*{box-sizing:border-box}:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg-sidebar: #1a1b1e;--bg-main: #f8fafc;--bg-card: #ffffff;--sidebar-text: #94a3b8;--sidebar-active: #2c2e33;--sidebar-active-text: #ffffff;--border-color: #e2e8f0;--text-main: #1e293b;--text-muted: #64748b;--accent-purple: #8b5cf6;--primary-light: rgba(37, 99, 235, .1);--topbar-bg: #ffffff;--expo-out: cubic-bezier(.16, 1, .3, 1)}body.dark-theme{--bg-main: #0f172a;--bg-card: #1e293b;--border-color: #334155;--text-main: #f8fafc;--text-muted: #94a3b8;--topbar-bg: #0f172a;--bg-sidebar: #020617;--sidebar-active: #1e293b}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-main);color:var(--text-main);transition:background-color .3s,color .3s}::view-transition-group(root){animation-timing-function:cubic-bezier(.16,1,.3,1)}::view-transition-new(root){mask:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 40"><defs><filter id="blur"><feGaussianBlur stdDeviation="2"/></filter></defs><circle cx="0" cy="0" r="18" fill="white" filter="url(%23blur)"/></svg>') top left / 0 no-repeat;-webkit-mask-origin:content-box;mask-origin:content-box;animation:scale 1s;animation-fill-mode:both;transform-origin:top left}::view-transition-old(root),.dark-theme::view-transition-old(root){animation:scale 1s;animation-fill-mode:both;transform-origin:top left;z-index:-1}@keyframes scale{to{-webkit-mask-size:350vmax;mask-size:350vmax}}.app-container{display:flex;height:100vh}.sidebar{width:260px;background-color:var(--bg-sidebar);display:flex;flex-direction:column;padding:1.25rem;flex-shrink:0;color:var(--sidebar-text);transition:width .3s var(--expo-out),padding .3s var(--expo-out);overflow:hidden;position:relative;z-index:20}.sidebar.collapsed{width:0;padding:1.25rem 0;border-right:none}.hide-on-collapsed{white-space:nowrap;opacity:1;transition:opacity .2s ease}.sidebar.collapsed .hide-on-collapsed{opacity:0;pointer-events:none}.logo-container{display:flex;align-items:center;gap:.75rem;padding:.5rem;margin-bottom:2rem;color:#fff;font-weight:700;font-size:1.25rem}.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,#3b82f6,#8b5cf6);border-radius:8px}.new-chat-btn{background:linear-gradient(to right,#374151,#1f2937);color:#fff;border:1px solid #4b5563;padding:.75rem;border-radius:10px;font-weight:500;margin-bottom:2rem;cursor:pointer;transition:all .2s}.sidebar-nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;cursor:pointer;margin-bottom:4px;font-size:.9rem}.sidebar-nav-item:hover{background-color:#ffffff0d;color:#fff}.sidebar-nav-item.active{background-color:var(--sidebar-active);color:#fff}.sidebar-section-title{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;margin:1.5rem 0 .75rem .75rem;font-weight:600;color:#4b5563}.main-viewport{flex:1;display:flex;flex-direction:column;overflow:hidden;background-color:var(--bg-main)}.chat-input-container{padding:24px;background:var(--bg-main);border-top:1px solid var(--border-color)}.chat-input-wrapper{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:12px 16px;display:flex;align-items:center;gap:12px}.chat-input{flex:1;background:transparent;border:none;outline:none;font-size:.95rem;padding:8px 0;color:var(--text-main)}.chat-action-btn{background:var(--primary);color:#fff;border:none;width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;cursor:pointer}.suggestion-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;padding:20px}.article-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;padding:20px;transition:transform .2s,box-shadow .2s;cursor:pointer;color:var(--text-main)}.article-card:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000001a}.home-container{flex:1;display:flex;flex-direction:column;padding:4rem 2rem;max-width:1000px;margin:0 auto}.section-title{font-size:2.5rem;font-weight:800;color:var(--text-main);margin-bottom:2rem;letter-spacing:-.02em}.topic-input-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:20px;padding:1.5rem;box-shadow:0 4px 20px #0000000d;margin-bottom:2rem;transition:all .3s var(--expo-out);display:flex;flex-direction:column;gap:1rem}.topic-input-container:focus-within{border-color:var(--primary);box-shadow:0 