05Input head-shake

<main class="stage">
  <div class="hs is-demo">
    <label class="hs__label" for="hs-pw">Confirm password</label>
    <input class="hs__input" id="hs-pw" type="password" value="wrongpass" readonly>
    <p class="hs__msg">Passwords don't match</p>
  </div>
</main>

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

$duration: 900ms;                                 // 고개를 젓는 전체 길이
$easing: $ease-out;
$color: $error;

@include stage($stage-ink);

.hs { width: min(260px, 86vw); display: flex; flex-direction: column; gap: $sp-2; perspective: 500px; }
.hs__label { font-weight: 600; font-size: 12px; line-height: 1; font-family: inherit; color: $subject-cream; }
.hs__input {
  box-sizing: border-box;
  width: 100%;
  padding: $sp-2 $sp-3;
  border-radius: $r-sm;
  border: 2px solid $color;
  background: rgba(255, 255, 255, .06);
  color: $subject-cream;
  font-weight: 400;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
}
.hs__msg { margin: 0; color: $error-soft; font-weight: 500; font-size: 11px; line-height: 1.3; font-family: inherit; }

@keyframes hs-shake {
  0% { transform: translateX(0); }
  6.5% { transform: translateX(-6px) rotateY(-9deg); }
  18.5% { transform: translateX(5px) rotateY(7deg); }
  31.5% { transform: translateX(-3px) rotateY(-5deg); }
  43.5% { transform: translateX(2px) rotateY(3deg); }
  50%, 100% { transform: translateX(0); }
}
// 실제 동작: 비밀번호 확인이 어긋나면 .hs--shake 가 한 번 붙는다
.hs__input.hs--shake { animation: hs-shake $duration $easing; }

// 데모 루프
.hs.is-demo .hs__input { animation: hs-shake $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .hs__input.hs--shake,
  .hs.is-demo .hs__input { animation: none !important; }
}

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);
}

.hs {
  width: min(260px, 86vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
  perspective: 500px;
}

.hs__label {
  font-weight: 600;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
  color: #fff7e6;
}

.hs__input {
  box-sizing: border-box;
  width: 100%;
  padding: 8px 12px;
  border-radius: 8px;
  border: 2px solid #c2361a;
  background: rgba(255, 255, 255, 0.06);
  color: #fff7e6;
  font-weight: 400;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
}

.hs__msg {
  margin: 0;
  color: #ffe0d8;
  font-weight: 500;
  font-size: 11px;
  line-height: 1.3;
  font-family: inherit;
}

@keyframes hs-shake {
  0% {
    transform: translateX(0);
  }
  6.5% {
    transform: translateX(-6px) rotateY(-9deg);
  }
  18.5% {
    transform: translateX(5px) rotateY(7deg);
  }
  31.5% {
    transform: translateX(-3px) rotateY(-5deg);
  }
  43.5% {
    transform: translateX(2px) rotateY(3deg);
  }
  50%, 100% {
    transform: translateX(0);
  }
}
.hs__input.hs--shake {
  animation: hs-shake 900ms ease-out;
}

.hs.is-demo .hs__input {
  animation: hs-shake 900ms ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .hs__input.hs--shake,
  .hs.is-demo .hs__input {
    animation: none !important;
  }
}

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

export type HeadShakeInputProps = {
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function HeadShakeInput({ duration = 900, easing = "ease-out", color = "#c2361a" }: HeadShakeInputProps) {
  const [run, setRun] = useState(0);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.hs} style={vars}>
      <label className={styles.label} htmlFor="hs-pw">비밀번호 확인</label>
      <input
        key={run}
        id="hs-pw"
        className={`${styles.input} ${styles.shake}`}
        type="password"
        defaultValue="wrongpass"
        readOnly
        onFocus={() => setRun((n) => n + 1)}
      />
      <p className={styles.msg}>비밀번호가 일치하지 않습니다</p>
    </div>
  );
}