Update styles.css

 styles.css | 1 +
 1 file changed, 1 insertion(+)

diff --git a/styles.css b/styles.css
index 4aa7df4..c199016 100644
--- a/styles.css
+++ b/styles.css
@@ -1,5 +1,6 @@
 box {
  color: red;
+ display: block;
  margin: auto;
  border: 2px black;
 }