:root{--bg-primary: #0b1020;--bg-secondary: #141b31;--bg-card: #1a223b;--bg-card-strong: rgba(24, 31, 55, .92);--accent: #14b8a6;--accent-hover: #0f9f91;--accent-soft: rgba(20, 184, 166, .16);--text-primary: #eef2ff;--text-secondary: #9aa6c4;--border: rgba(154, 166, 196, .16);--success: #22c55e;--error: #ef4444;--warning: #f59e0b;font-family:Segoe UI,Helvetica Neue,system-ui,sans-serif;color:var(--text-primary);background:radial-gradient(circle at top left,rgba(20,184,166,.18),transparent 28%),radial-gradient(circle at top right,rgba(59,130,246,.18),transparent 24%),linear-gradient(180deg,#0b1020,#090d19)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg-primary);color:var(--text-primary);background-attachment:fixed}a{color:#8bffe8;text-underline-offset:3px}button,input,textarea,select{font:inherit}button{transition:background .2s ease,transform .2s ease,border-color .2s ease}.auth-shell{min-height:100vh;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:32px 24px 20px;gap:18px}.auth-card{width:min(420px,100%);display:flex;flex-direction:column;gap:12px;background:var(--bg-card-strong);box-shadow:0 24px 80px #00000059;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border:1px solid var(--border);border-radius:24px;padding:32px}.auth-card h1{margin:0;font-size:clamp(2rem,3vw,2.6rem);letter-spacing:-.04em}.auth-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;border:1px solid var(--border);background:#ffffff08;color:#b9fff4;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;width:fit-content}.auth-subtitle{margin:-4px 0 8px;color:var(--text-secondary);line-height:1.6;font-size:14px}.auth-card input,.auth-card select,.auth-card button,.chat-form textarea{border-radius:12px;border:1px solid var(--border);background:#080d1c75;color:var(--text-primary);padding:12px 14px}.auth-card input:focus,.auth-card select:focus,.chat-form textarea:focus{outline:none;border-color:#14b8a68c;box-shadow:0 0 0 4px #14b8a61f}.primary-button,.auth-card button,.chat-form button{display:inline-flex;align-items:center;gap:8px;justify-content:center;border:none;background:linear-gradient(135deg,var(--accent) 0%,#0ea5e9 100%);color:#fff;cursor:pointer;box-shadow:0 14px 30px #14b8a62e}.primary-button:hover,.auth-card button:hover,.chat-form button:hover{transform:translateY(-1px);background:linear-gradient(135deg,var(--accent-hover) 0%,#0284c7 100%)}.ghost-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 14px;border-radius:12px;background:#ffffff09;border:1px solid var(--border);color:var(--text-primary);cursor:pointer;text-decoration:none}.ghost-button:hover{background:#ffffff14;border-color:#8bffe838;transform:translateY(-1px)}.form-error{color:var(--error);font-size:14px}.page-shell{min-height:100vh;padding:28px 24px 16px;display:flex;flex-direction:column;gap:24px}.page-panel{max-width:860px;margin:0 auto;padding:32px 16px 12px;color:var(--text-primary);min-height:100vh;display:flex;flex-direction:column}.page-footer{margin-top:auto;padding:18px 0 8px;color:var(--text-secondary);text-align:center;font-size:13px}.page-footer a{color:#b9fff4;text-decoration:none}.topbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 20px;border-radius:22px;background:linear-gradient(180deg,#ffffff08,#ffffff03),var(--bg-card-strong);border:1px solid var(--border);box-shadow:0 22px 60px #0000003d}.topbar h1{margin:0 0 6px}.topbar p{margin:0;color:var(--text-secondary)}.topbar-actions{display:flex;gap:12px}.warning-banner{padding:14px 16px;border-radius:12px;background:#f59e0b22;border:1px solid var(--warning);color:#fcd34d}.documents-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.dashboard-hero{display:grid;grid-template-columns:1.4fr .8fr;gap:18px;padding:24px;border-radius:24px;background:radial-gradient(circle at top right,rgba(20,184,166,.12),transparent 26%),linear-gradient(180deg,#ffffff08,#ffffff03),var(--bg-card-strong);border:1px solid var(--border)}.dashboard-hero h2{margin:14px 0 8px;font-size:clamp(1.8rem,3vw,2.5rem);line-height:1.05;letter-spacing:-.04em}.dashboard-hero p{margin:0;max-width:60ch;color:var(--text-secondary);line-height:1.7}.dashboard-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;align-self:end}.dashboard-stat{padding:16px;border-radius:18px;background:#070c1a6b;border:1px