.arrow{position:absolute;padding:1rem;box-shadow:1px -1px 0 1px grey inset;-webkit-box-shadow:2px -2px grey inset;border:solid transparent;border-width:0 0 8rem 2rem;transition:.2s}.arrow:hover{box-shadow:2px -2px 0 2px grey inset;-webkit-box-shadow:4px -4px grey inset}.arrow-up{transform:rotate(135deg)}.arrow-right{transform:rotate(225deg)}.arrow-down{transform:rotate(-45deg)}.arrow-left{transform:rotate(45deg)}