*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background:#f5f5f5;color:#333;line-height:1.6}.container{max-width:800px;margin:0 auto;padding:40px 20px}header{text-align:center;margin-bottom:40px}header h1{font-size:2.5rem;color:#cc0000;margin-bottom:10px}header p{color:#666;font-size:1.1rem}.download-section{background:white;border-radius:12px;padding:30px;box-shadow:0 2px 10px rgba(0,0,0,.1)}.url-input-container,.url-section{margin-bottom:20px}.url-section{display:flex;gap:10px}.url-section .url-input{flex:1 1;resize:none;font-family:inherit}.url-input,.url-section .url-input{padding:15px;font-size:16px;border:2px solid #ddd;border-radius:8px;transition:border-color .3s}.url-input{width:100%}.url-input:focus{outline:none;border-color:#cc0000}.url-input:disabled{background:#f5f5f5;cursor:not-allowed}.load-url-btn{padding:15px 24px;font-size:16px;font-weight:600;background:#cc0000;color:white;border:none;border-radius:8px;cursor:pointer;white-space:nowrap;transition:background .2s}.load-url-btn:hover:not(:disabled){background:#aa0000}.load-url-btn:disabled{background:#999;cursor:not-allowed}.video-info{display:flex;gap:20px;margin-bottom:20px;padding:15px;background:#f9f9f9;border-radius:8px}.thumbnail{width:160px;height:90px;object-fit:cover;border-radius:4px}.playlist-option{margin-bottom:15px;padding:12px;background:#fff3e0;border:1px solid #ffcc80;border-radius:8px}.playlist-option label{display:flex;align-items:center;gap:8px;cursor:pointer;font-weight:500;color:#e65100}.playlist-option input[type=checkbox]{width:18px;height:18px}.playlist-warning{display:block;margin-top:8px;font-size:.85rem;color:#bf360c;font-style:italic}.playlist-info-card{margin-bottom:20px;padding:20px;background:#f0f4ff;border:1px solid #bbdefb;border-radius:8px}.playlist-info-card img.playlist-thumbnail{width:160px;height:90px;object-fit:cover;border-radius:4px;margin-bottom:12px}.playlist-preview{margin-top:16px}.playlist-preview-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.playlist-preview h5{margin:0;color:#555;font-size:.9rem}.playlist-select-actions{display:flex;gap:6px}.playlist-select-btn{background:transparent;border:1px solid #bbdefb;color:#1565c0;padding:4px 10px;border-radius:4px;cursor:pointer;font-size:.8rem;font-weight:600}.playlist-select-btn:hover{background:#e3f2fd}.playlist-select-btn:disabled{opacity:.5;cursor:not-allowed}.playlist-preview-list{display:flex;flex-direction:column;gap:4px;max-height:420px;overflow-y:auto;padding-right:4px}.playlist-preview-item{display:flex;align-items:center;gap:8px;padding:6px 8px;background:white;border-radius:4px;cursor:pointer;border:2px solid transparent;transition:border-color .15s,background .15s}.playlist-preview-item:hover{background:#f5f5f5}.playlist-preview-item.selected{border-color:#cc0000;background:#fff5f5}.playlist-checkbox{width:16px;height:16px;cursor:pointer;accent-color:#cc0000;flex-shrink:0}.playlist-video-number{color:#999;font-size:.8rem;font-weight:700;min-width:30px;text-align:right}.playlist-preview-item img{width:68px;height:38px;object-fit:cover;border-radius:3px;flex-shrink:0}.playlist-preview-item .playlist-video-title{flex:1 1;min-width:0;font-size:.82rem;color:#333;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.details h3{margin-bottom:8px;font-size:1.1rem}.details p{color:#666;font-size:.9rem;margin-bottom:4px}.details .filesize{color:#2e7d32;font-weight:600;font-size:.85rem}.options{display:flex;gap:20px;margin-bottom:20px;flex-wrap:wrap}.options label{display:flex;align-items:center;gap:8px;cursor:pointer}.options