@media only screen and (max-width: 600px) {}

@media only screen and (min-width: 601px) and (max-width: 1024px) {}

@media only screen and (min-width: 1025px) {}

body, html 
{
  height: 100%;
  width: auto;
}

.bg {
background-image: url("pc001.jpg");
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}

header{
    
    background-image: url("untitled.png"); 
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;    
    box-shadow: 0px 5px 13px 2px #7c7c7c;
    height:100px;
    display:flex;
    justify-content:flex-end;
    align-items:flex-start;
  }

  body {
    background-color: black;
    }
header a {
  
  color: white;  
  margin-right: 20px;
  text-decoration: none;
} 
 
header a:hover {
  color: rgb(134, 132, 128);
}
div a {
  background-color: blue;
  color: rgb(255, 255, 255);
  margin-right: 10px;
  text-decoration: none;
  padding: 5px;
  border: 2px solid rgb(253, 253, 253);
}
div a:hover {
  color: gray;
  background-color: rgb(61, 61, 221);
}
.container {
  display:flex;
  justify-content:center;
  
}
.conti {
  margin-top: 20px;
  display:flex;
  justify-content:center;
 
}