Gravity Forms select styling issue

hi there,
i’ve had to specify a pixel width for the date of birth drop-down’s:

#top #input_10_3_1, #top #input_10_3_2, #top #input_10_3_3 {min-width:100px;}

they were set to:

#top .gform_wrapper input, #top .gform_wrapper select {margin-bottom: 0;min-width: auto;}

which causes them to collapse like so: https://share.cleanshot.com/lVTjRXMC

this seems to be something to do with enfold as the above is set in the gravity-mod.css file which sits in /wp-content/enfold/config-gravityforms

is this a known issue? can you help?