*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #f7f8fc;--bg-secondary: #ffffff;--bg-tertiary: #f0f2f8;--bg-elevated: #e8ecf4;--bg-hover: #edf0f7;--bg-app: linear-gradient(135deg, #f7f8fc 0%, #eef1f9 50%, #f4f2fd 100%);--glass-bg: rgba(255, 255, 255, .72);--glass-border: rgba(99, 102, 241, .12);--glass-shadow: 0 4px 24px rgba(99, 102, 241, .08);--glass-blur: blur(20px);--accent-primary: #6366f1;--accent-secondary: #8b5cf6;--accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6);--accent-glow: 0 4px 16px rgba(99, 102, 241, .25);--accent-soft: rgba(99, 102, 241, .08);--text-primary: #1a1a2e;--text-secondary: #4a4a6a;--text-muted: #8890a4;--text-accent: #6366f1;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--info: #3b82f6;--border-subtle: rgba(99, 102, 241, .08);--border-medium: rgba(99, 102, 241, .16);--border-strong: rgba(99, 102, 241, .28);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;--sidebar-width: 280px;--panel-gap: 1px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s cubic-bezier(.4, 0, .2, 1)}html,body{height:100%;font-family:var(--font-sans);background:var(--bg-app);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden}#root{height:100%}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-medium);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}h1,h2,h3,h4{color:var(--text-primary);font-weight:700;letter-spacing:-.02em;line-height:1.3}h1{font-size:1.75rem}h2{font-size:1.35rem}h3{font-size:1.1rem}h4{font-size:.95rem}a{color:var(--accent-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-secondary)}code,pre{font-family:var(--font-mono);font-size:.85rem}.app-shell{display:flex;height:100vh;background:var(--bg-primary)}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--border-subtle);display:flex;flex-direction:column;flex-shrink:0;position:relative;z-index:10}.sidebar-header{padding:20px 16px;border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;gap:12px}.sidebar-logo{width:36px;height:36px;background:var(--accent-gradient);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff;box-shadow:var(--accent-glow)}.sidebar-title{font-size:1rem;font-weight:700;color:var(--text-primary);letter-spacing:-.01em}.sidebar-subtitle{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.sidebar-content{flex:1;overflow-y:auto;padding:8px}.sidebar-section-label{font-size:.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;padding:16px 12px 6px;font-weight:600}.sidebar-footer{padding:12px 16px;border-top:1px solid var(--border-subtle)}.sidebar-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);color:var(--text-secondary);font-size:.875rem;border:none;background:none;width:100%;text-align:left}.sidebar-item:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-item.active{background:var(--accent-soft);color:var(--accent-primary)}.sidebar-item-icon{width:18px;height:18px;flex-shrink:0;opacity:.7}.sidebar-item.active .sidebar-item-icon{opacity:1}.sidebar-item-label{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-item-badge{font-size:.7rem;background:var(--bg-elevated);color:var(--text-muted);padding:2px 6px;border-radius:10px}.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}.notebook-layout{display:flex;flex:1;overflow:hidden}.panel{display:flex;flex-direction:column;overflow:hidden;background:var(--bg-secondary)}.panel-left{width:280px;border-right:1px solid var(--border-subtle);flex-shrink:0}.panel-center{flex:1;min-width:0;background:var(--bg-primary);display:flex;flex-direction:column;overflow:hidden}.panel-right{width:380px;border-left:1px solid var(--border-subtle);flex-shrink:0}.panel-header{padding:16px 20px;border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between;gap:8px;flex-shrink:0;background:var(--bg-secondary)}.panel-header-title{font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted)}.panel-body{flex:1;overflow-y:auto;padding:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 18px;border-radius:var(--radius-md);font-size:.85rem;font-weight:500;cursor:pointer;border:none;transition:all var(--transition-fast);white-space:nowrap;font-family:var(--font-sans)}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:var(--accent-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px #6366f159}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border-medium)}.btn-secondary:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--border-strong)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:6px 10px}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-icon{padding:6px;width:34px;height:34px;border-radius:var(--radius-sm)}.btn-sm{padding:6px 