Add Gallery page (per-event albums + lightbox); remove video-thumbnail blur

- New multilingual Gallery page (en/mk/si) with 9 event albums and a
  keyboard-accessible lightbox (prev/next scoped per album)
- Reuses existing event photos; links each album to its event post
- New css/pages/_gallery.css + setupGallery() lightbox in main.js
- "Gallery" link added to the "What We Do" nav (desktop + mobile) site-wide
- Gallery URLs added to sitemap.xml with hreflang
- Landing "Every Student Has a Story": removed backdrop blur on the video
  thumbnail, kept the bluish gradient tint

Note: images/original/ (458 MB of raw source photos, gitignored + unused by
the site) moved out of the working tree to reclaim disk.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

css/pages/_gallery.css

@@ -0,0 +1,88 @@
+/* ==========================================================================
+   Gallery page (albums per event + lightbox)
+   ========================================================================== */
+.gallery-page { padding-top: 80px; background: #FFFFFF; }
+
+.gallery-hero {
+    background: linear-gradient(180deg, #F1F7F9 0%, #FFFFFF 100%);
+    padding: 56px 24px 40px;
+    text-align: center;
+}
+.gallery-hero-inner { max-width: 760px; margin: 0 auto; }
+.gallery-eyebrow {
+    font-weight: 700; font-size: 14px; letter-spacing: 0.06em;
+    text-transform: uppercase; color: #2D738C; margin: 0 0 10px;
+}
+.gallery-hero h1 {
+    font-size: clamp(32px, 5vw, 48px); line-height: 1.12;
+    color: #101828; margin: 0 0 14px; font-weight: 700;
+}
+.gallery-lead { font-size: 18px; line-height: 28px; color: #475467; margin: 0; }
+
+.gallery-albums { max-width: 1120px; margin: 0 auto; padding: 24px 24px 80px; }
+.album { margin-top: 52px; }
+.album:first-child { margin-top: 24px; }
+.album-head {
+    display: flex; align-items: baseline; justify-content: space-between;
+    gap: 16px; margin-bottom: 16px; flex-wrap: wrap;
+    border-bottom: 1px solid #EAECF0; padding-bottom: 12px;
+}
+.album-head h2 { font-size: 22px; color: #101828; margin: 0; font-weight: 700; }
+.album-link {
+    color: #2D738C; font-weight: 600; font-size: 15px;
+    text-decoration: none; white-space: nowrap;
+    display: inline-flex; align-items: center; gap: 6px;
+}
+.album-link:hover { text-decoration: underline; }
+.album-link i { font-size: 12px; }
+
+.gallery-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+    gap: 10px;
+}
+.gallery-thumb {
+    padding: 0; border: none; background: #EEF2F4;
+    border-radius: 10px; overflow: hidden; cursor: pointer;
+    aspect-ratio: 4 / 3; display: block;
+}
+.gallery-thumb img {
+    width: 100%; height: 100%; object-fit: cover; display: block;
+    transition: transform 0.4s ease;
+}
+.gallery-thumb:hover img { transform: scale(1.05); }
+.gallery-thumb:focus-visible { outline: 2px solid #2D738C; outline-offset: 2px; }
+
+/* ---------- Lightbox ---------- */
+.lightbox {
+    position: fixed; inset: 0; z-index: 2000;
+    display: none; align-items: center; justify-content: center;
+    background: rgba(9, 18, 26, 0.92); padding: 24px;
+}
+.lightbox.is-open { display: flex; }
+.lightbox-img {
+    max-width: 92vw; max-height: 82vh; object-fit: contain;
+    border-radius: 6px; box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
+}
+.lightbox-close, .lightbox-prev, .lightbox-next {
+    position: absolute; background: rgba(255, 255, 255, 0.12);
+    color: #FFFFFF; border: none; cursor: pointer; border-radius: 50%;
+    width: 48px; height: 48px; font-size: 24px; line-height: 1;
+    display: flex; align-items: center; justify-content: center;
+    transition: background 0.15s ease;
+}
+.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255, 255, 255, 0.25); }
+.lightbox-close { top: 20px; right: 20px; font-size: 28px; }
+.lightbox-prev { left: 20px; top: 50%; transform: translateY(-50%); }
+.lightbox-next { right: 20px; top: 50%; transform: translateY(-50%); }
+.lightbox-caption {
+    position: absolute; bottom: 18px; left: 0; right: 0;
+    text-align: center; color: rgba(255, 255, 255, 0.85);
+    font-size: 14px; padding: 0 24px;
+}
+@media (max-width: 600px) {
+    .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 6px; }
+    .lightbox-prev { left: 8px; }
+    .lightbox-next { right: 8px; }
+    .lightbox-close { top: 12px; right: 12px; }
+}

css/pages/_home.css

@@ -178,7 +178,6 @@
     width: 100%;
     height: 100%;
     background: linear-gradient(127.76deg, rgba(19, 49, 60, 0.92) -13.16%, rgba(39, 77, 90, 0.08) 98.5%);
-    backdrop-filter: blur(6px);
     border-radius: 16px;
 }