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#f3f3f3;border-top:4px solid #007bff;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.empty-state{padding:3rem;text-align:center;color:#666}.empty-state-icon{font-size:4rem;margin-bottom:1rem;opacity:.5}.empty-state-message{font-size:1.1rem;margin-bottom:.5rem}.empty-state-hint{font-size:.9rem;color:#999}.error-message{padding:1rem;background:#fee;color:#c33;border-radius:6px;margin-bottom:1rem;border-left:4px solid #c33;display:flex;align-items:center;gap:.5rem}.error-icon{font-size:1.2rem}.search-container{margin-bottom:1rem;padding:1rem;background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a}.search-input{width:100%;padding:.75rem 1rem;border:2px solid #dee2e6;border-radius:6px;font-size:1rem;transition:all .2s}.search-input:focus{outline:none;border-color:#007bff;box-shadow:0 0 0 3px #007bff1a}.file-upload-area{border:2px dashed 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