12px;font-size:.78rem}.btn-danger{background:#ef444414;color:var(--error);border:1px solid rgba(239,68,68,.15)}.btn-danger:hover{background:#ef444426}.card{background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-lg);box-shadow:var(--glass-shadow);overflow:hidden}.card-body{padding:20px}.card-header{padding:16px 20px;border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between}.input{width:100%;padding:10px 14px;background:var(--bg-primary);border:1px solid var(--border-medium);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);font-size:.875rem;transition:all var(--transition-fast);outline:none}.input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f11f}.input::placeholder{color:var(--text-muted)}textarea.input{resize:vertical;min-height:80px}select.input{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238890a4' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}.chat-container{display:flex;flex-direction:column;flex:1;min-height:0}.chat-messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:20px}.chat-message{max-width:80%;animation:msgSlide .3s ease}@keyframes msgSlide{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.chat-message-user{align-self:flex-end}.chat-message-assistant{align-self:flex-start}.chat-bubble{padding:14px 18px;border-radius:var(--radius-lg);font-size:.9rem;line-height:1.65}.chat-message-user .chat-bubble{background:var(--accent-gradient);color:#fff;border-bottom-right-radius:6px;box-shadow:0 2px 12px #6366f133}.chat-message-assistant .chat-bubble{background:var(--bg-secondary);border:1px solid var(--border-subtle);color:var(--text-primary);border-bottom-left-radius:6px;box-shadow:0 1px 6px #0000000a}.chat-label{font-size:.7rem;color:var(--text-muted);margin-bottom:4px;padding:0 4px;font-weight:500}.chat-input-area{padding:16px 24px 20px;border-top:1px solid var(--border-subtle);display:flex;gap:10px;align-items:flex-end;background:var(--bg-secondary)}.chat-textarea{flex:1;padding:12px 16px;background:var(--bg-primary);border:1.5px solid var(--border-medium);border-radius:var(--radius-xl);color:var(--text-primary);font-family:var(--font-sans);font-size:.875rem;resize:none;outline:none;max-height:120px;min-height:44px;line-height:1.5;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.chat-textarea:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #6366f11a}.chat-textarea::placeholder{color:var(--text-muted)}.typing-indicator{display:flex;gap:5px;padding:14px 18px}.typing-dot{width:8px;height:8px;background:var(--accent-primary);border-radius:50%;animation:typing 1.4s infinite;opacity:.4}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-5px)}}.streaming-cursor{display:inline-block;animation:blink-cursor 1s step-end infinite;color:var(--accent-primary);font-weight:700;margin-left:2px}@keyframes blink-cursor{0%,to{opacity:1}50%{opacity:0}}.spin-slow{animation:spin-slow 2s linear infinite}@keyframes spin-slow{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.source-icon-youtube{background:linear-gradient(135deg,red,#c00);color:#fff}.source-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:1px solid transparent}.source-item:hover{background:var(--bg-hover)}.source-item.active{background:var(--accent-soft);border-color:var(--border-medium)}.source-item.source-unchecked{opacity:.45}.source-filter-bar{border-bottom:1px solid var(--border-subtle);margin-bottom:4px}.source-icon{width:38px;height:38px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}.source-icon-pdf{background:#ef44441a;color:var(--error)}.source-icon-url{background:#3b82f61a;color:var(--info)}.source-icon-text{background:#10b9811a;color:var(--success)}.source-icon-bopi{background:#f59e0b1a;color:var(--warning)}.source-info{flex:1;min-width:0}.source-title{font-size:.82rem;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.source-meta{font-size:.7rem;color:var(--text-muted)}.pdf-viewer{padding:16px;display:flex;flex-direction:column;gap:12px}.pdf-page-nav{display:flex;align-items:center;justify-content:center;gap:12px}.pdf-page-image{width:100%;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:#fff;box-shadow:0 2px 8px #0000000f}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#1a1a2e59;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);width:90%;max-width:600px;max-height:85vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 24px 64px #6366f11f,0 8px 24px #00000014;animation:modalSlide .3s ease}@keyframes modalSlide{0%{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border-subtle);display:flex;align-items:center;justify-content:space-between}.modal-title{font-size:1.1rem;font-weight:600;color:var(--text-primary)}.modal-body{padding:20px 