app/assets/stylesheets/swal2_custom.sass
.swal2-html-container
text-align: left !important
.ss-content
z-index: 10100 !important
.swal2-close
background-color: $red !important
border-top-left-radius: 0px !important
border-bottom-right-radius: 0px !important
border-top-right-radius: 0px !important