<style>

body {

display: -webkit-box;

display: -webkit-flex;

display: -ms-flexbox;

display: flex;

-webkit-flex-wrap: wrap;

-ms-flex-wrap: wrap;

flex-wrap: wrap;

-webkit-justify-content: space-around;

-ms-flex-pack: distribute;

justify-content: space-around;

-webkit-box-align: center;

-webkit-align-items: center;

-ms-flex-align: center;

align-items: center;

-webkit-align-content: center;

-ms-flex-line-pack: center;

align-content: center;

</style>

tudo que vir aqui vai ficar no Meio pod ser botao script div etc