Improve accessibility and polish page styling

app/downloads/page.tsx

@@ -14,8 +14,8 @@ export default async function Downloads() {
   return (
     <>
       <Header />
-      <main className="section page-content">
-        <article className="tool-card" style={{ marginBottom: 40 }}>
+      <main className="section page-content" id="main-content" tabIndex={-1}>
+        <article className="tool-card desktop-download-card">
           <span className="eyebrow">{t("MINEGEO DESKTOP")}</span>
           <h2>{t("Your next expedition, on your desktop.")}</h2>
           <p className="muted">
@@ -26,7 +26,7 @@ export default async function Downloads() {
           <a className="button primary" href={desktopRelease.file} download>
             <Download size={16} /> {t("Download for Windows")}
           </a>
-          <p className="muted" style={{ marginTop: 16 }}>
+          <p className="muted desktop-download-version">
             {t(
               "Windows 10/11 · 64-bit · Version {version} · Internet required",
               { version: desktopRelease.version },
@@ -87,10 +87,9 @@ export default async function Downloads() {
               ) ? (
                 <a
                   key={version}
-                  className="button primary"
+                  className="button primary download-build-link"
                   href={`/tools/mod/minegeo-fabric-${version}-${release}.jar`}
                   download
-                  style={{ marginRight: 8, marginBottom: 8 }}
                 >
                   <Download size={16} /> {t("Download Fabric mod")} · {version}
                 </a>
@@ -100,7 +99,7 @@ export default async function Downloads() {
                 </p>
               ),
             )}
-            <p className="muted" style={{ fontSize: 11, marginTop: 20 }}>
+            <p className="muted tool-card-note tool-card-note-spaced">
               {t(
                 "Install the JAR in your Minecraft mods folder alongside Fabric API.",
               )}
@@ -156,7 +155,7 @@ export default async function Downloads() {
                 ". The manifest appears when export finishes. Upload sends the latest completed export; it does not capture the world.",
               )}
             </p>
-            <p className="muted" style={{ fontSize: 11 }}>
+            <p className="muted tool-card-note">
               {t(
                 "Put the JAR in plugins/ and restart. Set server-name and server-address in plugins/MineGeo/config.yml, then run /minegeo reload. Permission: minegeo.admin. The same plugin JAR supports all three versions.",
               )}