solid var(--border);display:flex;flex-direction:column;gap:4px}.dashboard-stat strong{font-size:1.7rem;letter-spacing:-.04em}.dashboard-stat span{color:var(--text-secondary);font-size:12px;text-transform:uppercase;letter-spacing:.08em}.dashboard-section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:14px}.dashboard-section-head h3{margin:0 0 4px;font-size:1.2rem}.dashboard-section-head p{margin:0;color:var(--text-secondary)}.upload-zone-wrap{position:relative}.upload-zone{border:1.5px dashed rgba(154,166,196,.34);border-radius:24px;padding:34px 20px;background:radial-gradient(circle at top,rgba(20,184,166,.12),transparent 32%),var(--bg-card-strong);text-align:center;cursor:pointer;transition:border-color .2s ease,transform .2s ease,background .2s ease}.upload-zone:hover,.upload-zone.drag-active{border-color:#14b8a699;transform:translateY(-1px)}.upload-zone-icon{width:56px;height:56px;display:inline-flex;align-items:center;justify-content:center;border-radius:18px;background:#14b8a624;color:#9ffaf0;margin-bottom:14px}.upload-zone-title{font-weight:700;font-size:1.05rem;margin-bottom:6px}.upload-zone-copy{color:var(--text-secondary);font-size:14px}.document-card{width:100%;text-align:left;background:linear-gradient(180deg,#ffffff08,#ffffff03),var(--bg-card-strong);border:1px solid var(--border);border-radius:20px;padding:18px;color:var(--text-primary);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}.document-card.is-ready{cursor:pointer}.document-card.is-ready:hover{transform:translateY(-2px);border-color:#14b8a647;box-shadow:0 20px 40px #00000038}.document-card-icon{width:42px;height:42px;flex-shrink:0;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;background:#14b8a61f;color:#a7fff1}.document-card-title{font-weight:700;line-height:1.25;margin-bottom:6px}.document-card-meta,.document-card-date{color:var(--text-secondary);font-size:13px}.document-provider-chip{font-size:12px;color:var(--text-primary);background:#ffffff0d;border:1px solid var(--border);border-radius:999px;padding:5px 10px}.document-delete-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:4px;border-radius:8px;display:flex;align-items:center;justify-content:center}.chat-layout{height:100vh;display:grid;grid-template-columns:220px 1fr 380px;overflow:hidden}.chat-sidebar{background:#12141f;border-right:1px solid var(--border);overflow-y:auto;display:flex;flex-direction:column;gap:2px;padding:12px 8px}.sidebar-back{display:flex;align-items:center;gap:6px;color:var(--text-secondary);text-decoration:none;font-size:12px;padding:6px 8px;border-radius:6px;margin-bottom:8px;transition:background .15s}.sidebar-back:hover{background:var(--bg-card);color:var(--text-primary)}.sidebar-section-header{display:flex;align-items:center;justify-content:space-between;padding:4px 8px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-secondary);margin-bottom:2px}.icon-btn{display:flex;align-items:center;justify-content:center;background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:3px;border-radius:4px;transition:background .15s,color .15s}.icon-btn:hover{background:var(--bg-card);color:var(--text-primary)}.icon-btn.danger:hover{color:var(--error);background:#ef444422}.new-folder-row{display:flex;gap:4px;padding:4px 8px}.new-folder-row input{flex:1;font-size:12px;padding:4px 8px;border-radius:6px;border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-primary)}.new-folder-row button{font-size:11px;padding:4px 8px;border-radius:6px;border:none;background:var(--accent);color:#fff;cursor:pointer}.folder-group{border-radius:8px;margin-bottom:2px;transition:background .15s}.folder-group.drag-over{background:var(--accent)22;outline:1px dashed var(--accent)}.folder-header{display:flex;align-items:center;gap:4px;padding:2px 4px}.folder-toggle{flex:1;display:flex;align-items:center;gap:5px;background:none;border:none;color:var(--text-secondary);font-size:12px;cursor:pointer;padding:4px;border-radius:6px;text-align:left;transition:background .15s,color .15s;min-width:0}.folder-toggle:hover{background:var(--bg-card);color:var(--text-primary)}.folder-toggle span:first-of-type{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.folder-count{font-size:10px;background:var(--bg-card);border-radius:10px;padding:1px 