:14px;border-radius:4px;-moz-appearance:textfield;appearance:textfield}.audio-merger-container .reorder-input:focus{outline:none;border-color:#2a73d9;box-shadow:0 0 0 1px rgb(42 115 217 / .2);background-color:#fff}.audio-merger-container .reorder-input:hover{background-color:#fff}.reorder-input::-webkit-outer-spin-button,.reorder-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}.file-info{display:flex;flex-direction:column;min-width:0;align-items:flex-start;gap:4px;flex:1}.file-name{font-weight:500;color:#2c3e50;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;line-height:1.3;max-width:100%}.file-duration{color:#525a5b;font-size:.9rem}.file-meta{display:flex;align-items:center;gap:12px}.file-size{color:#525a5b;font-size:.9rem;border-left:1px solid #ccc;padding-left:12px}.file-bitrate{color:#525a5b;font-size:.9rem;border-left:1px solid #ccc;padding-left:12px}.play-link{color:#135989;font-size:.9rem;cursor:pointer;border-left:1px solid #ccc;padding-left:12px;font-weight:500;white-space:nowrap}.file-controls{display:flex;gap:10px}.audio-merger-container .control-btn{background:none;border:none;cursor:pointer;font-size:1.2rem;color:#525a5b;transition:color 0.3s}.play-btn:hover{color:#2ecc71}.delete-btn:hover{color:#e74c3c}.merge-section{margin-bottom:25px;margin-top:0}.merge-controls{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.merge-btn{padding:9px 13px;background-color:#0f8742;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color 0.3s;font-size:1rem}.merge-btn .am-spinner{display:none;width:18px;height:18px;border:3px solid rgb(255 255 255 / .3);border-top-color:#fff;border-radius:50%;margin-left:10px}.merge-btn.is-merging .am-spinner{display:inline-block;animation:spin 1s linear infinite}.merge-btn:hover,.merge-btn:focus{background-color:#0f8742;color:#fff;box-shadow:none;outline:none}.merge-btn:active{background-color:#0f8742;transform:scale(.98)}.merge-btn:disabled{background-color:#bdc3c7;cursor:not-allowed}.download-btn{padding:9px 13px;background-color:#277bb2;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color 0.3s;font-size:1rem;display:inline-flex;align-items:center;justify-content:center}.download-btn:hover,.download-btn:focus{background-color:#277bb2;color:#fff;box-shadow:none;outline:none}.download-btn:active{background-color:#277bb2;transform:scale(.98)}.download-btn:disabled{background-color:#bdc3c7;cursor:not-allowed}.btn-loader{display:none;width:18px;height:18px;border:2px solid rgb(255 255 255 / .3);border-top-color:#fff;border-radius:50%;animation:spin 0.8s linear infinite}.download-btn.is-downloading .btn-loader{display:inline-block}.clear-btn{padding:9px 13px;background-color:#c0392b;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color 0.3s;font-size:1rem}.clear-btn:hover,.clear-btn:focus{background-color:#c0392b;color:#fff;box-shadow:none;outline:none}.clear-btn:active{background-color:#c0392b;transform:scale(.98)}.audio-player{width:100%;margin-top:10px}.success-message{background-color:#d4edda;color:#155724;border:1px solid #c3e6cb}.error-message{background-color:#f8d7da;color:#721c24;border:1px solid #f5c6cb}.format-select{padding:9px 13px;border:1px solid #ddd;border-radius:6px;font-size:16px;font-weight:500;background-color:#fff;cursor:pointer;appearance:none;-webkit-appearance:none;-moz-appearance:none;background-image:url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 20 20' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 8L10 12L14 8' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 6px center;background-size:18px 18px;padding-right:40px;transition:border-color 0.2s,box-shadow 0.2s}.audio-merger-container .sort-select:hover,.audio-merger-container .format-select:hover{background-color:#fff}.result-view{text-align:center;padding:20px}.success-icon{width:50px;height:50px;color:#0f8742;margin-bottom:0}.result-message{font-size:1.2rem;font-weight:500;color:#2c3e50;margin-bottom:15px;text-align:center}.result-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.back-btn{padding:9px 13px;background-color:#697778;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background-color 0.3s;font-size:1rem}.back-btn:hover,.back-btn:focus{background-color:#697778;color:#fff;box-shadow:none;outline:none}.back-btn:active{background-color:#697778;transform:scale(.98)}.animated-loading-text{text-align:center;font-size:17px;color:#5a6a7a;height:20px;margin-top:10px}.empty-state{text-align:center;padding:30px;color:#525a5b}.drag-over{background-color:#e8f4fc;border:2px dashed #3498db}.am-hidden{display:none}@keyframes spin{to{transform:rotate(360deg)}}.faq-list{margin-top:1rem}.faq-list dt{font-weight:500;font-size:1.1em}.faq-list dd{margin-left:0;margin-top:.5rem;margin-bottom:1rem;padding-left:1rem;padding-bottom:10px;border-bottom:1px dashed #ddd}@media (max-width:768px){.audio-merger-container{margin-bottom:60px;padding:20px 0;border-radius:0;box-shadow:none;border-top:1px solid #e9e9e9;border-bottom:1px solid #e9e9e9}.sort-bar{justify-content:flex-start}.format-control{margin-left:0}.quality-control{margin-left:0}.upload-section{max-width:none;margin-left:0;margin-right:0}.merge-controls{padding:0 20px}.file-list{border-bottom:1px solid #e0e0e0;border-top:1px solid #e0e0e0;border-left:none;border-right:none;border-radius:0;padding-left:0;padding-right:0}.file-list-container{max-width:none}.file-item{flex-wrap:wrap;padding:12px 0}.result-view{padding:20px 0}ul#file-list{margin:0}.audio-merger-container .control-btn{padding:0 0 0 5px}}