24px;overflow-y:auto;flex:1}.modal-footer{padding:16px 24px;border-top:1px solid var(--border-subtle);display:flex;justify-content:flex-end;gap:8px}.studio-tabs{display:flex;gap:4px;padding:10px 12px;border-bottom:1px solid var(--border-subtle);background:var(--bg-secondary);flex-shrink:0;align-items:center}.studio-tab{padding:8px 16px;border-radius:var(--radius-sm);font-size:.82rem;font-weight:500;cursor:pointer;background:none;border:none;color:var(--text-muted);transition:all var(--transition-fast);font-family:var(--font-sans)}.studio-tab:hover{background:var(--bg-hover);color:var(--text-primary)}.studio-tab.active{background:var(--accent-soft);color:var(--accent-primary);font-weight:600}.studio-output{padding:28px;line-height:1.8}.studio-output h1,.studio-output h2,.studio-output h3{margin-top:24px;margin-bottom:12px}.studio-output p{margin-bottom:12px;color:var(--text-secondary)}.studio-output ul,.studio-output ol{margin-bottom:12px;padding-left:24px}.studio-output li{margin-bottom:6px;color:var(--text-secondary)}.studio-output table{width:100%;border-collapse:collapse;margin:16px 0}.studio-output th,.studio-output td{padding:10px 14px;border:1px solid var(--border-subtle);text-align:left;font-size:.85rem}.studio-output th{background:var(--bg-tertiary);color:var(--text-primary);font-weight:600}.studio-output code{background:var(--bg-tertiary);padding:2px 6px;border-radius:4px;font-size:.83rem;color:var(--accent-primary)}.studio-output pre{background:var(--bg-tertiary);padding:16px;border-radius:var(--radius-md);overflow-x:auto;margin:12px 0;border:1px solid var(--border-subtle)}.studio-output strong{color:var(--text-primary);font-weight:600}.home-layout{display:flex;flex-direction:column;height:100%;overflow-y:auto;background:var(--bg-app)}.home-nav{display:flex;align-items:center;justify-content:space-between;padding:16px 32px;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:20}.home-nav-brand{display:flex;align-items:center;gap:12px}.home-nav-logo{width:38px;height:38px;background:var(--accent-gradient);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;box-shadow:var(--accent-glow)}.home-nav-name{font-size:1.15rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.home-nav-tag{font-size:.65rem;font-weight:600;color:var(--accent-primary);background:var(--accent-soft);padding:2px 8px;border-radius:100px;text-transform:uppercase;letter-spacing:.05em}.home-hero{text-align:center;padding:56px 32px 24px;position:relative}.home-hero h1{font-size:2.2rem;font-weight:800;letter-spacing:-.03em;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:10px}.home-hero p{color:var(--text-secondary);font-size:1rem;max-width:480px;margin:0 auto;line-height:1.6}.home-search{max-width:520px;margin:24px auto 32px;position:relative}.home-search-icon{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}.home-search input{width:100%;padding:13px 16px 13px 44px;background:var(--bg-secondary);border:1.5px solid var(--border-medium);border-radius:var(--radius-xl);font-family:var(--font-sans);font-size:.9rem;color:var(--text-primary);outline:none;transition:all var(--transition-fast);box-shadow:0 2px 12px #00000008}.home-search input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 4px #6366f11a,0 2px 12px #00000008}.home-search input::placeholder{color:var(--text-muted)}.home-header{text-align:center;margin-bottom:0}.home-header h1{font-size:2.2rem;font-weight:800;background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.home-header p{color:var(--text-secondary);font-size:.95rem}.notebooks-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;max-width:1100px;margin:0 auto;width:100%;padding:0 32px 48px}.notebook-card{background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-lg);padding:22px;cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden}.notebook-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent-gradient);opacity:0;transition:opacity var(--transition-fast)}.notebook-card:hover{transform:translateY(-3px);border-color:var(--border-medium);box-shadow:0 12px 40px #6366f11a,0 4px 12px #0000000a}.notebook-card:hover:before{opacity:1}.notebook-card-icon{font-size:2rem;margin-bottom:14px}.notebook-card-title{font-size:1rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}.notebook-card-meta{font-size:.78rem;color:var(--text-muted);display:flex;align-items:center}.notebook-card-new{border:2px dashed