a:link,
a:visited {
    background-color: #2ea44f;
    border-radius: 5px;
    color: #fff;
    display: block;
    margin: 2px auto;
    padding: 1px;
    text-align: center;
    text-decoration: none;
    width: 280px;
}
a:hover,
a:active {
    background-color: #165c26;
    border-radius: 5px;
    color: #fff;
    margin: 2px auto;
    padding: 1px;
    text-decoration: none;
    width: 280px;
}
img{
  display: block;
  margin: 2px auto;
}

.box{
  display: inline-block;
  margin: 5px;
}
.container{
  margin: 0 auto;
  max-width: 1100px;
  text-align: center;
}
@media only screen and (max-width: 400px) {
    .container{
      width: 100%;
    }
}