03一度使うと線が引かれるバックアップコード

<main class="stage">
  <section class="bc is-demo" id="bc" data-copied="0">
    <h2 class="bc__title">バックアップコード</h2>
    <ul class="bc__grid">
      <li class="bc__code" data-code="1">D4K9-P2M7<span class="bc__strike" data-strike="1"></span></li>
      <li class="bc__code" data-code="2">X8R3-T6W1<span class="bc__strike" data-strike="2"></span></li>
      <li class="bc__code bc__code--used" data-code="3">Q5N8-J2H4<span class="bc__strike" data-strike="3"></span></li>
      <li class="bc__code" data-code="4">M7V2-C9L5<span class="bc__strike" data-strike="4"></span></li>
      <li class="bc__code" data-code="5">R3F6-B8K2<span class="bc__strike" data-strike="5"></span></li>
      <li class="bc__code bc__code--used" data-code="6">H9T4-N5D7<span class="bc__strike" data-strike="6"></span></li>
    </ul>
    <button class="bc__copy" type="button" id="bc-copy">
      <span class="bc__ic" aria-hidden="true"><svg viewBox="0 0 256 256" width="16" height="16"><g fill="currentColor"><path d="M216 40v128h-48V88H88V40Z" opacity=".2"/><path d="M216 32H88a8 8 0 0 0-8 8v40H40a8 8 0 0 0-8 8v128a8 8 0 0 0 8 8h128a8 8 0 0 0 8-8v-40h40a8 8 0 0 0 8-8V40a8 8 0 0 0-8-8m-56 176H48V96h112Zm48-48h-32V88a8 8 0 0 0-8-8H96V48h112Z"/></g></svg></span>
      <span class="bc__labels">
        <span class="bc__label" data-label="copy">すべてコピー</span>
        <span class="bc__label" data-label="done">コピー済み</span>
      </span>
    </button>
    <p class="bc__live" role="status" aria-live="polite"><span class="bc__say">バックアップコード6個をクリップボードにコピーしました</span></p>
  </section>
</main>

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

$duration: $dur-quick;
$easing: $ease-spring;
$color: $subject-mint;

@include stage($stage-orange);

.bc {
  box-sizing: border-box;
  width: min(320px, 88vw);
  padding: $sp-3;
  border-radius: $r-card;
  background-color: $subject-cream;
  color: $subject-ink;
  box-shadow: $shadow-raised;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.bc__title {
  margin: 0 0 $sp-2;
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
}

// 코드 6개 — 2열 격자
.bc__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: $sp-1;
  margin: 0 0 $sp-3;
  padding: 0;
  list-style: none;
}
.bc__code {
  position: relative;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  border-radius: $r-sm;
  background-color: rgba($subject-ink, .08);
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
}

// 이미 쓴 코드 — 가운데 줄이 그어지고 흐려진다
.bc__code--used {
  color: rgba($subject-ink, .72);   // AA 4.5 (.38 은 6.50 기준 2.35:1 이었다)
  text-decoration: line-through 2px rgba($subject-ink, .72);
}

// 취소선은 왼쪽부터 자라는 막대로도 덧얹는다 (scaleX)
.bc__strike {
  position: absolute;
  left: $sp-2;
  right: $sp-2;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  border-radius: $r-pill;
  background-color: $error;
  transform: scaleX(0);
  transform-origin: left center; // 규칙8: 좌변서 그어짐
  transition: transform $duration $easing;
}

.bc__copy {
  position: relative;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: $sp-1;
  width: 100%;
  height: 34px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: $r-control;
  background-color: $color;
  color: $subject-ink;
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
  cursor: pointer;
}
.bc__copy:focus-visible { outline: 3px solid $subject-cream; outline-offset: 2px; }
.bc__ic { display: inline-flex; flex: 0 0 auto; }
.bc__ic svg { display: block; }
// 두 라벨을 같은 격자 칸에 겹쳐 둔다 — 절대배치로 띄우면 복사 아이콘 위에 글자가 얹힌다
.bc__labels { display: grid; }
.bc__label { grid-area: 1 / 1; opacity: 0; }