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var(--border);overflow:auto;display:flex;flex-direction:column;align-items:center;padding:16px;gap:12px}.pdf-stage{position:relative;display:inline-block;max-width:100%}.pdf-canvas{display:block;max-width:100%;height:auto;background:#fff;border-radius:10px;box-shadow:0 20px 50px #00000059}.pdf-overlay{position:absolute;top:0;left:0;pointer-events:none}.viewer-error{color:var(--error);background:#ef444422;border:1px solid var(--error);padding:12px 14px;border-radius:10px;width:100%}.viewer-info{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-secondary);align-self:flex-start;background:var(--bg-secondary);padding:5px 10px;border-radius:6px;border:1px solid var(--border);max-width:100%;overflow:hidden}.viewer-info strong{color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.viewer-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:14px;color:var(--text-secondary);font-size:13px;opacity:.5}.chat-main{background:var(--bg-card);display:flex;flex-direction:column;overflow:hidden}.chat-header{padding:12px 16px;border-bottom:1px solid var(--border);font-weight:600;font-size:13px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.chat-header-meta{font-size:11px;font-weight:400;color:var(--text-secondary)}.messages{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:10px}.messages-empty{color:var(--text-secondary);font-size:13px;text-align:center;margin-top:40px}.message{max-width:88%;padding:10px 13px;border-radius:14px;font-size:13px;line-height:1.65}.message.user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}.message.assistant{align-self:flex-start;background:var(--bg-secondary);border-bottom-left-radius:4px}.message.loading{opacity:.5}.markdown-content p,.markdown-content ol,.markdown-content h1,.markdown-content h2,.markdown-content h3{margin:0 0 10px}.markdown-content p:last-child,.markdown-content ol:last-child,.markdown-content h1:last-child,.markdown-content h2:last-child,.markdown-content h3:last-child{margin-bottom:0}.markdown-content ol{padding-left:18px}.markdown-content li+li{margin-top:6px}.markdown-content strong{color:#fff;font-weight:700}.markdown-content code{background:#ffffff14;border:1px solid rgba(255,255,255,.08);border-radius:6px;padding:1px 6px;font-size:.92em}.markdown-content a{color:#c4b5fd}.sources-toggle{display:inline-flex;align-items:center;gap:4px;background:none;border:1px solid var(--border);color:var(--text-secondary);border-radius:5px;padding:2px 8px;font-size:11px;cursor:pointer;transition:border-color .15s,color .15s}.sources-toggle:hover{border-color:var(--accent);color:var(--accent)}.sources-list{display:flex;flex-direction:column;gap:5px;margin-top:8px}.source-card{text-align:left;display:flex;flex-direction:column;gap:4px;padding:8px 10px;background:var(--bg-primary);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);cursor:pointer;width:100%;transition:border-color .15s}.source-card:hover,.source-card.active{border-color:var(--accent)}.source-card-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.source-card-header strong{color:var(--accent);font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.source-page{font-size:10px;color:var(--text-secondary);background:var(--bg-secondary);padding:1px 5px;border-radius:4px;flex-shrink:0}.source-text{font-size:11px;color:var(--text-secondary);overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.chat-form{display:flex;gap:8px;padding:10px 12px;border-top:1px solid var(--border);align-items:flex-end;flex-shrink:0}.chat-form textarea{flex:1;min-height:40px;max-height:100px;resize:none;border-radius:10px;border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-primary);padding:9px 12px;font-size:13px}.chat-form textarea:focus{outline:none;border-color:var(--accent)}.chat-form button{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;border:none;background:var(--accent);color:#fff;cursor:pointer;flex-shrink:0}.chat-form button:disabled{opacity:.4;cursor:not-allowed}.spin{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (max-width: 1100px){.chat-layout{grid-template-columns:1fr;grid-template-rows:auto 1fr auto;height:auto}.chat-main{height:80vh}}