merge: resolve conflicts with main (WebP + vanilla JS + a11y)

Merge pull request 'fix: JavaScript doppelte Funktionen & toter Code (#39 )' (#40 ) from feature/39-js-duplicate-functions-fix into main
Reviewed-on: #40
2026-05-19 13:28:52 +00:00 · 2026-05-19 15:13:29 +02:00 · 2026-05-19 12:41:58 +00:00 · 2026-05-15 10:45:31 +02:00 · 2026-05-15 08:43:47 +00:00 · 2026-05-15 08:40:16 +00:00
50 changed files with 315 additions and 157 deletions
--- a/bilder/Außenansicht-2-small.webp
+++ b/bilder/Außenansicht-2-small.webp
--- a/bilder/Außenansicht-2.webp
+++ b/bilder/Außenansicht-2.webp
--- a/bilder/Bad-2-small.webp
+++ b/bilder/Bad-2-small.webp
--- a/bilder/Bad-2.webp
+++ b/bilder/Bad-2.webp
--- a/bilder/Bad-3-small.webp
+++ b/bilder/Bad-3-small.webp
--- a/bilder/Bad-3.webp
+++ b/bilder/Bad-3.webp
--- a/bilder/Bad-4-small.webp
+++ b/bilder/Bad-4-small.webp
--- a/bilder/Bad-4.webp
+++ b/bilder/Bad-4.webp
--- a/bilder/Bad-small.webp
+++ b/bilder/Bad-small.webp
--- a/bilder/Bad.webp
+++ b/bilder/Bad.webp
--- a/bilder/Kinderzimmer
+++ b/bilder/Kinderzimmer
--- a/bilder/Kinderzimmer
+++ b/bilder/Kinderzimmer
--- a/bilder/Kinderzimmer
+++ b/bilder/Kinderzimmer
--- a/bilder/Kinderzimmer
+++ b/bilder/Kinderzimmer
--- a/bilder/Kinderzimmer-small.webp
+++ b/bilder/Kinderzimmer-small.webp
--- a/bilder/Kinderzimmer.webp
+++ b/bilder/Kinderzimmer.webp
--- a/bilder/Küche
+++ b/bilder/Küche
--- a/bilder/Küche
+++ b/bilder/Küche
--- a/bilder/favicon/apple-touch-icon.png
+++ b/bilder/favicon/apple-touch-icon.png
--- a/bilder/favicon/favicon-16x16.png
+++ b/bilder/favicon/favicon-16x16.png
--- a/bilder/favicon/favicon-32x32.png
+++ b/bilder/favicon/favicon-32x32.png
--- a/bilder/favicon/favicon.ico
+++ b/bilder/favicon/favicon.ico
--- a/bilder/favicon/site.webmanifest
+++ b/bilder/favicon/site.webmanifest
@@ -0,0 +1,10 @@
+{
+  "name": "Haus Schleusingen",
+  "short_name": "HS",
+  "icons": [
+    { "src": "/bilder/favicon/favicon-32x32.png", "sizes": "32x32", "type": "image/png" },
+    { "src": "/bilder/favicon/favicon-16x16.png", "sizes": "16x16", "type": "image/png" }
+  ],
+  "theme_color": "#1c1917",
+  "background_color": "#fafaf9"
+}
--- a/bilder/grundrisse/Dachboden
+++ b/bilder/grundrisse/Dachboden
--- a/bilder/grundrisse/Dachboden
+++ b/bilder/grundrisse/Dachboden
--- a/bilder/grundrisse/Dachboden
+++ b/bilder/grundrisse/Dachboden
--- a/bilder/grundrisse/Dachboden
+++ b/bilder/grundrisse/Dachboden
--- a/bilder/grundrisse/EG
+++ b/bilder/grundrisse/EG
--- a/bilder/grundrisse/EG
+++ b/bilder/grundrisse/EG
--- a/bilder/grundrisse/EG-small.webp
+++ b/bilder/grundrisse/EG-small.webp
--- a/bilder/grundrisse/EG.webp
+++ b/bilder/grundrisse/EG.webp
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/grundriss-small.webp
+++ b/grundriss-small.webp
--- a/bilder/grundrisse/OG
+++ b/bilder/grundrisse/OG
--- a/bilder/kinderzimmer
+++ b/bilder/kinderzimmer
--- a/bilder/kinderzimmer
+++ b/bilder/kinderzimmer
--- a/bilder/schlafzimmer-small.webp
+++ b/bilder/schlafzimmer-small.webp
--- a/bilder/schlafzimmer.webp
+++ b/bilder/schlafzimmer.webp
--- a/bilder/wohnzimmer2-small.webp
+++ b/bilder/wohnzimmer2-small.webp
--- a/bilder/wohnzimmer2.webp
+++ b/bilder/wohnzimmer2.webp
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -13,7 +13,6 @@ module.exports = [
      sourceType: "script",
      globals: {
        ...globals.browser,
-        ...globals.jquery,
      },
    },
    plugins: {
--- a/index.php
+++ b/index.php
@@ -126,6 +126,11 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
 <html lang="de">
  <head>
    <meta charset="UTF-8" />
+    <link rel="icon" type="image/png" sizes="32x32" href="/bilder/favicon/favicon-32x32.png">
+    <link rel="icon" type="image/png" sizes="16x16" href="/bilder/favicon/favicon-16x16.png">
+    <link rel="icon" type="image/x-icon" href="/bilder/favicon/favicon.ico">
+    <link rel="apple-touch-icon" sizes="180x180" href="/bilder/favicon/apple-touch-icon.png">
+    <link rel="manifest" href="/bilder/favicon/site.webmanifest">
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Einfamilienhaus mieten Schleusingen | 227 m², 6 Zimmer | 1.300 € Kaltmiete</title>
    <meta name="description" content="Einfamilienhaus zur Langzeitmiete in Schleusingen: 227 m² Wohnfläche, 6 Zimmer, 3 Etagen mit Dachterrasse. Kaltmiete 1.300 €. Bahnhofstraße 10, 98553 Schleusingen. Ab sofort verfügbar." />
@@ -182,7 +187,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    </script>