// 사람이 실제로 누른 경로 — 복사되면 라벨이 갈렸다가 1.6초 뒤 돌아온다
.bc:not(.is-demo)[data-copied="1"] .bc__label[data-label="done"],
.bc:not(.is-demo)[data-copied="0"] .bc__label[data-label="copy"] { opacity: 1; }
.bc:not(.is-demo)[data-copied="1"] .bc__copy { background-color: $subject-blue; color: $subject-cream; }

.bc__live {
  margin: $sp-2 0 0;
  height: 15px;
  font-size: 10px;
  line-height: 15px;
  font-weight: 500;
  color: rgba($subject-ink, .64);
  white-space: nowrap;
  opacity: 0;
}
.bc:not(.is-demo)[data-copied="1"] .bc__live { opacity: 1; }

// ── 자동 루프 ──
// 취소선이 한 칸씩 자라다가(0~46%) 마지막 칸에서 복사 완료로 갈린다(52%). 복사 표시는 지우지 않고 86% 까지 유지한다
.bc.is-demo .bc__strike[data-strike="3"] {
  animation-name: bc-grow3;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
@keyframes bc-grow3 {
  0%   { transform: scaleX(0); }
  4%   { transform: scaleX(0); }
  14%  { transform: scaleX(1); }
  86%  { transform: scaleX(1); }
  92%  { transform: scaleX(1); }
  100% { transform: scaleX(1); }
}
.bc.is-demo .bc__strike[data-strike="6"] {
  animation-name: bc-grow6;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
@keyframes bc-grow6 {
  0%   { transform: scaleX(0); }
  16%  { transform: scaleX(0); }
  26%  { transform: scaleX(1); }
  86%  { transform: scaleX(1); }
  92%  { transform: scaleX(1); }
  100% { transform: scaleX(1); }
}
.bc.is-demo .bc__strike[data-strike="1"] {
  animation-name: bc-grow1;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}
@keyframes bc-grow1 {
  0%   { transform: scaleX(0); }
  28%  { transform: scaleX(0); }
  38%  { transform: scaleX(1); }
  86%  { transform: scaleX(1); }
  92%  { transform: scaleX(1); }
  100% { transform: scaleX(1); }
}
.bc.is-demo .bc__strike[data-strike="4"] {
  animation-name: bc-grow4;
  animation-duration: $dur-loop;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
}
@keyframes bc-grow4 {
  0%   { transform: scaleX(0); }
  40%  { transform: scaleX(0); }
  46%  { transform: scaleX(1); }
  86%  { transform: scaleX(1); }
  92%  { transform: scaleX(1); }
  100% { transform: scaleX(1); }
}

// 복사 완료 컷 — 라벨과 알림 줄은 steps 로 한 프레임에 갈린다. 퇴장 재현 금지: 86% 이후로 끌어내리지 않는다
.bc.is-demo .bc__label,
.bc.is-demo .bc__live,
.bc.is-demo .bc__copy {
  animation-duration: $dur-loop;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}
.bc.is-demo .bc__label[data-label="copy"] { animation-name: bc-label-copy; }
.bc.is-demo .bc__label[data-label="done"] { animation-name: bc-label-done; }
@keyframes bc-label-copy {
  0%   { opacity: 1; }
  52%  { opacity: 0; }
  86%  { opacity: 1; }
  100% { opacity: 1; }
}
@keyframes bc-label-done {
  0%   { opacity: 0; }
  52%  { opacity: 1; }
  86%  { opacity: 1; }
  100% { opacity: 0; }
}
.bc.is-demo .bc__live { animation-name: bc-say; }
@keyframes bc-say {
  0%   { opacity: 0; }
  52%  { opacity: 1; }
  86%  { opacity: 1; }
  100% { opacity: 0; }
}
.bc.is-demo .bc__copy { animation-name: bc-skin; }
@keyframes bc-skin {
  0%   { background-color: $color; color: $subject-ink; }
  52%  { background-color: $subject-blue; color: $subject-cream; }
  86%  { background-color: $subject-blue; color: $subject-cream; }
  100% { background-color: $color; color: $subject-ink; }
}

