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strong{display:block;color:var(--sidebar-text);font-size:13px}.sidebar-nav{flex:1;padding:8px 0;overflow-y:auto;min-height:0}.sidebar-sessions{padding-top:0}.sidebar-chat-actions{padding:0 12px 8px}.btn-new-chat{width:100%;padding:10px 12px;border-radius:8px;border:1px solid transparent;background:var(--sidebar-new-chat-bg);color:#fff;font-size:13px;font-weight:600;cursor:pointer;transition:background .15s}.btn-new-chat:hover{background:var(--sidebar-new-chat-hover)}.sessions-empty{padding:8px 16px 16px;font-size:12px;color:var(--sidebar-muted)}.session-item{display:block;width:100%;text-align:left;padding:10px 14px;cursor:pointer;border:0;border-bottom:1px solid 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button{display:block;width:100%;text-align:left;border:0;background:transparent;color:var(--sidebar-text);font-size:13px;padding:9px 10px;border-radius:6px;cursor:pointer}.profile-menu button:hover{background:var(--sidebar-hover)}.profile-menu button.danger{color:var(--danger)}.profile-menu-label{padding:8px 10px 4px;font-size:10px;color:var(--sidebar-muted);letter-spacing:1px;text-transform:uppercase}.profile-menu-sep{height:1px;background:var(--sidebar-border);margin:4px 6px}.user-avatar{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#1a56db,#0ea5e9);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;flex-shrink:0;overflow:hidden}.user-avatar.has-photo{background:transparent}.user-avatar img{width:100%;height:100%;object-fit:cover;display:block}.sidebar-user-info{flex:1;min-width:0}.sidebar-user-info strong{display:block;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--sidebar-text)}.sidebar-user-info span{font-size:10px;color:var(--sidebar-muted)}.sidebar-user-logout{cursor:pointer;color:var(--sidebar-muted);font-size:14px;padding:4px}.sidebar-user-logout:hover{color:var(--danger)}.main-content{flex:1;overflow:hidden;display:flex;flex-direction:column;min-width:0;height:100vh;background:var(--chat-bg);color:var(--text)}.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:14px 28px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;gap:12px}.topbar-left{display:flex;align-items:center;gap:12px;min-width:0}.topbar h1{font-size:18px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}.topbar-status{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted);background:color-mix(in 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solid var(--border);flex-shrink:0}.mobile-bar-title{font-size:16px;font-weight:700}.nav-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;border:0;padding:0;background:#0f172a73;opacity:0;pointer-events:none;transition:opacity .2s ease}.screen-app.nav-open .nav-backdrop{display:block;opacity:1;pointer-events:auto}.sidebar{position:fixed;top:0;left:0;bottom:0;width:min(280px,86vw);z-index:50;transform:translate(-105%);transition:transform .22s ease;box-shadow:8px 0 32px #0f172a40}.screen-app.nav-open .sidebar{transform:translate(0)}.sidebar-logo{padding-right:12px}.sidebar-close{display:inline-flex;margin-left:auto;width:32px;height:32px;align-items:center;justify-content:center;border:0;background:transparent;color:var(--sidebar-muted);cursor:pointer;border-radius:6px}.sidebar-close:hover{color:var(--sidebar-text);background:var(--sidebar-hover)}.topbar{padding:12px 14px}.topbar-status{display:none}.page-content{padding:14px}.modal-backdrop{padding:12px;align-items:flex-end}.modal-panel{width:100%;max-height:92vh;border-radius:16px 16px 0 0}}@media(max-width:420px){.mobile-bar{padding:8px 12px}.page-content{padding:12px}}.landing{--lp-ink: #0c1526;--lp-muted: #5a6578;--lp-paper: #f6f7f9;--lp-surface: #ffffff;--lp-line: rgba(12, 21, 38, .1);--lp-navy: #13294b;--lp-blue: #1a3a6b;--lp-blue-mid: #1e4d8c;--lp-serif: "IBM Plex Serif", "Georgia", serif;--lp-sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;height:100%;overflow-x:hidden;overflow-y:auto;background:var(--lp-paper);color:var(--lp-ink);font-family:var(--lp-sans);font-weight:400;-webkit-font-smoothing:antialiased}[data-theme=dark] .landing{--lp-ink: #e8eaed;--lp-muted: #9aa3b2;--lp-paper: #0e1116;--lp-surface: #171b22;--lp-line: rgba(255, 255, 255, .09);--lp-navy: #c5d0e0;--lp-blue: #8ba3c7;--lp-blue-mid: #6b8ab8}.landing-wrap{width:min(1040px,calc(100% - 56px));margin:0 auto}.landing-nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:28px;padding:16px 28px;background:color-mix(in srgb,var(--lp-paper) 92%,transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--lp-line)}.landing-nav-brand{display:inline-flex;align-items:center;gap:12px}.landing-nav-mark{width:34px;height:34px;border-radius:4px;display:grid;place-items:center;font-size:11px;font-weight:600;letter-spacing:.04em;color:#fff;background:var(--lp-navy)}[data-theme=dark] .landing-nav-mark{background:#2a3548;color:#e8eaed}.landing-nav-name{display:flex;flex-direction:column;gap:1px;font-size:14px;font-weight:600;letter-spacing:.01em;line-height:1.2;color:var(--lp-ink)}.landing-nav-tag{font-size:10px;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--lp-muted)}.landing-nav-links{display:flex;gap:28px;margin-left:auto;font-size:13px;font-weight:500;color:var(--lp-muted)}.landing-nav-links