:root{--color-bg: #f5f5f5;--color-surface: #fff;--color-text: #1a1a1a;--color-text-secondary: #555;--color-muted: #888;--color-primary: #2563eb;--color-success: #16a34a;--color-danger: #991b1b;--color-danger-bg: #fef2f2;--color-danger-border: #fecaca;--color-border: #ddd;--color-hover: #f5f5f5;--radius-sm: 4px;--radius-md: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--transition: .15s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font);background:var(--color-bg);color:var(--color-text);line-height:1.5}.app{max-width:800px;margin:0 auto;padding:20px}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.header h1{font-size:24px}.header-right{display:flex;align-items:center;gap:12px}.last-updated{font-size:12px;color:var(--color-muted)}.header-posts-label{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--color-muted)}.header-posts-input{width:50px;padding:4px 6px;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:13px;text-align:center}.header-posts-input:focus{border-color:var(--color-primary);outline:none}.refresh-btn{padding:6px 16px;background:var(--color-text);color:var(--color-surface);border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;transition:opacity var(--transition)}.refresh-btn:disabled{opacity:.6;cursor:not-allowed}.feed-list{background:var(--color-surface);border-radius:var(--radius-md);padding:16px;margin-bottom:24px;box-shadow:var(--shadow)}.feed-list h2{font-size:16px}.feed-list-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer;-webkit-user-select:none;user-select:none}.feed-list-toggle{font-size:14px;color:var(--color-muted)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 16px;color:var(--color-muted);gap:8px}.empty-state-icon{font-size:32px;opacity:.5}.empty-state-text{font-size:14px;font-style:italic;margin-bottom:4px}.feed-items{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.feed-item{display:flex;justify-content:space-between;align-items:center;padding:8px;background:#f9f9f9;border-radius:var(--radius-sm)}.feed-info{display:flex;flex-direction:column;gap:2px;overflow:hidden;flex:1}.feed-name{font-weight:600;font-size:14px}.feed-name-link{cursor:pointer;transition:color var(--transition)}.feed-name-link:hover{color:var(--color-primary)}.feed-url{font-size:12px;color:var(--color-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:500px}.feed-actions{display:flex;gap:6px;flex-shrink:0}.edit-btn{background:none;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:2px 8px;cursor:pointer;font-size:12px;color:var(--color-text-secondary);transition:background var(--transition)}.edit-btn:hover{background:var(--color-hover)}.remove-btn{background:none;border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:2px 8px;cursor:pointer;font-size:14px;color:var(--color-muted);flex-shrink:0;transition:color var(--transition)}.remove-btn:hover{color:var(--color-danger)}.remove-btn:disabled{opacity:.5}.feed-edit{display:flex;gap:8px;align-items:center;width:100%;flex-wrap:wrap}.edit-input{flex:1;min-width:120px;padding:6px 8px;border:1px solid var(--color-primary);border-radius:var(--radius-sm);font-size:13px;outline:none}.edit-actions{display:flex;gap:6px}.save-btn{padding:6px 16px;background:var(--color-primary);color:var(--color-surface);border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;transition:opacity var(--transition)}.save-btn:disabled{opacity:.6;cursor:not-allowed}.cancel-btn{padding:6px 12px;background:var(--color-surface);color:var(--color-text-secondary);border:1px solid var(--color-border);border-radius:var(--radius-sm);cursor:pointer;font-size:13px;transition:background var(--transition)}.cancel-btn:hover{background:var(--color-hover)}.add-feed{display:flex;gap:8px}.add-feed input{flex:1;padding:6px 10px;border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:14px;transition:border-color var(--transition)}.add-feed input:focus{border-color:var(--color-primary);outline:none}.add-btn{padding:6px 16px;background:var(--color-success);color:var(--color-surface);border:none;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;white-space:nowrap;transition:opacity var(--transition)}.add-btn:disabled{opacity:.6;cursor:not-allowed}.feed-help{margin-top:8px;font-size:12px;color:var(--color-muted);text-align:center}.feed-help code{background:#eee;padding:1px 4px;border-radius:3px;font-size:11px}.results{margin-bottom:16px}.feed-card{background:var(--color-surface);border-radius:var(--radius-md);padding:16px;margin-bottom:12px;box-shadow:var(--shadow);animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.feed-card-header{font-size:16px;margin-bottom:12px;color:var(--color-primary);border-bottom:2px solid var(--color-primary);padding-bottom:6px}.feed-error{color:var(--color-danger);font-size:14px}.feed-empty{color:var(--color-muted);font-size:14px;font-style:italic}.post-list{list-style:none;display:flex;flex-direction:column;gap:8px}.post-item{display:flex;gap:8px;padding:8px;border-radius:var(--radius-sm);transition:background var(--transition)}.post-item:hover{background:var(--color-hover)}.post-number{color:var(--color-muted);font-size:13px;min-width:24px;text-align:right;flex-shrink:0;padding-top:1px}.post-content{flex:1;min-width:0}.post-title{font-size:15px;font-weight:500;color:var(--color-text);text-decoration:none;line-height:1.4;display:block}.post-title:hover{text-decoration:underline}.post-snippet{font-size:13px;color:#666;margin-top:2px;line-height:1.4}.post-meta{display:flex;gap:8px;font-size:13px;color:var(--color-muted);margin-top:2px;flex-wrap:wrap}.post-link{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:300px}.post-domain{color:var(--color-primary)}.footer{text-align:center;color:var(--color-muted);font-size:13px;padding:16px}.skeleton-card{background:var(--color-surface);border-radius:var(--radius-md);padding:16px;margin-bottom:12px;box-shadow:var(--shadow)}.skeleton-line{height:14px;border-radius:var(--radius-sm);background:linear-gradient(90deg,#eee 25%,#e0e0e0,#eee 75%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite;margin-bottom:10px}.skeleton-line-title{height:18px;width:40%;margin-bottom:14px}.skeleton-line-text{width:100%}.skeleton-line-short{width:65%}.skeleton-line-meta{width:30%;height:12px}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.toast-container{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:8px;z-index:1000;pointer-events:none}.toast{padding:10px 16px;border-radius:var(--radius-sm);font-size:13px;color:var(--color-surface);box-shadow:0 2px 8px #00000026;animation:toastIn .25s ease-out;pointer-events:auto}.toast-success{background:var(--color-success)}.toast-error{background:var(--color-danger)}@keyframes toastIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.post-date{color:var(--color-muted)}.init-error{padding:40px 16px;text-align:center;color:var(--color-muted);font-size:14px}.retry-btn{margin-top:12px;padding:8px 20px;border:none;border-radius:var(--radius-md);background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.retry-btn:hover{opacity:.9}.back-to-top{position:fixed;bottom:72px;right:20px;width:40px;height:40px;border-radius:50%;border:none;background:var(--color-text);color:var(--color-surface);font-size:18px;cursor:pointer;box-shadow:0 2px 8px #0003;animation:toastIn .25s ease-out;transition:transform var(--transition),opacity var(--transition);z-index:999}.back-to-top:hover{transform:scale(1.1)}@media(max-width:600px){.add-feed{flex-direction:column}.add-feed input{flex:unset}.add-btn{width:100%}}