    <link rel="stylesheet" href="fonts/fonts.css" />
-    <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
    <link rel="stylesheet" href="css/haus-schleusingen.css" />
  </head>
  <body>
@@ -211,7 +215,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
      <div
        class="hero-bg"
        id="heroBg"
-        style="background-image: url(bilder/Außenansicht-2.png)"
+        style="background-image: url(bilder/Außenansicht-2.webp)"
      ></div>
      <div class="hero-overlay"></div>
      <div class="hero-content" id="heroContent">
@@ -285,7 +289,10 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        </div>
      </div>
      <div class="intro-img" data-animate>
-        <img src="bilder/wohnzimmer2.png" alt="Wohnzimmer" />
+        <picture>
+          <source srcset="bilder/wohnzimmer2.webp" type="image/webp">
+          <img src="bilder/wohnzimmer2.png" alt="Wohnzimmer" loading="lazy" />
+        </picture>
        <div class="intro-img-badge">Wohnzimmer · 42,6 m²</div>
      </div>
    </section>
@@ -300,55 +307,88 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
      <div class="masonry-grid">
        <div class="grid-sizer"></div>

-        <div class="grid-item" data-img="bilder/Außenansicht-2.png" role="button" tabindex="0" aria-label="Außenansicht – Großansicht öffnen">
-          <img src="bilder/Außenansicht-2-small.png" alt="Außenansicht des Einfamilienhauses" />
+        <div class="grid-item" data-img="bilder/Außenansicht-2.webp" role="button" tabindex="0" aria-label="Außenansicht – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Außenansicht-2-small.webp" type="image/webp">
+            <img src="bilder/Außenansicht-2-small.png" alt="Außenansicht des Einfamilienhauses" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Außenansicht</span>
        </div>
-        <div class="grid-item" data-img="bilder/wohnzimmer2.png" role="button" tabindex="0" aria-label="Wohnzimmer – Großansicht öffnen">
-          <img src="bilder/wohnzimmer2-small.png" alt="Wohnzimmer mit 42,6 m² Wohnfläche" />
+        <div class="grid-item" data-img="bilder/wohnzimmer2.webp" role="button" tabindex="0" aria-label="Wohnzimmer – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/wohnzimmer2-small.webp" type="image/webp">
+            <img src="bilder/wohnzimmer2-small.png" alt="Wohnzimmer mit 42,6 m² Wohnfläche" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Wohnzimmer · 42,6 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/Küche 1.jpg" role="button" tabindex="0" aria-label="Küche – Großansicht öffnen">
-          <img src="bilder/Küche 1.jpg" alt="Küche mit 18,4 m²" />
+        <div class="grid-item" data-img="bilder/Küche 1.webp" role="button" tabindex="0" aria-label="Küche – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Küche 1-small.webp" type="image/webp">
+            <img src="bilder/Küche 1.jpg" alt="Küche mit 18,4 m²" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Küche · 18,4 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/schlafzimmer.png" role="button" tabindex="0" aria-label="Schlafzimmer – Großansicht öffnen">
-          <img src="bilder/schlafzimmer-small.png" alt="Schlafzimmer mit 18 m²" />
+        <div class="grid-item" data-img="bilder/schlafzimmer.webp" role="button" tabindex="0" aria-label="Schlafzimmer – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/schlafzimmer-small.webp" type="image/webp">
+            <img src="bilder/schlafzimmer-small.png" alt="Schlafzimmer mit 18 m²" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Schlafzimmer · 18 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/Bad.jpg" role="button" tabindex="0" aria-label="Badezimmer – Großansicht öffnen">
-          <img src="bilder/Bad.jpg" alt="Badezimmer mit 9,8 m²" />
+        <div class="grid-item" data-img="bilder/Bad.webp" role="button" tabindex="0" aria-label="Badezimmer – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Bad-small.webp" type="image/webp">
+            <img src="bilder/Bad.jpg" alt="Badezimmer mit 9,8 m²" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Badezimmer · 9,8 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/Kinderzimmer.png" role="button" tabindex="0" aria-label="Kinderzimmer 1 – Großansicht öffnen">
-          <img src="bilder/Kinderzimmer-small.png" alt="Kinderzimmer 1 mit 21,7 m²" />
+        <div class="grid-item" data-img="bilder/Kinderzimmer.webp" role="button" tabindex="0" aria-label="Kinderzimmer 1 – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Kinderzimmer-small.webp" type="image/webp">
+            <img src="bilder/Kinderzimmer-small.png" alt="Kinderzimmer 1 mit 21,7 m²" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Kinderzimmer 1 · 21,7 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/Kinderzimmer 2.jpg" role="button" tabindex="0" aria-label="Kinderzimmer 2 – Großansicht öffnen">
