@charset "UTF-8";
/* Versão Mobile First */

* {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1em;
  margin: 0px;
  padding: 0px;
box-sizing: border-box;
}

 html {
   height: 100vh;
}

body {
  background: black url(../imagens/back-phone.jpg) no-repeat; 
  background-size: cover;
background-position: center center;
}

main {
  background-color: rgba(255, 255, 255, 0.747);
  width: 80vw;
margin: auto;
margin-top: 20px;
border-radius: 10px;
padding: 10px;
}

h1 {
  text-align: center;
  color:#fff;
  font-size: 2em;
  text-shadow: 2px 2px 2px rgba(0, 0, 0, 0.493); 
} 


img {
  display: block;
  margin: auto;
}


img#phone {  display: block;}
img#tablet {  display: none;}
img#print {  display: none;}
img#pc {  display: none;}
img#tv {  display: none;}