08外側クリックで揺れる

<main class="stage is-demo">
  <div class="overlay"></div>
  <div class="modal" role="dialog" aria-modal="true" aria-labelledby="t8">
    <h2 id="t8">利用規約に同意すると続けられます</h2>
    <p>外側をクリックしても閉じず、少し揺れるだけです。</p>
    <button class="modal__accept" type="button">同意して続ける</button>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;      // 흔들림 지속 시간
$easing: $ease-spring;     // 실제 흔들림엔 별도 cubic-bezier 를 쓴다(아래)
$color: $subject-ink;      // 강조색(버튼)

@include stage($stage-paper);

.stage { position: relative; }

// 닫을 수 없는 모달이라 열린 채로 고정. 오버레이는 어둡게만 유지한다
.overlay {
  position: fixed; inset: 0;
  background: rgba($stage-ink, .45);
}

.modal {
  position: fixed; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: min(80vw, 300px);
  padding: clamp(12px, 4.5vmin, 22px);
  border-radius: $r-card; background: $stage-paper; color: $stage-ink;
  border: 2px solid rgba($stage-ink, .12);
  box-shadow: $shadow-raised;

  h2 { margin: 0 0 6px; font-size: clamp(13px, 4.2vmin, 17px); }
  p  { margin: 0 0 14px; font-size: clamp(10px, 3.2vmin, 13px); color: rgba($stage-ink, .65); }
}

.modal__accept {
  border: 0; border-radius: $r-control; background: $color; color: $stage-paper;
  padding: clamp(7px, 2.6vmin, 9px) clamp(14px, 4.6vmin, 18px);
  font-weight: 600;
  font-size: clamp(11px, 3.4vmin, 13px);
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
}

.modal.is-shaking {
  animation: shake $duration cubic-bezier(.36, .07, .19, .97) both;
  border-color: $error;
}

@keyframes shake {
  10%, 90% { transform: translate(calc(-50% - 3px), -50%); }
  20%, 80% { transform: translate(calc(-50% + 4px), -50%); border-color: $error; }
  30%, 70% { transform: translate(calc(-50% - 4px), -50%); }
  40%, 60% { transform: translate(calc(-50% + 3px), -50%); }
  50%      { transform: translate(calc(-50% - 3px), -50%); border-color: $error; }
}

// 데모: 2초마다 두 번씩 흔든다
.stage.is-demo .modal { animation: shake-loop $dur-loop cubic-bezier(.36, .07, .19, .97) infinite; }

@keyframes shake-loop {
  0%, 40%, 100% { transform: translate(-50%, -50%); border-color: rgba($stage-ink, .12); }
  44%  { transform: translate(calc(-50% - 4px), -50%); border-color: $error; }
  48%  { transform: translate(calc(-50% + 4px), -50%); }
  52%  { transform: translate(calc(-50% - 4px), -50%); border-color: $error; }
  56%  { transform: translate(calc(-50% + 3px), -50%); }
  60%  { transform: translate(-50%, -50%); border-color: rgba($stage-ink, .12); }
}

@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .modal, .modal.is-shaking { animation: none; }
  .modal.is-shaking { border-color: $error; }
}

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

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

.stage {
  position: relative;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(23, 20, 26, 0.45);
}

.modal {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(80vw, 300px);
  padding: clamp(12px, 4.5vmin, 22px);
  border-radius: 16px;
  background: #ffffff;
  color: #17141a;
  border: 2px solid rgba(23, 20, 26, 0.12);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}
.modal h2 {
  margin: 0 0 6px;
  font-size: clamp(13px, 4.2vmin, 17px);
}
.modal p {
  margin: 0 0 14px;
  font-size: clamp(10px, 3.2vmin, 13px);
  color: rgba(23, 20, 26, 0.65);
}

.modal__accept {
  border: 0;
  border-radius: 12px;
  background: #17141a;
  color: #ffffff;
  padding: clamp(7px, 2.6vmin, 9px) clamp(14px, 4.6vmin, 18px);
  font-weight: 600;
  font-size: clamp(11px, 3.4vmin, 13px);
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
}

.modal.is-shaking {
  animation: shake 300ms cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
  border-color: #c2361a;
}

@keyframes shake {
  10%, 90% {
    transform: translate(calc(-50% - 3px), -50%);
  }
  20%, 80% {
    transform: translate(calc(-50% + 4px), -50%);
    border-color: #c2361a;
  }
  30%, 70% {
    transform: translate(calc(-50% - 4px), -50%);
  }
  40%, 60% {
    transform: translate(calc(-50% + 3px), -50%);
  }
  50% {
    transform: translate(calc(-50% - 3px), -50%);
    border-color: #c2361a;
  }
}
.stage.is-demo .modal {
  animation: shake-loop 2s cubic-bezier(0.36, 0.07, 0.19, 0.97) infinite;
}

@keyframes shake-loop {
  0%, 40%, 100% {
    transform: translate(-50%, -50%);
    border-color: rgba(23, 20, 26, 0.12);
  }
  44% {
    transform: translate(calc(-50% - 4px), -50%);
    border-color: #c2361a;
  }
  48% {
    transform: translate(calc(-50% + 4px), -50%);
  }
  52% {
    transform: translate(calc(-50% - 4px), -50%);
    border-color: #c2361a;
  }
  56% {
    transform: translate(calc(-50% + 3px), -50%);
  }
  60% {
    transform: translate(-50%, -50%);
    border-color: rgba(23, 20, 26, 0.12);
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .modal, .modal.is-shaking {
    animation: none;
  }
  .modal.is-shaking {
    border-color: #c2361a;
  }
}

// 실제 클릭: 바깥(overlay)을 누르면 닫히는 대신 흔들린다.
(function () {
  var stage = document.querySelector('.stage');
  var overlay = document.querySelector('.overlay');
  var modal = document.querySelector('.modal');
  overlay.addEventListener('click', function () {
    stage.classList.remove('is-demo');
    modal.classList.remove('is-shaking');
    void modal.offsetWidth;
    modal.classList.add('is-shaking');
  });
  modal.addEventListener('animationend', function (e) {
    if (e.animationName === 'shake') modal.classList.remove('is-shaking');
  });
})();

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

export type ShakeOutsideModalProps = {
  title: string;
  description: string;
  acceptLabel: string;
  onAccept?: () => void;
  /** 흔들림 지속 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function ShakeOutsideModal({
  title,
  description,
  acceptLabel,
  onAccept,
  duration = 300,
  easing = "cubic-bezier(.36,.07,.19,.97)",
  color = "#17141a",
}: ShakeOutsideModalProps) {
  const [shakeKey, setShakeKey] = useState(0);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.stage} style={vars}>
      <div className={styles.overlay} onClick={() => setShakeKey((k) => k + 1)} />
      <div
        key={shakeKey}
        className={shakeKey ? `${styles.modal} ${styles.isShaking}` : styles.modal}
        role="dialog"
        aria-modal="true"
      >
        <h2>{title}</h2>
        <p>{description}</p>
        <button type="button" className={styles.accept} onClick={onAccept}>
          {acceptLabel}
        </button>
      </div>
    </div>
  );
}