Ajust lightbox

style.css

@@ -210,11 +210,22 @@ html.luxtools-noscroll body {
     padding: 0.8em;
 }
 
-.luxtools-lightbox img.luxtools-lightbox-img {
+.luxtools-lightbox .luxtools-lightbox-media {
+    position: relative;
+    display: inline-block;
     max-width: 100%;
     max-height: 100%;
 }
 
+.luxtools-lightbox img.luxtools-lightbox-img {
+    display: block;
+    /* Use viewport constraints so tall images always fit.
+     * Percent max-height is unreliable here because the wrapper doesn't have a fixed height.
+     */
+    max-width: calc(100vw - 1.6em);
+    max-height: calc(100vh - 1.6em);
+}
+
 .luxtools-lightbox .luxtools-lightbox-caption {
     position: absolute;
     left: 0;
@@ -230,64 +241,67 @@ html.luxtools-noscroll body {
     text-align: center;
 }
 
-/* Top-left "open in new tab" button. */
-.luxtools-lightbox button.luxtools-lightbox-opennew {
-    left: 0.6em;
-    top: 0.6em;
-    bottom: auto;
-    width: 2.4em;
-    height: 2.4em;
-    background: transparent;
-    border: none;
-    border-radius: 0.2em;
-    z-index: 2;
-}
-
-
-.luxtools-lightbox button.luxtools-lightbox-btn {
+/* Image-anchored prev/next zones.
+ * These are sized relative to the displayed image (not the viewport) and show
+ * a subtle indicator only on hover/focus.
+ */
+.luxtools-lightbox button.luxtools-lightbox-zone {
     position: absolute;
-    cursor: pointer;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    color: #fff;
-}
-
-/* Navigation: transparent left/right tap zones (default everywhere). */
-.luxtools-lightbox button.luxtools-lightbox-prev,
-.luxtools-lightbox button.luxtools-lightbox-next {
     top: 0;
     bottom: 0;
-    width: 30%;
+    width: 25%;
     background: transparent;
     border: none;
     padding: 0;
-    font-size: 2em;
-    color: rgba(255, 255, 255, 0.7);
+    cursor: pointer;
 }
 
-.luxtools-lightbox button.luxtools-lightbox-prev {
+.luxtools-lightbox button.luxtools-lightbox-zone-prev {
     left: 0;
 }
 
-.luxtools-lightbox button.luxtools-lightbox-next {
+.luxtools-lightbox button.luxtools-lightbox-zone-next {
     right: 0;
 }
 
-/* Close button overlays content. */
-.luxtools-lightbox button.luxtools-lightbox-close {
-    top: 0.6em;
-    right: 0.6em;
-    width: 2.2em;
-    height: 2.2em;
-    background: transparent;
-    border: none;
-    z-index: 2;
+.luxtools-lightbox button.luxtools-lightbox-zone::after {
+    position: absolute;
+    top: 50%;
+    transform: translateY(-50%);
+    font-size: 3em;
+    line-height: 1;
+    display: inline-flex;
+    justify-content: center;
+    box-sizing: border-box;
+    min-height: 1.1em;
+    color: rgba(255, 255, 255, 0.95);
+    background: rgba(0, 0, 0, 0.35);
+    border: 1px solid rgba(255, 255, 255, 0.25);
+    border-radius: 999px;
+    padding: 0 0.28em;
+    text-shadow: 0 0 0.4em rgba(0, 0, 0, 0.9);
+    opacity: 0;
+    transition: opacity 120ms ease-in-out;
+    pointer-events: none;
+}
+
+.luxtools-lightbox button.luxtools-lightbox-zone-prev::after {
+    content: '‹';
+    left: 0.35em;
+}
+
+.luxtools-lightbox button.luxtools-lightbox-zone-next::after {
+    content: '›';
+    right: 0.35em;
+}
+
+.luxtools-lightbox button.luxtools-lightbox-zone:hover::after,
+.luxtools-lightbox button.luxtools-lightbox-zone:focus-visible::after {
+    opacity: 1;
 }
 
 @media (max-width: 600px) {
-    .luxtools-lightbox button.luxtools-lightbox-prev,
-    .luxtools-lightbox button.luxtools-lightbox-next {
-        font-size: 1.6em;
+    .luxtools-lightbox button.luxtools-lightbox-zone::after {
+        font-size: 2.4em;
     }
 }