cards that shine

components/TiltCard.tsx

@@ -4,6 +4,24 @@ import type { Tilt } from '@/types';
 
 const ZERO_ROTATION = 'rotateX(0deg) rotateY(0deg)';
 
+const tiltSheen = (sheen: HTMLDivElement, tiltX: number, tiltY: number) => {
+	const rect = sheen.getBoundingClientRect();
+	const centerX = rect.width / 2;
+	const centerY = rect.height / 2;
+	const sheenX = centerX + (tiltY / -20) * centerX;
+	const sheenY = centerY + (tiltX / 20) * centerY;
+
+	sheen.style.opacity = '1';
+	sheen.style.backgroundImage = `
+			radial-gradient(
+				circle at
+				${sheenX}px ${sheenY}px,
+				#ffffff44,
+				#0000000f
+			)
+		`;
+};
+
 export default function TiltCard({
 	children,
 	cardIndex,
@@ -14,6 +32,7 @@ export default function TiltCard({
 	className?: string;
 }) {
 	const cardRef = useRef<HTMLDivElement>(null);
+	const sheenRef = useRef<HTMLDivElement>(null);
 	const [untilt, setUntilt] = useState(false);
 	const {
 		gameData,
@@ -24,7 +43,8 @@ export default function TiltCard({
 
 	useEffect(() => {
 		const card = cardRef.current;
-		if (!card) return;
+		const sheen = sheenRef.current;
+		if (!card || !sheen) return;
 
 		if (tilt) {
 			const rotateX = localTilts[cardIndex]?.rotateX || 0;
@@ -47,7 +67,12 @@ export default function TiltCard({
 
 			if (count && (totalX || totalY)) {
 				setUntilt(false);
-				card.style.transform = `rotateX(${totalX / count}deg) rotateY(${totalY / count}deg)`;
+
+				const x = totalX / count;
+				const y = totalY / count;
+
+				card.style.transform = `rotateX(${x}deg) rotateY(${y}deg)`;
+				tiltSheen(sheen, x, y);
 			} else {
 				setUntilt(true);
 			}
@@ -58,9 +83,11 @@ export default function TiltCard({
 
 	useEffect(() => {
 		const card = cardRef.current;
-		if (!card || !untilt) return;
+		const sheen = sheenRef.current;
+		if (!card || !sheen || !untilt) return;
 
 		card.style.transform = ZERO_ROTATION;
+		sheen.style.opacity = '0';
 	}, [untilt]);
 
 	const handleMouseMove = (e: React.MouseEvent) => {
@@ -88,7 +115,7 @@ export default function TiltCard({
 
 	return (
 		<div
-			className={`${className}`}
+			className={`group ${className}`}
 			onMouseMove={tilt ? handleMouseMove : undefined}
 			onMouseLeave={handleMouseLeave}
 		>
@@ -98,6 +125,10 @@ export default function TiltCard({
 				className={`h-full w-full transition-transform ${untilt ? 'duration-500' : 'duration-0'}`}
 			>
 				{children}
+				<div
+					ref={sheenRef}
+					className="pointer-events-none absolute inset-0 rounded-lg bg-gradient-to-tr from-transparent via-white/20 to-transparent mix-blend-screen opacity-0 transition-opacity duration-500"
+				/>
 			</div>
 		</div>
 	);