:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a25;--bg-glass: rgba(255, 255, 255, .03);--bg-glass-hover: rgba(255, 255, 255, .06);--text-primary: #ffffff;--text-secondary: #a0a0b0;--text-muted: #6b6b7a;--accent-primary: #6366f1;--accent-secondary: #8b5cf6;--accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);--accent-glow: rgba(99, 102, 241, .4);--success: #22c55e;--warning: #f59e0b;--error: #ef4444;--border-color: rgba(255, 255, 255, .08);--border-color-hover: rgba(255, 255, 255, .15);--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--radius-sm: .375rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 20px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px var(--accent-glow);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .4s ease}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body:before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(99,102,241,.15),transparent),radial-gradient(ellipse 60% 40% at 100% 50%,rgba(139,92,246,.1),transparent),radial-gradient(ellipse 60% 40% at 0% 80%,rgba(168,85,247,.08),transparent);pointer-events:none;z-index:-1}#root{min-height:100vh;display:flex;flex-direction:column}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.2;letter-spacing:-.02em}h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:700}h2{font-size:clamp(1.5rem,4vw,2.5rem)}h3{font-size:clamp(1.25rem,3vw,1.75rem)}h4{font-size:1.25rem}p{color:var(--text-secondary);max-width:65ch}a{color:var(--accent-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-secondary)}.container{width:100%;max-width:1400px;margin:0 auto;padding:0 var(--space-lg)}.glass{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-color);border-radius:var(--radius-lg)}.glass:hover{background:var(--bg-glass-hover);border-color:var(--border-color-hover)}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);font-family:var(--font-sans);font-size:.9375rem;font-weight:500;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);text-decoration:none}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:var(--shadow-sm),0 0 20px var(--accent-glow)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-md),0 0 30px var(--accent-glow)}.btn-secondary{background:var(--bg-glass);color:var(--text-primary);border:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-secondary:hover{background:var(--bg-glass-hover);border-color:var(--border-color-hover)}.btn-icon{width:40px;height:40px;padding:0;border-radius:var(--radius-md)}.input{width:100%;padding:var(--space-md) var(--space-lg);font-family:var(--font-sans);font-size:1rem;color:var(--text-primary);background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-md);outline:none;transition:all var(--transition-fast)}.input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--accent-glow)}.input::placeholder{color:var(--text-muted)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color-hover);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.animate-fadeIn{animation:fadeIn .5s ease forwards}.animate-slideUp{animation:slideUp .6s ease forwards}.animate-pulse{animation:pulse 2s ease-in-out infinite}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-glass-hover) 50%,var(--bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm)}@media(max-width:768px){:root{--space-lg: 1rem;--space-xl: 1.5rem;--space-2xl: 2rem}.container{padding:0 var(--space-md)}}.home{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,#0d0d14,#0a0a12,#08080e);position:relative}.settings-btn{position:absolute;top:var(--space-lg);right:var(--space-lg);width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast)}.settings-btn:hover{background:#ffffff1a;color:var(--text-primary)}.settings-btn.saved{background:#22c55e33;border-color:#22c55e4d;color:var(--success)}.home-content{display:flex;flex-direction:column;align-items:center;text-align:center;padding:var(--space-lg);width:100%;max-width:640px}.logo-title{font-size:clamp(4rem,12vw,7rem);font-weight:800;letter-spacing:-.02em;margin-bottom:var(--space-sm);-webkit-user-select:none;user-select:none}.logo-title .c1{color:#4f8cff}.logo-title .c2{color:#6366f1}.logo-title .c3{color:#8b5cf6}.logo-title .c4{color:#a855f7}.logo-title .c5{color:#c026d3}.logo-title .c6{color:#db2777}.logo-title .c7{color:#e11d48}.logo-title .c8{color:#ef4444}.tagline{font-size:.875rem;font-weight:500;letter-spacing:.2em;color:var(--text-muted);margin-bottom:var(--space-2xl)}.search-form{width:100%;display:flex;flex-direction:column;align-items:center;gap:var(--space-lg)}.search-box{width:100%;position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:var(--space-lg);color:var(--text-muted);pointer-events:none}.search-input{width:100%;padding:var(--space-md) var(--space-lg);padding-left:52px;font-size:1rem;color:var(--text-primary);background:#ffffff0d;border:1px solid rgba(255,255,255,.12);border-radius:28px;outline:none;transition:all var(--transition-fast)}.search-input:focus{background:#ffffff14;border-color:#fff3}.search-input::placeholder{color:var(--text-muted)}.action-buttons{display:flex;gap:var(--space-md)}.btn-search,.btn-explore{padding:var(--space-sm) var(--space-lg);font-size:.875rem;font-weight:500;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);display:inline-flex;align-items:center;gap:var(--space-sm)}.btn-search{background:var(--accent-gradient);border:1px