:root{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-tertiary: #f1f5f9;--bg-input: #ffffff;--border: #e2e8f0;--border-light: #f1f5f9;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-dim: rgba(37,99,235,.08);--accent-border: rgba(37,99,235,.2);--red: #ef4444;--red-dim: rgba(239,68,68,.08);--green: #22c55e;--green-dim: rgba(34,197,94,.08);--yellow: #eab308;--yellow-dim: rgba(234,179,8,.08);--purple: #8b5cf6;--purple-dim: rgba(139,92,246,.08);--orange: #f97316;--orange-dim: rgba(249,115,22,.08);--shadow-sm: 0 1px 2px rgba(0,0,0,.05);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);--shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04);--sidebar-w: 264px;--header-h: 64px;--radius: 12px;--radius-lg: 16px;--radius-xl: 20px}[data-theme=dark]{--bg-primary: #0B0F19;--bg-secondary: #111827;--bg-tertiary: #1e293b;--bg-input: #1e293b;--border: #1e293b;--border-light: #1e293b;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #3b82f6;--accent-hover: #2563eb;--accent-dim: rgba(59,130,246,.12);--accent-border: rgba(59,130,246,.25);--red-dim: rgba(239,68,68,.12);--green-dim: rgba(34,197,94,.12);--yellow-dim: rgba(234,179,8,.12);--purple-dim: rgba(139,92,246,.12);--orange-dim: rgba(249,115,22,.12);--shadow-sm: 0 1px 2px rgba(0,0,0,.2);--shadow-md: 0 4px 6px -1px rgba(0,0,0,.3);--shadow-lg: 0 10px 15px -3px rgba(0,0,0,.4)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;transition:background .3s,color .3s}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);background:var(--bg-secondary);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;height:100vh;left:0;top:0;z-index:100;transition:background .3s,border-color .3s}.sidebar-header{padding:24px 20px 20px;border-bottom:1px solid var(--border)}.sidebar-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}.sidebar-logo-icon{width:36px;height:36px;background:linear-gradient(135deg,#2563eb,#4f46e5);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.sidebar-logo-text{font-size:1.25rem;font-weight:700;letter-spacing:-.5px}.sidebar-logo-text span{color:var(--accent)}.sidebar-nav{flex:1;padding:12px;display:flex;flex-direction:column;gap:2px;overflow-y:auto}.sidebar-section-label{font-size:.7rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;padding:16px 12px 6px}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;color:var(--text-secondary);text-decoration:none;border-radius:10px;font-size:.875rem;font-weight:500;transition:all .15s;position:relative}.nav-item:hover{background:var(--bg-tertiary);color:var(--text-primary)}.nav-item.active{background:var(--accent-dim);color:var(--accent);font-weight:600}.nav-item.active:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:20px;background:var(--accent);border-radius:0 3px 3px 0}.nav-item svg{width:18px;height:18px;flex-shrink:0}.sidebar-footer{padding:12px;border-top:1px solid var(--border)}.user-card{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;background:var(--bg-tertiary);margin-bottom:8px}.user-avatar{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#2563eb,#4f46e5);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0}.user-meta{overflow:hidden;flex:1}.u-name{font-size:.85rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.u-plan{font-size:.7rem;color:var(--accent);text-transform:uppercase;letter-spacing:.5px;font-weight:600}.btn-logout{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:9px;border-radius:10px;background:var(--red-dim);color:var(--red);text-decoration:none;font-size:.82rem;font-weight:600;border:1px solid rgba(239,68,68,.15);transition:all .15s;cursor:pointer}.btn-logout:hover{background:#ef444426}.main-area{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column;min-height:100vh}.top-header{height:var(--header-h);background:var(--bg-secondary);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:50;transition:background .3s,border-color .3s}.header-title{font-size:1.1rem;font-weight:700;color:var(--text-primary)}.header-actions{display:flex;align-items:center;gap:8px}.header-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .15s}.header-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.header-btn.active{background:var(--accent-dim);color:var(--accent);border-color:var(--accent-border)}.main-content{padding:28px 32px;flex:1}.page-title{font-size:1.5rem;font-weight:700;margin-bottom:4px;letter-spacing:-.3px;color:var(--text-primary)}.page-sub{font-size:.875rem;color:var(--text-muted);margin-bottom:24px}.card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);transition:all .2s}.card:hover{box-shadow:var(--shadow-md)}.card-dark{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);transition:all .2s}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:24px}.stat-card{display:flex;align-items:center;gap:14px}.stat-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.stat-icon svg{width:20px;height:20px}.stat-icon.blue{background:var(--accent-dim);color:var(--accent)}.stat-icon.green{background:var(--green-dim);color:var(--green)}.stat-icon.purple{background:var(--purple-dim);color:var(--purple)}.stat-icon.orange{background:var(--orange-dim);color:var(--orange)}.stat-num{font-size:1.6rem;font-weight:700;line-height:1;color:var(--text-primary)}.stat-label{font-size:.78rem;color:var(--text-muted);margin-top:2px}.stat-change{font-size:.72rem;font-weight:600;padding:2px 