08거대 워드마크 푸터

<main class="stage">
  <footer class="footer is-demo">
    <nav class="footer__links">
      <span class="footer__link">이용약관</span>
      <span class="footer__link">개인정보처리방침</span>
    </nav>
    <p class="footer__wordmark">KINETIC</p>
  </footer>
</main>

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

$duration: $dur-loop;                              // 빛 띠가 한 번 훑고 돌아오는 시간
$easing: $ease-out;
$color: $subject-blue;                             // 훑고 지나가는 빛 색

@include stage($stage-paper);

.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-6;
  text-align: center;
}
.footer__links {
  display: flex;
  gap: $sp-4;
}
.footer__link {
  color: rgba($subject-ink, .72);   // AA 4.5 (blog-design 글자 대비)
  font-weight: 600;
  font-size: clamp(11px, 2.6vw, 13px);
  line-height: 1;
}
// 거대 워드마크 위로 그라디언트가 한 번 대각선으로 훑는다 — background-clip: text 예외 (033 과 같은 계열)
.footer__wordmark {
  margin: 0;
  font-weight: 800;
  font-size: clamp(36px, 12vw, 80px);
  line-height: 1;
  background: linear-gradient(100deg, $subject-ink 40%, $color 50%, $subject-ink 60%);
  background-size: 250% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: sheen-sweep $duration $easing infinite;
}
@keyframes sheen-sweep {
  0%        { background-position: 200% 0; }
  55%, 100% { background-position: -50% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .footer__wordmark { animation: none; background-position: -50% 0; }
}

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 {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer__links {
  display: flex;
  gap: 16px;
}

.footer__link {
  color: rgba(23, 20, 26, 0.72);
  font-weight: 600;
  font-size: clamp(11px, 2.6vw, 13px);
  line-height: 1;
}

.footer__wordmark {
  margin: 0;
  font-weight: 800;
  font-size: clamp(36px, 12vw, 80px);
  line-height: 1;
  background: linear-gradient(100deg, #17141a 40%, #2f6df6 50%, #17141a 60%);
  background-size: 250% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  animation: sheen-sweep 2s ease-out infinite;
}

@keyframes sheen-sweep {
  0% {
    background-position: 200% 0;
  }
  55%, 100% {
    background-position: -50% 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .footer__wordmark {
    animation: none;
    background-position: -50% 0;
  }
}

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

export type KineticFooterProps = {
  link1?: string;
  link2?: string;
  wordmark?: string;
  /** 빛 띠가 한 번 훑고 돌아오는 시간(기본 2000ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function KineticFooter({
  link1 = "Terms",
  link2 = "Privacy",
  wordmark = "KINETIC",
  duration = 2000,
  easing = "ease-out",
  color = "#2f6df6",
}: KineticFooterProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <footer className={styles.stage} style={vars}>
      <nav className={styles.links}>
        <span className={styles.link}>{link1}</span>
        <span className={styles.link}>{link2}</span>
      </nav>
      <p className={styles.wordmark}>{wordmark}</p>
    </footer>
  );
}