:root{--sidebar-width: 240px;--topbar-height: 108px;--sidebar-from: #1B3A5C;--sidebar-to: #2A8B9A;--sidebar-header-bg: rgba(255,255,255,.08);--sidebar-hover: rgba(255,255,255,.08);--sidebar-active-bg: #FFFFFF;--sidebar-active-text: #1B3A5C;--sidebar-text: rgba(255,255,255,.88);--sidebar-muted: rgba(255,255,255,.45);--sidebar-border: rgba(255,255,255,.1);--primary: #1B3A5C;--primary-dark: #122840;--primary-light: #2A8B9A;--primary-bg: #EDF4F8;--primary-ring: rgba(27,58,92,.2);--accent: #D4AF37;--bg: #F4F6F9;--card: #FFFFFF;--border: #D8DFE8;--border-light: #EDF0F5;--text: #1B2D3E;--text-secondary: #4A5E72;--text-muted: #8A9BB0;--shadow-xs: 0 1px 2px rgba(0,0,0,.06);--shadow-sm: 0 1px 4px rgba(0,0,0,.08);--shadow-md: 0 4px 16px rgba(0,0,0,.08);--shadow-lg: 0 8px 32px rgba(0,0,0,.1);--radius-sm: 6px;--radius: 10px;--radius-lg: 16px;--radius-full: 9999px;--success: #16A34A;--success-bg: #F0FDF4;--success-border: #BBF7D0;--warning: #D97706;--warning-bg: #FFFBEB;--warning-border: #FDE68A;--danger: #DC2626;--danger-bg: #FEF2F2;--danger-border: #FECACA;--info: #2563EB;--info-bg: #EFF6FF;--info-border: #BFDBFE;--font: "Segoe UI", system-ui, -apple-system, sans-serif;--transition: .18s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:15px}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;font-weight:500;-webkit-font-smoothing:antialiased}.app-shell{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-width);height:100vh;max-height:100vh;background:linear-gradient(135deg,var(--sidebar-from),var(--sidebar-to));display:flex;flex-direction:column;position:fixed;top:0;left:0;z-index:100;flex-shrink:0;overflow:hidden}.sidebar-header{display:flex;align-items:center;gap:10px;height:var(--topbar-height);padding:0 20px;background:var(--sidebar-header-bg);border-bottom:1px solid var(--sidebar-border)}.sidebar-logo-icon{width:36px;height:36px;background:#ffffff26;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.sidebar-brand{color:var(--sidebar-text);font-size:1.1rem;font-weight:700;letter-spacing:.3px;line-height:1.3}.sidebar-brand .brand-name{display:block;font-size:1.15rem;font-weight:800;letter-spacing:.5px}.sidebar-brand .brand-name span{color:#d4af37;font-weight:800;display:inline;font-size:inherit}.sidebar-brand .brand-slogan{display:block;font-size:.78rem;font-weight:500;color:#fffc;margin-top:2px;letter-spacing:.3px}.sidebar-nav{flex:1;min-height:0;padding:12px 10px;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.3) transparent}.sidebar-nav::-webkit-scrollbar{width:6px}.sidebar-nav::-webkit-scrollbar-thumb{background:#ffffff40;border-radius:3px}.sidebar-nav::-webkit-scrollbar-thumb:hover{background:#fff6}.nav-section-label{color:var(--sidebar-muted);font-size:.68rem;font-weight:600;letter-spacing:.8px;text-transform:uppercase;padding:14px 10px 6px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);color:var(--sidebar-text);text-decoration:none;font-size:.875rem;font-weight:500;cursor:pointer;transition:background var(--transition),color var(--transition),border-color var(--transition),box-shadow var(--transition);margin-bottom:2px;border:1.5px solid transparent;background:none;width:100%;text-align:left}.nav-item:hover{background:var(--sidebar-hover)}.nav-item.active{background:transparent;color:var(--sidebar-text);font-weight:700;border-color:#ff8a3d;box-shadow:0 0 8px #ff8a3da6,inset 0 0 5px #ff8a3d2e}.nav-icon{opacity:.8;flex-shrink:0}.nav-item.active .nav-icon{color:#ff8a3d;opacity:1}.nav-badge{margin-left:auto;background:var(--primary-light);color:#fff;font-size:.68rem;font-weight:700;padding:1px 7px;border-radius:var(--radius-full)}.sidebar-footer{padding:14px 10px;border-top:1px solid