html, body {
  font: 100% Helvetica, sans-serif;
 
  padding: 0;
  margin: 0 auto; 

    background: #305166;

}

.container {
  width: 100%;
  height: auto; 
}

h1{
    color: aliceblue;
    padding: .5em;
}

img{
    width:300px;
    height: auto;
   display: block;
    margin-left: auto;
    margin-right: auto;
}