.book{padding:15px 0 0;margin:auto}.shelf{border-left:20px solid transparent;border-right:20px solid transparent;top:-20px;z-index:-10;margin-bottom:50px}.shelf:after{content:'';background:none;height:20px;width:calc(100% + 40px);position:absolute;top:30px;left:0;right:0;z-index:1;margin:0 -20px}