05Tile lộ dần lớp gradient

<main class="stage">
  <div class="gr-grid is-demo">
    <div class="gr-tile gr-tile--a gr-focal">
      <span class="gr-tile__scrim"></span>
      <span class="gr-tile__label">City lights</span>
    </div>
    <div class="gr-tile gr-tile--b">
      <span class="gr-tile__tag">Trending</span>
    </div>
    <div class="gr-tile gr-tile--c">
      <span class="gr-tile__tag">New</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 350ms;
$easing: $ease-out;
$color: $subject-blue;

@include stage($stage-ink);

.gr-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: $sp-2;
}

.gr-tile {
  border-radius: $r-sm;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
}

.gr-tile--a { grid-row: 1 / 3; background: linear-gradient(160deg, $color, rgba(255, 255, 255, .2)); }
.gr-tile--b, .gr-tile--c { background: rgba(255, 255, 255, .08); }
.gr-tile__tag { opacity: .8; }

// 평소엔 사진만: 스크림은 opacity 0, 제목은 아래로 8px 밀려 있다
.gr-tile__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, .75), transparent 65%);
  opacity: 0;
  transition: opacity $duration $easing;
}
.gr-tile__label {
  position: relative;
  z-index: 1;
  transform: translateY($sp-2);
  transition: transform $duration $easing;
}

// 실사용: 진짜 마우스 호버
.gr-focal:hover .gr-tile__scrim { opacity: 1; }
.gr-focal:hover .gr-tile__label { transform: translateY(0); }

// 데모 루프: is-demo 는 같은 등장을 keyframes 로 무한 재생 (캡처용)
@keyframes gr-scrim-in { 0%, 100% { opacity: 0; } 50% { opacity: 1; } }
@keyframes gr-label-up { 0%, 100% { transform: translateY($sp-2); } 50% { transform: translateY(0); } }
.gr-grid.is-demo .gr-focal .gr-tile__scrim { animation: gr-scrim-in $duration $easing infinite; }
.gr-grid.is-demo .gr-focal .gr-tile__label { animation: gr-label-up $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .gr-focal:hover .gr-tile__scrim, .gr-focal:hover .gr-tile__label,
  .gr-grid.is-demo .gr-focal .gr-tile__scrim, .gr-grid.is-demo .gr-focal .gr-tile__label {
    animation: none !important; transition: 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);
}

.gr-grid {
  width: min(340px, 90vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.gr-tile {
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  position: relative;
  overflow: hidden;
}

.gr-tile--a {
  grid-row: 1/3;
  background: linear-gradient(160deg, #2f6df6, rgba(255, 255, 255, 0.2));
}

.gr-tile--b, .gr-tile--c {
  background: rgba(255, 255, 255, 0.08);
}

.gr-tile__tag {
  opacity: 0.8;
}

.gr-tile__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.75), transparent 65%);
  opacity: 0;
  transition: opacity 350ms ease-out;
}

.gr-tile__label {
  position: relative;
  z-index: 1;
  transform: translateY(8px);
  transition: transform 350ms ease-out;
}

.gr-focal:hover .gr-tile__scrim {
  opacity: 1;
}

.gr-focal:hover .gr-tile__label {
  transform: translateY(0);
}

@keyframes gr-scrim-in {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}
@keyframes gr-label-up {
  0%, 100% {
    transform: translateY(8px);
  }
  50% {
    transform: translateY(0);
  }
}
.gr-grid.is-demo .gr-focal .gr-tile__scrim {
  animation: gr-scrim-in 350ms ease-out infinite;
}

.gr-grid.is-demo .gr-focal .gr-tile__label {
  animation: gr-label-up 350ms ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .gr-focal:hover .gr-tile__scrim, .gr-focal:hover .gr-tile__label,
  .gr-grid.is-demo .gr-focal .gr-tile__scrim, .gr-grid.is-demo .gr-focal .gr-tile__label {
    animation: none !important;
    transition: none !important;
  }
}

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

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

export interface GradientRevealTileProps {
  duration?: string;
  easing?: string;
  color?: string;
}

export default function GradientRevealTile({
  duration = "350ms",
  easing = "ease-out",
  color = "#2f6df6",
}: GradientRevealTileProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--color": color,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.tileA} ${styles.focal}`}>
        <span className={styles.scrim} />
        <span className={styles.label}>City lights</span>
      </div>
      <div className={`${styles.tile} ${styles.tileB}`}>
        <span className={styles.tag}>Trending</span>
      </div>
      <div className={`${styles.tile} ${styles.tileC}`}>
        <span className={styles.tag}>New</span>
      </div>
    </div>
  );
}