08色紙ストリップのフッター

<main class="stage">
  <footer class="pfoot">
    <div class="pfoot__cols">
      <div class="pfoot__col">
        <p class="pfoot__h">工作室</p>
        <p class="pfoot__l">紹介</p>
        <p class="pfoot__l">記録</p>
      </div>
      <div class="pfoot__col">
        <p class="pfoot__h">素材</p>
        <p class="pfoot__l">色紙</p>
        <p class="pfoot__l">ステッカー</p>
      </div>
      <div class="pfoot__col">
        <p class="pfoot__h">ヘルプ</p>
        <p class="pfoot__l">お問い合わせ</p>
        <p class="pfoot__l">利用規約</p>
      </div>
    </div>
    <div class="pfoot__strip" aria-hidden="true">
      <div class="pfoot__track">
        <span class="pfoot__bit pfoot__bit--coral"></span>
        <span class="pfoot__bit pfoot__bit--butter"></span>
        <span class="pfoot__bit pfoot__bit--leaf"></span>
        <span class="pfoot__bit pfoot__bit--sky"></span>
        <span class="pfoot__bit pfoot__bit--coral"></span>
        <span class="pfoot__bit pfoot__bit--butter"></span>
        <span class="pfoot__bit pfoot__bit--leaf"></span>
        <span class="pfoot__bit pfoot__bit--sky"></span>
      </div>
    </div>
  </footer>
</main>

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

// 페이퍼컷 팔레트
$paper-base:   #fbf6ec;
$paper-sheet:  #ffffff;
$paper-ink:    #2a2320;
$paper-stone:  #5c5048;
$paper-coral:  #b97b71;
$paper-sky:    #6a8db5;
$paper-leaf:   #2b7d5a;
$paper-butter: #d6c9ab;
$paper-edge:   #e7dccb;

$duration: $dur-loop;   // 색종이 띠가 한 벌만큼 흘러가는 주기
$easing: linear;        // 흐름은 일정 속도라야 이음매가 안 보인다
$color: $paper-edge;    // 푸터 종이의 아래 두께

@include stage($paper-butter);

.pfoot {
  box-sizing: border-box;
  width: clamp(264px, 86vw, 388px);
  padding: $sp-5 $sp-5 0;
  border-radius: $r-card;
  background: $paper-sheet;
  box-shadow: 0 6px 0 $color;
  overflow: hidden;
}
.pfoot__cols {
  display: flex;
  gap: $sp-6;
  margin-bottom: $sp-4;
}
.pfoot__col { flex: 1 1 0; }
.pfoot__h {
  margin: 0 0 $sp-2;
  color: $paper-ink;
  font-weight: 800; font-size: 12px; line-height: 1;
  font-family: inherit;
}
.pfoot__l {
  margin: 0 0 $sp-1;
  color: $paper-stone;
  font-weight: 500; font-size: 11px; line-height: 1.3;
  font-family: inherit;
}

// 아래 색종이 띠 — 같은 네 조각을 두 벌 넣고 한 벌만큼(-50%) 민다. 끝에서 처음으로 튀는 순간이 없다
.pfoot__strip {
  overflow: hidden;
  margin: 0 #{-$sp-5};
  padding: $sp-2 0;
  background: $paper-base;
}
.pfoot__track {
  display: flex;
  width: max-content;
  animation: stripFlow $duration $easing infinite;
}
.pfoot__bit {
  flex: 0 0 auto;
  width: 36px;
  height: $sp-5;
  margin-right: $sp-3;   // 간격은 gap 이 아니라 margin — 2N 조각 사이 gap 은 2N-1 개라 -50% 가 어긋난다
  border-radius: $r-xs;
}
.pfoot__bit--coral  { background: $paper-coral; }
.pfoot__bit--butter { background: $paper-butter; }
.pfoot__bit--leaf   { background: $paper-leaf; }
.pfoot__bit--sky    { background: $paper-sky; }

// 데모: 트랙 전체가 정확히 한 벌(=전체 폭의 50%)만큼 왼쪽으로 흐른 뒤 처음 상태와 완전히 같아진다
@keyframes stripFlow {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