a{letter-spacing:.01em}.landing-nav-links a:hover{color:var(--lp-ink)}.landing-nav-cta{font-size:13px;font-weight:500;padding:8px 16px;border-radius:4px;border:1px solid var(--lp-navy);background:var(--lp-navy);color:#fff;letter-spacing:.02em}[data-theme=dark] .landing-nav-cta{background:transparent;border-color:var(--lp-line);color:var(--lp-ink)}.landing-nav-cta:hover{opacity:.92}.landing-hero{position:relative;min-height:calc(100vh - 67px);display:grid;grid-template-columns:1fr 1fr;align-items:stretch;overflow:hidden}.landing-hero-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(105deg,#eef1f5 0%,var(--lp-paper) 42%,#e4e9f0 100%);z-index:0}.landing-hero-bg:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(12,21,38,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(12,21,38,.03) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 35%,#000 100%);mask-image:linear-gradient(90deg,transparent 0%,#000 35%,#000 100%);opacity:.55;pointer-events:none}[data-theme=dark] .landing-hero-bg{background:linear-gradient(105deg,#0c1016 0%,var(--lp-paper) 45%,#121820 100%)}[data-theme=dark] .landing-hero-bg:after{background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px)}.landing-hero-content{position:relative;z-index:1;display:flex;flex-direction:column;justify-content:center;padding:clamp(56px,10vh,100px) clamp(28px,5vw,64px) clamp(56px,8vh,88px);max-width:580px;animation:landing-rise .65s ease-out both}.landing-brand{font-family:var(--lp-sans);font-size:12px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--lp-navy);margin-bottom:22px}[data-theme=dark] .landing-brand{color:var(--lp-blue)}.landing-hero-title{font-family:var(--lp-serif);font-size:clamp(2rem,3.4vw,2.75rem);font-weight:500;line-height:1.22;letter-spacing:-.02em;color:var(--lp-ink);margin-bottom:18px;max-width:16ch}.landing-hero-lead{font-size:1.02rem;line-height:1.65;color:var(--lp-muted);max-width:40ch;margin-bottom:32px;font-weight:400}.landing-hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}.landing-btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;border-radius:4px;font-size:13px;font-weight:500;letter-spacing:.02em;border:1px solid transparent;transition:background .15s ease,color .15s ease,border-color .15s ease}.landing-btn-primary{background:var(--lp-navy);color:#fff;border-color:var(--lp-navy)}.landing-btn-primary:hover{background:#0f2038}[data-theme=dark] .landing-btn-primary{background:#d8dee8;color:#0c1526;border-color:#d8dee8}[data-theme=dark] 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14px;font-size:13px;line-height:1.5}.landing-mock-msg.user{align-self:flex-end;background:#eef1f5;color:var(--lp-ink);border-radius:2px}[data-theme=dark] .landing-mock-msg.user{background:#222833;color:var(--lp-ink)}.landing-mock-msg.agent{align-self:flex-start;padding-left:14px;border-left:2px solid var(--lp-navy);color:var(--lp-ink)}[data-theme=dark] .landing-mock-msg.agent{border-left-color:var(--lp-blue)}.landing-section{padding:clamp(72px,11vh,112px) 0;border-top:1px solid var(--lp-line)}.landing-section-alt{background:color-mix(in srgb,var(--lp-surface) 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h3{grid-column:2;font-family:var(--lp-sans);font-size:1.05rem;font-weight:600;letter-spacing:-.01em;margin-bottom:10px;color:var(--lp-ink)}.landing-pillar p{grid-column:2;color:var(--lp-muted);line-height:1.6;max-width:54ch;font-size:.98rem}.landing-split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}.landing-flow{display:flex;flex-direction:column;gap:0}.landing-flow-step{padding:20px 22px;border:1px solid var(--lp-line);background:var(--lp-surface);border-radius:2px}.landing-flow-step span{display:block;font-weight:600;font-size:14px;margin-bottom:6px;color:var(--lp-ink)}.landing-flow-step small{color:var(--lp-muted);font-size:12px;line-height:1.4}.landing-flow-step.accent{border-color:color-mix(in srgb,var(--lp-navy) 35%,var(--lp-line));background:color-mix(in srgb,var(--lp-navy) 4%,var(--lp-surface))}[data-theme=dark] .landing-flow-step.accent{border-color:color-mix(in srgb,var(--lp-blue) 40%,var(--lp-line));background:color-mix(in srgb,var(--lp-blue) 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p{color:var(--lp-muted);max-width:42ch;line-height:1.6;margin-bottom:12px;font-size:1rem}.landing-footer{border-top:1px solid var(--lp-line);padding:28px 0 40px;color:var(--lp-muted);font-size:12px;background:color-mix(in srgb,var(--lp-surface) 50%,var(--lp-paper))}.landing-footer-inner{display:flex;flex-wrap:wrap;gap:16px 