.frm{top:-.2em;right:-.2em;bottom:-.2em;left:-.2em;color:red;filter:hue-rotate(200deg)}
.frm:after{border:solid 2px;background:url(../mask/corner11a.svg)0 0/.88em,url(../mask/corner11b.svg)100% 0/.88em,url(../mask/corner11c.svg)100% 100%/.88em,url(../mask/corner11d.svg)0 100%/.88em;background-repeat:no-repeat;filter:brightness(.7)url(#lightA2)}