Sposób na border collapse bez tabeli

box-shadow: 
1px 0 0 0 $cGray, 
0 1px 0 0 $cGray, 
1px 1px 0 0 $cGray,   /* Just to fix the corner */
1px 0 0 0 $cGray inset, 
0 1px 0 0 $cGray inset;