*,
*:before,
*:after {
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

body {
  margin: 20px;

}

.app {
  display: flex;
  margin-left: 0 auto;
  margin-right: 0 auto;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  align-self: center;

}