fix: apply owl background image to all pages, fix duplicate image on … (#185)

* fix: apply owl background image to all pages, fix duplicate image on index.html

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Co-authored-by: DavidKRK <136035295+DavidKRK@users.noreply.github.com>

* fix: add background-color fallback to body for image load failures

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: DavidKRK

assets/css/style.css

@@ -243,6 +243,7 @@ body {
 
 /* ---------- BACKGROUND ---------- */
 body {
+  background-color: #416e73;
   background-image: url("../images/david_krk_owl.jpg");
   background-size: cover;
   background-position: left center;