var(--border-medium);background:transparent;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);gap:10px;min-height:150px;-webkit-backdrop-filter:none;backdrop-filter:none}.notebook-card-new:hover{border-color:var(--accent-primary);color:var(--accent-primary);background:var(--accent-soft)}.home-footer{text-align:center;padding:24px;font-size:.75rem;color:var(--text-muted);letter-spacing:.02em}.home-footer span{color:var(--accent-primary);font-weight:500}.add-source-tabs{display:flex;gap:4px;margin-bottom:20px;background:var(--bg-tertiary);border-radius:var(--radius-md);padding:4px}.add-source-tab{flex:1;padding:10px;text-align:center;font-size:.8rem;font-weight:500;border-radius:var(--radius-sm);background:transparent;color:var(--text-secondary);border:none;cursor:pointer;transition:all var(--transition-fast);font-family:var(--font-sans)}.add-source-tab:hover{color:var(--text-primary)}.add-source-tab.active{background:var(--bg-secondary);color:var(--accent-primary);box-shadow:0 1px 4px #0000000f;font-weight:600}.form-group{margin-bottom:16px}.form-label{display:block;font-size:.78rem;font-weight:600;color:var(--text-secondary);margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}.file-drop{border:2px dashed var(--border-medium);border-radius:var(--radius-lg);padding:36px;text-align:center;color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast);background:var(--bg-primary)}.file-drop:hover,.file-drop.dragover{border-color:var(--accent-primary);color:var(--accent-primary);background:var(--accent-soft)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;color:var(--text-muted);gap:12px;text-align:center}.empty-state-icon{font-size:2.8rem;opacity:.5}.empty-state-title{font-size:1rem;font-weight:600;color:var(--text-secondary)}.empty-state p{font-size:.83rem;max-width:320px;line-height:1.5}.loading-spinner{width:24px;height:24px;border:2.5px solid var(--border-medium);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-center{display:flex;align-items:center;justify-content:center;flex:1;gap:12px;color:var(--text-secondary);font-size:.85rem}.markdown-content{line-height:1.8;color:var(--text-primary);word-wrap:break-word;overflow-wrap:break-word}.markdown-content h1{font-size:1.4rem;font-weight:700;margin:20px 0 10px;color:var(--text-primary);border-bottom:1px solid var(--border-subtle);padding-bottom:6px}.markdown-content h2{font-size:1.2rem;font-weight:600;margin:18px 0 8px;color:var(--text-primary)}.markdown-content h3{font-size:1.05rem;font-weight:600;margin:14px 0 6px;color:var(--text-primary)}.markdown-content p{margin-bottom:10px;color:var(--text-secondary)}.markdown-content strong{color:var(--text-primary);font-weight:600}.markdown-content em{color:var(--accent-primary);font-style:italic}.markdown-content ul,.markdown-content ol{padding-left:20px;margin-bottom:10px}.markdown-content li{margin-bottom:4px;color:var(--text-secondary)}.markdown-content li::marker{color:var(--accent-primary)}.markdown-content blockquote{border-left:3px solid var(--accent-primary);padding:10px 18px;margin:12px 0;background:var(--accent-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}.markdown-content hr{border:none;height:1px;background:var(--border-subtle);margin:20px 0}.markdown-content .table-wrapper{overflow-x:auto;margin:14px 0;border-radius:var(--radius-md);border:1px solid var(--border-subtle)}.markdown-content table{width:100%;border-collapse:collapse;font-size:.82rem;white-space:nowrap}.markdown-content thead{background:linear-gradient(135deg,#6366f11f,#a855f714)}.markdown-content th{padding:10px 14px;text-align:left;font-weight:600;color:var(--text-primary);border-bottom:2px solid var(--accent-primary);font-size:.78rem;text-transform:uppercase;letter-spacing:.03em}.markdown-content td{padding:8px 14px;border-bottom:1px solid var(--border-subtle);color:var(--text-secondary)}.markdown-content tbody tr:nth-child(2n){background:#6366f108}.markdown-content tbody tr:hover{background:#6366f10f}.markdown-content tbody tr:last-child td{border-bottom:none}.markdown-content pre{margin:14px 0;border-radius:var(--radius-md);overflow-x:auto;position:relative}.markdown-content pre code{display:block;padding:16px;background:#1e1e2e;border-radius:var(--radius-md);font-family:JetBrains Mono,Fira Code,Cascadia Code,Consolas,monospace;font-size:.82rem;line-height:1.6;color:#cdd6f4;overflow-x:auto;border:1px solid rgba(99,102,241,.15)}.markdown-content code{font-family:JetBrains Mono,Fira Code,Consolas,monospace;font-size:.82em;padding:2px 6px;border-radius:4px;background:#6366f11a;color:var(--accent-primary);border:1px solid rgba(99,102,241,.12)}.markdown-content pre code{padding:16px;border:1px solid rgba(99,102,241,.15)}.markdown-content .hljs-keyword,.markdown-content .hljs-selector-tag{color:#cba6f7}.markdown-content .hljs-string,.markdown-content .hljs-addition{color:#a6e3a1}.markdown-content .hljs-number,.markdown-content .hljs-literal{color:#fab387}.markdown-content .hljs-comment{color:#6c7086;font-style:italic}.markdown-content .hljs-built_in,.markdown-content .hljs-type{color:#89dceb}.markdown-content .hljs-title,.markdown-content .hljs-function{color:#89b4fa}.markdown-content .hljs-attr,.markdown-content .hljs-attribute{color:#f9e2af}.markdown-content .hljs-variable{color:#f38ba8}.markdown-content .hljs-deletion{color:#f38ba8;background:#f38ba81a}.markdown-content .hljs-addition{background:#a6e3a11a}.mermaid-block{margin:16px 0;padding:20px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:var(--radius-md);text-align:center;overflow-x:auto}.mermaid-block svg{max-width:100%;height:auto}.markdown-content img{max-width:100%;height:auto;border-radius:var(--radius-md);margin:12px 0;border:1px solid var(--border-subtle)}.markdown-content a{color:var(--accent-primary);text-decoration:none;border-bottom:1px dotted var(--accent-primary);transition:all .2s}.markdown-content a:hover{color:var(--accent-secondary);border-bottom-style:solid}.bg-orbs{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:0;overflow:hidden}.bg-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.3;animation:orbFloat 20s ease-in-out infinite}.bg-orb-1{width:500px;height:500px;background:#6366f126;top:-10%;right:-5%;animation-delay:0s}.bg-orb-2{width:400px;height:400px;background:#8b5cf61f;bottom:-10%;left:-5%;animation-delay:-7s}.bg-orb-3{width:300px;height:300px;background:#3b82f61a;top:40%;left:40%;animation-delay:-14s}@keyframes orbFloat{0%,to{transform:translate(0) scale(1)}25%{transform:translate(30px,-40px) scale(1.05)}50%{transform:translate(-20px,20px) scale(.95)}75%{transform:translate(15px,30px) scale(1.02)}}.quiz-container{padding:16px}.quiz-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.quiz-title{display:flex;align-items:center;gap:8px;font-weight:600;font-size:1rem;color:var(--text-primary)}.quiz-progress{height:6px;background:var(--bg-elevated);border-radius:3px;margin-bottom:6px;overflow:hidden}.quiz-progress-fill{height:100%;background:var(--accent-gradient);border-radius:3px;transition:width var(--transition-normal)}.quiz-score-label{font-size:.75rem;color:var(--text-muted);margin-bottom:20px}.quiz-questions{display:flex;flex-direction:column;gap:20px}.quiz-question{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:16px;transition:border-color var(--transition-fast)}.quiz-question.correct{border-color:var(--success);background:#10b9810a}.quiz-question.incorrect{border-color:var(--error);background:#ef44440a}.quiz-question-header{display:flex;align-items:flex-start;gap:10px;margin-bottom:12px}.quiz-question-number{flex-shrink:0;width:28px;height:28px;border-radius:50%;background:var(--accent-gradient);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700}.quiz-question-text{font-size:.92rem;font-weight:500;color:var(--text-primary);flex:1;line-height:1.5}.quiz-difficulty{font-size:.68rem;padding:2px 8px;border-radius:10px;font-weight:600;text-transform:uppercase;flex-shrink:0}.quiz-difficulty-basic{background:#10b9811f;color:var(--success)}.quiz-difficulty-analysis{background:#3b82f61f;color:var(--info)}.quiz-difficulty-synthesis{background:#8b5cf61f;color:var(--accent-secondary)}.quiz-options{display:flex;flex-direction:column;gap:6px}.quiz-option{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);background:var(--bg-primary);cursor:pointer;transition:all var(--transition-fast);text-align:left;width:100%;font-family:var(--font-sans);font-size:.85rem;color:var(--text-primary)}.quiz-option:hover:not(:disabled){border-color:var(--accent-primary);background:var(--accent-soft)}.quiz-option:disabled{cursor:default}.quiz-option-correct{border-color:var(--success)!important;background:#10b98114!important}.quiz-option-wrong{border-color:var(--error)!important;background:#ef444414!important}.quiz-option-letter{flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--bg-elevated);display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:700;color:var(--text-secondary)}.quiz-option-correct .quiz-option-letter{background:var(--success);color:#fff}.quiz-option-wrong .quiz-option-letter{background:var(--error);color:#fff}.quiz-option-text{flex:1}.quiz-option-icon{flex-shrink:0}.quiz-option-correct .quiz-option-icon{color:var(--success)}.quiz-option-wrong .quiz-option-icon{color:var(--error)}.quiz-explanation{margin-top:10px;padding:10px 