*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}:root{--bg: #0d1117;--bg2: #161b22;--bg3: #21262d;--border: #30363d;--text: #e6edf3;--text-muted: #8b949e;--accent: #58a6ff;--accent-hover: #79b8ff;--red: #f85149;--green: #56d364;--pink: #db61a2;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;background:var(--bg);color:var(--text)}#app{height:100%}.app{display:flex;height:100vh;overflow:hidden}.sidebar{width:280px;min-width:220px;background:var(--bg2);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--border)}.logo-area{display:flex;align-items:center;gap:8px}.logo-icon{font-size:20px}.logo-text{font-size:16px;font-weight:700;color:var(--accent)}.btn-add{margin:12px;padding:8px 12px;background:var(--accent);color:#0d1117;border:none;border-radius:6px;cursor:pointer;font-weight:600;font-size:13px;transition:background .2s}.btn-add:hover{background:var(--accent-hover)}.feeds-list{flex:1;overflow-y:auto;padding:4px 8px}.feed-item{padding:10px;border-radius:8px;cursor:pointer;margin-bottom:4px;border:1px solid transparent;transition:all .15s}.feed-item:hover{background:var(--bg3);border-color:var(--border)}.feed-item.active{background:var(--bg3);border-color:var(--accent)}.feed-item.disabled{opacity:.5}.feed-item-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.feed-actions{display:flex;gap:2px;opacity:0;transition:opacity .15s}.feed-item:hover .feed-actions,.feed-item.active .feed-actions{opacity:1}.icon-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);font-size:13px;padding:2px 4px;border-radius:4px;transition:all .15s;line-height:1}.icon-btn:hover{color:var(--text);background:var(--border)}.icon-btn.danger:hover{color:var(--red)}.feed-name{font-size:13px;font-weight:500;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.feed-meta{display:flex;justify-content:space-between;font-size:11px;color:var(--text-muted)}.badge{display:inline-block;padding:1px 6px;border-radius:10px;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.badge-blue{background:#58a6ff26;color:#58a6ff}.badge-red{background:#f8514926;color:#f85149}.badge-pink{background:#db61a226;color:#db61a2}.badge-gray{background:#8b949e26;color:#8b949e}.content{flex:1;display:flex;flex-direction:column;overflow:hidden;background:var(--bg)}.content-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);background:var(--bg2)}.content-title{display:flex;align-items:center;gap:10px}.content-title h2{font-size:16px;font-weight:600}.content-actions{display:flex;gap:8px}.feed-url-bar{padding:8px 20px;background:#58a6ff0d;border-bottom:1px solid var(--border);font-size:12px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.url-label{color:var(--text-muted)}.feed-url-bar code{color:var(--accent);background:var(--bg2);padding:2px 8px;border-radius:4px;font-size:12px;word-break:break-all}.url-hint{color:var(--text-muted)}.items-list{flex:1;overflow-y:auto;padding:12px 20px;display:flex;flex-direction:column;gap:8px}.item-card{background:var(--bg2);border:1px solid var(--border);border-radius:8px;padding:14px 16px;transition:border-color .15s}.item-card:hover{border-color:var(--accent)}.item-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:6px}.item-title{font-size:14px;font-weight:500;flex:1;line-height:1.4}.item-title a{color:var(--accent);text-decoration:none}.item-title a:hover{color:var(--accent-hover);text-decoration:underline}.item-date{font-size:11px;color:var(--text-muted);white-space:nowrap}.item-desc{font-size:13px;color:var(--text-muted);line-height:1.5;margin-bottom:8px}.item-footer{display:flex;justify-content:space-between;align-items:center}.item-author{font-size:12px;color:var(--text-muted)}.item-link{font-size:12px;color:var(--accent);text-decoration:none}.item-link:hover{text-decoration:underline}.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:40px;text-align:center}.welcome-icon{font-size:56px}.welcome h2{font-size:24px}.welcome>p{color:var(--text-muted)}.welcome-tips{display:flex;gap:16px;margin:8px 0;flex-wrap:wrap;justify-content:center}.tip{display:flex;align-items:flex-start;gap:10px;background:var(--bg2);border:1px solid var(--border);padding:14px;border-radius:10px;max-width:180px;text-align:left}.tip-icon{font-size:20px}.tip strong{font-size:13px}.tip div{font-size:12px;color:var(--text-muted);line-height:1.4}.btn-lg{padding:12px 24px;font-size:15px;margin-top:8px}.btn-primary{background:var(--accent);color:#0d1117;border:none;border-radius:6px;padding:7px 14px;cursor:pointer;font-weight:600;font-size:13px;transition:background .2s}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:var(--bg3);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:7px 14px;cursor:pointer;font-size:13px;transition:all .2s}.btn-secondary:hover{border-color:var(--accent);color:var(--accent)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:100}.modal{background:var(--bg2);border:1px solid var(--border);border-radius:12px;width:500px;max-width:95vw;max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-header h3{font-size:16px}.modal-form{padding:20px;display:flex;flex-direction:column;gap:14px}.form-row{display:flex;flex-direction:column;gap:5px}.form-row label{font-size:12px;color:var(--text-muted);font-weight:500}.optional{font-weight:400}.form-row input,.form-row select{background:var(--bg3);border:1px solid var(--border);border-radius:6px;padding:8px 10px;color:var(--text);font-size:13px;outline:none;transition:border-color .15s;width:100%}.form-row input:focus,.form-row select:focus{border-color:var(--accent)}.modal-actions{display:flex;justify-content:flex-end;gap:8px;padding-top:4px}.notification{position:fixed;bottom:20px;right:20px;padding:12px 16px;border-radius:8px;font-size:13px;max-width:420px;z-index:200;animation:slideIn .2s ease;word-break:break-word}.notification.success{background:#56d36426;border:1px solid var(--green);color:var(--green)}.notification.error{background:#f8514926;border:1px solid var(--red);color:var(--red)}@keyframes slideIn{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.spinning{animation:spin .8s linear infinite;display:inline-block}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.empty-state,.empty-items{padding:24px;text-align:center;color:var(--text-muted);font-size:13px;line-height:1.7}