.mask { 
-webkit-clip-path: polygon(0% 0%, 100% 0%, 100% 80%, 0% 100%);
clip-path: polygon(0% 0%, 100% 0%, 100% 80%, 0% 100%);
}
.mask2 { 
    clip-path: polygon(0% 0%, 55% 0%, 45% 100%, 0% 100%);
}

@media (max-width: 480px) {
    .mask {
       -webkit-clip-path: polygon(0% 0%, 100% 0%, 100% 80%, 0% 100%);
       clip-path: polygon(0% 0%, 100% 0%, 100% 8%, 0% 100%);
    }
}

.mucheckbox{
position:relative;
display:block;
padding-left: unset;
}