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a {  /* transition */  -webkit-transition: all 1s;  -o-transition: all 1s;  transition: all 1s;  height: -webkit-calc(/* comment before */100% - /* comment inside */ 10px/* comment after */);  height: calc(/* comment before */100% - /* comment inside */ 10px/* comment after */);}
/* placeholder */::-webkit-input-placeholder { }::placeholder { }