@media (max-width: 340px) {
  .bc { padding: $sp-2; }
  .bc__title { margin: 0 0 $sp-1; font-size: 12px; line-height: 16px; }
  .bc__grid { gap: 4px; margin: 0 0 $sp-2; }
  .bc__code { height: 22px; font-size: 11px; line-height: 16px; letter-spacing: 0; }
  .bc__copy { height: 28px; font-size: 12px; line-height: 16px; }
  .bc__live { margin: $sp-1 0 0; height: 14px; font-size: 9px; line-height: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .bc.is-demo .bc__strike,
  .bc.is-demo .bc__label,
  .bc.is-demo .bc__live,
  .bc.is-demo .bc__copy { animation: none !important; }
  .bc__strike { transition: none !important; }
  .bc.is-demo .bc__label[data-label="copy"] { opacity: 1 !important; }
  .bc.is-demo .bc__strike[data-strike="3"],
  .bc.is-demo .bc__strike[data-strike="6"] { transform: scaleX(1) !important; }
}

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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.bc {
  box-sizing: border-box;
  width: min(320px, 88vw);
  padding: 12px;
  border-radius: 16px;
  background-color: #fff7e6;
  color: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.bc__title {
  margin: 0 0 8px;
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
}

.bc__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.bc__code {
  position: relative;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  border-radius: 8px;
  background-color: rgba(23, 20, 26, 0.08);
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
}

.bc__code--used {
  color: rgba(23, 20, 26, 0.72);
  text-decoration: line-through 2px rgba(23, 20, 26, 0.72);
}

.bc__strike {
  position: absolute;
  left: 8px;
  right: 8px;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  border-radius: 999px;
  background-color: #c2361a;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.bc__copy {
  position: relative;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 100%;
  height: 34px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background-color: #4cd4a6;
  color: #17141a;
  font-size: 13px;
  line-height: 18px;
  font-weight: 700;
  cursor: pointer;
}

.bc__copy:focus-visible {
  outline: 3px solid #fff7e6;
  outline-offset: 2px;
}

.bc__ic {
  display: inline-flex;
  flex: 0 0 auto;
}

.bc__ic svg {
  display: block;
}

.bc__labels {
  display: grid;
}

.bc__label {
  grid-area: 1/1;
  opacity: 0;
}

.bc:not(.is-demo)[data-copied="1"] .bc__label[data-label=done],
.bc:not(.is-demo)[data-copied="0"] .bc__label[data-label=copy] {
  opacity: 1;
}

.bc:not(.is-demo)[data-copied="1"] .bc__copy {
  background-color: #2f6df6;
  color: #fff7e6;
}

.bc__live {
  margin: 8px 0 0;
  height: 15px;
  font-size: 10px;
  line-height: 15px;
  font-weight: 500;
  color: rgba(23, 20, 26, 0.64);
  white-space: nowrap;
  opacity: 0;
}

.bc:not(.is-demo)[data-copied="1"] .bc__live {
  opacity: 1;
}

.bc.is-demo .bc__strike[data-strike="3"] {
  animation-name: bc-grow3;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes bc-grow3 {
  0% {
    transform: scaleX(0);
  }
  4% {
    transform: scaleX(0);
  }
  14% {
    transform: scaleX(1);
  }
  86% {
    transform: scaleX(1);
  }
  92% {
    transform: scaleX(1);
  }
  100% {
    transform: scaleX(1);
  }
}
.bc.is-demo .bc__strike[data-strike="6"] {
  animation-name: bc-grow6;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes bc-grow6 {
  0% {
    transform: scaleX(0);
  }
  16% {
    transform: scaleX(0);
  }
  26% {
    transform: scaleX(1);
  }
  86% {
    transform: scaleX(1);
  }
  92% {
    transform: scaleX(1);
  }
  100% {
    transform: scaleX(1);
  }
}
.bc.is-demo .bc__strike[data-strike="1"] {
  animation-name: bc-grow1;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
  animation-delay: 0s;
}

