03Caption trượt lên

<main class="stage">
  <figure class="photo is-demo" tabindex="0">
    <span class="photo__pic" aria-hidden="true">
      <span class="photo__sun"></span>
      <span class="photo__hill"></span>
    </span>
    <figcaption class="photo__cap">
      <strong class="photo__cap-title">Hướng dẫn pha cà phê</strong>
      <span class="photo__cap-desc">Đọc trong 5 phút</span>
    </figcaption>
  </figure>
</main>

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

$duration: $dur-base;                               // 캡션이 올라오는 시간
$easing: $ease-out;
$color: $subject-cream;                              // 캡션 배경 색

@include stage($stage-orange);
.stage { padding: clamp(6px, 2.4vw, 16px); }   // 320px 대응: 데모 카드가 작아 여백도 줄인다

.photo {
  margin: 0;
  position: relative;
  width: min(160px, 50vw);
  border-radius: $r-card;
  overflow: hidden;                                  // 캡션이 밖으로 안 나가게
  box-shadow: $shadow-raised;
  outline: none;
  cursor: pointer;
}
.photo__pic {
  display: block;
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(155deg, $subject-blue 0%, $subject-ink 100%);
}
.photo__sun {
  position: absolute;
  top: 14%;
  right: 16%;
  width: 18%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: $subject-cream;
}
.photo__hill {
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -10%;
  height: 46%;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  background: $stage-orange;
  opacity: .55;
}
.photo__cap {
  word-break: keep-all;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  background: $color;
  transform: translateY(100%);                        // 아래로 숨겨 둔다
  transition: transform $duration $easing;
}
.photo__cap-title {
  word-break: keep-all;
  font-weight: 700; font-size: clamp(12px, 3.4vw, 14px); line-height: 1.3; font-family: inherit;
  color: $stage-ink;
}
.photo__cap-desc {
  word-break: keep-all;
  font-weight: 500; font-size: clamp(10px, 2.8vw, 12px); line-height: 1.3; font-family: inherit;
  color: $stage-ink;
}

.photo:hover .photo__cap,
.photo:focus-visible .photo__cap,
.photo:active .photo__cap {
  word-break: keep-all;
  transform: translateY(0);
}

.photo.is-demo .photo__cap {
  word-break: keep-all;
  animation: slide-loop $dur-loop $easing infinite;
}

@keyframes slide-loop {
  0%, 20%  { transform: translateY(100%); }
  50%, 75% { transform: translateY(0); }
  100%     { transform: translateY(100%); }
}

// 터치: 캡션은 콘텐츠라 hover 가 없는 기기에선 기본으로 보이게 한다
@media (hover: none) {
  .photo__cap {
  word-break: keep-all; transform: translateY(0); }
  .photo.is-demo .photo__cap {
  word-break: keep-all; animation: none; }
}

@media (prefers-reduced-motion: reduce) {
  .photo__cap {
  word-break: keep-all; transition: none; }
  .photo.is-demo .photo__cap {
  word-break: keep-all; animation: none; transform: translateY(0); }
}

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);
}

.stage {
  padding: clamp(6px, 2.4vw, 16px);
}

.photo {
  margin: 0;
  position: relative;
  width: min(160px, 50vw);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  outline: none;
  cursor: pointer;
}

.photo__pic {
  display: block;
  position: relative;
  aspect-ratio: 4/3;
  background: linear-gradient(155deg, #2f6df6 0%, #17141a 100%);
}

.photo__sun {
  position: absolute;
  top: 14%;
  right: 16%;
  width: 18%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #fff7e6;
}

.photo__hill {
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -10%;
  height: 46%;
  border-radius: 50% 50% 0 0/100% 100% 0 0;
  background: #ff4d1f;
  opacity: 0.55;
}

.photo__cap {
  word-break: keep-all;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  background: #fff7e6;
  transform: translateY(100%);
  transition: transform 300ms ease-out;
}

.photo__cap-title {
  word-break: keep-all;
  font-weight: 700;
  font-size: clamp(12px, 3.4vw, 14px);
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.photo__cap-desc {
  word-break: keep-all;
  font-weight: 500;
  font-size: clamp(10px, 2.8vw, 12px);
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.photo:hover .photo__cap,
.photo:focus-visible .photo__cap,
.photo:active .photo__cap {
  word-break: keep-all;
  transform: translateY(0);
}

.photo.is-demo .photo__cap {
  word-break: keep-all;
  animation: slide-loop 2s ease-out infinite;
}

@keyframes slide-loop {
  0%, 20% {
    transform: translateY(100%);
  }
  50%, 75% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(100%);
  }
}
@media (hover: none) {
  .photo__cap {
    word-break: keep-all;
    transform: translateY(0);
  }
  .photo.is-demo .photo__cap {
    word-break: keep-all;
    animation: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  .photo__cap {
    word-break: keep-all;
    transition: none;
  }
  .photo.is-demo .photo__cap {
    word-break: keep-all;
    animation: none;
    transform: translateY(0);
  }
}

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

export type CaptionSlidePhotoProps = {
  title: string;
  desc: string;
  /** 캡션이 올라오는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  /** 캡션 배경 색 */
  color?: string;
};

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

export default function CaptionSlidePhoto({
  title,
  desc,
  duration = 300,
  easing = "ease-out",
  color = "#fff7e6",
}: CaptionSlidePhotoProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <figure className={styles.photo} style={vars} tabIndex={0}>
      <span className={styles.pic} aria-hidden="true">
        <span className={styles.sun} />
        <span className={styles.hill} />
      </span>
      <figcaption className={styles.cap}>
        <strong className={styles.title}>{title}</strong>
        <span className={styles.desc}>{desc}</span>
      </figcaption>
    </figure>
  );
}