08Link groups as their own tiles

<main class="stage">
  <footer class="footer">
    <div class="footer__tile is-demo">
      <p class="footer__head">Product</p>
      <p class="footer__link">Features</p>
    </div>
    <div class="footer__tile is-demo">
      <p class="footer__head">Company</p>
      <p class="footer__link">About</p>
    </div>
    <div class="footer__tile is-demo">
      <p class="footer__head">Support</p>
      <p class="footer__link">Help center</p>
    </div>
  </footer>
</main>

@use "../../../../site/static/demo-tokens" as *;

$duration: $dur-loop;      // 세 칸이 차례로 밝아지는 한 주기
$easing: $ease-out;        // 등장 곡선
$color: $subject-blue;     // 링크 강조 색

@include stage($stage-paper);

.footer {
  width: clamp(240px, 84vw, 380px);
  display: flex;
  gap: clamp(8px, 2.4vw, 12px);
}
.footer__tile {
  flex: 1;
  border-radius: $r-card;
  background: rgba($subject-ink, .04);
  padding: clamp(12px, 3.4vw, 16px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: tileReveal $duration $easing infinite;
}
.footer__tile:nth-child(2) { animation-delay: -0.66s; }
.footer__tile:nth-child(3) { animation-delay: -1.33s; }
.footer__head {
  margin: 0;
  color: $subject-ink;
  opacity: .72;   // AA 4.5 (blog-design 글자 대비)
  font-weight: 700; font-size: clamp(9.5px, 2.2vw, 11px); line-height: 1;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.footer__link {
  margin: 0;
  color: $subject-ink;
  font-weight: 600; font-size: clamp(11px, 2.6vw, 12.5px); line-height: 1.3;
}

// 데모: 칸마다 살짝 떠오르며 나타났다가 가라앉는다 — 세 칸이 순서대로 (시차)
@keyframes tileReveal {
  0%   { opacity: .35; transform: translateY(8px) scale(.97); }
  35%  { opacity: 1;   transform: translateY(0) scale(1); }
  65%  { opacity: 1;   transform: translateY(0) scale(1); }
  100% { opacity: .35; transform: translateY(8px) scale(.97); }
}

@media (prefers-reduced-motion: reduce) {
  .footer__tile {
    animation: none !important;
    opacity: 1;
    transform: none;
  }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffffff;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.footer {
  width: clamp(240px, 84vw, 380px);
  display: flex;
  gap: clamp(8px, 2.4vw, 12px);
}

.footer__tile {
  flex: 1;
  border-radius: 16px;
  background: rgba(23, 20, 26, 0.04);
  padding: clamp(12px, 3.4vw, 16px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: tileReveal 2s ease-out infinite;
}

.footer__tile:nth-child(2) {
  animation-delay: -0.66s;
}

.footer__tile:nth-child(3) {
  animation-delay: -1.33s;
}

.footer__head {
  margin: 0;
  color: #17141a;
  opacity: 0.72;
  font-weight: 700;
  font-size: clamp(9.5px, 2.2vw, 11px);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer__link {
  margin: 0;
  color: #17141a;
  font-weight: 600;
  font-size: clamp(11px, 2.6vw, 12.5px);
  line-height: 1.3;
}

@keyframes tileReveal {
  0% {
    opacity: 0.35;
    transform: translateY(8px) scale(0.97);
  }
  35% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  65% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0.35;
    transform: translateY(8px) scale(0.97);
  }
}
@media (prefers-reduced-motion: reduce) {
  .footer__tile {
    animation: none !important;
    opacity: 1;
    transform: none;
  }
}

import type { CSSProperties } from "react";
import styles from "./BentoFooter.module.scss";

export type BentoFooterProps = {
  groups?: { head: string; link: string }[];
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

export default function BentoFooter({
  groups = [
    { head: "Product", link: "Features" },
    { head: "Company", link: "About" },
    { head: "Support", link: "Help center" },
  ],
  duration = 2000,
  easing = "ease-out",
  color = "#2f6df6",
}: BentoFooterProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <footer className={styles.footer} style={vars}>
      {groups.map((g, i) => (
        <div key={g.head} className={styles.tile} style={{ animationDelay: `${-i * 0.66}s` }}>
          <p className={styles.head}>{g.head}</p>
          <p className={styles.link}>{g.link}</p>
        </div>
      ))}
    </footer>
  );
}