:root{--beige-50:#f5f2ec;--beige-100:#ebe8e1;--beige-200:#ddd9d2;--beige-300:#d4d0c9;--beige-400:#b8b4ac;--beige-500:#8a8780;--green-900:#1d2a1f;--green-800:#243224;--green-700:#3a5a3c;--green-600:#4d6e50;--green-500:#5e7e60;--green-400:#7a9a7c;--green-300:#a9bfa6;--green-200:#c8d4c1;--paper-50:#f5f2ec;--paper-100:#ebe8e1;--paper-200:#ddd9d2;--paper-300:#d4d0c9;--paper-400:#b8b4ac;--paper-500:#8a8780;--ink-900:#1a1612;--ink-700:#3d3830;--ink-500:#5a5650;--ink-400:#7a7670;--ink-300:#9a9690;--accent:#3a5a3c;--accent-soft:#e4ece4;--warn:#b8741c;--warn-soft:#f5e8d3;--danger:#9a3a2e;--danger-soft:#f3dcd5;--info:#2f5d7a;--info-soft:#dde7ee;--ok:#3d6e44;--ok-soft:#dde9da;--bg-page:#ebe8e1;--bg-shell:#ebe8e1;--bg-main:#ebe8e1;--bg-card:#f5f2ec;--border:rgba(26,22,18,0.10);--border-strong:rgba(26,22,18,0.18);--shadow-card:0 1px 0 rgba(26,22,18,0.04),0 12px 30px -18px rgba(26,22,18,0.12);--shadow-shell:0 30px 60px -30px rgba(26,22,18,0.25);--font-serif:"Newsreader","Source Serif Pro",Georgia,serif;--font-sans:"Comfortaa","Geist",ui-sans-serif,system-ui,sans-serif;--font-mono:"Geist Mono","IBM Plex Mono",ui-monospace,monospace;--density:1;--space-1:calc(4px * var(--density));--space-2:calc(8px * var(--density));--space-3:calc(12px * var(--density));--space-4:calc(16px * var(--density));--space-5:calc(20px * var(--density));--space-6:calc(24px * var(--density));--space-8:calc(32px * var(--density));--space-10:calc(40px * var(--density));--space-12:calc(48px * var(--density));--radius-sm:8px;--radius-md:12px;--radius-lg:18px;--radius-xl:28px}.theme-dark{--beige-50:#1a1a1a;--beige-100:#141414;--beige-200:#1e1e1e;--beige-300:#282828;--beige-400:#3a3a3a;--beige-500:#5a5a5a;--paper-50:#1a1a1a;--paper-100:#141414;--paper-200:#1e1e1e;--paper-300:#282828;--paper-400:#3a3a3a;--paper-500:#5a5a5a;--green-700:#3a5a3c;--green-600:#4d6e50;--ink-900:#e8e4de;--ink-700:#c0bbb4;--ink-500:#7a7670;--ink-400:#5a5650;--ink-300:#3a3630;--bg-page:#0a0a0a;--bg-shell:#0a0a0a;--bg-main:#0a0a0a;--bg-card:#141414;--border:rgba(232,228,222,0.10);--border-strong:rgba(232,228,222,0.18);--accent-soft:#1e2a1e;--shadow-card:0 1px 0 rgba(0,0,0,0.4),0 12px 30px -18px rgba(0,0,0,0.6);--shadow-shell:0 30px 60px -30px rgba(0,0,0,0.7)}[data-accent=green]{--accent:#2c3d2e;--accent-soft:#e8eee5}[data-accent=blue]{--accent:#2f5d7a;--accent-soft:#dde7ee}[data-accent=violet]{--accent:#524271;--accent-soft:#ebe5f3}[data-accent=amber]{--accent:#8a5a1a;--accent-soft:#f4e7cf}[data-density=compact]{--density:0.85}[data-density=comfortable]{--density:1}[data-density=spacious]{--density:1.18}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{font-family:var(--font-sans);font-size:14px;color:var(--ink-900);background:var(--bg-page);-webkit-font-smoothing:antialiased;font-feature-settings:"ss01","cv11"}button{cursor:pointer;border:none;background:none}button,input,select,textarea{font-family:inherit;color:inherit}input,select,textarea{font-size:inherit}a{color:inherit;text-decoration:none}::selection{background:var(--accent-soft);color:var(--ink-900)}.app-stage{min-height:100vh;background:var(--bg-page);padding:24px;display:flex;align-items:center;justify-content:center}.app-window{width:min(1380px,100%);height:min(880px,calc(100vh - 48px));background:var(--bg-shell);border-radius:var(--radius-xl);box-shadow:var(--shadow-shell);overflow:hidden;display:flex}.shell{display:flex;flex:1 1;min-height:0}.sidebar{width:300px;min-width:300px;background:var(--beige-100);color:var(--ink-900);display:flex;flex-direction:column;padding:20px 12px 16px;gap:0;overflow:hidden;border-right:none;position:relative}.brand-row{justify-content:flex-start;padding:4px 6px 28px}.brand-row,.search-box{display:flex;align-items:center;gap:8px}.search-box{background:var(--beige-300);border:none;border-radius:8px;padding:7px 10px;color:var(--ink-500);font-size:12px}.search-box input{flex:1 1;background:transparent;border:none;outline:none;color:var(--ink-900);font-size:12.5px}.search-box input::placeholder{color:var(--ink-400)}.sidebar-section-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.12em;color:var(--ink-400);padding:0 