CSS problem with custom HTML on homepage

[Pauling41]

Dear Magento Community,

I am having problems on my site voetbaltrips.com, when I try to insert 4 tables with CSS styling into the Content area of the homepage (the four tables directly below the slideshow). For some reason, my Magento Theme inherits the CSS properties of the custom HTML.Some fonts become bold, and other strange stuff happens... Is there something I can do to prevent this from happening?

The HTML/CSS code that I insert into the homepage can be found here: http://pastebin.com/WAiA9upz

Thanks!

[JLHC]

You may want to consider implementing separate CSS classes so it doesn't conflict with your main CSS elements.