var(--sidebar-border)}.sidebar-user{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);cursor:pointer}.sidebar-user:hover{background:var(--sidebar-hover)}.avatar{width:34px;height:34px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--primary-light),var(--primary-dark));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.8rem;flex-shrink:0}.sidebar-user-info{flex:1;min-width:0}.sidebar-user-name{color:#fff;font-size:.8rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-user-role{color:var(--sidebar-muted);font-size:.7rem}.main-content{margin-left:var(--sidebar-width);flex:1;display:flex;flex-direction:column;min-height:100vh}.topbar{height:var(--topbar-height);background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 24px;gap:16px;position:sticky;top:0;z-index:50;box-shadow:var(--shadow-xs)}.topbar-title{font-size:1.1rem;font-weight:700;color:var(--text);flex:1;min-width:0}.topbar-subtitle{font-size:.75rem;color:#000;font-weight:700}.topbar-search{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-full);padding:7px 14px;color:var(--text-muted);font-size:.85rem;min-width:220px}.topbar-search input{border:none;background:none;outline:none;color:var(--text);font-size:.85rem;width:100%}.icon-btn{width:36px;height:36px;border-radius:var(--radius-full);border:1px solid var(--border);background:var(--card);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-secondary);transition:background var(--transition);flex-shrink:0}.icon-btn:hover{background:var(--bg)}.page-body{padding:24px 24px 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var(--transition)}.auth-method-pill:hover{transform:translateY(-1px)}.auth-method-pill__icon{width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:999px}.auth-method-pill__label{flex:1;text-align:center;font-size:.98rem;font-weight:500;letter-spacing:.01em;transform:translate(-18px)}@media (max-width: 768px){.auth-method-pill__label{font-size:.92rem;transform:translate(-12px)}}.alert{padding:10px 14px;border-radius:var(--radius-sm);font-size:.83rem;margin-bottom:16px;display:flex;align-items:center;gap:8px}.alert-error{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger-border)}.alert-success{background:var(--success-bg);color:var(--success);border:1px solid var(--success-border)}.chat-layout{display:flex;gap:0;height:calc(100vh - var(--topbar-height) - 48px)}.chat-contacts{width:280px;flex-shrink:0;border:1px solid var(--border);border-radius:var(--radius) 0 0 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var(--transition)}.chat-input::placeholder{color:var(--text-muted)}.chat-input:focus{border-color:var(--primary)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;color:var(--text-muted);text-align:center}.empty-state-icon{margin-bottom:14px;opacity:.4}.empty-state h3{font-size:1rem;font-weight:600;color:var(--text-secondary)}.empty-state p{font-size:.82rem;margin-top:6px}.search-bar{display:flex;align-items:center;gap:8px;border:1.5px solid var(--border);border-radius:var(--radius-sm);padding:7px 12px;background:var(--card);color:var(--text-muted);min-width:240px}.search-bar input{border:none;background:none;outline:none;font-size:.855rem;color:var(--text);width:100%}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.divider{border:none;border-top:1px solid var(--border);margin:16px 0}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.spin{animation:spin .8s linear infinite}.sidebar-backdrop{display:none}@media (max-width: 768px){.sidebar{transform:translate(-100%);transition:transform .25s ease;z-index:1000}.sidebar.open{transform:none}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:999}.main-content{margin-left:0}.topbar{height:auto;min-height:60px;padding:10px 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var(--border);background:var(--card);color:var(--text);font-size:1.3rem;font-weight:800;cursor:pointer;box-shadow:0 1px 3px #0000000f;transition:transform .06s ease,background .15s,border-color .15s}.pay-key:hover{background:var(--primary-bg);border-color:var(--primary)}.pay-key:active{transform:scale(.94)}