1.shadow-md {
2    box-shadow: 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
3}
4
5[class*='shadow'] {
6    transition: .2s;
7    transition-property: color, box-shadow;
8}
9