body {margin:0;}
a
{
margin:0;
padding:0;
}

#as
{
  background-color: #94b0ca;
}


.topnav {
  overflow: hidden;
  background-color: #94b0ca;
 
}
@media screen and (min-width: 630px) {
  .topnav {

  width: 350px ; /* 630  */
  margin-left: auto ;
  margin-right: auto ;
}}

.topnav a {
  float: left;
  display: block;
  color: black;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
  
}


.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 630px) {
  .topnav {
  overflow: hidden;
  background-color: #94b0ca;
  }
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 630px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: middle;
  }

}