:root{--neutral-0: #ffffff;--neutral-50: #f6f8f7;--neutral-100: #eef2f0;--neutral-200: #dee5e2;--neutral-300: #c5d1cc;--neutral-400: #9aa8a3;--neutral-500: #6a7873;--neutral-600: #4a5752;--neutral-700: #303a36;--neutral-800: #1c2522;--neutral-900: #0e1916;--primary-50: #e7f6f2;--primary-100: #c5ebe1;--primary-300: #59bba6;--primary-500: #129382;--primary-600: #108b7c;--primary-700: #0a6f63;--success-500: #1a9c47;--success-600: #16a34a;--warning-500: #d39312;--danger-500: #d8483a;--danger-600: #c2410c;--bg: var(--neutral-50);--surface: var(--neutral-0);--surface-2: var(--neutral-100);--border: var(--neutral-200);--text: var(--neutral-900);--text-soft: var(--neutral-600);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;font-family:Inter,Segoe UI Variable,Segoe UI,system-ui,-apple-system,sans-serif;font-feature-settings:"ss01" on,"cv11" on;color-scheme:light}@media (prefers-color-scheme: dark){:root{--bg: #0e1916;--surface: #161f1c;--surface-2: #1c2522;--border: #303a36;--text: #eef2f0;--text-soft: #9aa8a3;color-scheme:dark}}*{box-sizing:border-box}html,body{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}button{font:inherit;cursor:pointer}input,textarea,select{font:inherit;color:inherit}#app{height:100vh;display:flex;flex-direction:column}.btn{border:1px solid transparent;background:var(--surface-2);color:var(--text);padding:8px 14px;border-radius:var(--radius-sm);transition:background .15s,border-color .15s,transform .05s}.btn:hover{background:var(--neutral-200)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--primary-600);color:var(--neutral-0);border-color:var(--primary-600)}.btn-primary:hover{background:var(--primary-700)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{background:var(--surface);border-color:var(--border)}.btn-secondary:hover{background:var(--surface-2)}.btn-link{background:transparent;color:var(--primary-600);border:none;padding:4px 6px;text-decoration:underline}.btn-link:hover{color:var(--primary-700);background:transparent}.btn-icon{background:transparent;border:1px solid var(--border);width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm)}.btn-danger{background:var(--danger-500);color:var(--neutral-0);border-color:var(--danger-500)}.btn-danger:hover{background:var(--danger-600)}.field{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;outline:none;transition:border-color .15s,box-shadow .15s}.field:focus{border-color:var(--primary-500);box-shadow:0 0 0 3px var(--primary-100)}textarea.field{resize:vertical;min-height:60px}.field-label{display:block;font-size:12px;color:var(--text-soft);margin-bottom:4px}.auth-shell{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,var(--primary-50),var(--bg))}.auth-card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:32px;width:100%;max-width:360px}.login-form{display:flex;flex-direction:column;gap:10px}.login-title{margin:0;font-size:20px}.login-subtitle{margin:0 0 8px;color:var(--text-soft)}.login-error{color:var(--danger-500);font-size:13px}.loading-screen{display:flex;align-items:center;justify-content:center;min-height:100vh;color:var(--text-soft)}.onboarding{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:40px}.onboarding-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;text-align:center;max-width:480px;width:100%;box-shadow:var(--shadow-md)}.onboarding-title{margin-top:0}.onboarding-step{color:var(--text-soft)}.onboarding-status{display:inline-block;margin:12px 0;padding:4px 10px;border-radius:999px;background:var(--surface-2);font-size:13px}.status-connected{background:var(--success-500);color:var(--neutral-0)}.status-qr{background:var(--primary-500);color:var(--neutral-0)}.status-error,.status-logged_out{background:var(--danger-500);color:var(--neutral-0)}.qr-wrap{padding:16px}.qr-img{width:256px;height:256px;image-rendering:pixelated;border:1px solid var(--border);border-radius:var(--radius-md);background:#fff}.qr-placeholder{width:256px;height:256px;display:inline-flex;align-items:center;justify-content:center;border:2px dashed var(--border);border-radius:var(--radius-md);color:var(--text-soft);margin:16px auto}.qr-hint{color:var(--text-soft);font-size:13px;margin-top:8px}.onboarding-actions{display:flex;gap:10px;justify-content:center;margin-top:16px}.shell{flex:1;display:flex;flex-direction:column;min-height:0}.shell-body{flex:1;display:flex;min-height:0}.topbar{display:grid;grid-template-columns:1fr auto 320px auto;align-items:center;gap:16px;padding:10px 18px;background:var(--surface);border-bottom:1px solid var(--border)}.topbar-brand{display:flex;align-items:center;gap:10px;font-weight:600}.topbar-mark{background:var(--primary-600);color:var(--neutral-0);border-radius:6px;padding:4px 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.chat-name{font-weight:600}.chat-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary-300);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600}.chat-avatar-lg{width:44px;height:44px}.chat-meta{min-width:0;display:flex;flex-direction:column;gap:4px}.chat-row{display:flex;justify-content:space-between;gap:8px;min-width:0}.chat-name{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-time{font-size:11px;color:var(--text-soft);flex-shrink:0}.chat-preview{color:var(--text-soft);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-badge{background:var(--success-500);color:#fff;font-size:11px;padding:1px 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