🐛 Setup page transitions

Bugged for some reason, the old page stays before the new page loading at the end

src/style/_base.scss

@@ -86,4 +86,26 @@ button {
         display: inline-block;
         transition: opacity 0.7s var(--ease-quart), transform 0.7s var(--ease-quart);
     }
+}
+
+// Mask for animations
+.mask {
+    display: block;
+    overflow: hidden;
+    white-space: nowrap;
+
+    span {
+        display: inline-block;
+    }
+}
+
+// Page loading overlay
+.page-loading {
+    position: fixed;
+    z-index: 2000;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    cursor: wait;
 }