body { font-family: 'Inter', sans-serif; background-color: #f8fafc; }
    .tab-content { display: none; }
    .tab-content.active { display: block; }
    .custom-scrollbar::-webkit-scrollbar { width: 6px; height: 6px; }
    .custom-scrollbar::-webkit-scrollbar-track { background: #f1f1f1; border-radius: 4px; }
    .custom-scrollbar::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
    #loading-overlay { backdrop-filter: blur(4px); }
    input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
    body:not(.is-admin) .admin-col { display: none !important; }
    body:not(.is-admin) .nav-admin { display: none !important; }
    body:not(.is-auth) .nav-auth { display: none !important; }
    input[type=range] { -webkit-appearance: none; }
    input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; height: 16px; width: 16px; border-radius: 50%; background: #2563eb; cursor: pointer; box-shadow: 0 0 2px rgba(0,0,0,0.5); }