html {
  font-family: arial, sans-serif;
  -webkit-text-size-adjust: 100%;
      -ms-text-size-adjust: 100%;
      height:100%;
}
body {
  margin: 0;
   background: #ffffff ;
   height:100%;
  
}



.header {
    
    background-color:#ffffff;
    height:10%;
    left:0;
    right:0;   
   
    
}