.skeleton{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0,#f0f0f0 75%);background-size:200% 100%;animation:loading 1.5s ease-in-out infinite;border-radius:4px}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-text{height:16px;margin-bottom:8px}.skeleton-title{height:20px;margin-bottom:12px}.skeleton-avatar{width:40px;height:40px;border-radius:50%;flex-shrink:0}.skeleton-image{width:100%;height:150px;border-radius:8px}.skeleton-card{width:100%;height:200px;border-radius:8px}.product-skeleton-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;padding:16px}.product-skeleton-card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06)}.product-skeleton-content{padding:12px}.list-skeleton{display:flex;flex-direction:column;gap:16px;padding:16px}.list-skeleton-item{display:flex;gap:12px;align-items:center;padding:16px;background:#fff;border-radius:8px}.list-skeleton-content{flex:1}@media (max-width: 768px){.product-skeleton-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:12px;padding:12px}}.page-skeleton{padding:20px;min-height:400px}.page-skeleton-content{max-width:1200px;margin:0 auto}.page-skeleton-body{margin-top:24px;display:flex;flex-direction:column;gap:16px}@media (max-width: 768px){.page-skeleton{padding:16px}}.theme-toggle{position:relative;display:inline-block}.theme-toggle-btn{width:40px;height:40px;border-radius:50%;background:var(--bg-secondary, #f5f5f5);border:1px solid var(--border-color, #e0e0e0);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s ease}.theme-toggle-btn:hover{background:var(--bg-hover, #f0f0f0);border-color:var(--primary-color, #667eea);transform:scale(1.05)}.theme-icon{font-size:20px}.theme-dropdown{position:absolute;top:calc(100% + 8px);right:0;background:var(--card-bg, #ffffff);border:1px solid var(--border-color, #e0e0e0);border-radius:8px;box-shadow:var(--shadow-md, 0 4px 12px rgba(0, 0, 0, .15));min-width:120px;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .3s ease;z-index:1000;overflow:hidden}.theme-toggle:hover .theme-dropdown{opacity:1;visibility:visible;transform:translateY(0)}.theme-option{display:flex;align-items:center;gap:8px;padding:10px 16px;cursor:pointer;transition:all .2s ease;color:var(--text-primary, #333)}.theme-option:hover{background:var(--bg-hover, #f0f0f0)}.theme-option.active{background:var(--bg-hover, #f0f0f0);color:var(--primary-color, #667eea)}.theme-option-icon{font-size:18px}.theme-option-name{flex:1;font-size:14px}.theme-check{font-size:14px;color:var(--primary-color, #667eea)}:root[data-theme=tech] .theme-toggle-btn{background:var(--bg-secondary);border-color:var(--border-color);box-shadow:var(--shadow-sm)}:root[data-theme=tech] .theme-toggle-btn:hover{border-color:var(--primary-color);box-shadow:var(--glow-md)}:root[data-theme=tech] .theme-dropdown{background:var(--card-bg);border-color:var(--border-color);box-shadow:var(--shadow-lg)}:root[data-theme=tech] .theme-option:hover{background:var(--bg-hover)}:root[data-theme=tech] .theme-option.active{background:var(--bg-hover);color:var(--primary-color);text-shadow:var(--glow-sm)}.header{background-color:var(--card-bg);padding:0 16px;box-shadow:var(--shadow-sm);position:fixed;top:0;left:0;right:0;z-index:1000;width:100%;box-sizing:border-box;height:60px;display:flex;align-items:center;transition:background-color .3s ease,box-shadow .3s ease}.header-content{display:flex;align-items:center;gap:8px;max-width:100%;width:100%}.home-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:8px;transition:all .2s;background:var(--bg-secondary);font-size:20px;flex-shrink:0;-webkit-user-select:none;-moz-user-select:-moz-none;user-select:none}.home-btn:hover{background:var(--bg-hover);transform:scale(1.05)}.home-btn:active{transform:scale(.95)}.search-bar{flex:1;min-width:0;display:flex;align-items:center;background-color:var(--bg-secondary);border-radius:20px;padding:8px 