 *{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;color:#333;padding:20px}.container{max-width:1200px;margin:0 auto;background:rgba(255,255,255,.95);border-radius:20px;backdrop-filter:blur(10px);box-shadow:0 20px 40px rgba(0,0,0,.1);overflow:hidden}.header{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;padding:40px;text-align:center}.header h1{font-size:2.5rem;font-weight:700;margin-bottom:10px;text-shadow:0 2px 4px rgba(0,0,0,.1)}.header p{font-size:1.1rem;opacity:.9}.main-content{padding:40px}.upload-section{margin-bottom:40px}.upload-area{border:2px dashed #667eea;border-radius:15px;padding:60px 40px;text-align:center;background:linear-gradient(135deg,#f8f9ff 0%,#e8ecff 100%);transition:all .3s ease;cursor:pointer;position:relative;overflow:hidden}.upload-area:hover{border-color:#764ba2;background:linear-gradient(135deg,#e8ecff 0%,#dde4ff 100%);transform:translateY(-2px)}.upload-area.dragover{border-color:#764ba2;background:linear-gradient(135deg,#dde4ff 0%,#d2daff 100%);transform:scale(1.02)}.upload-icon{font-size:3rem;margin-bottom:20px;color:#667eea}.upload-text{font-size:1.2rem;color:#555;margin-bottom:10px}.upload-subtext{color:#888;font-size:.9rem}.file-input{display:none}.btn{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;border:none;padding:12px 30px;border-radius:25px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-decoration:none;display:inline-block;margin:10px 5px;box-shadow:0 4px 15px rgba(102,126,234,.3)}.btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(102,126,234,.4)}.btn:active{transform:translateY(0)}.btn.secondary{background:linear-gradient(135deg,#f8f9ff 0%,#e8ecff 100%);color:#667eea;box-shadow:0 4px 15px rgba(102,126,234,.1)}.controls{margin-bottom:30px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px}.search-box{flex:1;min-width:250px;position:relative}.search-input{width:100%;padding:12px 20px 12px 50px;border:2px solid #e0e6ff;border-radius:25px;font-size:1rem;background:white;transition:all .3s ease}.search-input:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1)}.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:#999;font-size:1.1rem}.bulk-actions{display:flex;gap:10px;flex-wrap:wrap}.feeds-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.feeds-count{color:#666;font-size:.9rem}.feeds-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:20px;margin-bottom:30px}.feed-card{background:white;border-radius:15px;padding:25px;box-shadow:0 4px 20px rgba(0,0,0,.08);transition:all .3s ease;border:2px solid transparent;position:relative;overflow:hidden}.feed-card:hover{transform:translateY(-5px);box-shadow:0 8px 30px rgba(0,0,0,.12);border-color:#667eea}.feed-card.selected{border-color:#667eea;background:linear-gradient(135deg,#f8f9ff 0%,#e8ecff 100%)}.feed-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);opacity:0;transition:opacity .3s ease}.feed-card.selected::before{opacity:1}.feed-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:15px}.feed-title{font-size:1.2rem;font-weight:600;color:#333;margin-bottom:8px;line-height:1.3}.feed-url{color:#666;font-size:.9rem;word-break:break-all;margin-bottom:15px}.feed-description{color:#777;font-size:.9rem;line-height:1.4;margin-bottom:15px;max-height:60px;overflow:hidden;text-overflow:ellipsis}.feed-actions{display:flex;gap:10px;align-items:center}.checkbox{width:20px;height:20px;border:2px solid #ddd;border-radius:4px;position:relative;cursor:pointer;transition:all .3s ease}.checkbox.checked{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);border-color:#667eea}.checkbox.checked::after{content:'✓';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:white;font-size:.8rem;font-weight:bold}.feed-link{color:#667eea;text-decoration:none;font-size:.9rem;font-weight:500;padding:5px 10px;border-radius:12px;transition:all .3s ease}.feed-link:hover{background:#f0f3ff;color:#764ba2}.empty-state{text-align:center;padding:80px 20px;color:#666}.empty-icon{font-size:4rem;margin-bottom:20px;color:#ddd}.empty-text{font-size:1.2rem;margin-bottom:10px}.empty-subtext{font-size:.9rem;color:#999}.export-section{background:linear-gradient(135deg,#f8f9ff 0%,#e8ecff 100%);padding:30px;border-radius:15px;text-align:center;margin-top:40px}.export-title{font-size:1.3rem;font-weight:600;color:#333;margin-bottom:15px}.export-description{color:#666;margin-bottom:25px;font-size:.95rem}.stats{display:flex;justify-content:center;gap:40px;margin-bottom:25px;flex-wrap:wrap}.stat-item{text-align:center}.stat-number{font-size:2rem;font-weight:700;color:#667eea;display:block}.stat-label{font-size:.9rem;color:#666;margin-top:5px}footer{margin-top:2rem;padding:1rem;text-align:center;font-size:.9rem;color:#fff}footer a{color:#fff;text-decoration:underline}.notification{position:fixed;top:20px;right:20px;padding:15px 