-          <img src="bilder/Kinderzimmer 2-small.png" alt="Kinderzimmer 2 mit 15,7 m²" />
+        <div class="grid-item" data-img="bilder/Kinderzimmer 2.webp" role="button" tabindex="0" aria-label="Kinderzimmer 2 – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Kinderzimmer 2-small.webp" type="image/webp">
+            <img src="bilder/Kinderzimmer 2-small.png" alt="Kinderzimmer 2 mit 15,7 m²" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Kinderzimmer 2 · 15,7 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/kinderzimmer 2 2.jpeg" role="button" tabindex="0" aria-label="Kinderzimmer Detail – Großansicht öffnen">
-          <img src="bilder/kinderzimmer 2 2-small.png" alt="Detailansicht Kinderzimmer" />
+        <div class="grid-item" data-img="bilder/kinderzimmer 2 2.webp" role="button" tabindex="0" aria-label="Kinderzimmer Detail – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/kinderzimmer 2 2-small.webp" type="image/webp">
+            <img src="bilder/kinderzimmer 2 2-small.png" alt="Detailansicht Kinderzimmer" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Kinderzimmer Detail</span>
        </div>
-        <div class="grid-item" data-img="bilder/Kinderzimmer 3.jpg" role="button" tabindex="0" aria-label="Gästezimmer – Großansicht öffnen">
-          <img src="bilder/Kinderzimmer 3-small.png" alt="Gästezimmer mit 11,5 m²" />
+        <div class="grid-item" data-img="bilder/Kinderzimmer 3.webp" role="button" tabindex="0" aria-label="Gästezimmer – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Kinderzimmer 3-small.webp" type="image/webp">
+            <img src="bilder/Kinderzimmer 3-small.png" alt="Gästezimmer mit 11,5 m²" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Gästezimmer · 11,5 m²</span>
        </div>
-        <div class="grid-item" data-img="bilder/Bad-2.jpg" role="button" tabindex="0" aria-label="Zweites Bad – Großansicht öffnen">
-          <img src="bilder/Bad-2-small.jpg" alt="Zweites Badezimmer im Haus" />
+        <div class="grid-item" data-img="bilder/Bad-2.webp" role="button" tabindex="0" aria-label="Zweites Bad – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Bad-2-small.webp" type="image/webp">
+            <img src="bilder/Bad-2-small.jpg" alt="Zweites Badezimmer im Haus" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Wohnbereich</span>
        </div>
-        <div class="grid-item" data-img="bilder/bad3.jpg" role="button" tabindex="0" aria-label="Drittes Bad – Großansicht öffnen">
-          <img src="bilder/Bad-3-small.jpg" alt="Drittes Badezimmer im Haus" />
+        <div class="grid-item" data-img="bilder/Bad-3.webp" role="button" tabindex="0" aria-label="Drittes Bad – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Bad-3-small.webp" type="image/webp">
+            <img src="bilder/Bad-3-small.jpg" alt="Drittes Badezimmer im Haus" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Wohnbereich Detail</span>
        </div>
-        <div class="grid-item" data-img="bilder/WhatsApp Image 2026-03-30 at 07.50.42 (2).jpeg" role="button" tabindex="0" aria-label="Hausansicht – Großansicht öffnen">
-          <img
-            src="bilder/WhatsApp Image 2026-03-30 at 07.50.42 (2).jpeg"
-            alt="Weitere Außenansicht des Einfamilienhauses"
-          />
+        <div class="grid-item" data-img="bilder/Bad-4.webp" role="button" tabindex="0" aria-label="Wohnbereich Detail – Großansicht öffnen">
+          <picture>
+            <source srcset="bilder/Bad-4-small.webp" type="image/webp">
+            <img src="bilder/Bad-4-small.jpg" alt="Wohnbereich Detail 3" loading="lazy" />
+          </picture>
          <span class="grid-item-label">Hausansicht</span>
        </div>
      </div>
@@ -394,16 +434,24 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
              </div>
            </div>
            <div class="floor-plan floor-plan-multi">
-              <img
-                src="bilder/grundrisse/EG-small.jpg"
-                alt="Grundriss Erdgeschoss"
-                data-img="bilder/grundrisse/EG.png"
-              />
-              <img
-                src="bilder/grundrisse/EG 3D-small.jpg"
-                alt="Grundriss Erdgeschoss"
-                data-img="bilder/grundrisse/EG 3D.png"
-              />
+              <picture>
+                <source srcset="bilder/grundrisse/EG-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/EG-small.jpg"
+                  alt="Grundriss Erdgeschoss"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/EG.webp"
+                />
+              </picture>
+              <picture>
+                <source srcset="bilder/grundrisse/EG 3D-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/EG 3D-small.jpg"
