Basic CSS principles

CSS or Cascading Style Sheets is a language used to describe how HTML elements should be displayed on a web page. For instance, CSS is often used to define common styling elements for a page or set of pages such as the font, background color, font size, link colors, and many other things related to the visual design of a web page:

<style>
       html, body { height: 100%; width: 100%; margin: 0; padding: 0; } 
       #map{ 
         padding:0;
         border:solid 2px #94C7BA;
         margin:5px;
       }
       #header {
         border: solid 2px #94C7BA;
         padding-top:5px;
         padding-left:10px;
         background-color:white; 
         color:#594735; 
         font-size:14pt;
         text-align:left; font-weight:bold;
         height:35px;
         margin:5px;
         overflow:hidden;
       }
       .roundedCorners{
         -webkit-border-radius: 4px;
         -moz-border-radius: 4px;
         border-radius: 4px;
       }
       .shadow{

         -webkit-box-shadow: 0px 4px 8px #adadad;
         -moz-box-shadow: 0px 4px 8px #adadad;
         -o-box-shadow: 0px 4px 8px #adadad;      box-shadow: 0px 4px 8px #adadad;
       }
</style>