8px 30px #2563eb1a;transform:translateY(-2px)}.topic-input-container select{background:var(--bg-card);color:var(--text-main);border:1px solid var(--border-color);outline:none}.topic-input{width:100%;border:none;font-size:2rem;font-weight:700;color:var(--text-main);background:transparent;outline:none;margin-bottom:1rem}.topic-input::placeholder{color:#cbd5e1}.input-footer{display:flex;justify-content:space-between;color:var(--text-muted);opacity:.5}.input-options-row{display:flex;align-items:center;justify-content:space-between;padding-top:1rem;border-top:1px solid var(--border-color)}.input-option-group{display:flex;align-items:center;gap:12px}.modern-select{background:var(--bg-main);border:1px solid var(--border-color);border-radius:8px;padding:6px 12px;font-size:.85rem;color:var(--text-main);outline:none;cursor:pointer;transition:all .2s}.modern-select:hover{border-color:var(--primary)}.modern-submit-btn{background:var(--primary);color:#fff;border:none;border-radius:12px;padding:8px 16px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:8px;transition:all .2s}.modern-submit-btn:hover:not(:disabled){background:var(--accent-blue);transform:scale(1.05)}.modern-submit-btn:disabled{opacity:.3;cursor:not-allowed}.progress-card{background:transparent;border:none;border-radius:0;padding:0;max-width:100%;margin:0;box-shadow:none}.panel-container{padding:2rem;max-width:1000px;margin:0 auto}.library-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.library-item{border-bottom:1px solid var(--border-color);padding:1.5rem 0;transition:background-color .2s;cursor:pointer}.library-item:hover{background-color:#f8fafc}.library-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}.library-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:16px;padding:24px;transition:all .3s var(--expo-out);cursor:pointer;display:flex;flex-direction:column;height:100%}.library-card:hover{transform:translateY(-4px);box-shadow:0 12px 20px -5px #0000001a}.card-header{display:flex;gap:8px;align-items:center;margin-bottom:12px}.card-year{background:#f1f5f9;padding:2px 8px;border-radius:6px;font-size:.75rem;font-weight:600;color:#64748b}.card-category{color:#94a3b8;font-size:.85rem}.card-title{font-size:1.25rem;font-weight:700;color:var(--text-main);margin-bottom:8px;line-height:1.3}.card-authors{font-size:.9rem;color:#64748b;line-height:1.4}.card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:24px}.card-stats{display:flex;align-items:center;gap:12px;color:#94a3b8;font-size:.85rem}.category-dot{width:8px;height:8px;border-radius:50%;margin-right:12px}.library-tab-nav{display:flex;gap:2rem;border-bottom:1px solid var(--border-color);margin-bottom:2rem}.library-tab{padding:.75rem 0;border:none;background:transparent;color:var(--text-muted);font-weight:500;cursor:pointer;border-bottom:2px solid transparent}.library-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.article-view-layout{display:flex;padding:2rem;gap:4rem;max-width:1400px;margin:0 auto}.article-toc{width:250px;position:sticky;top:100px;align-self:flex-start}.article-body{flex:1;line-height:1.6;color:#334155}.article-section{margin-bottom:3rem}.article-section h2{color:#0f172a;border-bottom:1px solid var(--border-color);padding-bottom:.5rem;margin-bottom:1.5rem;font-weight:700}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.spin-slow{animation:spin 3s linear infinite}@media print{body,.app-container{background:#fff!important;color:#000!important;height:auto!important;overflow:visible!important}.sidebar,.top-bar,.sticky-toolbar,.bubble-menu,button,.chat-input-container,.topic-input-container{display:none!important}.main-viewport,.outline-canvas{background:#fff!important;color:#000!important;width:100%!important;margin:0!important;padding:0!important;overflow:visible!important;display:block!important}.outline-canvas{font-size:12pt!important;line-height:1.5!important}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.spin-anim{animation:spin 1s linear infinite}:root{--text-main: #000000 !important;--bg-main: #ffffff !important}}