+                  alt="Grundriss Erdgeschoss"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/EG 3D.webp"
+                />
+              </picture>
            </div>
          </div>
        </div>
@@ -443,16 +491,24 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
              </div>
            </div>
            <div class="floor-plan floor-plan-multi">
-              <img
-                src="bilder/grundrisse/OG 1 2-small.jpg"
-                alt="Grundriss 1. Obergeschoss"
-                data-img="bilder/grundrisse/OG 1 2.png"
-              />
-              <img
-                src="bilder/grundrisse/OG 1 3D-small.jpg"
-                alt="Grundriss 1. Obergeschoss"
-                data-img="bilder/grundrisse/OG 1 3D.png"
-              />
+              <picture>
+                <source srcset="bilder/grundrisse/OG 1 2-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/OG 1 2-small.jpg"
+                  alt="Grundriss 1. Obergeschoss"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/OG 1 2.webp"
+                />
+              </picture>
+              <picture>
+                <source srcset="bilder/grundrisse/OG 1 3D-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/OG 1 3D-small.jpg"
+                  alt="Grundriss 1. Obergeschoss"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/OG 1 3D.webp"
+                />
+              </picture>
            </div>
          </div>
        </div>
@@ -492,16 +548,24 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
              </div>
            </div>
            <div class="floor-plan floor-plan-multi">
-              <img
-                src="bilder/grundrisse/OG 2 grundriss-small.jpg"
-                alt="Grundriss 2. Obergeschoss (1)"
-                data-img="bilder/grundrisse/OG 2 grundriss.png"
-              />
-              <img
-                src="bilder/grundrisse/OG 2 3D-small.jpg"
-                alt="Grundriss 2. Obergeschoss (1)"
-                data-img="bilder/grundrisse/OG 2 3D.png"
-              />
+              <picture>
+                <source srcset="bilder/grundrisse/OG 2 grundriss-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/OG 2 grundriss-small.jpg"
+                  alt="Grundriss 2. Obergeschoss (1)"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/OG 2 grundriss.webp"
+                />
+              </picture>
+              <picture>
+                <source srcset="bilder/grundrisse/OG 2 3D-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/OG 2 3D-small.jpg"
+                  alt="Grundriss 2. Obergeschoss (1)"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/OG 2 3D.webp"
+                />
+              </picture>
            </div>
          </div>
        </div>
@@ -529,16 +593,24 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
              </div>
            </div>
            <div class="floor-plan floor-plan-multi">
-              <img
-                src="bilder/grundrisse/Dachboden unten 2-small.jpg"
-                alt="Grundriss Dachboden"
-                data-img="bilder/grundrisse/Dachboden unten 2.png"
-              />
-              <img
-                src="bilder/grundrisse/Dachboden unten-small.jpg"
-                alt="Grundriss Dachboden"
-                data-img="bilder/grundrisse/Dachboden unten.png"
-              />
+              <picture>
+                <source srcset="bilder/grundrisse/Dachboden unten 2-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/Dachboden unten 2-small.jpg"
+                  alt="Grundriss Dachboden"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/Dachboden unten 2.webp"
+                />
+              </picture>
+              <picture>
+                <source srcset="bilder/grundrisse/Dachboden unten-small.webp" type="image/webp">
+                <img
+                  src="bilder/grundrisse/Dachboden unten-small.jpg"
+                  alt="Grundriss Dachboden"
+                  loading="lazy"
+                  data-img="bilder/grundrisse/Dachboden unten.webp"
+                />
+              </picture>
            </div>
          </div>
        </div>
--- a/js/haus-schleusingen.js
+++ b/js/haus-schleusingen.js
@@ -1,56 +1,86 @@
-$(function () {
+document.addEventListener("DOMContentLoaded", function () {
  // Navbar scroll
-  $(window).on("scroll", function () {
-    if ($(this).scrollTop() > 60) $("#navbar").addClass("scrolled");
-    else $("#navbar").removeClass("scrolled");
+  var navbar = document.getElementById("navbar");
+  window.addEventListener("scroll", function () {
+    if (window.scrollY > 60) navbar.classList.add("scrolled");
+    else navbar.classList.remove("scrolled");
  });

