feat: edited a bit the css

replaced width with max-width in #avatar and added border-radius to the
portfolio images

styles.css

@@ -54,7 +54,7 @@ body {
 }
 
 #avatar {
-    width: 256px;
+    max-width: 256px;
     float: right;
     border-radius: 8px;
 }
@@ -63,10 +63,15 @@ body {
     justify-items: center;
     gap: 4px;
 }
+
 #gallery {
     display: grid;
     grid-template-columns: repeat(3, 1fr);
 }
+#gallery img {
+    border-radius: 8px;
+}
+
 @media screen and (max-width: 900px) {
     #buttons {
         display: grid;