Congrazie freelancer romania

I need some changes to a given wordpress theme, used at : http://www.pensionkrone.de/ 1. Make Theme Responsive - 3 Layouts (default, tablet, mobile phone) 2. User HTML 5 and CSS3 instead of the current HTML and CSS coding 3... (Budget: $30-$100 USD, Jobs: CSS, HTML5, PHP, Wordpress)