@media (max-width: 340px), (max-height: 220px) {
  .pfoot { width: 276px; padding: $sp-3 $sp-3 0; }
  .pfoot__cols { gap: $sp-3; margin-bottom: $sp-2; }
  .pfoot__h { font-size: 10px; margin-bottom: $sp-1; }
  .pfoot__l { font-size: 9px; }
  .pfoot__strip { margin: 0 #{-$sp-3}; padding: $sp-1 0; }
  .pfoot__bit { width: 24px; height: $sp-4; margin-right: $sp-2; }
}

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

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #d6c9ab;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.pfoot {
  box-sizing: border-box;
  width: clamp(264px, 86vw, 388px);
  padding: 20px 20px 0;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 6px 0 #e7dccb;
  overflow: hidden;
}

.pfoot__cols {
  display: flex;
  gap: 24px;
  margin-bottom: 16px;
}

.pfoot__col {
  flex: 1 1 0;
}

.pfoot__h {
  margin: 0 0 8px;
  color: #2a2320;
  font-weight: 800;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
}

.pfoot__l {
  margin: 0 0 4px;
  color: #5c5048;
  font-weight: 500;
  font-size: 11px;
  line-height: 1.3;
  font-family: inherit;
}

.pfoot__strip {
  overflow: hidden;
  margin: 0 -20px;
  padding: 8px 0;
  background: #fbf6ec;
}

.pfoot__track {
  display: flex;
  width: max-content;
  animation: stripFlow 2s linear infinite;
}

.pfoot__bit {
  flex: 0 0 auto;
  width: 36px;
  height: 20px;
  margin-right: 12px;
  border-radius: 4px;
}

.pfoot__bit--coral {
  background: #b97b71;
}

.pfoot__bit--butter {
  background: #d6c9ab;
}

.pfoot__bit--leaf {
  background: #2b7d5a;
}

.pfoot__bit--sky {
  background: #6a8db5;
}

@keyframes stripFlow {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .pfoot {
    width: 276px;
    padding: 12px 12px 0;
  }
  .pfoot__cols {
    gap: 12px;
    margin-bottom: 8px;
  }
  .pfoot__h {
    font-size: 10px;
    margin-bottom: 4px;
  }
  .pfoot__l {
    font-size: 9px;
  }
  .pfoot__strip {
    margin: 0 -12px;
    padding: 4px 0;
  }
  .pfoot__bit {
    width: 24px;
    height: 16px;
    margin-right: 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .pfoot__track {
    animation: none !important;
    transform: none;
  }
}

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

export type FooterColumn = { head: string; links: string[] };

export type PaperFooterProps = {
  columns?: FooterColumn[];
  /** 띠에 놓을 색종이 색 한 벌. 컴포넌트가 두 벌로 복제한다 */
  chips?: string[];
  /** 한 벌만큼 흐르는 시간(기본 2000ms) */
  duration?: number;
};

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

export default function PaperFooter({
  columns = [
    { head: "공작실", links: ["소개", "기록"] },
    { head: "재료", links: ["색종이", "스티커"] },
    { head: "도움말", links: ["문의", "약관"] },
  ],
  chips = ["#cc3d26", "#f6c453", "#2b7d5a", "#2f6fb8"],
  duration = 2000,
}: PaperFooterProps) {
  const vars: Vars = { "--duration": `${duration}ms` };
  // 한 벌을 그대로 두 번 깔아야 -50% 지점이 첫 프레임과 완전히 같아진다 (이음매 없음)
  const track = [...chips, ...chips];

  return (
    <footer className={styles.pfoot} style={vars}>
      <div className={styles.cols}>
        {columns.map((c) => (
          <div key={c.head} className={styles.col}>
            <p className={styles.h}>{c.head}</p>
            {c.links.map((l) => <p key={l} className={styles.l}>{l}</p>)}
          </div>
        ))}
      </div>
      <div className={styles.strip} aria-hidden="true">
        <div className={styles.track}>
          {track.map((c, i) => <span key={`${c}-${i}`} className={styles.bit} style={{ background: c }} />)}
        </div>
      </div>
    </footer>
  );
}