.diagonal-corner-container{clip-path:polygon(2.5rem 0,100% 0,100% calc(100% - 2.5rem),calc(100% - 2.5rem) 100%,0 100%,0 2.5rem)}.diagonal-corner-button{clip-path:polygon(.4375rem 0,100% 0,100% calc(100% - .4375rem),calc(100% - .4375rem) 100%,0 100%,0 .4375rem)}