.vc_tta-color-custom.vc_tta-style-classic .vc_tta-tab a {
    color: #666 !important;
    border-color: transparent !important;
}

.vc_tta-color-custom.vc_tta-style-classic .vc_tta-tab.vc_active a {
    border-color: color-mix(in srgb,var(--vc-tta-active-color,#f0f0f0),#000 5%) !important;   
    border-right-color: transparent !important;
}