*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #0f1117;--bg-secondary: #1a1d27;--bg-tertiary: #242836;--text-primary: #e8eaed;--text-secondary: #9aa0a6;--text-muted: #5f6368;--accent-blue: #4a9eff;--accent-gold: #f5c542;--accent-red: #e74c3c;--accent-green: #2ecc71;--border-color: #2d3140;--reader-width: 420px;--header-height: 56px;--transition: .2s ease}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-primary);color:var(--text-primary);overflow:hidden}#app{display:flex;flex-direction:column;height:100vh}#header{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 16px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);z-index:100;flex-shrink:0}.header-left{display:flex;align-items:center;gap:16px;min-width:0;flex:1}.logo{font-size:18px;font-weight:600;white-space:nowrap;cursor:pointer;-webkit-user-select:none;user-select:none}.logo:hover{color:var(--accent-blue)}.breadcrumbs{display:flex;align-items:center;gap:4px;font-size:13px;color:var(--text-secondary);min-width:0;overflow:hidden}.breadcrumbs a{color:var(--accent-blue);text-decoration:none;white-space:nowrap;cursor:pointer}.breadcrumbs a:hover{text-decoration:underline}.breadcrumbs .sep{color:var(--text-muted);flex-shrink:0}.header-right{flex-shrink:0}.search-container{position:relative}#search-input{width:260px;padding:6px 12px;font-size:14px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-tertiary);color:var(--text-primary);outline:none;transition:border-color var(--transition)}#search-input:focus{border-color:var(--accent-blue)}.search-results{position:absolute;top:100%;right:0;width:360px;max-height:400px;overflow-y:auto;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:8px;margin-top:4px;box-shadow:0 8px 24px #0006;z-index:200}.search-results.hidden{display:none}.search-result-item{padding:10px 14px;cursor:pointer;border-bottom:1px solid var(--border-color);transition:background var(--transition)}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background:var(--bg-tertiary)}.search-result-item .title{font-size:14px;font-weight:500;color:var(--text-primary)}.search-result-item .summary{font-size:12px;color:var(--text-secondary);margin-top:2px}#main{display:flex;flex:1;overflow:hidden;position:relative}.treemap-container{flex:1;position:relative;overflow:hidden;transition:flex var(--transition)}.treemap-container.with-reader{flex:1}#treemap-svg{width:100%;height:100%;display:block}.node rect{stroke:var(--bg-primary);stroke-width:1.5px;cursor:pointer;transition:opacity .15s}.node rect:hover{opacity:.85}.node-label{font-size:12px;fill:#fff;pointer-events:none;text-shadow:0 1px 3px rgba(0,0,0,.8);font-weight:500}.node-summary{font-size:10px;fill:#ffffffbf;pointer-events:none;text-shadow:0 1px 2px rgba(0,0,0,.8)}.reader-panel{width:var(--reader-width);min-width:var(--reader-width);background:var(--bg-secondary);border-left:1px solid var(--border-color);display:flex;flex-direction:column;overflow:hidden;transition:transform var(--transition)}.reader-panel.hidden{display:none}.reader-header{padding:16px;border-bottom:1px solid var(--border-color);flex-shrink:0}.btn-close{float:right;background:none;border:none;color:var(--text-secondary);font-size:22px;cursor:pointer;padding:0 4px;line-height:1}.btn-close:hover{color:var(--text-primary)}#reader-title{font-size:20px;font-weight:600;margin-bottom:8px;padding-right:30px}.prerequisites{font-size:12px;color:var(--text-secondary);margin-bottom:10px}.prerequisites a{color:var(--accent-gold);text-decoration:none;cursor:pointer}.prerequisites a:hover{text-decoration:underline}.detail-controls{display:flex;align-items:center;gap:6px}.detail-label{font-size:12px;color:var(--text-secondary);margin-right:4px}.detail-btn{padding:3px 10px;font-size:12px;border:1px solid var(--border-color);border-radius:4px;background:var(--bg-tertiary);color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}.detail-btn:hover{border-color:var(--accent-blue);color:var(--text-primary)}.detail-btn.active{background:var(--accent-blue);border-color:var(--accent-blue);color:#fff}.reader-content{flex:1;overflow-y:auto;padding:16px;font-size:14px;line-height:1.7;color:var(--text-primary)}.reader-content h3{font-size:16px;margin:16px 0 8px;color:var(--accent-blue)}.reader-content