  // Hero animation on load
  setTimeout(function () {
-    $("#heroContent").addClass("visible");
-    $("#heroBg").addClass("loaded");
+    document.getElementById("heroContent").classList.add("visible");
+    document.getElementById("heroBg").classList.add("loaded");
  }, 200);

-  // Scroll animations
-  function checkVisible() {
-    $(".fact, [data-animate]").each(function () {
-      var el = $(this);
-      var top = el.offset().top;
-      var windowBottom = $(window).scrollTop() + $(window).height();
-      if (windowBottom > top + 60) {
-        el.addClass("visible");
-        el.css({ opacity: 1, transform: "translateY(0)" });
-      }
+  // Scroll animations via IntersectionObserver
+  var animElements = document.querySelectorAll(".fact, [data-animate]");
+  animElements.forEach(function (el) {
+    el.style.opacity = "0";
+    el.style.transform = "translateY(30px)";
+    el.style.transition = "opacity 0.8s ease, transform 0.8s ease";
+  });
+
+  if ("IntersectionObserver" in window) {
+    var observer = new IntersectionObserver(
+      function (entries) {
+        entries.forEach(function (entry) {
+          if (entry.isIntersecting) {
+            entry.target.classList.add("visible");
+            entry.target.style.opacity = "1";
+            entry.target.style.transform = "translateY(0)";
+            observer.unobserve(entry.target);
+          }
+        });
+      },
+      { rootMargin: "0px 0px -60px 0px" }
+    );
+    animElements.forEach(function (el) {
+      observer.observe(el);
+    });
+  } else {
+    // Fallback: show all immediately
+    animElements.forEach(function (el) {
+      el.classList.add("visible");
+      el.style.opacity = "1";
+      el.style.transform = "translateY(0)";
    });
  }
-  $("[data-animate]").css({
-    opacity: 0,
-    transform: "translateY(30px)",
-    transition: "opacity 0.8s ease, transform 0.8s ease",
-  });
-  $(window).on("scroll", checkVisible);
-  checkVisible();

