Update docs.html

docs.html

@@ -662,11 +662,11 @@
 
     /* NFT Styles */
     .nfts-section {
-  background: var(--theme-nft-bg-image, none), /* optional image */
+  background: var(--theme-nft-bg-image, none),
               linear-gradient(135deg, var(--theme-bg-secondary) 0%, var(--theme-bg-tertiary) 100%);
-  background-size: cover;
-  background-position: center;
-  background-repeat: no-repeat;
+  background-size: contain;      /* entire image fits inside the section */
+  background-position: center;   /* center the image */
+  background-repeat: no-repeat;  /* no tiling */
   border: 1px solid var(--theme-primary);
   border-radius: 10px;
   padding: 15px;