Add win overlay

web/assets/css/game.css

@@ -127,6 +127,12 @@ main {
     background-color: #DADEEF;
     position: relative;
     overflow: hidden;
+    -moz-transform: scaleX(-1);
+    -webkit-transform: scaleX(-1);
+    -o-transform: scaleX(-1);
+    transform: scaleX(-1);
+    -ms-filter: fliph; /*IE*/
+    filter: fliph; /*IE*/
 }
 
 .wall {
@@ -329,3 +335,42 @@ main {
         padding: 8px;
     }
 }
+
+.win-overlay {
+    position: absolute;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.5);
+    z-index: 1000;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    visibility: hidden;
+    gap: 20px;
+    backdrop-filter: blur(6px);
+
+}
+
+.win-overlay h1 {
+    font-size: 2rem;
+    font-weight: 700;
+    color: #fff;
+    text-align: center;
+}
+
+.win-overlay p {
+    font-size: 1.5rem;
+    font-weight: 400;
+    color: #fff;
+    text-align: center;
+}
+
+.win-overlay button {
+    font-size: 1.5rem;
+    padding: 10px 20px;
+    border-radius: 5px;
+    background-color: #fff;
+    color: #000;
+    border: none;
+    cursor: pointer;
+}