minor fix on btn

Author: kerbethecoder

global.css

@@ -52,6 +52,7 @@ body {
   cursor: pointer;
   outline: none;
   transition: all 300ms cubic-bezier(0.23, 1, 0.32, 1);
+  color: var(--black);
 
   margin: 10px 5px;
   width: 80px;
@@ -67,5 +68,6 @@ body {
 
 .btn:active {
   box-shadow: none;
+  color: var(--black);
   transform: translateY(0);
 }