10px;margin-top:24px;margin-bottom:8px}.nav-section{display:flex;flex-direction:column;gap:3px}.nav-item{display:flex;align-items:center;gap:10px;padding:10px;border-radius:8px;color:var(--ink-600);font-size:13px;font-weight:400;transition:background .1s,color .1s;white-space:nowrap;overflow:hidden;text-decoration:none}.nav-item:hover{background:var(--beige-300);color:var(--ink-900)}.nav-item.active{background:var(--ink-900);color:var(--bg-page);font-weight:500}.nav-label{overflow:hidden;text-overflow:ellipsis}.sidebar-collections{display:flex;flex-direction:column;gap:3px;margin-bottom:6px}.sidebar-collection-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;color:var(--ink-600);font-size:12.5px;text-decoration:none;transition:background .1s,color .1s;overflow:hidden}.sidebar-collection-item:hover{background:var(--beige-300);color:var(--ink-900)}.sidebar-collection-item.active{background:var(--beige-400);color:var(--ink-900);font-weight:500}.sidebar-collection-count{font-size:11px;color:var(--ink-400);font-weight:400;flex-shrink:0;margin-left:auto}.sidebar-new-collection{display:flex;align-items:center;justify-content:center;padding:8px 10px;border-radius:8px;border:1.5px dashed var(--border);background:transparent;color:var(--ink-500);font-size:12px;font-weight:400;cursor:pointer;text-decoration:none;transition:border-color .1s,color .1s,background .1s;margin-top:4px}.sidebar-new-collection:hover{border-color:var(--ink-400);color:var(--ink-900);background:var(--beige-200)}.sidebar-divider{height:1px;background:var(--border);margin:8px 0}.sidebar-collapse-btn{display:flex;align-items:center;justify-content:center;width:100%;padding:8px 0;border-radius:8px;border:none;background:rgba(0,0,0,.06);color:rgba(0,0,0,.35);cursor:pointer;margin-bottom:8px;transition:background .12s,color .12s}.sidebar-collapse-btn:hover{background:rgba(0,0,0,.12);color:rgba(0,0,0,.6)}.theme-dark .sidebar-collapse-btn{background:rgba(255,255,255,.06);color:rgba(255,255,255,.35)}.theme-dark .sidebar-collapse-btn:hover{background:rgba(255,255,255,.12);color:rgba(255,255,255,.6)}.user-card{gap:10px;padding:8px 6px 0;cursor:pointer;border-top:1px solid var(--border);margin-top:8px}.avatar,.user-card{display:flex;align-items:center}.avatar{width:30px;height:30px;border-radius:999px;background:linear-gradient(135deg,#c8d8e0,#9ab8c8);justify-content:center;font-weight:700;font-size:12px;flex-shrink:0}.avatar,.user-name{color:var(--ink-900)}.user-name{font-size:12.5px;font-weight:500;white-space:nowrap}.user-email{font-size:11px;color:var(--ink-500);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.workspace{flex:1 1;display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--bg-page);overflow:hidden}.workspace-topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;flex-shrink:0}.h-display,.h-section,.h-title{font-family:var(--font-serif);font-weight:400;letter-spacing:-.01em;color:var(--ink-900);margin:0}.h-display{font-size:44px;line-height:1.05;letter-spacing:-.02em}.h-title{font-size:28px;line-height:1.15}.h-section{font-size:20px;line-height:1.25}.h-eyebrow{font-family:var(--font-sans);font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.14em;margin:0}.h-eyebrow,.muted{color:var(--ink-500)}.subtle{color:var(--ink-400)}.page-sub{font-size:12px;color:var(--ink-500);margin:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:10px;font-size:13.5px;font-weight:500;letter-spacing:.01em;transition:background .12s ease,color .12s ease,border-color .12s ease;white-space:nowrap;border:1px solid transparent;cursor:pointer}.btn-primary{background:var(--accent);color:#f5f2ec}.btn-primary:hover{background:var(--green-700)}.btn-secondary,.btn.secondary{background:var(--beige-200);color:var(--ink-900);border-color:transparent}.btn-secondary:hover,.btn.secondary:hover{background:var(--beige-300)}.btn-ghost{background:transparent;color:var(--ink-700);border-color:var(--border)}.btn-ghost:hover{background:var(--beige-200)}.btn-danger{background:transparent;color:var(--danger);border-color:var(--danger-soft)}.btn-danger:hover{background:var(--danger-soft)}.btn-sm{padding:6px 