select{padding:8px;border:1px solid #ddd;border-radius:4px;margin-left:8px}.options input[type=checkbox]{width:18px;height:18px}.download-btn{width:100%;padding:15px;font-size:1.1rem;background:#cc0000;color:white;border:none;border-radius:8px;cursor:pointer;transition:background .3s}.download-btn:hover:not(:disabled){background:#aa0000}.download-btn:disabled{background:#999;cursor:not-allowed}.reset-btn{width:100%;padding:15px;font-size:1.1rem;background:#666;color:white;border:none;border-radius:8px;cursor:pointer;margin-top:10px}.reset-btn:hover{background:#444}.progress-section{margin-top:20px;padding:15px;background:#f9f9f9;border-radius:8px}.progress-video-name{font-size:14px;font-weight:600;color:#333;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.progress-bar{height:30px;background:#e0e0e0;border-radius:15px;overflow:hidden;margin-bottom:10px}.progress-fill{height:100%;background:linear-gradient(90deg,#cc0000,#ff4444);transition:width .3s ease}.progress-stats{display:flex;justify-content:space-between;align-items:center;color:#666;font-size:.9rem}.complete-section{margin-top:20px;padding:20px;background:#e8f5e9;border-radius:8px;text-align:center}.complete-section p{margin-bottom:15px;color:#2e7d32}.loading{text-align:center;padding:20px;color:#666}.error{color:#d32f2f;padding:10px;margin:10px 0;background:#ffebee;border-radius:4px}footer{text-align:center;margin-top:40px;color:#999;font-size:.85rem}.search-download-container{width:100%}.tab-switcher{display:flex;gap:10px;margin-bottom:20px;border-bottom:2px solid #ddd;padding-bottom:10px}.tab-btn{flex:1 1;padding:12px 20px;border:none;background:#f5f5f5;color:#666;border-radius:8px;cursor:pointer;font-size:1rem;transition:all .3s}.tab-btn:hover{background:#e0e0e0}.tab-btn.active{background:#cc0000;color:white}.search-form,.search-section{margin-bottom:20px}.search-form{display:flex;gap:10px}.search-input{flex:1 1;padding:15px;font-size:16px;border:2px solid #ddd;border-radius:8px;transition:border-color .3s}.search-input:focus{outline:none;border-color:#cc0000}.search-input:disabled{background:#f5f5f5;cursor:not-allowed}.search-btn{padding:15px 30px;font-size:16px;background:#cc0000;color:white;border:none;border-radius:8px;cursor:pointer;transition:background .3s}.search-btn:hover:not(:disabled){background:#aa0000}.search-btn:disabled{background:#999;cursor:not-allowed}.selected-video-card{display:flex;gap:15px;padding:15px;background:#f0f8ff;border:2px solid #4a90d9;border-radius:8px;margin-bottom:20px}.selected-video-card img{width:160px;height:90px;object-fit:cover;border-radius:4px}.selected-video-card .info{flex:1 1}.selected-video-card h4{margin-bottom:8px;font-size:1.1rem}.selected-video-card p{color:#666;font-size:.9rem;margin-bottom:10px}.change-btn{padding:8px 16px;background:#666;color:white;border:none;border-radius:4px;cursor:pointer;font-size:.9rem}.change-btn:hover{background:#444}.search-results{margin-top:20px}.search-results h4{margin-bottom:15px;color:#333}.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:15px;gap:15px;margin-bottom:20px}.result-card{border:1px solid #ddd;border-radius:8px;overflow:hidden;cursor:pointer;transition:all .3s;background:white}.result-card:hover{box-shadow:0 4px 12px rgba(0,0,0,.15);transform:translateY(-2px)}.result-card.selected{border-color:#cc0000;box-shadow:0 0 0 2px #cc0000}.result-card img{width:100%;height:150px;object-fit:cover}.result-info{padding:12px}.result-info h5{font-size:.95rem;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.result-info .channel{color:#666;font-size:.85rem;margin-bottom:4px}.result-info .date{color:#999;font-size:.8rem}.select-btn{width:calc(100% - 24px);margin:0 12px 12px;padding:10px;background:#cc0000;color:white;border:none;border-radius:4px;cursor:pointer;font-size:.9rem;opacity:0;transition:opacity .3s}.result-card:hover .select-btn{opacity:1}.select-btn:hover{background:#aa0000}.load-more-btn{width:100%;padding:12px;background:#f5f5f5;border:1px solid #ddd;border-radius:8px;cursor:pointer;font-size:1rem;transition:all .3s}.load-more-btn:hover:not(:disabled){background:#e0e0e0}.load-more-btn:disabled{opacity:.6;cursor:not-allowed}@media (max-width:600px){.video-info{flex-direction:column}.thumbnail{width:100%;height:auto}.options{gap:10px}.options,.search-form,.tab-switcher{flex-direction:column}.results-grid{grid-template-columns:1fr}.selected-video-card{flex-direction:column}.selected-video-card img{width:100%;height:auto}.select-btn{opacity:1}}.history-section{margin-bottom:20px}.history-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.history-header h4{color:#333}.history-clear-btn{padding:6px 12px;background:#f5f5f5;border:1px solid #ddd;border-radius:4px;cursor:pointer;font-size:.85rem;color:#d32f2f;transition:all .3s}.history-clear-btn:hover{background:#ffebee;border-color:#d32f2f}.history-list{display:flex;flex-direction:column;gap:10px;max-height:60vh;overflow-y:auto}.history-item{display:flex;align-items:center;gap:15px;padding:12px;background:white;border:1px solid #ddd;border-radius:8px;transition:all .3s}.history-item:hover{box-shadow:0 2px 8px rgba(0,0,0,.1)}.history-item img{width:120px;height:68px;object-fit:cover;border-radius:4px;flex-shrink:0}.history-info{flex:1 1;min-width:0}.history-info h5{font-size:.9rem;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.history-info .channel{color:#666;font-size:.85rem;margin-bottom:4px}.history-info .date{color:#999;font-size:.8rem}.history-redownload-btn,.history-remove-btn{padding:8px 14px;border:none;border-radius:4px;cursor:pointer;font-size:.85rem;transition:all .3s;flex-shrink:0}.history-redownload-btn{background:#cc0000;color:white}.history-redownload-btn:hover{background:#aa0000}.history-remove-btn{background:#f5f5f5;color:#999;font-weight:700}.history-remove-btn:hover{background:#ffebee;color:#d32f2f}@media (max-width:600px){.history-item{flex-direction:column;align-items:flex-start}.history-item img{width:100%;height:auto}.history-info{width:100%}.history-redownload-btn,.history-remove-btn{align-self:flex-end}.tab-switcher{flex-wrap:wrap}}.url-textarea{width:100%;padding:15px;border:2px solid #ddd;border-radius:8px;font-size:14px;font-family:inherit;resize:vertical;min-height:120px;transition:border-color .2s;line-height:1.6}.url-textarea:focus{border-color:#cc0000;outline:none}.url-textarea:disabled{background:#f5f5f5;cursor:not-allowed}.url-count{font-size:13px;color:#666;margin-top:6px}.url-count.invalid{color:#d32f2f}.batch-action-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:#fff8e1;border:1px solid #ffc107;border-radius:8px;margin:12px 0}.batch-action-bar .batch-count{font-weight:600;color:#e65100}.batch-queue-btn{background:#ff9800;color:white;border:none;padding:8px 18px;border-radius:6px;cursor:pointer;font-size:14px;font-weight:600}.batch-queue-btn:hover{background:#f57c00}.batch-select-all-btn{background:transparent;border:1px solid #ff9800;color:#e65100;padding:6px 14px;border-radius:6px;cursor:pointer;font-size:13px}.batch-select-all-btn:hover{background:#fff3e0}.batch-checkbox{width:18px;height:18px;cursor:pointer;accent-color:#cc0000;margin-right:8px;flex-shrink:0}.result-item.batch-selected{border:2px