.form-group {

    .form-control {
        @include transition(border-color .2s ease-in-out);
        @include transition(box-shadow .2s ease-in-out);
        @include transition(border-color .2s ease-in-out);
    }

    &.valid {
        .form-control {
            border-color: $green-faded;
            box-shadow: 0 0 5px $green-faded;
        }
    }

    .input-group-addon {
        background-color: $gray-background;
    }
}