MDB is styling using input[type=text] rule, this is however prone to many problems. This particular attribute type="text" on input tag is redundant as per W3C specification, it's implicit. It means that most code refactoring tools will simply strip it down to reduce html size. It happened to me with HTML minifiers and now with simple ASP.NET. So even if my cshtml view has <input type="text" id="form2" class="form-control"> output is automatically simplified to <input id="form2" class="form-control"> making the input box unstyled ... If simple input rule is a problem, I'd like to suggest adding input that has no type attribute to be treated the same as one with type=text ... input:not([type]), input[type='text']

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