  // Floor accordion
-  $(".floor-header").on("click", function () {
-    var item = $(this).closest(".floor-item");
-    var isOpen = item.hasClass("open");
-    $(".floor-item").removeClass("open");
-    $(".floor-header").attr("aria-expanded", "false");
-    $(".floor-body").slideUp(300);
-    if (!isOpen) {
-      item.addClass("open");
-      $(this).attr("aria-expanded", "true");
-      item.find(".floor-body").slideDown(300);
-    }
+  // Floor accordion (vanilla JS + a11y)
+  document.querySelectorAll(".floor-header").forEach(function (header) {
+    header.addEventListener("click", function () {
+      var item = this.closest(".floor-item");
+      var isOpen = item.classList.contains("open");
+      var allItems = document.querySelectorAll(".floor-item");
+
+      // Close all
+      allItems.forEach(function (fi) {
+        fi.classList.remove("open");
+        var hdr = fi.querySelector(".floor-header");
+        if (hdr) hdr.setAttribute("aria-expanded", "false");
+        var body = fi.querySelector(".floor-body");
+        if (body) body.style.display = "none";
+      });
+
+      // Open clicked if it was closed
+      if (!isOpen) {
+        item.classList.add("open");
+        this.setAttribute("aria-expanded", "true");
+        var body = item.querySelector(".floor-body");
+        if (body) body.style.display = "block";
+      }
+    });
  });

  // Accordion keyboard handler (Enter/Space)
-  $(".floor-header").on("keydown", function (e) {
-    if (e.key === "Enter" || e.key === " ") {
-      e.preventDefault();
-      $(this).trigger("click");
-    }
+  document.querySelectorAll(".floor-header").forEach(function (header) {
+    header.addEventListener("keydown", function (e) {
+      if (e.key === "Enter" || e.key === " ") {
+        e.preventDefault();
+        this.click();
+      }
+    });
  });

  // Lightbox – track last focused element for focus return
@@ -58,59 +88,75 @@ $(function () {

  function openLightbox(src) {
    lightboxTrigger = document.activeElement;
-    $("#lightboxImg").attr("src", src).attr("alt", "");
-    $("#lightbox").addClass("open");
-    $("body").css("overflow", "hidden");
+    var img = document.getElementById("lightboxImg");
+    // WebP fallback: if .webp fails, try original format
+    img.onerror = function () {
+      if (img.getAttribute('src').endsWith('.webp')) {
+        img.setAttribute('src', src.replace(/\.webp$/, '.png'));
+      }
+    };
+    img.setAttribute("src", src);
+    img.setAttribute("alt", "");
+    document.getElementById("lightbox").classList.add("open");
+    document.body.style.overflow = "hidden";
    // Set focus to close button
    setTimeout(function () {
-      $("#lightboxClose").focus();
+      document.getElementById("lightboxClose").focus();
    }, 50);
  }

  function closeLightbox() {
-    $("#lightbox").removeClass("open");
-    $("body").css("overflow", "");
+    document.getElementById("lightbox").classList.remove("open");
+    document.body.style.overflow = "";
    // Return focus to trigger
    if (lightboxTrigger) {
-      $(lightboxTrigger).focus();
+      lightboxTrigger.focus();
      lightboxTrigger = null;
    }
  }

  // Lightbox – gallery grid items
-  $(document).on("click", ".grid-item", function () {
-    var src = $(this).data("img") || $(this).find("img").attr("src");
-    openLightbox(src);
+  document.querySelectorAll(".grid-item").forEach(function (item) {
+    item.addEventListener("click", function () {
+      var src = this.dataset.img || this.querySelector("img").getAttribute("src");
+      openLightbox(src);
+    });
+  });
+
+  // Gallery keyboard handler (Enter/Space)
+  document.querySelectorAll(".grid-item").forEach(function (item) {
+    item.setAttribute("tabindex", "0");
+    item.addEventListener("keydown", function (e) {
+      if (e.key === "Enter" || e.key === " ") {
+        e.preventDefault();
+        this.click();
+      }
+    });
  });

  // Lightbox – floor plan images in Raumaufteilung
-  $(document).on("click", ".floor-plan img[data-img]", function () {
-    var src = $(this).data("img");
-    openLightbox(src);
+  document.querySelectorAll(".floor-plan img[data-img]").forEach(function (img) {
+    img.addEventListener("click", function () {
+      openLightbox(this.dataset.img);
+    });
  });

