:root {
    --fi-font-size-base: 14px; /* default = 16px */
}

/* Remove borders only from nested repeater items */
.merchant-resource-form .fi-fo-repeater-item  {
   border: none !important; border-width: 0 !important; box-shadow: none !important; background-color: transparent !important; padding: 0 !important; 
}