14px;background:var(--accent-soft);border-radius:var(--radius-sm);font-size:.82rem;color:var(--text-secondary);line-height:1.5;border-left:3px solid var(--accent-primary)}.quiz-results{margin-top:24px;padding:24px;background:var(--accent-gradient);border-radius:var(--radius-lg);color:#fff;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}.quiz-results h3{font-size:1.3rem}.quiz-results .btn{margin-top:8px;background:#fff3;color:#fff;border:1px solid rgba(255,255,255,.3)}.quiz-results .btn:hover{background:#ffffff4d}.flashcards-container{padding:16px;display:flex;flex-direction:column;align-items:center}.flashcards-header{width:100%;display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.flashcards-counter{font-weight:600;font-size:.9rem;color:var(--text-primary)}.flashcards-progress{font-size:.78rem;color:var(--text-muted)}.flashcards-dots{display:flex;gap:4px;margin-bottom:20px;flex-wrap:wrap;justify-content:center}.flashcards-dot{width:8px;height:8px;border-radius:50%;background:var(--bg-elevated);cursor:pointer;transition:all var(--transition-fast)}.flashcards-dot.active{background:var(--accent-primary);transform:scale(1.4)}.flashcards-dot.known{background:var(--success)}.flashcard{width:100%;max-width:450px;height:280px;perspective:1000px;cursor:pointer;margin-bottom:20px}.flashcard-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.flashcard.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:var(--radius-lg);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px}.flashcard-front{background:var(--accent-gradient);color:#fff;box-shadow:var(--accent-glow)}.flashcard-back{background:var(--bg-secondary);border:2px solid var(--accent-primary);color:var(--text-primary);transform:rotateY(180deg)}.flashcard-label{font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;opacity:.7;margin-bottom:12px}.flashcard-content{font-size:1rem;line-height:1.5;font-weight:500;max-height:180px;overflow-y:auto}.flashcard-hint{position:absolute;bottom:12px;font-size:.72rem;opacity:.6}.flashcards-controls{display:flex;gap:12px;align-items:center}.flashcards-controls .btn{display:flex;align-items:center;gap:4px}.btn-success{background:#10b9811a;color:var(--success);border:1px solid rgba(16,185,129,.3)}.btn-success:hover{background:#10b98133}.studio-actions-bar{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding:10px 14px;background:var(--bg-elevated);border-radius:var(--radius-md);font-size:.78rem;color:var(--text-muted)}.studio-actions-bar .actions{display:flex;gap:8px;align-items:center}.source-summary{margin-top:12px;padding:12px;background:var(--accent-soft);border-radius:var(--radius-sm);font-size:.82rem;color:var(--text-secondary);line-height:1.5}.source-keywords{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px}.source-keyword{padding:2px 8px;background:var(--bg-elevated);border-radius:10px;font-size:.72rem;color:var(--text-accent);font-weight:500}.panel-tabs{display:flex;gap:2px;flex:1;justify-content:center}.panel-tab{background:none;border:none;padding:4px 12px;font-size:.72rem;font-weight:600;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);transition:all .2s;display:flex;align-items:center;gap:2px;text-transform:uppercase;letter-spacing:.04em}.panel-tab:hover{background:var(--bg-elevated);color:var(--text-primary)}.panel-tab.active{background:var(--accent-soft);color:var(--text-accent)}.panel-tab-badge{display:inline-flex;align-items:center;justify-content:center;min-width:16px;height:16px;padding:0 4px;font-size:.65rem;font-weight:700;background:var(--bg-elevated);border-radius:8px;color:var(--text-muted);margin-left:3px}.panel-tab.active .panel-tab-badge{background:var(--accent-primary);color:#fff}.note-editor{background:var(--bg-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:12px;margin-bottom:12px;display:flex;flex-direction:column;gap:8px}.note-editor-title{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:8px 10px;font-size:.82rem;font-weight:600;color:var(--text-primary);outline:none;transition:border-color .2s}.note-editor-title:focus{border-color:var(--accent-primary)}.note-editor-title::placeholder{color:var(--text-muted);font-weight:400}.note-editor-content{background:var(--bg-secondary);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:8px 10px;font-size:.78rem;color:var(--text-primary);outline:none;resize:vertical;min-height:80px;font-family:inherit;line-height:1.5;transition:border-color .2s}.note-editor-content:focus{border-color:var(--accent-primary)}.note-editor-content::placeholder{color:var(--text-muted)}.note-editor-actions{display:flex;gap:6px;justify-content:flex-end}