Hi Timmmy,
Suggest to use custom CSS in the future as Bootstrap is becoming Bloatstrap, I made the hard decision to switch as it eventually pulls back my website with a loading speed of 3+s, in most cases the max. attention span of a typical visitor.
Meanwhile, you can link the styling to an external CSS, this way your iOS device viewers do not need to wait for the content to be downloaded. iOS is kinda stubborn on loading inline CSS with Safari.
Cheers!