-  // Lightbox close handlers
-  $("#lightboxClose").on("click", function () {
-    closeLightbox();
-  });
-  $("#lightbox").on("click", function (e) {
-    if (e.target === this) {
-      closeLightbox();
-    }
-  });

-  // Escape key to close lightbox
-  $(document).on("keydown", function (e) {
-    if (e.key === "Escape" && $("#lightbox").hasClass("open")) {
-      closeLightbox();
-    }
+
+  document.getElementById("lightboxClose").addEventListener("click", closeLightbox);
+  document.getElementById("lightbox").addEventListener("click", function (e) {
+    if (e.target === this) closeLightbox();
+  });
+  document.addEventListener("keydown", function (e) {
+    if (e.key === "Escape") closeLightbox();
  });

  // Focus trap for lightbox
-  $("#lightbox").on("keydown", function (e) {
+  document.getElementById("lightbox").addEventListener("keydown", function (e) {
    if (e.key !== "Tab") return;

-    var focusable = $(this).find("button, [href], input, select, textarea, [tabindex]:not([tabindex='-1'])").filter(":visible");
+    var focusable = this.querySelectorAll("button, [href], input, select, textarea, [tabindex]:not([tabindex='-1'])");
+    focusable = Array.from(focusable).filter(function (el) { return el.offsetParent !== null; });
    if (focusable.length === 0) return;

    var first = focusable[0];
@@ -129,15 +175,42 @@ $(function () {
    }
  });

-  // Gallery keyboard handler (Enter/Space)
-  $(document).on("keydown", ".grid-item", function (e) {
-    if (e.key === "Enter" || e.key === " ") {
-      e.preventDefault();
-      $(this).trigger("click");
-    }
-  });
-
  // Form submit is handled server-side by PHP – no JS intervention needed.
+  // Form submit – opens email client with pre-filled mailto: link
+  document.getElementById("contactForm").addEventListener("submit", function (e) {
+    e.preventDefault();
+
+    var fname = document.getElementById("fname").value.trim();
+    var lname = document.getElementById("lname").value.trim();
+    var email = document.getElementById("email").value.trim();
+    var phone = document.getElementById("phone").value.trim();
+    var interest = document.getElementById("interest").value;
+    var message = document.getElementById("message").value.trim();
+
+    var subject = "Kontaktanfrage: " + interest;
+    var body = "Von: " + fname + " " + lname + "\n";
+    body += "E-Mail: " + email + "\n";
+    if (phone) body += "Telefon: " + phone + "\n";
+    body += "Anliegen: " + interest + "\n\n";
+    body += message;
+
+    var mailto =
+      "mailto:mki@kies-media.de" +
+      "?subject=" + encodeURIComponent(subject) +
+      "&body=" + encodeURIComponent(body);
+
+    window.location.href = mailto;
+
+    // Show success message
+    this.style.display = "none";
+    var success = document.getElementById("formSuccess");
+    success.style.display = "block";
+    success.style.opacity = "0";
+    success.style.transition = "opacity 0.4s ease";
+    requestAnimationFrame(function () {
+      success.style.opacity = "1";
+    });
+  });
 });

 // Mobile hamburger menu (vanilla JS)
--- a/js/masonry.pkgd.min.js
+++ b/js/masonry.pkgd.min.js
--- a/nginx.conf
+++ b/nginx.conf
@@ -5,7 +5,20 @@ server {
    root /usr/share/nginx/html;
    index haus-schleusingen.html;