solid #cc0000;background:#ffebee}.queue-summary{display:flex;align-items:center;gap:12px;padding:10px 16px;background:#f5f5f5;border-radius:8px;margin-bottom:12px;flex-wrap:wrap}.queue-summary .summary-chip{font-size:13px;padding:4px 10px;border-radius:12px;font-weight:600}.summary-chip.completed{background:#e8f5e9;color:#2e7d32}.summary-chip.downloading{background:#ffebee;color:#c62828}.summary-chip.queued{background:#f5f5f5;color:#666;border:1px solid #ddd}.summary-chip.errors{background:#fff3e0;color:#e65100}.queue-summary .add-urls-btn{margin-left:auto;background:transparent;border:1px solid #cc0000;color:#cc0000;padding:6px 14px;border-radius:6px;cursor:pointer;font-size:13px}.queue-summary .add-urls-btn:hover{background:#ffebee}.queue-item{display:flex;align-items:center;gap:12px;padding:12px;border:1px solid #e0e0e0;border-radius:8px;margin-bottom:8px;transition:opacity .2s}.queue-item.queued{opacity:.7}.queue-item.error{border-color:#ffcdd2;background:#fff5f5}.queue-item.complete{border-color:#c8e6c9;background:#f1f8f1}.queue-item-thumb{width:80px;height:45px;object-fit:cover;border-radius:4px;flex-shrink:0}.queue-item-info{flex:1 1;min-width:0}.queue-item-info h5{margin:0 0 2px;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.queue-item-info .channel{font-size:12px;color:#666;margin:0}.queue-item-progress{width:100%;height:8px;background:#e0e0e0;border-radius:4px;margin-top:6px;overflow:hidden}.queue-item-progress .fill{height:100%;border-radius:4px;transition:width .3s}.queue-item.downloading .fill{background:linear-gradient(90deg,#cc0000,#ff4444)}.queue-item.complete .fill{background:#4caf50;width:100%!important}.queue-item-stats{display:flex;gap:8px;font-size:11px;color:#666;margin-top:4px}.queue-item-error{font-size:12px;color:#d32f2f;margin-top:4px}.queue-item-video{font-size:12px;color:#666;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.progress-stats .cancel-btn{background:transparent;border:1px solid #d32f2f;color:#d32f2f;padding:2px 10px;border-radius:4px;cursor:pointer;font-size:12px;font-weight:600}.progress-stats .cancel-btn:hover{background:#ffebee}.queue-item-actions{display:flex;gap:6px;flex-shrink:0}.queue-item-actions button{padding:4px 10px;border-radius:4px;font-size:12px;cursor:pointer;border:1px solid}.queue-item-actions .cancel-btn{background:transparent;border-color:#d32f2f;color:#d32f2f}.queue-item-actions .cancel-btn:hover{background:#ffebee}.queue-item-actions .remove-btn{background:transparent;border-color:#999;color:#666}.queue-item-actions .remove-btn:hover{background:#f5f5f5;color:#333}.queue-item-actions .download-file-btn{background:#4caf50;border-color:#4caf50;color:white}.queue-item-actions .download-file-btn:hover{background:#388e3c}.queue-item-actions .dismiss-btn{background:transparent;border-color:#bbb;color:#999;font-weight:700;padding:4px 8px}.queue-item-actions .dismiss-btn:hover{background:#f5f5f5;color:#333}.queue-item-actions .retry-btn{background:transparent;border-color:#ff9800;color:#e65100}.queue-item-actions .retry-btn:hover{background:#fff3e0}.queue-empty{text-align:center;padding:40px 20px;color:#999}.queue-empty p{margin:8px 0}@media (max-width:600px){.queue-item{flex-wrap:wrap}.queue-item-thumb{width:60px;height:34px}.queue-item-actions{width:100%;justify-content:flex-end}.queue-summary{flex-direction:column;align-items:flex-start}.queue-summary .add-urls-btn{margin-left:0}.batch-action-bar{flex-wrap:wrap}}