Add accessilbilty check and fixes

assets/css/_schedule.css

@@ -68,16 +68,16 @@
   }
 }
 
-/* Lined up with the time on the cards. */
+/* Lined up with the time on the cards, but in normal weight to stay in the background.
+   No transparency: it has to keep text contrast. */
 .schedule__hour-label {
   display: block;
   padding: calc(0.5rem + 0.25rem) 0.75rem 0.5rem calc(0.75rem + 3px);
   font-family: var(--ff-alt);
   font-size: var(--fs-s);
-  font-weight: bold;
+  font-weight: normal;
   font-variant-numeric: tabular-nums;
   color: var(--color-text-meta);
-  opacity: 0.45;
 }
 
 .schedule__day-title {
@@ -202,6 +202,11 @@
 }
 
 @container (width < 48rem) {
+  /* Keeps a focused card from scrolling under the sticky day picker. */
+  .schedule__title {
+    scroll-margin-block-start: 6rem;
+  }
+
   .schedule__picker:not([hidden]) {
     position: sticky;
     inset-block-start: 0;