be\n  // disabled if the fieldset is disabled. Due to implementation difficulty, we\n  // don't honor that edge case; we style them as disabled anyway.\n  &:disabled,\n  &[readonly] {\n    background-color: $input-disabled-bg;\n    // iOS fix for unreadable disabled content; see https://github.com/twbs/bootstrap/issues/11655.\n    opacity: 1;\n  }\n}\n\nselect.form-control {\n  &:focus::-ms-value {\n    // Suppress the nested default white text on blue background highlight given to\n    // the selected...