25px;border-radius:10px;color:white;font-weight:500;box-shadow:0 4px 20px rgba(0,0,0,.15);transform:translateX(400px);transition:all .3s ease;z-index:1000;max-width:300px}.notification.show{transform:translateX(0)}.notification.success{background:linear-gradient(135deg,#4CAF50 0%,#45a049 100%)}.notification.error{background:linear-gradient(135deg,#f44336 0%,#da190b 100%)}.notification.info{background:linear-gradient(135deg,#2196F3 0%,#1976D2 100%)}.loading{display:inline-block;width:20px;height:20px;border:3px solid #f3f3f3;border-top:3px solid #667eea;border-radius:50%;animation:spin 1s linear infinite;margin-right:10px}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}.fade-in{animation:fadeIn .5s ease-in}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);display:flex;justify-content:center;align-items:center;z-index:1000;backdrop-filter:blur(5px)}.modal-content{background:white;border-radius:15px;box-shadow:0 20px 60px rgba(0,0,0,.3);max-width:500px;width:90%;max-height:80vh;overflow-y:auto;animation:modalSlideIn .3s ease-out}.modal-content.large{max-width:800px}@keyframes modalSlideIn{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:20px 25px;border-bottom:1px solid #eee;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;border-radius:15px 15px 0 0}.modal-header h3{margin:0;font-size:1.2rem;font-weight:600}.modal-close{background:none;border:none;color:white;font-size:1.5rem;cursor:pointer;padding:5px;line-height:1;border-radius:50%;width:30px;height:30px;display:flex;align-items:center;justify-content:center;transition:background-color .2s}.modal-close:hover{background:rgba(255,255,255,.2)}.modal-body{padding:25px}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:#333}.form-group input,.form-group textarea{width:100%;padding:12px 15px;border:2px solid #e1e5e9;border-radius:8px;font-size:14px;transition:border-color .2s,box-shadow .2s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:#667eea;box-shadow:0 0 0 3px rgba(102,126,234,.1)}.form-group textarea{resize:vertical;min-height:80px}.btn.small{padding:6px 12px;font-size:12px;margin-top:8px;margin-left:8px}.btn.primary{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;border:none}.btn.primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(102,126,234,.4)}.form-actions{display:flex;gap:15px;justify-content:flex-end;margin-top:30px;padding-top:20px;border-top:1px solid #eee}.feed-actions{display:flex;gap:10px;margin-top:15px;flex-wrap:wrap}.feed-actions .btn{flex:1;min-width:120px;padding:8px 12px;font-size:12px}.feed-edit-btn{background:#f8f9fa;color:#6c757d;border:1px solid #dee2e6}.feed-edit-btn:hover{background:#e9ecef;color:#495057}.feed-preview-btn{background:#e3f2fd;color:#1976d2;border:1px solid #bbdefb}.feed-preview-btn:hover{background:#bbdefb;color:#0d47a1}.feed-validation-status{display:inline-block;padding:4px 8px;border-radius:12px;font-size:11px;font-weight:500;margin-left:10px}.status-valid{background:#d4edda;color:#155724}.status-invalid{background:#f8d7da;color:#721c24}.status-checking{background:#fff3cd;color:#856404}.status-unknown{background:#e2e3e5;color:#6c757d}.feed-category{display:inline-block;background:#667eea;color:white;padding:2px 8px;border-radius:12px;font-size:11px;margin-top:8px}.loading-spinner{text-align:center;padding:40px;color:#6c757d}.loading-spinner::before{content:"⏳";font-size:24px;display:block;margin-bottom:10px;animation:spin 2s linear infinite}@keyframes spin{from{transform:rotate(0deg)}to{transform:rotate(360deg)}}.preview-content{max-height:60vh;overflow-y:auto}.preview-feed-info{border-bottom:1px solid #eee;padding-bottom:20px;margin-bottom:20px}.preview-articles{display:flex;flex-direction:column;gap:15px}.preview-article{border:1px solid #eee;border-radius:8px;padding:15px;background:#fafafa}.preview-article h4{margin:0 0 8px 0;color:#333}.preview-article p{margin:0 0 10px 0;color:#666;font-size:14px;line-height:1.4}.preview-article .article-meta{font-size:12px;color:#888}.validation-results{max-height:60vh;overflow-y:auto}.validation-item{display:flex;align-items:center;padding:15px;border:1px solid #eee;border-radius:8px;margin-bottom:10px}.validation-icon{font-size:20px;margin-right:15px;width:30px;text-align:center}.validation-details{flex:1}.validation-details h4{margin:0 0 5px 0;font-size:14px}.validation-details p{margin:0;font-size:12px;color:#666}@media (max-width:768px){.modal-content{width:95%;max-width:none;margin:10px}.modal-body{padding:20px}.form-actions{flex-direction:column}.feed-actions{flex-direction:column}.feed-actions .btn{min-width:auto}}@media (max-width:768px){.header{padding:30px 20px}.header h1{font-size:2rem}.main-content{padding:30px 20px}.controls{flex-direction:column;align-items:stretch}.search-box{min-width:auto}.bulk-actions{justify-content:center}.feeds-grid{grid-template-columns:1fr}.stats{gap:20px}}