07Grid span expand on hover

<main class="stage">
  <div class="he-grid is-demo">
    <div class="he-tile he-focal">
      <span class="he-tile__tag">Live</span>
      <span class="he-tile__num">128</span>
    </div>
    <div class="he-tile">
      <span class="he-tile__tag">Users</span>
    </div>
    <div class="he-tile">
      <span class="he-tile__tag">Sessions</span>
    </div>
    <div class="he-tile">
      <span class="he-tile__tag">Errors</span>
    </div>
  </div>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-enter;
$easing: $ease-spring;
$scale: 1.35;

@include stage($stage-orange);

.he-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340 / 190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: $sp-2;
}

.he-tile {
  border-radius: $r-sm;
  padding: $sp-3;
  box-sizing: border-box;
  color: $subject-cream;
  background: rgba(23, 20, 26, .55);
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  transform-origin: top left; // 규칙8: 그리드 좌상단 칸 안쪽 확장
}

.he-focal { background: $subject-ink; }
.he-tile__tag { opacity: .8; }
.he-tile__num { font-size: 24px; font-weight: 700; margin-top: $sp-1; }

// grid-column/row 의 span 값 자체는 트랜지션이 걸리지 않는다(이산값이라 중간 프레임이 없다) —
// 그래서 실제 칸 배치는 그대로 두고 transform: scale + z-index 로 옆 칸을 덮어 "확장"을 흉내 낸다
.he-focal {
  transition: transform $duration $easing, box-shadow $duration $easing;
  box-shadow: $shadow-press;
}
.he-focal:hover {
  transform: scale($scale);
  box-shadow: $shadow-raised;
  z-index: 5;
}

@keyframes he-expand {
  0%, 100% { transform: scale(1); box-shadow: $shadow-press; z-index: 1; }
  50% { transform: scale($scale); box-shadow: $shadow-raised; z-index: 5; }
}
.he-grid.is-demo .he-focal { animation: he-expand $duration $easing infinite; }

@media (prefers-reduced-motion: reduce) {
  .he-focal:hover,
  .he-grid.is-demo .he-focal { animation: none !important; transform: none !important; box-shadow: $shadow-press !important; z-index: 1 !important; }
}

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);
}

.he-grid {
  width: min(320px, 88vw);
  aspect-ratio: 340/190;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 8px;
}

.he-tile {
  border-radius: 8px;
  padding: 12px;
  box-sizing: border-box;
  color: #fff7e6;
  background: rgba(23, 20, 26, 0.55);
  font: 600 12px/1 -apple-system, "Segoe UI", sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  transform-origin: top left;
}

.he-focal {
  background: #17141a;
}

.he-tile__tag {
  opacity: 0.8;
}

.he-tile__num {
  font-size: 24px;
  font-weight: 700;
  margin-top: 4px;
}

.he-focal {
  transition: transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.he-focal:hover {
  transform: scale(1.35);
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  z-index: 5;
}

@keyframes he-expand {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
    z-index: 1;
  }
  50% {
    transform: scale(1.35);
    box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
    z-index: 5;
  }
}
.he-grid.is-demo .he-focal {
  animation: he-expand 600ms cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .he-focal:hover,
  .he-grid.is-demo .he-focal {
    animation: none !important;
    transform: none !important;
    box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32) !important;
    z-index: 1 !important;
  }
}

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

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

export interface HoverExpandSpanProps {
  duration?: string;
  easing?: string;
  scale?: number;
}

// grid-column/row 의 span 값은 트랜지션이 걸리지 않아 transform: scale + z-index 로 확장을 흉내 낸다
export default function HoverExpandSpan({
  duration = "600ms",
  easing = "cubic-bezier(.2, .8, .2, 1)",
  scale = 1.35,
}: HoverExpandSpanProps) {
  const style: Vars = {
    "--duration": duration,
    "--easing": easing,
    "--scale": scale,
  };
  return (
    <div className={styles.grid} style={style}>
      <div className={`${styles.tile} ${styles.focal}`}>
        <span className={styles.tag}>Live</span>
        <span className={styles.num}>128</span>
      </div>
      <div className={styles.tile}>
        <span className={styles.tag}>Users</span>
      </div>
      <div className={styles.tile}>
        <span className={styles.tag}>Sessions</span>
      </div>
      <div className={styles.tile}>
        <span className={styles.tag}>Errors</span>
      </div>
    </div>
  );
}