solid transparent;color:#fff}.btn-search:hover:not(:disabled){box-shadow:0 4px 20px var(--accent-glow)}.btn-search:disabled{opacity:.5;cursor:not-allowed}.btn-explore{background:#ffffff14;border:1px solid rgba(255,255,255,.15);color:var(--text-secondary)}.btn-explore:hover{background:#ffffff1f;color:var(--text-primary)}.paper-count{margin-top:var(--space-lg);font-size:.8125rem;color:var(--text-muted)}.modal-overlay{position:fixed;inset:0;background:#000000b3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:100;padding:var(--space-lg)}.modal{width:100%;max-width:400px;background:#1a1a24;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);overflow:hidden;animation:slideUp .25s ease}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);border-bottom:1px solid rgba(255,255,255,.08)}.modal-header h3{display:flex;align-items:center;gap:var(--space-sm);font-size:1rem;font-weight:600}.close-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:transparent;border:none;color:var(--text-muted);cursor:pointer;border-radius:var(--radius-sm);transition:all var(--transition-fast)}.close-btn:hover{background:#ffffff1a;color:var(--text-primary)}.modal-body{padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-md)}.modal-body label{font-size:.875rem;color:var(--text-secondary);font-weight:500}.modal-body .input{padding:var(--space-sm) var(--space-md);font-size:.9375rem;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);color:var(--text-primary);outline:none}.modal-body .input:focus{border-color:var(--accent-primary)}.hint{font-size:.8125rem;color:var(--text-muted)}.hint a{color:var(--accent-primary);display:inline-flex;align-items:center;gap:4px}.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);background:var(--accent-gradient);border:none;border-radius:var(--radius-md);color:#fff;font-weight:500;font-size:.9375rem;cursor:pointer;transition:all var(--transition-fast)}.btn-primary:hover{box-shadow:var(--shadow-glow)}.chat-view{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#0d0d14,#0a0a12)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);border-bottom:1px solid rgba(255,255,255,.08)}.back-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast)}.back-btn:hover{background:#ffffff1a;color:var(--text-primary)}.chat-logo{font-size:1.5rem;font-weight:800;letter-spacing:-.02em}.chat-logo .c1{color:#4f8cff}.chat-logo .c2{color:#6366f1}.chat-logo .c3{color:#8b5cf6}.chat-logo .c4{color:#a855f7}.chat-logo .c5{color:#c026d3}.chat-logo .c6{color:#db2777}.chat-logo .c7{color:#e11d48}.chat-logo .c8{color:#ef4444}.settings-btn-small{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:transparent;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast)}.settings-btn-small:hover{background:#ffffff0d}.settings-btn-small.saved{color:var(--success);border-color:#22c55e4d}.chat-messages{flex:1;overflow-y:auto;padding:var(--space-lg)}.message{display:flex;gap:var(--space-md);margin-bottom:var(--space-lg);max-width:800px;margin-left:auto;margin-right:auto;animation:fadeIn .3s ease}.message-avatar{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:#ffffff14;border-radius:var(--radius-md);font-size:.6875rem;font-weight:600;color:var(--text-secondary);flex-shrink:0}.message.assistant .message-avatar{background:var(--accent-gradient);color:#fff}.message-bubble{flex:1;padding:var(--space-md) var(--space-lg);background:#ffffff0a;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);border-top-left-radius:var(--radius-sm);line-height:1.7}.message.user .message-bubble{background:#6366f11a;border-color:#6366f133;border-top-left-radius:var(--radius-lg);border-top-right-radius:var(--radius-sm)}.message-bubble p{margin:0;color:var(--text-primary)}.message-bubble h1,.message-bubble h2,.message-bubble h3{margin:var(--space-md) 0 var(--space-sm);color:var(--text-primary)}.message-bubble h1:first-child,.message-bubble h2:first-child,.message-bubble h3:first-child{margin-top:0}.message-bubble ul,.message-bubble ol{margin:var(--space-sm) 0;padding-left:var(--space-lg);color:var(--text-secondary)}.message-bubble code{font-family:var(--font-mono);background:#ffffff1a;padding:2px 6px;border-radius:var(--radius-sm);font-size:.875em;color:#a78bfa}.message-bubble pre{background:#0000004d;padding:var(--space-md);border-radius:var(--radius-md);overflow-x:auto;margin:var(--space-md) 0}.message-bubble pre code{background:none;padding:0}.message-bubble.loading{display:flex;align-items:center;gap:var(--space-sm);color:var(--text-muted)}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.chat-footer{padding:var(--space-md) var(--space-lg) var(--space-lg);border-top:1px solid rgba(255,255,255,.08)}.chat-form{display:flex;gap:var(--space-md);max-width:800px;margin:0 auto}.chat-input{flex:1;padding:var(--space-md) var(--space-lg);font-size:1rem;color:var(--text-primary);background:#ffffff0d;border:1px solid rgba(255,255,255,.1);border-radius:24px;outline:none;transition:all var(--transition-fast)}.chat-input:focus{background:#ffffff14;border-color:#fff3}.chat-input::placeholder{color:var(--text-muted)}.send-btn{width:48px;height:48px;display:flex;align-items:center;justify-content:center;background:var(--accent-gradient);border:none;border-radius:50%;color:#fff;cursor:pointer;transition:all