.body {
  max-width: 800px;  
  font-family: "Arial";  
  font-size: 14px;
  background: #ffffff;
  display: block;
  margin-top: 40px;
  margin-left: auto;
  margin-right: auto;    
}

h1 {
  font-size: 18px;
  font-weight: bold;
  margin-bottom: -10px;
  text-align: center;    
}

h3 {
  font-size: 20px;
  font-weight: bold;
  margin-top: -2.5px;
  margin-bottom: -5px;
  text-align: center;
}

.logo {
  background-image: url("images/logo.png");
  background-size: 210px;
  background-position: center top;
  background-repeat: no-repeat;   
  width: 100%;
  height: 220px;
  margin: 0;     
}


.wifi {
  width: 150px;
  display: block;
  margin-top: 40px;
  margin-left: auto;
  margin-right: auto;
}

.text {
  width: 310px;
  margin-top: 15px;
  margin-left: auto;
  margin-right: auto;
  padding: 10px;  
  border: #ff0000 solid 2px;
}

@media (min-width: 600px) {
    .logo {
      background-position: left top;
      background-size: 110px;
      width: 100%;
      height: 110px;
      margin: 15px;
    }

    .wifi {
      width: 200px;
    }
    
    h1 {
      font-size: 24px;    
    }
}