6px;border-radius:6px;margin-left:8px}.stat-change.up{background:var(--green-dim);color:var(--green)}.stat-change.down{background:var(--red-dim);color:var(--red)}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.status-dot.on{background:var(--green);box-shadow:0 0 6px var(--green);animation:pulse 2s infinite}.status-dot.off{background:var(--red)}@keyframes pulse{0%,to{opacity:1}50%{opacity:.4}}.form-input{background:var(--bg-input);border:1px solid var(--border);color:var(--text-primary);border-radius:10px;padding:10px 14px;font-family:inherit;font-size:.875rem;width:100%;transition:all .15s}.form-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.form-input::placeholder{color:var(--text-muted)}.form-dark{background:var(--bg-input);border:1px solid var(--border);color:var(--text-primary);border-radius:10px;padding:10px 14px;font-family:inherit;font-size:.875rem;width:100%;transition:all .15s}.form-dark:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}.form-dark::placeholder{color:var(--text-muted)}.form-label,.form-label-dark{font-size:.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:6px;display:block}.btn-primary{background:var(--accent);color:#fff;border:none;padding:10px 20px;border-radius:10px;font-weight:600;font-size:.875rem;cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:8px;font-family:inherit}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-green{background:var(--accent);color:#fff;border:none;padding:10px 20px;border-radius:10px;font-weight:600;font-size:.875rem;cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:8px;font-family:inherit}.btn-green:hover{background:var(--accent-hover);transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--text-secondary);border:1px solid var(--border);padding:10px 20px;border-radius:10px;font-weight:600;font-size:.875rem;cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:8px;font-family:inherit}.btn-outline:hover{background:var(--bg-tertiary);color:var(--text-primary);border-color:var(--text-muted)}.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:20px;font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.3px}.badge.green{background:var(--green-dim);color:var(--green);border:1px solid rgba(34,197,94,.2)}.badge.red{background:var(--red-dim);color:var(--red);border:1px solid rgba(239,68,68,.2)}.badge.yellow{background:var(--yellow-dim);color:var(--yellow);border:1px solid rgba(234,179,8,.2)}.badge.blue{background:var(--accent-dim);color:var(--accent);border:1px solid var(--accent-border)}.badge.purple{background:var(--purple-dim);color:var(--purple);border:1px solid rgba(139,92,246,.2)}.toast-v{position:fixed;bottom:-80px;right:24px;background:var(--bg-secondary);border:1px solid var(--accent);color:var(--text-primary);padding:14px 20px;border-radius:var(--radius);display:flex;align-items:center;gap:12px;z-index:9999;transition:bottom .4s cubic-bezier(.68,-.55,.27,1.55);font-size:.88rem;font-weight:600;min-width:260px;box-shadow:var(--shadow-lg)}.toast-v.show{bottom:24px}.toast-v.error{border-color:var(--red)}.chat-layout{display:flex;height:calc(100vh - var(--header-h));gap:0}.chat-sidebar{width:340px;border-right:1px solid var(--border);display:flex;flex-direction:column;background:var(--bg-secondary)}.chat-main{flex:1;display:flex;flex-direction:column;background:var(--bg-primary)}.contact-item{display:flex;align-items:center;gap:12px;padding:14px 16px;cursor:pointer;transition:background .15s;border-bottom:1px solid var(--border-light)}.contact-item:hover{background:var(--bg-tertiary)}.contact-item.active{background:var(--accent-dim)}.msg-bubble{max-width:70%;padding:10px 14px;border-radius:var(--radius);font-size:.875rem;line-height:1.5;margin-bottom:8px;word-wrap:break-word}.msg-bubble.user{background:var(--accent-dim);border:1px solid var(--accent-border);margin-left:auto;color:var(--text-primary)}.msg-bubble.assistant{background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-primary)}.msg-time{font-size:.7rem;color:var(--text-muted);margin-top:4px}.msg-area{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column}.msg-input-bar{display:flex;gap:10px;padding:16px 20px;border-top:1px solid var(--border);background:var(--bg-secondary)}.data-table{width:100%;border-collapse:collapse}.data-table th{text-align:left;padding:10px 0;font-size:.78rem;font-weight:600;color:var(--text-muted);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.3px}.data-table td{padding:12px 0;font-size:.875rem;color:var(--text-primary);border-bottom:1px solid var(--border-light)}.data-table tr:hover td{background:var(--bg-tertiary)}.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 svg{width:48px;height:48px;margin-bottom:16px;opacity:.4}.empty-state p{font-size:.9rem}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@media(max-width:992px){.sidebar{transform:translate(-100%)}.main-area{margin-left:0}.main-content{padding:20px 16px}}