:root{--primary-white:#fff;--primary-gray:#f8fafc;--secondary-gray:#f1f5f9;--accent-blue:#3b82f6;--accent-indigo:#6366f1;--accent-green:#10b981;--accent-orange:#f59e0b;--accent-red:#ef4444;--text-primary:#1e293b;--text-secondary:#475569;--text-muted:#64748b;--text-light:#94a3b8;--border-light:#e2e8f0;--border-medium:#cbd5e1;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a;--shadow-xl:0 20px 25px -5px #0000001a;--gradient-primary:linear-gradient(135deg,#667eea 0%,#764ba2 100%);--gradient-subtle:linear-gradient(135deg,#f8fafc 0%,#fff 100%)}*{box-sizing:border-box}body{background:var(--primary-gray);color:var(--text-primary);margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.5;overflow-x:hidden}.app-container{background:var(--primary-gray);min-height:100vh;display:flex;overflow-x:hidden}.sidebar{background:var(--primary-white);color:var(--text-primary);z-index:1000;box-shadow:var(--shadow-lg);border-right:1px solid var(--border-light);width:280px;height:100vh;padding:0;transition:all .3s;position:fixed;top:0;left:0}.sidebar.collapsed{width:80px}.sidebar-header{border-bottom:1px solid var(--border-light);background:var(--gradient-subtle);padding:24px 24px 32px}.sidebar-logo{align-items:center;gap:12px;margin-bottom:8px;display:flex}.sidebar-logo h1{color:var(--text-primary);letter-spacing:-.025em;margin:0;font-size:24px;font-weight:700}.sidebar-logo .logo-icon{color:var(--accent-blue);font-size:28px}.sidebar-subtitle{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin:0;font-size:13px;font-weight:500}.sidebar-nav{padding:24px 0}.nav-item{color:var(--text-secondary);text-align:left;cursor:pointer;background:0 0;border:none;border-radius:0;align-items:center;gap:16px;width:100%;margin:0;padding:16px 24px;font-size:15px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{background:var(--secondary-gray);color:var(--text-primary)}.nav-item.active{background:var(--accent-blue);color:var(--primary-white);font-weight:600}.nav-item .icon{text-align:center;width:24px;font-size:20px}.sidebar-toggle{background:var(--primary-white);border:2px solid var(--border-medium);cursor:pointer;box-shadow:var(--shadow-md);z-index:1001;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:all 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var(--border-light);box-shadow:var(--shadow-sm);z-index:100;justify-content:space-between;align-items:center;padding:24px 32px;display:flex;position:sticky;top:0}.page-title{color:var(--text-primary);letter-spacing:-.025em;margin:0;font-size:28px;font-weight:700}.header-actions{align-items:center;gap:16px;display:flex}.content-area{flex:1;max-width:none;padding:32px;overflow-y:auto}.dashboard-grid{grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:32px;display:grid}@media (width<=1200px){.dashboard-grid{gap:16px}.dashboard-widget{padding:14px}.widget-value{font-size:24px}}@media (width<=900px){.dashboard-grid{gap:12px}.dashboard-widget{padding:12px}.widget-title{font-size:11px}.widget-value{font-size:20px}.widget-change{font-size:12px}}.dashboard-widget{background:var(--primary-white);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);border-radius:12px;padding:18px;transition:all .2s}.dashboard-widget:hover{box-shadow:var(--shadow-md)}.widget-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.widget-title{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin:0;font-size:13px;font-weight:600}.widget-icon{background:var(--secondary-gray);color:var(--accent-blue);border-radius:8px;padding:8px;font-size:24px}.widget-value{color:var(--text-primary);letter-spacing:-.025em;margin:4px 0 2px;font-size:28px;font-weight:700}.widget-change{align-items:center;gap:4px;font-size:14px;font-weight:500;display:flex}.widget-change.positive{color:var(--accent-green)}.widget-change.negative{color:var(--accent-red)}.widget-change.neutral{color:var(--text-muted)}.data-table-container{background:var(--primary-white);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);border-radius:12px;overflow:hidden}.table-header{border-bottom:1px solid var(--border-light);background:var(--gradient-subtle);padding:24px 32px 20px}.table-title{color:var(--text-primary);margin:0 0 4px;font-size:20px;font-weight:700}.table-subtitle{color:var(--text-muted);margin:0;font-size:14px}.table-controls{border-bottom:1px solid var(--border-light);background:var(--primary-white);justify-content:space-between;align-items:center;gap:20px;padding:20px 32px;display:flex}.search-container{flex:1;max-width:400px;position:relative}.search-input{background:var(--secondary-gray);border:1px solid var(--border-medium);color:var(--text-primary);border-radius:8px;width:100%;padding:12px 16px 12px 40px;font-size:14px;font-weight:400;transition:all .2s}.search-input:focus{border-color:var(--accent-blue);background:var(--primary-white);outline:none;box-shadow:0 0 0 3px #3b82f61a}.search-input::placeholder{color:var(--text-light)}.search-icon{color:var(--text-light);font-size:16px;position:absolute;top:50%;left:12px;transform:translateY(-50%)}.filter-group{gap:8px;display:flex}.filter-btn{border:1px