12px;gap:6px;border:1px solid var(--border-light);transition:all .3s ease}.search-icon{font-size:16px;color:var(--text-muted);-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}.search-bar input{flex:1;border:none;background:transparent;font-size:16px;outline:none;color:var(--text-primary)}.search-bar input::placeholder{color:var(--text-muted)}@media (max-width: 768px){.search-bar input{font-size:16px}}.clear-icon{font-size:16px;color:var(--text-muted);cursor:pointer;padding:4px;-webkit-tap-highlight-color:transparent;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;transition:all .2s ease;border-radius:50%;display:flex;align-items:center;justify-content:center;width:24px;height:24px;flex-shrink:0;z-index:1}.clear-icon:hover{background:var(--bg-hover);color:var(--text-primary);transform:scale(1.1)}.clear-icon:active{transform:scale(.9)}.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}.function-menu-container{position:relative}.function-menu-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:8px;transition:all .2s;background:var(--bg-secondary)}.function-menu-btn:hover{background:var(--bg-hover)}.function-menu-btn:active{transform:scale(.95)}.menu-icon{font-size:20px;color:var(--text-primary);-webkit-user-select:none;-moz-user-select:-moz-none;user-select:none;font-weight:600}.function-dropdown{position:absolute;top:45px;right:0;left:auto;background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;box-shadow:var(--shadow-md);min-width:180px;z-index:1001;overflow:hidden;opacity:0;visibility:hidden;transform:translateZ(0);backface-visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out}.function-dropdown.show{opacity:1;visibility:visible}.menu-item{display:flex;align-items:center;padding:14px 16px;cursor:pointer;transition:all .2s;position:relative}.menu-item:hover,.menu-item:active{background:var(--bg-hover)}.menu-item-icon{font-size:18px;margin-right:12px;width:20px;text-align:center}.menu-item-text{font-size:14px;color:var(--text-primary);flex:1;font-weight:500}.menu-badge{background:var(--error-color);color:#fff;font-size:11px;padding:2px 7px;border-radius:12px;min-width:18px;text-align:center;font-weight:600}.menu-divider{height:1px;background:var(--border-color);margin:6px 12px}.menu-btn{background:none;border:none;font-size:24px;cursor:pointer;padding:4px;color:#333}.cart-icon{position:relative;cursor:pointer;padding:4px;-webkit-tap-highlight-color:transparent;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none}.cart-icon .icon{font-size:24px;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}.cart-badge{position:absolute;top:0;right:0;background-color:#f44;color:#fff;border-radius:10px;padding:2px 6px;font-size:11px;font-weight:700;min-width:18px;text-align:center;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}.add-product-icon{position:relative;cursor:pointer;padding:4px;-webkit-tap-highlight-color:transparent;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;transition:transform .2s}.add-product-icon:active{transform:scale(.9)}.add-product-icon .icon{font-size:24px;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}.performance-icon{position:relative;cursor:pointer;padding:4px;-webkit-tap-highlight-color:transparent;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;transition:transform .2s}.performance-icon:active{transform:scale(.9)}.performance-icon .icon{font-size:24px;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}.manage-icon{position:relative;cursor:pointer;padding:4px;-webkit-tap-highlight-color:transparent;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;transition:transform .2s}.manage-icon:active{transform:scale(.9)}.manage-icon .icon{font-size:24px;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}.batch-import-icon{position:relative;cursor:pointer;padding:4px;-webkit-tap-highlight-color:transparent;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;transition:transform .2s}.batch-import-icon:active{transform:scale(.9)}.batch-import-icon .icon{font-size:24px;-moz-user-select:-moz-none;user-select:none;-webkit-user-select:none;pointer-events:none}@media (max-width: 768px){.header{padding:14px 12px}.header-content{gap:6px}.search-bar{padding:6px 10px;gap:4px}.search-icon,.search-bar input{font-size:14px}.search-bar input::placeholder{font-size:14px}.clear-icon{font-size:14px;padding:2px}.header-actions{gap:4px}.performance-icon,.manage-icon,.batch-import-icon,.add-product-icon,.cart-icon{padding:2px}.performance-icon .icon,.manage-icon .icon,.batch-import-icon .icon,.add-product-icon .icon,.cart-icon .icon{font-size:20px}.cart-badge{font-size:10px;padding:1px 4px;min-width:16px}}@media (max-width: 375px){.header{padding:8px 10px}.header-content{gap:4px}.search-bar{padding:5px 8px}.search-bar input::placeholder{font-size:13px}.header-actions{gap:2px}.performance-icon .icon,.manage-icon .icon,.batch-import-icon .icon,.add-product-icon .icon,.cart-icon .icon{font-size:18px}}.user-menu-container{position:relative}.user-avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s}.user-avatar:hover{transform:scale(1.1);box-shadow:0 4px 12px rgba(102,126,234,.4)}.avatar-icon{font-size:20px;filter:brightness(0) invert(1)}.user-dropdown{position:absolute;top:calc(100% + 8px);right:0;left:auto;background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;box-shadow:var(--shadow-md);min-width:200px;z-index:1001;opacity:0;visibility:hidden;transform:translateZ(0);backface-visibility:hidden;transition:opacity .2s ease-out,visibility .2s ease-out}.user-dropdown.show{opacity:1;visibility:visible}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.user-info{padding:16px}.user-name{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:4px}.user-role{font-size:12px;color:var(--text-secondary)}.dropdown-divider{height:1px;background:var(--border-color);margin:0 8px}.logout-btn{width:100%;padding:12px 16px;background:none;border:none;text-align:left;cursor:pointer;display:flex;align-items:center;gap:8px;color:var(--error-color);font-size:14px;transition:all .2s;border-radius:0 0 8px 8px}.logout-btn:hover{background:var(--bg-hover)}.logout-icon{font-size:16px}.user-manage-icon{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,gold,#ffed4e);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s;position:relative}.user-manage-icon:hover{transform:scale(1.1);box-shadow:0 4px 12px rgba(255,215,0,.4)}.sidebar{width:200px;min-width:200px;background:var(--card-bg);border-right:1px solid var(--border-color);height:calc(100vh - 60px);position:-webkit-sticky;position:sticky;top:60px;transition:background .3s ease,border-color .3s ease}.sidebar-nav{padding:16px 0}.nav-item{display:flex;align-items:center;padding:12px 20px;cursor:pointer;transition:all .2s;color:var(--text-secondary);position:relative}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{background:var(--bg-hover);color:var(--primary-color);border-right:3px solid var(--primary-color)}.nav-icon{font-size:18px;margin-right:12px}.nav-label{font-size:14px;font-weight:500}.nav-badge{position:absolute;right:16px;background:var(--error-color);color:#fff;font-size:12px;padding:2px 8px;border-radius:10px;min-width:20px;text-align:center}@media (max-width: 768px){.sidebar{width:60px;min-width:60px}.nav-item{padding:12px;justify-content:center}.nav-label{display:none}.nav-icon{margin-right:0;font-size:20px}.nav-badge{right:8px;top:8px;padding:1px 5px;font-size:10px}}.toast-container{position:fixed;top:20px;left:50%;transform:translate(-50%);z-index:9999;pointer-events:none;animation:toastSlideDown .3s ease-out}.toast{background:#fff;color:#333;padding:16px 24px;border-radius:12px;border:1px solid #e0e0e0;display:flex;align-items:center;gap:12px;box-shadow:0 8px 32px rgba(0,0,0,.12);min-width:200px;justify-content:center;transition:all .3s ease}.toast-icon{width:24px;height:24px;background:#28a745;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0;animation:checkmark .5s ease-out}.toast-icon.error{background:#dc3545}.toast.error{background:#fff;border:1px solid #dc3545;color:#dc3545}.toast-message{font-size:15px;font-weight:500}@keyframes toastSlideDown{0%{opacity:0;transform:translate(-50%) translateY(-20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@keyframes toastSlideIn{0%{opacity:0;transform:translate(-50%,-50%) scale(.8)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}@keyframes checkmark{0%{transform:scale(0) rotate(-45deg)}50%{transform:scale(1.2) rotate(0)}to{transform:scale(1) rotate(0)}}.offline-indicator{position:fixed;top:70px;left:50%;transform:translate(-50%);z-index:9999;padding:12px 24px;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.15);animation:slideDown .3s ease-out}.offline-indicator.offline{background:#ff4d4f;color:#fff}.offline-indicator.reconnected{background:#52c41a;color:#fff}.offline-content{display:flex;align-items:center;gap:8px}.offline-icon{font-size:18px}.offline-text{font-size:14px;font-weight:500}.offline-subtext{font-size:12px;opacity:.9;margin-left:8px}@keyframes slideDown{0%{opacity:0;transform:translate(-50%) translateY(-20px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@media (max-width: 768px){.offline-indicator{top:60px;left:16px;right:16px;transform:none;padding:10px 16px}.offline-text{font-size:13px}.offline-subtext{font-size:11px}}.app{min-height:100vh;background-color:var(--body-bg);transition:background-color .3s ease}.page-content{flex:1;overflow-y:auto;display:flex;flex-direction:column;padding-top:60px}.content-wrapper{display:flex;gap:0;padding:0;max-width:1400px;margin:0 auto;width:100%;box-sizing:border-box;position:relative}.content-wrapper.search-mode{justify-content:center}.content-wrapper.search-mode .product-list{max-width:800px;margin:0 auto;width:100%}@media (max-width: 768px){.app{overflow-x:hidden;max-width:100vw}.page-content{width:100%;max-width:100vw;overflow-x:hidden;padding-top:60px}.content-wrapper{gap:0;margin:0;max-width:100%;width:100%;padding:0}.content-wrapper.search-mode .product-list{margin:0 12px;max-width:none;padding:8px 0 80px;width:calc(100% - 24px)}}@media (min-width: 769px){.content-wrapper{max-width:1400px;margin:0 auto}.content-wrapper.search-mode .product-list{max-width:800px;margin:20px auto 0}}.error-boundary{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);padding:20px}.error-container{background:#fff;border-radius:16px;padding:48px 32px;max-width:600px;width:100%;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.3)}.error-icon{font-size:80px;margin-bottom:24px;animation:shake .5s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-10px) rotate(-5deg)}75%{transform:translate(10px) rotate(5deg)}}.error-title{font-size:32px;color:#333;margin-bottom:16px;font-weight:700}.error-message{font-size:16px;color:#666;margin-bottom:32px;line-height:1.6}.error-details{text-align:left;margin:24px 0;padding:16px;background:#f5f5f5;border-radius:8px;border:1px solid #e0e0e0}.error-details summary{cursor:pointer;font-weight:600;color:#666;padding:8px;-webkit-user-select:none;-moz-user-select:-moz-none;user-select:none}.error-details summary:hover{color:#333}.error-stack{margin-top:16px;font-size:12px}.error-stack p{margin:8px 0;color:#666}.error-stack pre{background:#fff;padding:12px;border-radius:4px;overflow-x:auto;font-family:Courier New,monospace;font-size:11px;line-height:1.5;color:#d32f2f;border:1px solid #ffcdd2}.error-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.error-btn{padding:12px 