How do I set the background color of a cell based on the values in a range of cells?

How do I set the background color of a cell based on the values in a range of cells?  I have a spreadsheet with columns that have static data and a range of columns that has dynamic data.  I want the rows of static data to be highlighted if the data in that range is equal to a specific value.

For example, if the data in range D3:O3 all equal "OFFLINE", then I want row A3:C3 to be highlighted in red.
Sample.xlsx
zepoldAsked:
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Phillip BurtonConnect With a Mentor Director, Practice Manager and Computing ConsultantCommented:
Highlight cells A3:C3.

Go through the procedure outlined in https://www.ablebits.com/office-addins-blog/2014/06/10/excel-conditional-formatting-formulas/

The formula you want in step 5 is

=$d3&$e3&$f3&$g3&$H3&$i3&$j3&$k3&$l3&$m3&$n3&$o3="OFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINEOFFLINE"
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zepoldAuthor Commented:
I also managed to put this formula together, this afternoon:

=(COUNTIF($D3:$O3,"=OFFLINE")=12)

Seems to work, as well, but I haven't tested it fully.  Literally, just came up with it when I got your email.
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