09프로모 푸터

<main class="stage">
  <footer class="pt">
    <span class="pt__sheen" aria-hidden="true"></span>
    <div class="pt__top">
      <span class="pt__mark" aria-hidden="true"></span>
      <p class="pt__tagline">캠페인이 끝나도 계속 씁니다</p>
    </div>
    <div class="pt__group">
      <button type="button" class="pt__group-toggle" aria-expanded="true">바로가기</button>
      <div class="pt__links-wrap is-open">
        <ul class="pt__links">
          <li><a href="#">요금제</a></li>
          <li><a href="#">이용약관</a></li>
          <li><a href="#">문의하기</a></li>
        </ul>
      </div>
    </div>
  </footer>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;                                 // 링크 목록 펼침
$easing: $ease-spring;
$color: $subject-blue;

@include stage($stage-ink);

.pt {
  position: relative;
  width: min(400px, 96vw);
  padding-top: $sp-4;
  overflow: hidden;
}
.pt__sheen {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, $subject-blue, transparent);
  animation: pt-sheen 2.6s linear infinite;
}
@keyframes pt-sheen {
  0%   { transform: translateX(-100%); opacity: 0; }
  15%  { opacity: 1; }
  85%  { opacity: 1; }
  100% { transform: translateX(100%); opacity: 0; }
}

.pt__top { display: flex; align-items: center; gap: $sp-2; margin-bottom: $sp-3; }
.pt__mark { width: 22px; height: 22px; border-radius: $r-sm; background: $subject-blue; }
.pt__tagline { margin: 0; font-weight: 600; font-size: 11px; line-height: 1.3; font-family: inherit; color: rgba(255, 247, 230, .55); }

.pt__group { border-top: 1px solid rgba(255, 247, 230, .12); padding-top: $sp-2; }
.pt__group-toggle {
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: left;
  border: 0;
  cursor: pointer;
  padding: $sp-1 0;
  background: transparent;
  color: $subject-cream;
  font-weight: 700; font-size: 11px; line-height: 1; font-family: inherit;
  letter-spacing: .04em;
}
.pt__links-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows $duration $easing;
}
.pt__links-wrap.is-open { grid-template-rows: 1fr; }
.pt__links { list-style: none; margin: 0; padding: 0; overflow: hidden; }
.pt__links li { padding-top: $sp-2; }
.pt__links a {
  color: rgba(255, 247, 230, .68);
  text-decoration: none;
  font-weight: 500; font-size: 12px; line-height: 1.6; font-family: inherit;
}

// ── 접근성 ──────────────────────────────────────────
@media (prefers-reduced-motion: reduce) {
  .pt__sheen { animation: none !important; opacity: 0 !important; }
  .pt__links-wrap { transition: none !important; }
}

// ── 반응형(320×200) ──────────────────────────────────
@media (max-width: 340px), (max-height: 220px) {
  .pt__tagline, .pt__mark { display: none; }
  .pt { padding-top: $sp-2; }
  .pt__top { margin-bottom: $sp-2; }
  .pt__group { padding-top: $sp-1; }
  .pt__links li { padding-top: $sp-1; }
  .pt__links a { font-size: 11px; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.pt {
  position: relative;
  width: min(400px, 96vw);
  padding-top: 16px;
  overflow: hidden;
}

.pt__sheen {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #2f6df6, transparent);
  animation: pt-sheen 2.6s linear infinite;
}

@keyframes pt-sheen {
  0% {
    transform: translateX(-100%);
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  85% {
    opacity: 1;
  }
  100% {
    transform: translateX(100%);
    opacity: 0;
  }
}
.pt__top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.pt__mark {
  width: 22px;
  height: 22px;
  border-radius: 8px;
  background: #2f6df6;
}

.pt__tagline {
  margin: 0;
  font-weight: 600;
  font-size: 11px;
  line-height: 1.3;
  font-family: inherit;
  color: rgba(255, 247, 230, 0.55);
}

.pt__group {
  border-top: 1px solid rgba(255, 247, 230, 0.12);
  padding-top: 8px;
}

.pt__group-toggle {
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: left;
  border: 0;
  cursor: pointer;
  padding: 4px 0;
  background: transparent;
  color: #fff7e6;
  font-weight: 700;
  font-size: 11px;
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.04em;
}

.pt__links-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pt__links-wrap.is-open {
  grid-template-rows: 1fr;
}

.pt__links {
  list-style: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.pt__links li {
  padding-top: 8px;
}

.pt__links a {
  color: rgba(255, 247, 230, 0.68);
  text-decoration: none;
  font-weight: 500;
  font-size: 12px;
  line-height: 1.6;
  font-family: inherit;
}

@media (prefers-reduced-motion: reduce) {
  .pt__sheen {
    animation: none !important;
    opacity: 0 !important;
  }
  .pt__links-wrap {
    transition: none !important;
  }
}
@media (max-width: 340px), (max-height: 220px) {
  .pt__tagline, .pt__mark {
    display: none;
  }
  .pt {
    padding-top: 8px;
  }
  .pt__top {
    margin-bottom: 8px;
  }
  .pt__group {
    padding-top: 4px;
  }
  .pt__links li {
    padding-top: 4px;
  }
  .pt__links a {
    font-size: 11px;
  }
}

// 실제 동작: "바로가기" 를 누르면 aria-expanded 가 바뀌고 링크 목록이 실제로 접히고 펼쳐진다(모바일 푸터 패턴).
var toggle = document.querySelector('.pt__group-toggle');
var links = document.querySelector('.pt__links-wrap');
toggle.addEventListener('click', function () {
  var open = toggle.getAttribute('aria-expanded') === 'true';
  toggle.setAttribute('aria-expanded', String(!open));
  links.classList.toggle('is-open', !open);
});

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

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

export default function PromoFooter({ duration = 300, easing = "cubic-bezier(.2,.8,.2,1)", color = "#2f6df6" }: PromoFooterProps) {
  const [open, setOpen] = useState(true);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <footer className={styles.pt} style={vars}>
      <span className={styles.sheen} aria-hidden="true" />
      <div className={styles.top}>
        <span className={styles.mark} aria-hidden="true" />
        <p className={styles.tagline}>캠페인이 끝나도 계속 씁니다</p>
      </div>
      <div className={styles.group}>
        <button type="button" className={styles.groupToggle} aria-expanded={open} onClick={() => setOpen((v) => !v)}>
          바로가기
        </button>
        <div className={`${styles.linksWrap} ${open ? styles.isOpen : ""}`}>
          <ul className={styles.links}>
            <li><a href="#">요금제</a></li>
            <li><a href="#">이용약관</a></li>
            <li><a href="#">문의하기</a></li>
          </ul>
        </div>
      </div>
    </footer>
  );
}