32px;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .3s}.error-btn.primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.error-btn.primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(102,126,234,.4)}.error-btn.secondary{background:#f5f5f5;color:#666}.error-btn.secondary:hover{background:#e0e0e0}.error-btn:active{transform:translateY(0)}@media (max-width: 768px){.error-container{padding:32px 24px}.error-icon{font-size:60px}.error-title{font-size:24px}.error-message{font-size:14px}.error-actions{flex-direction:column}.error-btn{width:100%}}:root{--primary-color: #667eea;--primary-dark: #5568d3;--primary-light: #7c8ef0;--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #fafafa;--bg-hover: #f0f0f0;--border-color: #e0e0e0;--border-light: #f0f0f0;--border-dark: #d0d0d0;--text-primary: #333333;--text-secondary: #666666;--text-muted: #999999;--text-disabled: #cccccc;--success-color: #52c41a;--warning-color: #faad14;--error-color: #ff4d4f;--info-color: #1890ff;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 12px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .2);--body-bg: #f5f5f5;--card-bg: #ffffff}:root[data-theme=default]{--primary-color: #667eea;--primary-dark: #5568d3;--primary-light: #7c8ef0;--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #fafafa;--bg-hover: #f0f0f0;--border-color: #e0e0e0;--border-light: #f0f0f0;--border-dark: #d0d0d0;--text-primary: #333333;--text-secondary: #666666;--text-muted: #999999;--text-disabled: #cccccc;--success-color: #52c41a;--warning-color: #faad14;--error-color: #ff4d4f;--info-color: #1890ff;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .1);--shadow-md: 0 4px 12px rgba(0, 0, 0, .15);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .2);--body-bg: #f5f5f5;--card-bg: #ffffff}:root[data-theme=tech]{--primary-color: #00ffff;--primary-dark: #00cccc;--primary-light: #66ffff;--bg-primary: rgba(10, 14, 39, .95);--bg-secondary: rgba(10, 14, 39, .8);--bg-tertiary: rgba(10, 14, 39, .6);--bg-hover: rgba(0, 255, 255, .05);--border-color: rgba(0, 255, 255, .2);--border-light: rgba(0, 255, 255, .1);--border-dark: rgba(0, 255, 255, .3);--text-primary: #ffffff;--text-secondary: rgba(255, 255, 255, .8);--text-muted: rgba(255, 255, 255, .6);--text-disabled: rgba(255, 255, 255, .3);--success-color: #00ff00;--warning-color: #ffaa00;--error-color: #ff0055;--info-color: #00aaff;--shadow-sm: 0 0 10px rgba(0, 255, 255, .1);--shadow-md: 0 0 20px rgba(0, 255, 255, .2);--shadow-lg: 0 0 30px rgba(0, 255, 255, .3);--body-bg: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #0a0e27 100%);--card-bg: rgba(10, 14, 39, .9)}:root[data-theme=dark]{--primary-color: #667eea;--primary-dark: #5568d3;--primary-light: #7c8ef0;--bg-primary: #1a1a1a;--bg-secondary: #2a2a2a;--bg-tertiary: #3a3a3a;--bg-hover: #404040;--border-color: #404040;--border-light: #333333;--border-dark: #555555;--text-primary: #ffffff;--text-secondary: #cccccc;--text-muted: #999999;--text-disabled: #666666;--success-color: #52c41a;--warning-color: #faad14;--error-color: #ff4d4f;--info-color: #1890ff;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5);--body-bg: #1a1a1a;--card-bg: #2a2a2a}:root[data-theme=tech]{--glow-color: rgba(0, 255, 255, .5);--glow-sm: 0 0 5px var(--glow-color);--glow-md: 0 0 10px var(--glow-color);--glow-lg: 0 0 20px var(--glow-color)}:root[data-theme=tech] ::-webkit-scrollbar-thumb{background:rgba(0,255,255,.3);box-shadow:0 0 5px rgba(0,255,255,.5)}:root[data-theme=tech] ::-webkit-scrollbar-thumb:hover{background:rgba(0,255,255,.5);box-shadow:0 0 10px rgba(0,255,255,.8)}:root[data-theme=tech] ::selection{background:rgba(0,255,255,.3);color:#fff}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--body-bg);color:var(--text-primary);transition:background .3s ease,color .3s ease}#root{min-height:100vh}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-dark)}::selection{background:var(--primary-color);color:var(--bg-primary)}