:root{color-scheme:light;--bg: #f6f7f5;--panel: #ffffff;--panel-soft: #f0f4f1;--ink: #18201b;--muted: #657168;--line: #dfe6e0;--accent: #24745b;--accent-strong: #155942;--accent-soft: #dff0e9;--danger: #b33a3a;--shadow: 0 18px 60px rgba(24, 32, 27, .1);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #0f1411;--panel: #161d18;--panel-soft: #1c2520;--ink: #ddeae0;--muted: #6b8472;--line: #253029;--accent: #3a9b78;--accent-strong: #5bbf99;--accent-soft: #172b22;--danger: #d96060;--shadow: 0 18px 60px rgba(0, 0, 0, .45)}:root[data-theme=dark] .sidebar{background:#111a14}:root[data-theme=dark] .project-panel{background:#ffffff0a}:root[data-theme=dark] .project-select,:root[data-theme=dark] .auth-form input,:root[data-theme=dark] .composer,:root[data-theme=dark] .model-select{background:var(--panel-soft);border-color:var(--line)}:root[data-theme=dark] .icon-button,:root[data-theme=dark] .mini-icon-button{background:#ffffff0d}:root[data-theme=dark] .search-box{background:#ffffff0a}:root[data-theme=dark] .session-item.active,:root[data-theme=dark] .session-item:hover{background:#ffffff12}:root[data-theme=dark] .token-pill{background:var(--panel-soft)}:root[data-theme=dark] .workspace-drawer{background:var(--panel-soft)}:root[data-theme=dark] .user-message .message-body{background:var(--panel-soft)}:root[data-theme=dark] .message-text code{background:#ffffff12;border-color:var(--line)}:root[data-theme=dark] .source-list a{background:var(--panel-soft)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button,input,textarea,select{font:inherit}button{cursor:pointer}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(120deg,#24745b1f,#4466921a),var(--bg)}.auth-panel{width:min(440px,100%);background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:28px}.brand-lockup,.sidebar-top,.profile-row,.chat-header,.header-controls,.token-summary,.message,.message-tokens,.status-banner,.composer-error,.ready-chip{display:flex;align-items:center}.brand-lockup{gap:14px;margin-bottom:24px}.brand-mark,.avatar,.message-avatar{display:grid;place-items:center;color:var(--accent-strong);background:var(--accent-soft)}.brand-mark{width:46px;height:46px;border-radius:8px}h1,h2,p{margin:0}.brand-lockup h1,.chat-header h1{font-size:20px;line-height:1.2}.brand-lockup p,.chat-header p,.profile-row small,.session-item small,.empty-chat p{color:var(--muted)}.segmented{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;border:1px solid var(--line);background:var(--panel-soft);border-radius:8px;margin-bottom:18px}.segmented button{border:0;background:transparent;border-radius:6px;padding:10px 12px;color:var(--muted)}.segmented button.active{background:var(--panel);color:var(--ink);box-shadow:0 1px 4px #18201b1f}.auth-form{display:grid;gap:14px}.auth-form label{display:grid;gap:7px;color:var(--muted);font-size:14px}.auth-form input,.search-box input,.composer textarea,.model-select select{border:0;outline:0;background:transparent;color:var(--ink)}.auth-form input{min-height:44px;border:1px solid var(--line);border-radius:8px;padding:0 12px;background:#fbfcfb}.primary-button,.new-chat,.send-button{border:0;background:var(--accent);color:#fff;font-weight:700}.primary-button{min-height:46px;border-radius:8px}.error-row,.composer-error,.status-banner{gap:8px;color:var(--danger);font-size:14px}.app-shell{min-height:100vh;display:grid;grid-template-columns:auto 1fr}.sidebar{width:292px;height:100vh;display:flex;flex-direction:column;gap:12px;padding:14px;border-right:1px solid var(--line);background:#ecf1ee;transition:width .18s ease}.sidebar.collapsed{width:74px}.sidebar-top{justify-content:space-between;min-height:36px}.project-panel{display:grid;gap:8px;border:1px solid