*{margin:0;padding:0}.appContainer{display:flex;flex-direction:column;align-items:center;height:auto;width:auto}body{background-color:#2c3e50}.btn{width:125px;align-self:center;padding:12px;transition:all .3s;border:2px solid rgba(0,0,0,.6);background-color:#ecf0f1;text-align:center;cursor:pointer;font-size:1rem}.btn:hover{background-color:#2c3e50;color:#fff}.border{border:1px solid red}