feat(style): improve style for header and image

assets/css/_page/_single.scss

@@ -168,7 +168,7 @@
     }
 
     img {
-      max-width: 96%;
+      max-width: 100%;
       min-height: 1.2rem;
     }
 
@@ -192,11 +192,6 @@
         height: auto;
         margin: 0 auto;
         overflow: hidden;
-        transition: all 0.2s ease-in-out;
-      }
-
-      a.lightgallery:hover img {
-        transform: scale(1.02);
       }
     }
 

assets/css/_partial/_header.scss

@@ -11,7 +11,7 @@ header {
     font-weight: bold;
   }
 
-  .select-language {
+  .language-select {
     font-weight: $global-font-weight;
     border: none;
     box-shadow: none;
@@ -32,6 +32,10 @@ header {
       cursor: pointer;
     }
   }
+
+  .theme-switch i {
+    transform: rotate(225deg);
+  }
 }
 
 #header-desktop {