var(--line);border-radius:8px;background:#ffffffa3;padding:10px}.project-panel-title,.section-title{display:flex;align-items:center;justify-content:space-between;gap:8px;color:var(--muted);font-size:13px;font-weight:700}.project-panel-title span,.section-title span{min-width:0;display:inline-flex;align-items:center;gap:7px}.project-select{width:100%;min-height:36px;border:1px solid var(--line);border-radius:8px;background:#fbfcfb;color:var(--ink);padding:0 9px}.project-panel small{color:var(--muted);font-size:12px}.icon-button{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:#ffffffb8;color:var(--ink)}.mini-icon-button{width:28px;height:28px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;background:#fffc;color:var(--muted)}.new-chat{min-height:42px;display:flex;align-items:center;justify-content:center;gap:9px;border-radius:8px}.search-box{min-height:40px;display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:#ffffffc2;border-radius:8px;padding:0 10px;color:var(--muted)}.search-box input{width:100%}.session-list{flex:1;overflow:auto;display:grid;align-content:start;gap:6px;padding-right:2px}.session-item{width:100%;min-height:52px;display:flex;align-items:center;gap:10px;border:1px solid transparent;border-radius:8px;background:transparent;color:var(--ink);padding:8px;text-align:left}.session-item.active,.session-item:hover{background:#ffffffd1;border-color:var(--line)}.session-item span,.profile-row span:nth-child(2){min-width:0;flex:1;display:grid;gap:2px}.session-item strong,.profile-row strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.session-item small,.profile-row 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var(--line);flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.modal-hint{font-size:12px;color:var(--muted);line-height:1.5}.modal-hint code{font-family:ui-monospace,monospace;background:var(--panel-soft);border:1px solid var(--line);border-radius:4px;padding:1px 5px;font-size:11px}.modal-divider{border:none;border-top:1px solid var(--line);margin:0}.modal-actions{display:flex;gap:8px;padding-top:2px}.settings-divider{border:none;border-top:1px solid var(--line);margin:4px 0}.kb-header{display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.kb-header span{display:flex;align-items:center;gap:5px}.kb-header-actions{display:flex;gap:4px}.kb-doc-list{display:grid;gap:5px;max-height:190px;overflow-y:auto}.kb-doc-item{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px;border:1px solid var(--line);border-radius:7px;background:var(--panel);padding:7px 8px}.kb-doc-info{min-width:0;display:grid;gap:2px}.kb-doc-info strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:600}.kb-doc-info small{color:var(--muted);font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.kb-empty{font-size:12px;color:var(--muted);text-align:center;padding:12px 0;margin:0;line-height:1.5}.spinning{animation:icon-spin .9s linear infinite}@keyframes icon-spin{to{transform:rotate(360deg)}}.landing{--land-ink: #0b0f0d;--land-panel: #121815;--land-line: #223028;--land-paper: #ede9df;--land-muted: #8ba497;--land-accent: #45b98a;--land-signal: #e8a24b;min-height:100vh;display:flex;flex-direction:column;background:var(--land-ink);color:var(--land-paper);font-family:IBM Plex Sans,Inter,ui-sans-serif,system-ui,sans-serif}.landing-bar{display:flex;align-items:center;justify-content:space-between;padding:22px clamp(20px,5vw,64px);border-bottom:1px solid var(--land-line)}.landing-word{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:13px;letter-spacing:.14em;color:var(--land-paper)}.landing-nav-cta{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:13px;letter-spacing:.04em;background:transparent;color:var(--land-paper);border:1px solid var(--land-line);border-radius:7px;padding:8px 