07Nút mở rộng toàn màn hình

<main class="stage is-demo">
  <button class="thumb" type="button" aria-label="Xem ảnh cỡ lớn">
    <span class="thumb__caption">Golden Retriever · 2026</span>
    <span class="thumb__close" aria-hidden="true">×</span>
  </button>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-enter;     // 커지는 시간
$easing: $ease-spring;
$color: $subject-cream;    // 강조색(캡션·닫기)

@include stage($stage-orange);

// 실제로는 width/height 를 바꾸지 않는다. inset:0 인 상자를 transform: scale 로만 줄여
// "작은 썸네일" 처럼 보이게 한다 — 커질 때도 레이아웃 재계산이 없다
.thumb {
  position: fixed; inset: 0; margin: 0; padding: 0; border: 0;
  border-radius: $r-card; overflow: hidden; cursor: pointer;
  background: linear-gradient(160deg, $subject-cream, $stage-paper);
  box-shadow: $shadow-raised;
  transform: translate(-30%, 20%) scale(.3);
  transform-origin: 20% 75%; // 규칙8: 썸네일 자리 앵커 확대
  transition: transform $duration $easing, border-radius $duration $easing;
  -webkit-tap-highlight-color: transparent;
}

.thumb__caption {
  position: absolute; left: clamp(10px, 3vmin, 16px); bottom: clamp(10px, 3vmin, 16px);
  font-weight: 600;
  font-size: clamp(11px, 3.4vmin, 14px);
  line-height: 1;
  font-family: inherit;
  color: $stage-ink;
  opacity: 0; transition: opacity $duration $easing;
}

.thumb__close {
  position: absolute; right: clamp(10px, 3vmin, 16px); top: clamp(10px, 3vmin, 16px);
  width: clamp(20px, 6vmin, 26px); height: clamp(20px, 6vmin, 26px);
  display: grid; place-items: center; border-radius: 50%;
  background: rgba($stage-ink, .55); color: $color; font-size: clamp(13px, 3.8vmin, 16px);
  opacity: 0; transition: opacity $duration $easing;
}

.stage.is-open .thumb {
  transform: translate(0, 0) scale(1);
  border-radius: 0;
}
.stage.is-open .thumb__caption,
.stage.is-open .thumb__close { opacity: 1; }

.stage.is-demo .thumb { animation: thumb-loop $dur-loop $easing infinite; }
.stage.is-demo .thumb__caption,
.stage.is-demo .thumb__close { animation: fade-loop $dur-loop ease-in-out infinite; }

@keyframes thumb-loop {
  0%   { transform: translate(-30%, 20%) scale(.3); border-radius: $r-card; }
  20%  { transform: translate(0, 0) scale(1);       border-radius: 0; }
  65%  { transform: translate(0, 0) scale(1);        border-radius: 0; }
  85%  { transform: translate(-30%, 20%) scale(.3);  border-radius: $r-card; }
  100% { transform: translate(-30%, 20%) scale(.3);  border-radius: $r-card; }
}
@keyframes fade-loop {
  0%   { opacity: 0; }
  20%  { opacity: 1; }
  65%  { opacity: 1; }
  85%  { opacity: 0; }
  100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .thumb,
  .stage.is-demo .thumb__caption,
  .stage.is-demo .thumb__close { animation: none; }
  .thumb, .thumb__caption, .thumb__close { transition-duration: 1ms; }
}

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);
}

.thumb {
  position: fixed;
  inset: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  background: linear-gradient(160deg, #fff7e6, #ffffff);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  transform: translate(-30%, 20%) scale(0.3);
  transform-origin: 20% 75%;
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1), border-radius 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
  -webkit-tap-highlight-color: transparent;
}

.thumb__caption {
  position: absolute;
  left: clamp(10px, 3vmin, 16px);
  bottom: clamp(10px, 3vmin, 16px);
  font-weight: 600;
  font-size: clamp(11px, 3.4vmin, 14px);
  line-height: 1;
  font-family: inherit;
  color: #17141a;
  opacity: 0;
  transition: opacity 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.thumb__close {
  position: absolute;
  right: clamp(10px, 3vmin, 16px);
  top: clamp(10px, 3vmin, 16px);
  width: clamp(20px, 6vmin, 26px);
  height: clamp(20px, 6vmin, 26px);
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.55);
  color: #fff7e6;
  font-size: clamp(13px, 3.8vmin, 16px);
  opacity: 0;
  transition: opacity 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.stage.is-open .thumb {
  transform: translate(0, 0) scale(1);
  border-radius: 0;
}

.stage.is-open .thumb__caption,
.stage.is-open .thumb__close {
  opacity: 1;
}

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

.stage.is-demo .thumb__caption,
.stage.is-demo .thumb__close {
  animation: fade-loop 2s ease-in-out infinite;
}

@keyframes thumb-loop {
  0% {
    transform: translate(-30%, 20%) scale(0.3);
    border-radius: 16px;
  }
  20% {
    transform: translate(0, 0) scale(1);
    border-radius: 0;
  }
  65% {
    transform: translate(0, 0) scale(1);
    border-radius: 0;
  }
  85% {
    transform: translate(-30%, 20%) scale(0.3);
    border-radius: 16px;
  }
  100% {
    transform: translate(-30%, 20%) scale(0.3);
    border-radius: 16px;
  }
}
@keyframes fade-loop {
  0% {
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  65% {
    opacity: 1;
  }
  85% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .stage.is-demo .thumb,
  .stage.is-demo .thumb__caption,
  .stage.is-demo .thumb__close {
    animation: none;
  }
  .thumb, .thumb__caption, .thumb__close {
    transition-duration: 1ms;
  }
}

(function () {
  var stage = document.querySelector('.stage');
  var thumb = document.querySelector('.thumb');
  var isOpen = false;
  thumb.addEventListener('click', function () {
    stage.classList.remove('is-demo');
    isOpen = !isOpen;
    stage.classList.toggle('is-open', isOpen);
  });
  document.addEventListener('keydown', function (e) {
    if (e.key === 'Escape' && isOpen) { isOpen = false; stage.classList.remove('is-open'); }
  });
})();

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

export type FullscreenTakeoverProps = {
  caption: string;
  /** 커지는 시간 (기본 600ms) */
  duration?: number;
  easing?: string;
  color?: string;
};

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

export default function FullscreenTakeover({
  caption,
  duration = 600,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#fff7e6",
}: FullscreenTakeoverProps) {
  const [open, setOpen] = useState(false);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.stage} style={vars}>
      <button
        type="button"
        className={open ? `${styles.thumb} ${styles.isOpen}` : styles.thumb}
        aria-label={caption}
        onClick={() => setOpen((v) => !v)}
      >
        <span className={styles.caption}>{caption}</span>
        <span className={styles.close} aria-hidden="true">×</span>
      </button>
    </div>
  );
}