05Glass modal

<main class="stage">
  <div class="gm-scene is-demo">
    <input type="checkbox" id="gm-open" class="gm-check">
    <label class="gm-trigger" for="gm-open">Delete item</label>
    <div class="gm-overlay"></div>
    <div class="gm-modal gm-focal">
      <span class="gm-modal__title">Delete this file?</span>
      <span class="gm-modal__desc">This can't be undone.</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-enter;
$easing: $ease-spring;
$color: $subject-blue;

@include stage($stage-ink);

// 트리거는 위쪽에, 모달은 장면 전체를 덮는 오버레이 안에서 따로 중앙 정렬한다 —
// 처음엔 둘 다 grid place-items:center 로 같은 자리에 겹쳐 렌더됐다 (실측: poster.png 에서 글자가 포개짐)
.gm-scene {
  position: relative;
  box-sizing: border-box;
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: flex;
  justify-content: center;
  padding-top: $sp-4;
}

.gm-check { position: absolute; opacity: 0; pointer-events: none; }

.gm-trigger {
  position: relative;
  z-index: 0;
  align-self: flex-start;
  box-sizing: border-box;
  padding: $sp-2 $sp-4;
  border-radius: $r-control;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .3);
  color: $subject-cream;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  cursor: pointer;
}

.gm-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, .35);
  opacity: 0;
  transition: opacity $duration $easing;
  pointer-events: none;
}

.gm-modal {
  position: absolute;
  inset: 0;
  margin: auto;
  z-index: 2;
  box-sizing: border-box;
  width: min(210px, 74%);
  height: fit-content;
  padding: $sp-5 $sp-4;
  border-radius: $r-card;
  background: rgba(255, 255, 255, .18);
  border: 1px solid rgba(255, 255, 255, .38);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: $shadow-raised;
  display: flex;
  flex-direction: column;
  gap: $sp-2;
  color: $subject-cream;
  font: 600 12px/1.4 -apple-system, "Segoe UI", sans-serif;
  opacity: 0;
  transform: scale(.85);
  transition: opacity $duration $easing, transform $duration $easing;
  pointer-events: none;
}
.gm-modal__title { font-size: 14px; font-weight: 700; }
.gm-modal__desc { opacity: .8; font-weight: 500; }

// 실사용: 체크박스 상태만으로 오버레이 + 모달이 열린다
.gm-check:checked ~ .gm-overlay { opacity: 1; }
.gm-check:checked ~ .gm-modal { opacity: 1; transform: scale(1); }

// 데모 루프: is-demo 는 열림·닫힘을 keyframes 로 반복 (체크박스 상태와 무관한 별도 경로)
@keyframes gm-overlay-loop {
  0%, 12%  { opacity: 0; }
  35%, 78% { opacity: 1; }
  100%     { opacity: 0; }
}
@keyframes gm-modal-loop {
  0%, 12%  { opacity: 0; transform: scale(.85); }
  35%, 78% { opacity: 1; transform: scale(1); }
  100%     { opacity: 0; transform: scale(.85); }
}
.gm-scene.is-demo .gm-overlay { animation: gm-overlay-loop $dur-loop $easing infinite; }
.gm-scene.is-demo .gm-modal { animation: gm-modal-loop $dur-loop $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .gm-overlay, .gm-modal { transition: none; }
  .gm-scene.is-demo .gm-overlay,
  .gm-scene.is-demo .gm-modal { 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);
}

.gm-scene {
  position: relative;
  box-sizing: border-box;
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: flex;
  justify-content: center;
  padding-top: 16px;
}

.gm-check {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.gm-trigger {
  position: relative;
  z-index: 0;
  align-self: flex-start;
  box-sizing: border-box;
  padding: 8px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff7e6;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  cursor: pointer;
}

.gm-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
  pointer-events: none;
}

.gm-modal {
  position: absolute;
  inset: 0;
  margin: auto;
  z-index: 2;
  box-sizing: border-box;
  width: min(210px, 74%);
  height: fit-content;
  padding: 20px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.38);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: #fff7e6;
  font: 600 12px/1.4 -apple-system, "Segoe UI", sans-serif;
  opacity: 0;
  transform: scale(0.85);
  transition: opacity 600ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
  pointer-events: none;
}

.gm-modal__title {
  font-size: 14px;
  font-weight: 700;
}

.gm-modal__desc {
  opacity: 0.8;
  font-weight: 500;
}

.gm-check:checked ~ .gm-overlay {
  opacity: 1;
}

.gm-check:checked ~ .gm-modal {
  opacity: 1;
  transform: scale(1);
}

@keyframes gm-overlay-loop {
  0%, 12% {
    opacity: 0;
  }
  35%, 78% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes gm-modal-loop {
  0%, 12% {
    opacity: 0;
    transform: scale(0.85);
  }
  35%, 78% {
    opacity: 1;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(0.85);
  }
}
.gm-scene.is-demo .gm-overlay {
  animation: gm-overlay-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.gm-scene.is-demo .gm-modal {
  animation: gm-modal-loop 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .gm-overlay, .gm-modal {
    transition: none;
  }
  .gm-scene.is-demo .gm-overlay,
  .gm-scene.is-demo .gm-modal {
    animation: none !important;
  }
}

// 체크박스가 진짜 열림·닫힘을 낸다. 실제로 누르면 데모 루프(.is-demo)만 뗀다.
document.querySelector('.gm-check').addEventListener('change', function () {
  document.querySelector('.gm-scene').classList.remove('is-demo');
});

import { CSSProperties, useState } from "react";
import styles from "./GlassModal.module.scss";

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

export interface GlassModalProps {
  duration?: string;
  easing?: string;
}

export default function GlassModal({
  duration = "600ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
}: GlassModalProps) {
  const [open, setOpen] = useState(false);
  const style: Vars = { "--duration": duration, "--easing": easing };

  return (
    <div className={styles.scene} style={style}>
      <button className={styles.trigger} type="button" onClick={() => setOpen(true)}>
        Delete item
      </button>
      <div
        className={`${styles.overlay} ${open ? styles.isOpen : ""}`}
        onClick={() => setOpen(false)}
      />
      <div className={`${styles.modal} ${open ? styles.isOpen : ""}`}>
        <span className={styles.title}>Delete this file?</span>
        <span className={styles.desc}>This can&apos;t be undone.</span>
      </div>
    </div>
  );
}