style: fix button end quiz solo

src/components/quiz/modalButton/modalButton.css

 .modal-button-left {
     width: 100%;
-    height: 80px;
+    height: 80%;
     border-radius: 12px;
     border: solid 5px #508bff;
     background-color: white;
@@ -25,11 +25,12 @@
     color: #508bff;
     font-size: 3vmin;
     text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
+    margin: 0;
 }
 
 .modal-button-right {
     width: 100%;
-    height: 80px;
+    height: 80%;
     border-radius: 12px;
     background-color: #2b73fd;
     font-weight: bold;
@@ -54,4 +55,5 @@
 .modal-button-right-text {
     font-size: 3vmin;
     text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
+    margin: 0;
 }