style: apply accessibility badge contrast refinements and update primary color to #4E77FF

refer_landing_page/app/_components/DirectionsBlock.tsx

@@ -48,7 +48,7 @@ export function DirectionsBlock() {
               <span className="font-mono text-xs uppercase tracking-wider text-ink-mute w-20 pt-0.5">
                 관련 기관
               </span>
-              <div className="flex flex-wrap gap-x-4 gap-y-1 text-xs font-mono text-cobalt">
+              <div className="flex flex-wrap gap-x-4 gap-y-1 text-xs font-mono text-cobalt-dark dark:text-cobalt">
                 <a href="http://www.knu.ac.kr/" target="_blank" rel="noreferrer" className="hover:underline">
                   경북대학교 (KNU) ↗
                 </a>

refer_landing_page/app/_components/ProjectPageView.tsx

@@ -85,12 +85,12 @@ export function ProjectPageView() {
               ) : proj.standardsTrack ? (
                 <div className="flex items-baseline justify-between gap-2">
                   <span className="text-ink-mute">Standards Track:</span>
-                  <span className="text-cobalt font-bold">{proj.standardsTrack}</span>
+                  <span className="text-cobalt-dark dark:text-cobalt font-bold">{proj.standardsTrack}</span>
                 </div>
               ) : proj.standardsOrg ? (
                 <div className="flex items-baseline justify-between gap-2">
                   <span className="text-ink-mute">Organization:</span>
-                  <span className="text-cobalt font-bold">{proj.standardsOrg}</span>
+                  <span className="text-cobalt-dark dark:text-cobalt font-bold">{proj.standardsOrg}</span>
                 </div>
               ) : null}