16px;cursor:pointer;transition:border-color .15s ease,color .15s ease}.landing-nav-cta:hover{border-color:var(--land-accent);color:var(--land-accent)}.landing-hero{flex:1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:clamp(24px,6vw,72px);max-width:1180px;width:100%;margin:0 auto;padding:clamp(40px,8vh,96px) clamp(20px,5vw,64px)}.landing-eyebrow{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--land-accent);margin:0 0 18px}.landing-headline{font-family:Fraunces,Georgia,serif;font-optical-sizing:auto;font-weight:500;font-size:clamp(34px,5vw,54px);line-height:1.08;letter-spacing:-.01em;margin:0 0 20px;color:var(--land-paper)}.landing-sub{font-size:16px;line-height:1.65;color:var(--land-muted);max-width:46ch;margin:0 0 30px}.landing-cta-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.landing-cta{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:14px;letter-spacing:.03em;background:var(--land-accent);color:#06120c;border:none;border-radius:8px;padding:13px 26px;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.landing-cta:hover{transform:translateY(-1px);box-shadow:0 10px 26px #45b98a47}.landing-cta-note{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:12px;color:var(--land-muted)}.landing-diagram-wrap{display:flex;align-items:center;justify-content:center;padding:20px}.landing-diagram{width:100%;max-width:460px;height:auto;overflow:visible}.landing-trace-line{stroke:var(--land-accent);stroke-width:1.5;opacity:.75;stroke-dasharray:360;stroke-dashoffset:360;animation:landing-draw 1s ease-out forwards}.landing-trace-1{animation-delay:.15s}.landing-trace-2{animation-delay:.3s}.landing-trace-3{animation-delay:.45s}.landing-node circle,.landing-node rect{fill:var(--land-panel);stroke:var(--land-line);stroke-width:1.5}.landing-node text{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:11px;fill:var(--land-muted)}.landing-node-you circle{stroke:var(--land-accent)}.landing-node-you text{text-anchor:middle;fill:var(--land-paper);letter-spacing:.08em}.landing-node-hub rect{fill:var(--land-accent);stroke:none}.landing-node-hub-label{text-anchor:middle;fill:#06120c!important;font-weight:500;letter-spacing:.06em}.landing-node-leaf circle{fill:var(--land-ink);stroke:var(--land-signal)}.landing-node-leaf text{text-anchor:start;fill:var(--land-paper)}.landing-pulse{fill:var(--land-signal);offset-path:path("M 264 180 L 396 180");animation:landing-pulse-travel 2.8s ease-in-out 1.2s infinite}@keyframes landing-draw{to{stroke-dashoffset:0}}@keyframes landing-pulse-travel{0%{offset-distance:0%;opacity:0}8%{opacity:1}92%{opacity:1}to{offset-distance:100%;opacity:0}}@media (prefers-reduced-motion: reduce){.landing-trace-line{animation:none;stroke-dashoffset:0}.landing-pulse{animation:none;opacity:0}}.landing-features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,4vw,40px);max-width:1180px;width:100%;margin:0 auto;padding:40px clamp(20px,5vw,64px) 60px;border-top:1px solid var(--land-line)}.landing-feature-label{font-family:IBM Plex Mono,ui-monospace,monospace;font-size:11px;letter-spacing:.1em;color:var(--land-signal);margin:0 0 10px}.landing-feature-body{font-size:14.5px;line-height:1.6;color:var(--land-muted);margin:0}.landing-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding:22px clamp(20px,5vw,64px);border-top:1px solid var(--land-line);font-size:12.5px;color:var(--land-muted)}.landing-footer a{color:var(--land-muted);text-decoration:none;border-bottom:1px solid var(--land-line);padding-bottom:1px;transition:color .15s ease,border-color .15s ease}.landing-footer a:hover{color:var(--land-accent);border-color:var(--land-accent)}@media (max-width: 860px){.landing-hero{grid-template-columns:1fr}.landing-diagram-wrap{order:-1}.landing-features{grid-template-columns:1fr}}