try to fix page width etc

style/shiny/base.css

@@ -33,8 +33,7 @@ body {
   box-shadow: 0 0 3em var(--shadow);
   position: relative;
 
-  max-width: 1200px;
-  padding: 2em 1.5em;
+  padding: 2em 4em;
   margin: 2em auto 3.5em;
   border-radius: 1.5em;
 

style/shiny/gallery.css

@@ -4,11 +4,18 @@
   --image-size: 200px;
 }
 
+body {
+  --gap: 1em;
+  max-width: calc(5 * var(--image-size) + 4 * var(--gap));
+  padding-left: 4em;
+  padding-right: 4em;
+}
+
 .grid {
   padding: 0;
   display: grid;
   grid-template-columns: repeat(auto-fill, var(--image-size));
-  grid-gap: 1em;
+  grid-gap: var(--gap);
   justify-content: center;
 }
 

style/shiny/single.css

@@ -4,6 +4,10 @@
   --image-width: 1000px;
 }
 
+body {
+  max-width: var(--image-width);
+}
+
 #mainfig {
   margin: 1em auto;
   width: min-content;
@@ -61,6 +65,7 @@
   padding: 0;
   display: flex;
   align-items: flex-start;
+  flex-flow: row wrap;
 }
 
 .alts ul {
@@ -95,7 +100,7 @@
   grid-template-columns: 10% auto;
   grid-gap: 2em;
   align-items: baseline;
-  width: calc(var(--image-width) - 10%);
+  max-width: 80%;
   margin: auto;
 }
 
@@ -114,9 +119,11 @@ footer {
     font-size: 200%;
     border-width: 2px;
   }
+  footer {
+    font-size: 150%;
+  }
 }
 
-
 @media (prefers-reduced-motion: no-preference) {
   .alts label {
     transition-property: color, background;