#panel1,#panel2,#panel3{display:none;padding:0;background:#42a5f5;color:#fff;text-align:center;}
#panel1,#panel2,#panel3 p{padding:100px 0;}
#panel-btn1,#panel-btn2,#panel-btn3{display:block;position:relative;width:150px;margin:0 auto;padding:10px 0;background:#42a5f5;color:#fff;font-weight:bold;text-align:center;text-decoration:none;}
#panel-btn1:before,#panel-btn2:before,#panel-btn3:before{content:"";position:absolute;top:50%;right:10px;width:10px;height:2px;margin-top:-2px;background:#fff;}
#panel-btn1:after,#panel-btn2:after,#panel-btn3:after{content:"";position:absolute;top:50%;right:14px;width:2px;height:10px;margin-top:-6px;background:#fff;}