12px;font-size:12.5px;border-radius:8px}.btn-lg{padding:14px 22px;font-size:14px;border-radius:12px}.btn:disabled{opacity:.5;cursor:not-allowed}.field{display:flex;flex-direction:column;gap:6px}.field-label{font-size:12.5px;font-weight:500;color:var(--ink-700)}.field-hint{font-size:12px;color:var(--ink-500)}.input,.select,.textarea{width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--border);background:var(--bg-card);color:var(--ink-900);font-size:13.5px;outline:none;transition:border-color .12s,box-shadow .12s}.input:focus,.select:focus,.textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.textarea{resize:vertical;min-height:80px;line-height:1.5}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-card)}.card-pad{padding:var(--space-6)}.pill{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:500;letter-spacing:.04em;text-transform:uppercase}.pill-ok{background:var(--ok-soft);color:var(--ok)}.pill-warn{background:var(--warn-soft);color:var(--warn)}.pill-info{background:var(--info-soft);color:var(--info)}.pill-danger{background:var(--danger-soft);color:var(--danger)}.pill-neutral{background:var(--beige-200);color:var(--ink-700)}.status-pill{display:inline-flex;padding:3px 10px;font-size:11.5px;background:var(--ok-soft);color:var(--ok);text-transform:uppercase;font-weight:500}.dot,.status-pill{border-radius:999px}.dot{width:6px;height:6px;background:currentColor}.hr{height:1px;border:0;margin:0}.hr,.vr{background:var(--border)}.vr{width:1px;align-self:stretch}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-page)}::-webkit-scrollbar-thumb{background:var(--beige-300);border-radius:999px;border:2px solid var(--bg-page);background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:var(--beige-400);border:2px solid var(--bg-page);background-clip:padding-box}.chat-thread .chat-msg{transition:opacity .18s ease}.chat-thread:hover .chat-msg{opacity:.38}.chat-thread:hover .chat-msg:hover{opacity:1}.center-thread .center-block{transition:opacity .2s ease}.center-thread:hover .center-block{opacity:.35}.center-thread:hover .center-block:hover{opacity:1}.row{align-items:center}.col,.row{display:flex}.col{flex-direction:column}.gap-1{gap:4px}.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.gap-5{gap:20px}.gap-6{gap:24px}.gap-8{gap:32px}.grow{flex:1 1}.center{display:flex;align-items:center;justify-content:center}.between{justify-content:space-between}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@keyframes pulse-soft{0%,to{opacity:1}50%{opacity:.55}}@keyframes pulse-history{0%,to{transform:scale(1);opacity:1;filter:drop-shadow(0 0 0 rgba(127,195,155,0))}50%{transform:scale(1.12);opacity:.85;filter:drop-shadow(0 0 8px rgba(127,195,155,.28))}}@keyframes pulse-history-strong{0%,to{transform:scale(1);opacity:1;filter:drop-shadow(0 0 0 rgba(127,195,155,0))}30%{transform:scale(1.18);opacity:1;filter:drop-shadow(0 0 14px rgba(127,195,155,.45))}60%{transform:scale(1.08);opacity:.92;filter:drop-shadow(0 0 10px rgba(127,195,155,.32))}}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.fade-in{animation:fadeIn .26s ease both}.pulse-history{animation:pulse-history 1.6s ease-in-out infinite}.pulse-history,.pulse-history-strong{transform-origin:center;display:inline-flex}.pulse-history-strong{animation:pulse-history-strong 1.1s ease-in-out infinite}.skel{background:linear-gradient(90deg,var(--beige-200) 0,var(--beige-300) 50%,var(--beige-200) 100%);background-size:200% 100%;animation:shimmer 1.6s ease-in-out infinite;border-radius:6px}.auth-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg-page)}.auth-panel{width:100%;max-width:400px;background:var(--bg-card);border:1px solid var(--border);border-radius:20px;padding:40px 36px;box-shadow:var(--shadow-shell);display:flex;flex-direction:column;gap:14px}.auth-title{font-family:var(--font-serif);font-size:26px;font-weight:400;margin:0 0 6px;color:var(--ink-900)}.chat-col{display:flex;flex-direction:column;min-height:0;flex:1 1}.chat-body{flex:1 