@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#101114;background:#e9f0f7;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-weight:400}*{box-sizing:border-box}html{scroll-behavior:smooth;min-width:320px;min-height:100%}body{min-width:320px;min-height:100vh;margin:0}button,a{-webkit-tap-highlight-color:transparent}button,input,textarea,select{font:inherit}::selection{color:#fff;background:#087f78}.landing-page{--landing-bg:#f2f6fc;--landing-surface:#fff;--landing-text:#101114;--landing-muted:#62676d;--landing-border:#e0e5eb;--ftaxai-teal:#087f78;--ftaxai-teal-dark:#066b65;min-height:100vh;color:var(--landing-text);background:var(--landing-bg);transition:color .18s,background .18s}.landing-page.dark-theme{--landing-bg:#111827;--landing-surface:#1f2937;--landing-text:#f9fafb;--landing-muted:#c1c9d4;--landing-border:#374151;--ftaxai-teal:#14b8a6;--ftaxai-teal-dark:#0d9488}.site-header{z-index:10;grid-template-columns:minmax(180px,1fr) auto minmax(250px,1fr);align-items:center;gap:24px;width:100%;padding:18px clamp(24px,7vw,112px);display:grid;position:absolute;top:0;left:0}.brand{width:fit-content;color:var(--landing-text);align-items:center;gap:10px;text-decoration:none;display:inline-flex}.brand-logo{object-fit:contain;flex-shrink:0;width:44px;height:44px;display:block}.brand-name{letter-spacing:-.04em;font-size:20px;font-weight:750}.main-nav{white-space:nowrap;justify-content:center;align-items:center;gap:clamp(18px,3vw,40px);display:flex}.main-nav a{color:var(--landing-muted);font-size:14px;text-decoration:none}.main-nav a:hover,.text-link:hover{color:var(--ftaxai-teal)}.header-actions{justify-content:flex-end;align-items:center;gap:10px;display:flex}.button{white-space:nowrap;cursor:pointer;border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:10px;min-height:42px;padding:0 18px;font-family:inherit;font-size:13px;font-weight:650;text-decoration:none;transition:background .16s,color .16s,border-color .16s,transform .16s;display:inline-flex}.button:hover{transform:translateY(-1px)}.button-outline{color:var(--ftaxai-teal);border-color:var(--ftaxai-teal);background:0 0}.button-outline:hover{background:var(--landing-surface)}.button-primary{color:#fff;background:var(--ftaxai-teal)}.button-primary:hover{background:var(--ftaxai-teal-dark)}.button-large{min-height:48px;padding:0 24px;font-size:14px}.theme-toggle,.menu-toggle{border:1px solid 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h2{font-size:25px}}.chat-layout-root{--chat-primary:#087f78;--chat-primary-hover:#066b65;--chat-primary-light:#e6f6f5;--chat-primary-text:#05504c;--chat-bg:#f8fafc;--chat-surface:#fff;--chat-surface-subtle:#f1f5f9;--chat-surface-hover:#e2e8f0;--chat-text:#0f172a;--chat-text-muted:#64748b;--chat-text-light:#94a3b8;--chat-border:#e2e8f0;--chat-border-subtle:#edf2f7;--chat-sidebar-width:270px;--chat-sidebar-collapsed-width:68px;--chat-citations-width:360px;--chat-header-height:60px;--chat-result-bg:#ecfdf5;--chat-result-border:#a7f3d0;--chat-result-text:#065f46;--chat-badge-user-bg:#d1fae5;--chat-badge-user-text:#065f46;--chat-shadow-sm:0 1px 3px #0000000d;--chat-shadow-md:0 4px 12px #0000000f;--chat-shadow-lg:0 10px 25px -3px #00000014;background-color:var(--chat-bg);width:100vw;height:100vh;color:var(--chat-text);font-family:inherit;transition:background-color .2s,color .2s;display:flex;overflow:hidden}.chat-layout-root.dark-theme{--chat-primary:#14b8a6;--chat-primary-hover:#0d9488;--chat-primary-light:#14b8a626;--chat-primary-text:#5eead4;--chat-bg:#0b1120;--chat-surface:#1e293b;--chat-surface-subtle:#162032;--chat-surface-hover:#26354a;--chat-text:#f8fafc;--chat-text-muted:#94a3b8;--chat-text-light:#64748b;--chat-border:#2b394e;--chat-border-subtle:#1e293b;--chat-result-bg:#10b9811f;--chat-result-border:#059669;--chat-result-text:#6ee7b7;--chat-badge-user-bg:#14b8a640;--chat-badge-user-text:#5eead4;--chat-shadow-sm:0 1px 3px #0006;--chat-shadow-md:0 4px 12px #00000059;--chat-shadow-lg:0 10px 25px -3px #00000073}.truncate{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.text-teal{color:var(--chat-primary)!important}.chat-sidebar-backdrop{z-index:45;background-color:#00000073;position:fixed;inset:0}.chat-sidebar{width:var(--chat-sidebar-width);background-color:var(--chat-surface-subtle);border-right:1px solid var(--chat-border);z-index:40;flex-direction:column;flex-shrink:0;height:100%;transition:width .25s cubic-bezier(.4,0,.2,1);display:flex}.chat-sidebar.is-collapsed{width:var(--chat-sidebar-collapsed-width)}.sidebar-header{height:var(--chat-header-height);border-bottom:1px solid var(--chat-border-subtle);justify-content:space-between;align-items:center;padding:0 14px;display:flex}.sidebar-brand{align-items:center;gap:10px;display:flex}.brand-logo-img{object-fit:contain;width:32px;height:32px}.brand-title{letter-spacing:-.02em;color:var(--chat-text);font-size:18px;font-weight:700}.sidebar-header-actions{align-items:center;gap:4px;display:flex}.sidebar-icon-btn{width:32px;height:32px;color:var(--chat-text-muted);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;transition:all .15s;display:inline-flex}.sidebar-icon-btn:hover{background-color:var(--chat-surface-hover);color:var(--chat-text)}.sidebar-new-chat-wrap{padding:12px 12px 6px}.sidebar-new-chat-btn{border:1px solid var(--chat-border);background-color:var(--chat-surface);width:100%;color:var(--chat-text);cursor:pointer;box-shadow:var(--chat-shadow-sm);border-radius:10px;justify-content:center;align-items:center;gap:10px;padding:10px 14px;font-size:14px;font-weight:600;transition:all .15s;display:flex}.sidebar-new-chat-btn:hover{border-color:var(--chat-primary);color:var(--chat-primary);background-color:var(--chat-primary-light)}.is-collapsed .sidebar-new-chat-btn{padding:10px}.sidebar-search-box{background-color:var(--chat-surface);border:1px solid var(--chat-border);border-radius:8px;align-items:center;gap:8px;margin:6px 12px 10px;padding:7px 10px;display:flex}.search-box-icon{color:var(--chat-text-muted);flex-shrink:0}.search-box-input{width:100%;color:var(--chat-text);background:0 0;border:none;outline:none;font-size:13px}.search-box-input::placeholder{color:var(--chat-text-light)}.clear-search-btn{color:var(--chat-text-muted);cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:0;display:flex}.sidebar-scroll-content{flex:1;padding:6px 8px;overflow:hidden auto}.sidebar-scroll-content::-webkit-scrollbar{width:5px}.sidebar-scroll-content::-webkit-scrollbar-thumb{background:var(--chat-border);border-radius:10px}.sidebar-section{margin-bottom:14px}.sidebar-section-header{justify-content:space-between;align-items:center;padding:4px 8px;display:flex}.sidebar-section-title{text-transform:uppercase;letter-spacing:.05em;color:var(--chat-text-light);padding:4px 8px;font-size:11px;font-weight:700}.sidebar-mini-action-btn{width:22px;height:22px;color:var(--chat-text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;display:flex}.sidebar-mini-action-btn:hover{background-color:var(--chat-surface-hover);color:var(--chat-text)}.sidebar-menu-list{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.sidebar-menu-link{width:100%;color:var(--chat-text);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:8px;align-items:center;gap:10px;padding:8px 10px;font-size:13.5px;font-weight:500;text-decoration:none;transition:all .15s;display:flex}.sidebar-menu-link:hover{background-color:var(--chat-surface-hover)}.sidebar-icon{color:var(--chat-text-muted);flex-shrink:0}.is-collapsed .sidebar-menu-link{justify-content:center;padding:10px}.history-group-title{color:var(--chat-text-light);padding:8px 10px 4px;font-size:11px;font-weight:600}.history-item.is-active{background-color:var(--chat-primary-light);color:var(--chat-primary);font-weight:600}.history-item.is-active .sidebar-icon{color:var(--chat-primary)}.sidebar-empty-state{text-align:center;padding:16px 10px}.sidebar-empty-state .empty-title{color:var(--chat-text-muted);margin:0 0 4px;font-size:13px;font-weight:600}.sidebar-empty-state .empty-desc{color:var(--chat-text-light);margin:0;font-size:12px}.sidebar-footer{border-top:1px solid var(--chat-border-subtle);flex-direction:column;gap:10px;padding:10px;display:flex}.sidebar-upgrade-banner{cursor:pointer;background:linear-gradient(135deg,#087f781f,#14b8a62e);border:1px solid #087f7840;border-radius:10px;align-items:center;gap:10px;padding:9px 12px;display:flex}.banner-icon-wrap{background-color:var(--chat-primary);color:#fff;border-radius:7px;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;display:flex}.banner-text-wrap{flex-direction:column;display:flex}.banner-title{color:var(--chat-text);font-size:12.5px;font-weight:700}.banner-desc{color:var(--chat-text-muted);font-size:11px}.sidebar-user-card{border-radius:8px;align-items:center;gap:10px;padding:6px;display:flex}.user-avatar{color:#fff;background:linear-gradient(135deg,#087f78,#0ea5e9);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:13px;font-weight:700;display:flex}.user-info{flex-direction:column;flex:1;display:flex}.user-name{color:var(--chat-text);font-size:13px;font-weight:600}.user-plan{color:var(--chat-text-muted);font-size:11px}.theme-toggle-btn{width:32px;height:32px;color:var(--chat-text-muted);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;transition:all .15s;display:flex}.theme-toggle-btn:hover{background-color:var(--chat-surface-hover);color:var(--chat-text)}.chat-main-container{background-color:var(--chat-surface);flex-direction:column;flex:1;min-width:0;height:100%;display:flex;position:relative}.chat-top-header{height:var(--chat-header-height);border-bottom:1px solid var(--chat-border);background-color:var(--chat-surface);z-index:10;flex-shrink:0;justify-content:space-between;align-items:center;padding:0 18px;display:flex}.header-left-section,.header-right-section{align-items:center;gap:10px;display:flex}.mobile-menu-btn{display:none}.header-icon-btn{width:36px;height:36px;color:var(--chat-text-muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;transition:all 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