32px;justify-content:space-between;align-items:flex-end}.landing-footer-brand-block{display:flex;flex-direction:column;gap:4px}.landing-footer-brand{font-weight:600;font-size:13px;letter-spacing:.02em;color:var(--lp-ink)}.landing-footer-sub{font-size:11px;letter-spacing:.04em;text-transform:uppercase;color:var(--lp-muted)}@keyframes landing-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes landing-fade{0%{opacity:0}to{opacity:1}}@media(max-width:960px){.landing-hero{grid-template-columns:1fr;min-height:auto}.landing-hero-content{padding:48px 24px 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.screen-login{background:linear-gradient(145deg,#0a0a0a,#111827 45%,#1e293b)}.login-card{background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:20px;padding:48px 40px;width:420px;max-width:100%;box-shadow:var(--shadow-soft),0 25px 60px #00000047}.login-logo{display:flex;align-items:center;gap:10px;margin-bottom:32px}.login-logo-icon{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,#1a56db,#0ea5e9);display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;font-weight:800;letter-spacing:-.02em;flex-shrink:0}.login-logo-text h1{font-size:20px;font-weight:700;color:var(--text)}.login-logo-text p{font-size:11px;color:var(--text-muted);letter-spacing:1px;text-transform:uppercase}.login-card 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p{font-size:13px;color:var(--text-muted);line-height:1.45}.chat-drop-error{margin:0;padding:0 20px 8px;font-size:12px;color:var(--danger);text-align:center;flex-shrink:0}@keyframes chat-drop-fade{0%{opacity:0}to{opacity:1}}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0}.chat-topbar{padding:10px 18px;flex-shrink:0;background:transparent}.chat-topbar-main{display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:820px;margin:0 auto;width:100%}.chat-agent-info h3{font-size:14px;font-weight:600;letter-spacing:-.01em}.chat-agent-info p{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-muted);margin-top:2px}.chat-status-dot{width:7px;height:7px;border-radius:50%;background:#94a3b8;flex-shrink:0}.chat-status-dot[data-online=true]{background:var(--success);box-shadow:0 0 0 3px color-mix(in srgb,var(--success) 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#47556947}.msg-attach-file-icon{flex-shrink:0;width:36px;height:42px;border-radius:5px;color:#fff;font-size:9px;font-weight:800;letter-spacing:.03em;display:flex;align-items:center;justify-content:center}.msg-attach-text-preview{margin:0;padding:12px 14px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:10.5px;line-height:1.45;color:#334155;white-space:pre-wrap;word-break:break-word;max-height:220px;overflow:hidden;background:#fff}[data-theme=dark] .msg-attach-text-preview{background:#1a1a1a;color:#cbd5e1}.msg-attach-footer{display:flex;align-items:center;gap:10px;padding:10px 12px;background:color-mix(in srgb,var(--composer-surface) 70%,var(--surface));border-top:1px solid var(--border)}.msg-attach-meta{min-width:0;flex:1}.msg-attach-footer .msg-attach-actions{flex-direction:column;align-items:flex-end;gap:2px}.msg.agent .msg-bubble{background:transparent;padding:2px 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var(--border);border-radius:16px;box-shadow:var(--shadow-soft)}.chat-attach-preview-icon{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--primary-light);flex-shrink:0;font-size:18px}.chat-attach-preview-body{min-width:0;flex:1;display:flex;flex-direction:column;gap:2px}.chat-attach-preview-body strong{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-attach-preview-body span{font-size:11px;color:var(--text-muted)}.chat-attach-preview-remove{width:28px;height:28px;border-radius:8px;border:none;background:var(--composer-surface);color:var(--text-muted);cursor:pointer;flex-shrink:0}.chat-composer-box{display:flex;gap:6px;align-items:flex-end;padding:10px 10px 10px 8px;background:var(--composer-surface);border:1px solid var(--composer-border);border-radius:28px;box-shadow:var(--shadow-soft);transition:border-color .15s,box-shadow .15s}.chat-composer-box:focus-within{border-color:color-mix(in srgb,var(--primary) 55%,var(--composer-border))}.chat-attach-btn{width:40px;height:40px;border-radius:50%;background:transparent;color:var(--text);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0}.chat-attach-plus{font-size:26px;line-height:1;font-weight:400}.chat-attach-btn:hover:not(:disabled){background:color-mix(in srgb,var(--text) 8%,transparent)}.chat-attach-btn:disabled{opacity:.45;cursor:not-allowed}.chat-input{flex:1;padding:10px 6px;border:none;border-radius:0;font-size:15px;resize:none;max-height:160px;font-family:inherit;line-height:1.45;background:transparent;color:var(--text)}.chat-input:focus{outline:none}.chat-input::placeholder{color:var(--text-muted)}.chat-send-btn{width:40px;height:40px;border-radius:50%;background:color-mix(in srgb,var(--text) 12%,transparent);color:var(--text-muted);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .15s,color .15s,transform 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