1;overflow:auto;padding:24px}.msg{max-width:95%;padding:12px 16px;border-radius:14px;font-size:13.5px;line-height:1.65}.msg.user{margin-left:auto;background:var(--accent);color:#f5f2ec;border-radius:14px 14px 4px 14px;max-width:84%;min-width:180px}.msg.assistant{max-width:95%;background:var(--beige-200);border:none;border-radius:4px 14px 14px 14px}.assistant-hero{text-align:center;max-width:720px;margin:40px auto;padding:0 24px}.assistant-hero h1{font-family:var(--font-serif);font-size:28px;font-weight:400;margin:0 0 8px}.assistant-hero p{font-size:13.5px;color:var(--ink-500);margin:0 0 36px}.orb{width:56px;height:56px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#c8d8ff,var(--accent));margin:0 auto 24px;opacity:.85;box-shadow:0 8px 32px -8px rgba(44,61,46,.35)}.composer-card{max-width:600px;margin:20px auto;background:var(--bg-card);border:1px solid var(--border);border-radius:14px;padding:14px 16px;box-shadow:var(--shadow-card)}.composer-card.compact{max-width:none;margin:0;padding:10px 14px;border-radius:12px}.composer-input{width:100%;border:0;background:transparent;outline:none;resize:none;font-family:var(--font-sans);font-size:13.5px;line-height:1.6;color:var(--ink-900)}.composer-tools{display:flex;justify-content:space-between;align-items:center;margin-top:10px}.tool-group{display:flex;gap:8px;flex-wrap:wrap}.tool-chip{padding:4px 12px;border:1px solid var(--border);border-radius:999px;background:transparent;font-size:12px;font-weight:500;color:var(--ink-700);cursor:pointer}.tool-chip:hover{background:var(--beige-200)}.send-button{padding:8px 10px;border-radius:10px;background:var(--accent);color:#f5f2ec;border:0;cursor:pointer;display:flex;align-items:center}.send-button:disabled{opacity:.5;cursor:not-allowed}.collection-list-head{padding:var(--space-4) 0;border-bottom:1px solid var(--border);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-500)}.collection-card,.collection-list-head{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;grid-gap:var(--space-4);gap:var(--space-4)}.collection-card{padding:10px 8px;background:transparent;border:none;border-bottom:1px solid var(--border);align-items:center;border-radius:var(--radius-sm);transition:background .12s}.collection-card:hover{background:var(--beige-100)}.collection-actions{display:flex;gap:var(--space-2)}.action-chip{padding:6px 12px;border-radius:8px;border:1px solid var(--border);background:transparent;font-size:12px;color:var(--ink-700);cursor:pointer}.action-chip:hover{background:var(--beige-200)}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-5)}.stat-card span{font-size:12px;color:var(--ink-500)}.stat-card strong{display:block;font-size:22px;margin-top:6px}.doc-row-card{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4);padding:var(--space-4);background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md)}.doc-actions{display:flex;gap:var(--space-2)}.soft-action-btn{padding:6px 12px;border-radius:8px;border:1px solid var(--border);background:transparent;font-size:11px;color:var(--ink-700);cursor:pointer}.soft-action-btn:hover{background:var(--beige-200)}.soft-action-btn.danger{color:var(--danger);border-color:var(--danger-soft)}.soft-action-btn.danger:hover{background:var(--danger-soft)}.upload-zone{padding:var(--space-5);border:2px dashed var(--border);border-radius:var(--radius-md);background:var(--bg-card);cursor:pointer;text-align:center;transition:all .2s}.upload-zone.drag-active{border-color:var(--accent);background:var(--accent-soft)}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-6)}.page-head h2{font-family:var(--font-serif);font-size:20px;font-weight:400;margin:0}.workspace-content{padding:var(--space-6);overflow:auto;flex:1 1}.empty-state{border:1px dashed var(--border-strong);border-radius:12px;padding:28px;color:var(--ink-500);text-align:center}@media (max-width:1100px){.app-stage{padding:10px}.app-window{height:calc(100vh - 20px)}.collection-list-head{display:none}.collection-card{grid-template-columns:1fr}}.logo-dark,.theme-dark .logo-light{display:none}.theme-dark .logo-dark{display:block}