.main {
  background: #fcc;
  margin-bottom: 10px;
}
.side {
  background: #fea;
}
.main,
.side {
  padding: 2%;
  border-radius: 10px
}

/* Responsive */
@media ( min-width : 600px ){
    .flexbox {
      display: -webkit-flex;
      display: flex;
    }
  .main {
margin: 0 10px 0 0;
flex: 1 1 auto;
  }
}

.mybutton {
    width:100px;
    font-size:12px;
    font-weight:bold;
    text-decoration:none;
    display:block;
    text-align:center;
    padding:5px 0 5px;
    color:#fff;
    background-color:#49a9d4;
    border-radius:10px;
}