var(--transition-fast)}.send-btn:hover:not(:disabled){transform:scale(1.05);box-shadow:var(--shadow-glow)}.send-btn:disabled{opacity:.4;cursor:not-allowed}.error-toast{position:fixed;bottom:var(--space-xl);left:50%;transform:translate(-50%);display:flex;align-items:center;gap:var(--space-md);padding:var(--space-sm) var(--space-md);background:#ef444426;border:1px solid rgba(239,68,68,.25);border-radius:var(--radius-md);color:#f87171;font-size:.875rem;z-index:50;animation:slideUp .2s ease}.error-toast button{background:none;border:none;color:#f87171;cursor:pointer;display:flex;padding:4px}@media(max-width:640px){.logo-title{font-size:3.5rem}.action-buttons{flex-direction:column;width:100%}.btn-search,.btn-explore{width:100%;justify-content:center}.chat-messages{padding:var(--space-md)}.message{gap:var(--space-sm)}.message-avatar{width:28px;height:28px}.message-bubble{padding:var(--space-sm) var(--space-md)}.papers-grid{grid-template-columns:1fr}.paper-article{padding:var(--space-md)}}.paper-list-view{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#0d0d14,#0a0a12)}.paper-list-header{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-bottom:1px solid rgba(255,255,255,.08)}.paper-list-header h1{font-size:1.25rem;font-weight:600;flex:1}.paper-count-badge{padding:var(--space-xs) var(--space-sm);background:var(--accent-gradient);border-radius:var(--radius-full);font-size:.75rem;font-weight:500;color:#fff}.paper-list-content{flex:1;overflow-y:auto;padding:var(--space-lg)}.papers-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:var(--space-lg);max-width:1200px;margin:0 auto}.paper-card{background:#ffffff08;border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);padding:var(--space-lg);cursor:pointer;transition:all var(--transition-base)}.paper-card:hover{background:#ffffff0f;border-color:#6366f14d;transform:translateY(-2px)}.paper-card-category{display:inline-block;padding:var(--space-xs) var(--space-sm);background:#6366f126;border-radius:var(--radius-sm);font-size:.75rem;font-weight:500;color:var(--accent-primary);margin-bottom:var(--space-md)}.paper-card-title{font-size:1.125rem;font-weight:600;margin-bottom:var(--space-sm);line-height:1.4;color:var(--text-primary)}.paper-card-authors{display:flex;align-items:center;gap:var(--space-xs);font-size:.8125rem;color:var(--text-muted);margin-bottom:var(--space-md)}.paper-card-abstract{font-size:.875rem;color:var(--text-secondary);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--space-md)}.paper-card-meta{display:flex;flex-wrap:wrap;gap:var(--space-md);font-size:.75rem;color:var(--text-muted);margin-bottom:var(--space-md)}.paper-card-meta span{display:flex;align-items:center;gap:var(--space-xs)}.read-more-btn{display:inline-flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:transparent;border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-md);color:var(--text-secondary);font-size:.8125rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.read-more-btn:hover{background:var(--accent-gradient);border-color:transparent;color:#fff}.paper-viewer{min-height:100vh;display:flex;flex-direction:column;background:linear-gradient(180deg,#0d0d14,#0a0a12)}.paper-header{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border-bottom:1px solid rgba(255,255,255,.08)}.paper-title-header{flex:1;font-size:1rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ask-btn{display:inline-flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:var(--accent-gradient);border:none;border-radius:var(--radius-md);color:#fff;font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.ask-btn:hover{box-shadow:var(--shadow-glow)}.paper-content{flex:1;overflow-y:auto;padding:var(--space-lg)}.paper-article{max-width:800px;margin:0 auto;background:#ffffff05;border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:var(--space-2xl);line-height:1.8}.paper-article h1{font-size:2rem;font-weight:700;margin-bottom:var(--space-lg);background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.paper-article h2{font-size:1.5rem;font-weight:600;margin-top:var(--space-2xl);margin-bottom:var(--space-md);color:var(--text-primary);padding-bottom:var(--space-sm);border-bottom:1px solid rgba(255,255,255,.1)}.paper-article h3{font-size:1.25rem;font-weight:600;margin-top:var(--space-lg);margin-bottom:var(--space-sm);color:var(--text-primary)}.paper-article p{margin-bottom:var(--space-md);color:var(--text-secondary)}.paper-article strong{color:var(--text-primary)}.paper-article hr{border:none;border-top:1px solid rgba(255,255,255,.1);margin:var(--space-lg) 0}.paper-article ul,.paper-article ol{margin:var(--space-md) 0;padding-left:var(--space-lg);color:var(--text-secondary)}.paper-article li{margin:var(--space-sm) 0}.paper-article code{font-family:var(--font-mono);background:#ffffff1a;padding:2px 6px;border-radius:var(--radius-sm);color:#a78bfa;font-size:.875em}.paper-article pre{background:#0006;padding:var(--space-md);border-radius:var(--radius-md);overflow-x:auto;margin:var(--space-md) 0}.paper-article pre code{background:none;padding:0}.paper-article blockquote{border-left:3px solid var(--accent-primary);padding-left:var(--space-md);margin:var(--space-md) 0;color:var(--text-muted);font-style:italic}.app{min-height:100vh;display:flex;flex-direction:column}