frontend: add some styling

frontend/src/App.css

@@ -1,15 +1,9 @@
 #root {
   width: 100%;
   max-width: 1280px;
-  min-width: 375px;
-  margin: 0 auto;
   text-align: center;
 }
 
-.mainText {
-  color: #5f5e5e;
-}
-
 /* General table styles */
 table {
     width: 100%;
@@ -23,13 +17,11 @@ table {
 th {
     background-color: #4CAF50; /* Green */
     color: white;
-    padding: 10px;
     text-align: left;
 }
 
 /* Table cell styles */
 td {
-    padding: 10px;
     border: 1px solid #ddd;
 }
 
@@ -38,25 +30,6 @@ tr:nth-child(even) {
     background-color: #f2f2f2;
 }
 
-/* Responsive table styles */
-@media (max-width: 600px) {
-    table {
-        display: block;
-        overflow-x: auto;
-        white-space: nowrap;
-    }
-    
-    th, td {
-        padding: 8px;
-        font-size: 0.9em;
-    }
-    
-    th {
-        font-weight: bold;
-        background-color: #3C8A3C;
-    }
-}
-
 /* Hover effect for rows */
 tr:hover {
     background-color: #f1f1f1;