Modelo básico do CSS
//external style css
<link rel="stylesheet" type="text/css" href="fileName.css"></link>
//internal style css
<style>
*{
margin:0;
padding:0;
box-sizing:border-box;
text-decoration:none;
}
</style>
//inline style css
<p style="color:blue;font-size:50px;">Hello World</p>
WinMaw