@keyframes bc-grow1 {
  0% {
    transform: scaleX(0);
  }
  28% {
    transform: scaleX(0);
  }
  38% {
    transform: scaleX(1);
  }
  86% {
    transform: scaleX(1);
  }
  92% {
    transform: scaleX(1);
  }
  100% {
    transform: scaleX(1);
  }
}
.bc.is-demo .bc__strike[data-strike="4"] {
  animation-name: bc-grow4;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
}

@keyframes bc-grow4 {
  0% {
    transform: scaleX(0);
  }
  40% {
    transform: scaleX(0);
  }
  46% {
    transform: scaleX(1);
  }
  86% {
    transform: scaleX(1);
  }
  92% {
    transform: scaleX(1);
  }
  100% {
    transform: scaleX(1);
  }
}
.bc.is-demo .bc__label,
.bc.is-demo .bc__live,
.bc.is-demo .bc__copy {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
}

.bc.is-demo .bc__label[data-label=copy] {
  animation-name: bc-label-copy;
}

.bc.is-demo .bc__label[data-label=done] {
  animation-name: bc-label-done;
}

@keyframes bc-label-copy {
  0% {
    opacity: 1;
  }
  52% {
    opacity: 0;
  }
  86% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes bc-label-done {
  0% {
    opacity: 0;
  }
  52% {
    opacity: 1;
  }
  86% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
.bc.is-demo .bc__live {
  animation-name: bc-say;
}

@keyframes bc-say {
  0% {
    opacity: 0;
  }
  52% {
    opacity: 1;
  }
  86% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
.bc.is-demo .bc__copy {
  animation-name: bc-skin;
}

@keyframes bc-skin {
  0% {
    background-color: #4cd4a6;
    color: #17141a;
  }
  52% {
    background-color: #2f6df6;
    color: #fff7e6;
  }
  86% {
    background-color: #2f6df6;
    color: #fff7e6;
  }
  100% {
    background-color: #4cd4a6;
    color: #17141a;
  }
}
@media (max-width: 340px) {
  .bc {
    padding: 8px;
  }
  .bc__title {
    margin: 0 0 4px;
    font-size: 12px;
    line-height: 16px;
  }
  .bc__grid {
    gap: 4px;
    margin: 0 0 8px;
  }
  .bc__code {
    height: 22px;
    font-size: 11px;
    line-height: 16px;
    letter-spacing: 0;
  }
  .bc__copy {
    height: 28px;
    font-size: 12px;
    line-height: 16px;
  }
  .bc__live {
    margin: 4px 0 0;
    height: 14px;
    font-size: 9px;
    line-height: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .bc.is-demo .bc__strike,
  .bc.is-demo .bc__label,
  .bc.is-demo .bc__live,
  .bc.is-demo .bc__copy {
    animation: none !important;
  }
  .bc__strike {
    transition: none !important;
  }
  .bc.is-demo .bc__label[data-label=copy] {
    opacity: 1 !important;
  }
  .bc.is-demo .bc__strike[data-strike="3"],
  .bc.is-demo .bc__strike[data-strike="6"] {
    transform: scaleX(1) !important;
  }
}

// 실제 동작: 전체 복사는 navigator.clipboard.writeText 로 실제로 쓰고, 라벨이 잠깐 갈렸다 돌아오며 같은 말이 읽힌다
var root = document.getElementById('bc');
var btn = document.getElementById('bc-copy');
var live = root.querySelector('.bc__live');
var t = 0;
var fullCode = function () {
  var cs = root.querySelectorAll('.bc__code');
  var out = [];
  for (var i = 0; i < cs.length; i++) out.push(cs[i].firstChild.nodeValue);
  return out.join('\n');
};
btn.addEventListener('click', function () {
  root.classList.remove('is-demo');        // 사람이 만졌으니 자동 루프를 끈다
  clearTimeout(t);
  root.setAttribute('data-copied', '1');
  var txt = fullCode();
  if (navigator.clipboard && navigator.clipboard.writeText) {
    navigator.clipboard.writeText(txt);
  }
  live.textContent = 'バックアップコード6個をクリップボードにコピーしました';
  t = setTimeout(function () { root.setAttribute('data-copied', '0'); }, 1600);
});

