02ぐらぐら回転

<main class="stage">
  <div class="wg is-demo">
    <label class="wg__row" for="wg-agree">
      <input class="wg__checkbox" type="checkbox" id="wg-agree">
      <span class="wg__text">利用規約に同意します</span>
    </label>
    <p class="wg__msg">続けるには規約への同意が必要です</p>
  </div>
</main>

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

$duration: 600ms;                                 // 비틀거림 한 번의 길이
$easing: $ease-out;
$color: $error;

@include stage($stage-yellow);

.wg { width: min(280px, 86vw); display: flex; flex-direction: column; gap: $sp-2; }
.wg__row {
  display: flex;
  align-items: center;
  gap: $sp-2;
  transform-origin: left center; // 규칙8: 왼쪽 끝축 흔들림 회전
  cursor: pointer;
}
.wg__checkbox { width: 18px; height: 18px; accent-color: $color; }
.wg__text { font-weight: 500; font-size: 13px; line-height: 1.3; font-family: inherit; color: $subject-ink; }
.wg__msg { margin: 0; display: inline-block; padding: $sp-1 $sp-2; border-radius: $r-xs; background: $stage-paper; color: $color; font-weight: 500; font-size: 11px; line-height: 1.3; font-family: inherit; }

@keyframes wg-wiggle {
  0%, 100% { transform: rotate(0); }
  15% { transform: rotate(-4deg); }
  30% { transform: rotate(4deg); }
  45% { transform: rotate(-3deg); }
  60% { transform: rotate(3deg); }
  75% { transform: rotate(-1.5deg); }
  90% { transform: rotate(1.5deg); }
}
// 실제 동작: 체크 없이 제출하면 .wg--wiggle 이 한 번 붙는다
.wg__row.wg--wiggle { animation: wg-wiggle $duration $easing; }

// 데모 루프
.wg.is-demo .wg__row { animation: wg-wiggle $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .wg__row.wg--wiggle,
  .wg.is-demo .wg__row { 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: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.wg {
  width: min(280px, 86vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.wg__row {
  display: flex;
  align-items: center;
  gap: 8px;
  transform-origin: left center;
  cursor: pointer;
}

.wg__checkbox {
  width: 18px;
  height: 18px;
  accent-color: #c2361a;
}

.wg__text {
  font-weight: 500;
  font-size: 13px;
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.wg__msg {
  margin: 0;
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  background: #ffffff;
  color: #c2361a;
  font-weight: 500;
  font-size: 11px;
  line-height: 1.3;
  font-family: inherit;
}

@keyframes wg-wiggle {
  0%, 100% {
    transform: rotate(0);
  }
  15% {
    transform: rotate(-4deg);
  }
  30% {
    transform: rotate(4deg);
  }
  45% {
    transform: rotate(-3deg);
  }
  60% {
    transform: rotate(3deg);
  }
  75% {
    transform: rotate(-1.5deg);
  }
  90% {
    transform: rotate(1.5deg);
  }
}
.wg__row.wg--wiggle {
  animation: wg-wiggle 600ms ease-out;
}

.wg.is-demo .wg__row {
  animation: wg-wiggle 600ms ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .wg__row.wg--wiggle,
  .wg.is-demo .wg__row {
    animation: none !important;
  }
}

import { useState } from "react";
import type { CSSProperties, ChangeEvent } from "react";
import styles from "./WiggleRotate.module.scss";

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

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

export default function WiggleRotate({ duration = 600, easing = "ease-out", color = "#c2361a" }: WiggleRotateProps) {
  const [checked, setChecked] = useState(false);
  const [run, setRun] = useState(0);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  const submit = () => {
    if (!checked) setRun((n) => n + 1);
  };

  return (
    <div className={styles.wg} style={vars}>
      <label key={run} className={`${styles.row} ${!checked ? styles.wiggle : ""}`} htmlFor="wg-agree">
        <input id="wg-agree" type="checkbox" checked={checked} onChange={(e: ChangeEvent<HTMLInputElement>) => setChecked(e.target.checked)} />
        <span className={styles.text}>이용약관에 동의합니다</span>
      </label>
      <button type="button" className={styles.btn} onClick={submit}>제출</button>
      <p className={styles.msg}>계속하려면 약관에 동의해야 합니다</p>
    </div>
  );
}