+    # Gzip aktivieren
+    gzip on;
+    gzip_types text/css application/javascript image/svg+xml application/json text/xml;
+    gzip_min_length 256;
+    gzip_vary on;
+
    location / {
        try_files $uri $uri/ /haus-schleusingen.html;
    }
+
+    # Lange Cache-Dauer für Bilder und statische Assets
+    location ~* \.(jpg|jpeg|png|webp|gif|ico|svg|css|js|woff2?)$ {
+        expires 30d;
+        add_header Cache-Control "public, immutable";
+        access_log off;
+    }
 }
Author	SHA1	Message	Date
Claw	9c0a9a856a	merge: resolve conflicts with main (WebP + vanilla JS + a11y) All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 32s Details	2026-05-19 13:28:52 +00:00
greggy	4ca48a7445	Merge pull request 'fix: JavaScript doppelte Funktionen & toter Code (#39 )' (#40 ) from feature/39-js-duplicate-functions-fix into main Reviewed-on: #40	2026-05-19 15:13:29 +02:00
Claw	6b13b95102	fix: remove duplicate openLightbox/closeLightbox and dead code (#39 ) All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 26s Details - Consolidate openLightbox() and closeLightbox() to single vanilla JS definition - Remove orphaned keyboard handler block that caused ReferenceError - Refs: #39	2026-05-19 12:41:58 +00:00
greggy	9a8776412e	Merge pull request 'Fix #36 : Favicon erstellen und einbinden' (#37 ) from feature/issue-36-favicon into main	2026-05-15 10:45:31 +02:00
greggy	127faaffaf	feat(favicon): use Außenansicht as favicon base All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 24s Details	2026-05-15 08:43:47 +00:00
greggy	c6eda36750	feat(favicon): add favicon and browser icons for Issue #36 All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 37s Details - favicon.ico (16x16 + 32x32) - favicon-32x32.png, favicon-16x16.png - apple-touch-icon.png (180x180) - site.webmanifest - Linked in index.php head Resolves #36	2026-05-15 08:40:16 +00:00
greggy	336fbc12a6	Merge pull request 'Fix #18 : Accessibility – ARIA-Labels, Focus-Management, Skip-Navigation' (#24 ) from feature/issue-18-accessibility into main	2026-05-15 10:32:45 +02:00
Claw AI	8b73603293	feat(a11y): ARIA labels, focus management, skip-nav, keyboard nav, contrast fix All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 23s Details Accessibility improvements per WCAG 2.1 AA: - Skip-to-content link (TA-1) - ARIA landmarks and roles for nav, main, sections, footer (TA-2) - Accordion keyboard navigation + aria-expanded (TA-3) - Lightbox focus trap + focus management + dialog role (TA-4) - Gallery grid items keyboard accessible (TA-5) - Improved alt texts for all images (TA-6) - Focus-visible styles for all interactive elements (TA-7) - Darker --stone color for WCAG AA contrast compliance (TA-8) Fix #18	2026-05-15 08:32:26 +00:00
greggy	d609175b3c	Merge pull request 'Fix #19 : Remove jQuery dependency, replace with vanilla JS' (#21 ) from feature/issue-19-remove-jquery-masonry into main	2026-05-15 10:29:56 +02:00
Claw (AI)	73635a5f03	fix(js): improve lightbox WebP fallback error handler All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 24s Details - Use .off('error') to prevent stacking error handlers - Simplify fallback logic: only replace .webp → .png on error - Prevents infinite error loops	2026-05-15 07:57:09 +00:00
Claw (AI)	b237cb6315	fix(images): remove unused masonry.js and fix broken references - Delete js/masonry.pkgd.min.js (24 KB, never referenced in HTML) - Fix bad3.jpg → Bad-3.webp reference (was 404) - Fix WhatsApp Image reference → replaced with Bad-4.webp (existing image) - Update data-img attributes to use WebP paths	2026-05-15 07:57:09 +00:00
Claw (AI)	98cb53df09	fix(images): update nginx with gzip and 30d cache headers - Enable gzip for CSS, JS, SVG, JSON, XML - Add 30-day cache headers for static assets (images, CSS, JS, fonts) - Set Cache-Control: public, immutable for static files	2026-05-15 07:57:09 +00:00
Claw (AI)	8666bc1eec	feat(images): convert all images to WebP with 87% size reduction - Convert 34 images (PNG/JPG) to WebP at quality 80 - Total savings: 21.6 MB → 2.8 MB (87% reduction) - Add <picture> elements with WebP source + original fallback - Add loading=lazy to all below-the-fold images - Update lightbox to serve WebP images with error fallback	2026-05-15 07:57:09 +00:00
greggy	1fcdca95b7	refactor(js): remove jQuery dependency and replace with vanilla JS All checks were successful Deploy Feature Branch to Test / deploy (push) Successful in 24s Details - Rewrite haus-schleusingen.js entirely in vanilla JavaScript - Use IntersectionObserver instead of scroll event for scroll animations - Replace jQuery slideUp/slideDown with display toggle for accordion - Replace jQuery fadeIn with CSS opacity transition for form success - Remove jQuery CDN script tag from haus-schleusingen.html - Delete unused masonry.pkgd.min.js - Remove jquery globals from eslint.config.js Ref #19	2026-05-15 07:57:01 +00:00