html {
   background: url(pexels-panumas-nikhomkhai-1148820.jpg) no-repeat center center fixed;
   -webkit-background-size: cover;
   -moz-background-size: cover;
   -o-background-size: cover;
   background-size: cover; 
}

p {
   size:12px;
   font-weight:bold;
}