a {
    -webkit-transition: 1s;
    -moz-transition: 1s;
    transition: 1s
}

a {
    -moz-transition: 1s;
      -o-transition: 1s;
         transition: 1s
}

a {
    -webkit-border-radius: 4px;
       -moz-border-radius: 4px;
            border-radius: 4px
}