import { useRef, useState } from "react";
import type { CSSProperties, ReactNode } from "react";
import styles from "./BackupCodesCard.module.scss";

export type BackupCode = { id: string; value: string; used?: boolean };
export type BackupCodesCardProps = {
  title?: string;
  codes?: BackupCode[];
  copyLabel?: string;
  doneLabel?: string;
  sayText?: string;
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type Timer = ReturnType<typeof setTimeout>;

const COPY: ReactNode = (
  <g fill="currentColor">
    <path d="M216 40v128h-48V88H88V40Z" opacity=".2" />
    <path d="M216 32H88a8 8 0 0 0-8 8v40H40a8 8 0 0 0-8 8v128a8 8 0 0 0 8 8h128a8 8 0 0 0 8-8v-40h40a8 8 0 0 0 8-8V40a8 8 0 0 0-8-8m-56 176H48V96h112Zm48-48h-32V88a8 8 0 0 0-8-8H96V48h112Z" />
  </g>
);

const DEFAULT_CODES: BackupCode[] = [
  { id: "c1", value: "D4K9-P2M7" },
  { id: "c2", value: "X8R3-T6W1" },
  { id: "c3", value: "Q5N8-J2H4", used: true },
  { id: "c4", value: "M7V2-C9L5" },
  { id: "c5", value: "R3F6-B8K2" },
  { id: "c6", value: "H9T4-N5D7", used: true },
];

export default function BackupCodesCard({
  title = "백업 코드",
  codes = DEFAULT_CODES,
  copyLabel = "전체 복사",
  doneLabel = "복사됨",
  sayText = "백업 코드 6개를 클립보드에 복사했습니다",
  duration = 220,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#4cd4a6",
}: BackupCodesCardProps) {
  const [demo, setDemo] = useState(true);
  const [copied, setCopied] = useState(false);
  const t = useRef<Timer>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  // 전체 복사는 navigator.clipboard.writeText 로 실제로 쓰고, 라벨이 잠깐 갈렸다 돌아오며 같은 말이 읽힌다
  function copy() {
    setDemo(false); // 사람이 만졌으니 자동 루프를 끈다
    if (t.current !== null) clearTimeout(t.current);
    setCopied(true);
    if (typeof navigator !== "undefined" && navigator.clipboard && navigator.clipboard.writeText) {
      navigator.clipboard.writeText(codes.map((c: BackupCode) => c.value).join("\n"));
    }
    t.current = setTimeout(() => setCopied(false), 1600);
  }

  return (
    <section className={`${styles.bc} ${demo ? styles.isDemo : ""}`} style={vars} data-copied={copied ? "1" : "0"}>
      <h2 className={styles.title}>{title}</h2>
      <ul className={styles.grid}>
        {codes.map((c: BackupCode) => (
          <li key={c.id} className={`${styles.code} ${c.used ? styles.codeUsed : ""}`} data-code={c.id}>
            {c.value}
            <span className={styles.strike} data-strike={c.id} />
          </li>
        ))}
      </ul>
      <button className={styles.copyBtn} type="button" onClick={copy}>
        <span className={styles.ic} aria-hidden="true">
          <svg viewBox="0 0 256 256" width="16" height="16">{COPY}</svg>
        </span>
        <span className={styles.labels}>
          <span className={styles.label} data-label="copy">{copyLabel}</span>
          <span className={styles.label} data-label="done">{doneLabel}</span>
        </span>
      </button>
      <p className={styles.live} role="status" aria-live="polite">{sayText}</p>
    </section>
  );
}