Blog post titles case problem

Hi! I recently purchased Moview theme for my film review website. I have a problem with the post title case. The current one is set to display first letter of every word as uppercase, it seems that this is Moview theme default. But I want every title to be the way I originally wrote it (sometimes in Sentence case, sometimes same as current one – depends on the movie title). I tried looking at CSS but I cannot find the right line to change and I am not really sure what to do. I also tried typography customization, changing all heading titles, but nothing came out of it. I really need to fix this.
For example, the post title is displayed as “Le Gamin Au Vélo (2011)”, but I want it displayed as “Le gamin au vélo (2011)”, the way I originally wrote it. Sometimes I write the title with the first letter of every word as uppercase – I want it to be displayed the same way I originally wrote it. Please help me about that.

Here is the link to my website.

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