diff --git a/css/stereo.css b/css/stereo.css
index 4d21569..959dcd1 100644
--- a/css/stereo.css
+++ b/css/stereo.css
@@ -99,10 +99,11 @@ tr.matrix td:not(.mino) {
 .minoes-table .mino {
     background: radial-gradient(circle at -150% -200%, #fffb 0%, var(--background-color) 100%);
     overflow: visible;
+    border-radius: 1px;
 }
 
 .mino::before,
-.mino + *::before,
+.mino + ::before,
 .mino::after {
     content: '';
     position: absolute;
@@ -111,6 +112,7 @@ tr.matrix td:not(.mino) {
     left: 0;
     width: inherit;
     height: inherit;
+    border-radius: 1px;
 }
 
 .mino::before {