solid var(--border-medium);background:var(--primary-white);color:var(--text-secondary);cursor:pointer;border-radius:6px;padding:8px 16px;font-size:14px;font-weight:500;transition:all .2s}.filter-btn:hover{background:var(--secondary-gray);border-color:var(--accent-blue);color:var(--text-primary)}.filter-btn.active{background:var(--accent-blue);border-color:var(--accent-blue);color:var(--primary-white)}.data-table{border-collapse:collapse;width:100%}.data-table th{background:var(--secondary-gray);color:var(--text-secondary);text-align:left;text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--border-light);padding:16px 24px;font-size:13px;font-weight:600}.data-table td{border-bottom:1px solid var(--border-light);color:var(--text-primary);padding:16px 24px;font-weight:400}.data-table tr:hover{background:var(--secondary-gray)}.data-table tr:last-child 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.2s;display:inline-flex}.btn-primary{background:var(--accent-blue);color:var(--primary-white);box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--accent-indigo);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--primary-white);color:var(--text-secondary);border:1px solid var(--border-medium)}.btn-secondary:hover{background:var(--secondary-gray);border-color:var(--accent-blue);color:var(--text-primary)}.btn-sm{padding:8px 16px;font-size:13px}.quick-stats{background:var(--primary-white);border:1px solid var(--border-light);box-shadow:var(--shadow-sm);border-radius:12px;margin-bottom:32px;padding:24px 32px}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;display:grid}.stat-item{text-align:center}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px;font-size:13px;font-weight:600}.stat-value{color:var(--text-primary);letter-spacing:-.025em;font-size:28px;font-weight:700}.stat-value.profit{color:var(--accent-green)}.empty-state{text-align:center;background:var(--primary-white);border:1px solid var(--border-light);border-radius:12px;margin:32px 0;padding:64px 32px}.empty-icon{opacity:.6;color:var(--text-light);margin-bottom:24px;font-size:64px}.empty-title{color:var(--text-primary);margin-bottom:12px;font-size:20px;font-weight:700}.empty-subtitle{color:var(--text-muted);max-width:400px;margin-bottom:32px;margin-left:auto;margin-right:auto;line-height:1.6}@media (width<=1200px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}}@media (width<=1024px){.top-header{padding:16px 24px}.page-title{font-size:24px}.content-area{padding:24px}.dashboard-grid{grid-template-columns:repeat(2,1fr);gap:16px}.dashboard-widget{padding:16px}.widget-title{font-size:12px}.widget-value{font-size:24px}}@media (width<=768px){.sidebar{z-index:1000;transform:translate(-100%)}.sidebar.collapsed{transform:translate(-100%)}.main-content,.main-content.sidebar-collapsed{left:0;right:0}.sidebar-toggle{display:none}.top-header{padding:12px 16px}.page-title{font-size:20px}.header-actions{gap:8px}.header-actions .btn{padding:8px 12px;font-size:12px}.content-area{padding:16px}.dashboard-grid{grid-template-columns:1fr;gap:12px}.dashboard-widget{padding:16px}.widget-title{font-size:11px}.widget-value{font-size:22px}.widget-change{font-size:12px}.stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}.quick-stats{margin-bottom:20px;padding:16px 20px}.table-header{padding:16px 20px}.table-title{font-size:18px}.table-controls{flex-direction:column;align-items:stretch;gap:12px;padding:16px 20px}.search-container{max-width:none}.search-input{padding:10px 12px 10px 36px;font-size:16px}.filter-group{grid-template-columns:repeat(2,1fr);gap:8px;display:grid}.filter-btn{padding:10px 12px;font-size:13px}.data-table{white-space:nowrap;font-size:12px;display:block;overflow-x:auto}.data-table th,.data-table td{min-width:100px;padding:10px 8px}.sneaker-name{font-size:13px}.sneaker-details{font-size:11px}.empty-state{margin:20px 0;padding:40px 20px}.empty-icon{font-size:48px}.empty-title{font-size:18px}}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text-primary);font-size:14px;font-weight:600}.form-input{border:1px solid var(--border-medium);background:var(--primary-white);color:var(--text-primary);border-radius:8px;padding:12px 16px;font-size:14px;transition:all .2s}.form-input:focus{border-color:var(--accent-blue);outline:none;box-shadow:0 0 0 3px #3b82f61a}.form-input-error{border-color:var(--accent-red)}.form-input-error:focus{border-color:var(--accent-red);box-shadow:0 0 0 3px #ef44441a}.form-error{color:var(--accent-red);font-size:12px;font-weight:500}textarea.form-input{resize:vertical;min-height:80px}select.form-input{cursor:pointer}@media (width<=768px){.form-input{padding:14px 16px;font-size:16px}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--secondary-gray)}::-webkit-scrollbar-thumb{background:var(--border-medium);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-blue)}