h4{font-size:14px;margin:12px 0 6px;color:var(--accent-gold)}.reader-content p{margin-bottom:10px}.reader-content ul,.reader-content ol{margin-left:20px;margin-bottom:10px}.reader-content li{margin-bottom:4px}.reader-content strong{color:var(--accent-gold)}.reader-content em{color:var(--text-secondary);font-style:italic}.reader-children{padding:12px 16px;border-top:1px solid var(--border-color);flex-shrink:0;max-height:200px;overflow-y:auto}.reader-children h4{font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:8px}.child-link{display:inline-block;padding:3px 10px;margin:2px 4px 2px 0;font-size:12px;border:1px solid var(--border-color);border-radius:4px;color:var(--accent-blue);cursor:pointer;text-decoration:none;transition:all var(--transition)}.child-link:hover{background:var(--bg-tertiary);border-color:var(--accent-blue)}.reader-sources{padding:8px 16px;border-top:1px solid var(--border-color);font-size:11px;color:var(--text-muted);flex-shrink:0}.reader-sources a{color:var(--text-secondary);text-decoration:none}.reader-sources a:hover{text-decoration:underline}@media(max-width:768px){:root{--reader-width: 100%}#main{flex-direction:column}.treemap-container.with-reader{flex:0 0 40%}.reader-panel{border-left:none;border-top:1px solid var(--border-color)}#search-input{width:160px}.search-results{width:280px}}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.loading{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-secondary);font-size:16px}.loading:after{content:"";width:20px;height:20px;margin-left:10px;border:2px solid var(--border-color);border-top-color:var(--accent-blue);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.treemap-tooltip{position:absolute;display:none;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;padding:8px 12px;font-size:12px;color:var(--text-primary);max-width:300px;pointer-events:none;z-index:300;box-shadow:0 4px 12px #0006;line-height:1.5}.treemap-tooltip strong{color:var(--accent-gold);font-size:13px}.treemap-tooltip span{color:var(--text-secondary)}.treemap-tooltip em{color:var(--text-muted);font-size:11px}.chat-section{border-top:1px solid var(--border-color);display:flex;flex-direction:column;max-height:300px;flex-shrink:0;transition:max-height .3s ease}.chat-section.collapsed{max-height:36px;overflow:hidden}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;cursor:pointer;-webkit-user-select:none;user-select:none;flex-shrink:0}.chat-title{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.chat-toggle-btn{background:none;border:none;color:var(--text-muted);font-size:12px;cursor:pointer;padding:2px 6px;transition:color var(--transition)}.chat-toggle-btn:hover{color:var(--text-primary)}.chat-section.collapsed .chat-toggle-btn{transform:rotate(180deg)}.chat-messages{flex:1;overflow-y:auto;padding:8px 16px;display:flex;flex-direction:column;gap:8px;min-height:60px;max-height:180px}.chat-msg{padding:6px 10px;border-radius:8px;font-size:13px;line-height:1.5;max-width:90%;word-wrap:break-word}.chat-msg.user{background:var(--accent-blue);color:#fff;align-self:flex-end;border-bottom-right-radius:2px}.chat-msg.assistant{background:var(--bg-tertiary);color:var(--text-primary);align-self:flex-start;border-bottom-left-radius:2px}.chat-msg.assistant strong{color:var(--accent-gold)}.chat-msg.system{background:none;color:var(--text-muted);font-size:11px;text-align:center;align-self:center;font-style:italic}.chat-input-row{display:flex;padding:8px 12px;gap:6px;flex-shrink:0}.chat-input{flex:1;padding:6px 10px;font-size:13px;border:1px solid var(--border-color);border-radius:6px;background:var(--bg-tertiary);color:var(--text-primary);outline:none;transition:border-color var(--transition)}.chat-input:focus{border-color:var(--accent-blue)}.chat-send-btn{padding:6px 12px;font-size:14px;border:none;border-radius:6px;background:var(--accent-blue);color:#fff;cursor:pointer;transition:opacity var(--transition);flex-shrink:0}.chat-send-btn:hover{opacity:.85}.chat-send-btn:disabled{opacity:.4;cursor:not-allowed}.chat-faq{padding:4px 16px 8px;font-size:11px}.chat-faq-title{color:var(--text-muted);margin-bottom:4px}.chat-faq-item{color:var(--accent-blue);cursor:pointer;padding:2px 0;font-size:12px}.chat-faq-item:hover{text-decoration:underline}