feat(glossaire): harmonize portal pages with shared components

src/components/GlossaryPortalSection.astro

@@ -0,0 +1,67 @@
+---
+interface Props {
+  id: string;
+  title: string;
+  count?: string;
+  intro?: string;
+  final?: boolean;
+  className?: string;
+}
+
+const {
+  id,
+  title,
+  count,
+  intro,
+  final = false,
+  className,
+} = Astro.props;
+---
+
+<section class:list={["glossary-portal-section", final && "glossary-portal-section--final", className]}>
+  <div class="glossary-portal-section__head">
+    <h2 id={id}>{title}</h2>
+    {count && <span class="glossary-portal-section__count">{count}</span>}
+  </div>
+
+  {intro && <p class="glossary-portal-section__intro">{intro}</p>}
+
+  <slot />
+</section>
+
+<style>
+  .glossary-portal-section{
+    margin-top: 34px;
+    scroll-margin-top: calc(var(--sticky-offset-px, 96px) + 28px);
+  }
+
+  .glossary-portal-section h2{
+    scroll-margin-top: calc(var(--sticky-offset-px, 96px) + 28px);
+  }
+
+  .glossary-portal-section__head{
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+    gap: 12px;
+    flex-wrap: wrap;
+    margin-bottom: 10px;
+    position: static;
+  }
+
+  .glossary-portal-section__count{
+    font-size: 13px;
+    opacity: .72;
+    white-space: nowrap;
+  }
+
+  .glossary-portal-section__intro{
+    max-width: 78ch;
+    margin: 0;
+    opacity: .92;
+  }
+
+  .glossary-portal-section--final{
+    margin-top: 42px;
+  }
+</style>