.opacity-0   { opacity: 0; }
.opacity-10  { opacity: 0.1; }
.opacity-20  { opacity: 0.2; }
.opacity-30  { opacity: 0.3; }
.opacity-40  { opacity: 0.4; }
.opacity-50  { opacity: 0.5; }
.opacity-60  { opacity: 0.6; }
.opacity-70  { opacity: 0.7; }
.opacity-80  { opacity: 0.8; }
.opacity-90  { opacity: 0.9; }
.opacity-100 { opacity: 1; }