03Shadow-detach cards

<main class="stage">
  <div class="grid">
    <div class="card is-demo">
      <div class="card__body">
        <span class="card__icon" aria-hidden="true"></span>
        <p class="card__label">Fast search</p>
      </div>
    </div>
    <div class="card is-demo">
      <div class="card__body">
        <span class="card__icon" aria-hidden="true"></span>
        <p class="card__label">Auto-organize</p>
      </div>
    </div>
    <div class="card is-demo">
      <div class="card__body">
        <span class="card__icon" aria-hidden="true"></span>
        <p class="card__label">Team chat</p>
      </div>
    </div>
    <div class="card is-demo">
      <div class="card__body">
        <span class="card__icon" aria-hidden="true"></span>
        <p class="card__label">Reports</p>
      </div>
    </div>
  </div>
</main>

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

$duration: $dur-loop;       // 몸통이 그림자에서 멀어졌다 돌아오는 주기
$easing: $ease-spring;
$color: $subject-blue;      // 아이콘 스와치 색

$border: 3px;

@include stage($stage-orange);

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: $sp-3;
  width: clamp(260px, 88vw, 420px);
}
.card {
  position: relative;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: $subject-ink;
  transform: translate($sp-2, $sp-2);
}
.card__body {
  box-sizing: border-box;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: $sp-2;
  padding: $sp-3;
  border: $border solid $subject-ink;
  border-radius: 0;
  background: $subject-cream;
  animation: floatAway $duration $easing infinite;
}
.card:nth-child(1) .card__body { animation-delay: 0s; }
.card:nth-child(2) .card__body { animation-delay: -.5s; }
.card:nth-child(3) .card__body { animation-delay: -1s; }
.card:nth-child(4) .card__body { animation-delay: -1.5s; }
.card__icon {
  display: block;
  width: clamp(18px, 5vw, 24px);
  height: clamp(18px, 5vw, 24px);
  background: $color;
  border-radius: 0;
}
.card__label {
  margin: 0;
  color: $subject-ink;
  font-weight: 700;
  font-size: clamp(11px, 2.6vw, 13px);
  line-height: 1.3;
}

// 데모: 그림자(::before)는 고정, 몸통(card__body)만 왼쪽 위로 떴다 돌아와 틈이 늘었다 줄었다 한다
@keyframes floatAway {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(-$sp-2, -$sp-2); }
}

@media (prefers-reduced-motion: reduce) {
  .card__body {
    animation: none !important;
    transform: none;
  }
}

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);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: clamp(260px, 88vw, 420px);
}

.card {
  position: relative;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: #17141a;
  transform: translate(8px, 8px);
}

.card__body {
  box-sizing: border-box;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 3px solid #17141a;
  border-radius: 0;
  background: #fff7e6;
  animation: floatAway 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.card:nth-child(1) .card__body {
  animation-delay: 0s;
}

.card:nth-child(2) .card__body {
  animation-delay: -0.5s;
}

.card:nth-child(3) .card__body {
  animation-delay: -1s;
}

.card:nth-child(4) .card__body {
  animation-delay: -1.5s;
}

.card__icon {
  display: block;
  width: clamp(18px, 5vw, 24px);
  height: clamp(18px, 5vw, 24px);
  background: #2f6df6;
  border-radius: 0;
}

.card__label {
  margin: 0;
  color: #17141a;
  font-weight: 700;
  font-size: clamp(11px, 2.6vw, 13px);
  line-height: 1.3;
}

@keyframes floatAway {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(-8px, -8px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .card__body {
    animation: none !important;
    transform: none;
  }
}

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

export type GridCard = { label: string };

export type CardGridBrutalistProps = {
  cards?: GridCard[];
  duration?: number;
  easing?: string;
  color?: string;
};

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

const DELAYS = ["0s", "-.5s", "-1s", "-1.5s"];

export default function CardGridBrutalist({
  cards = [
    { label: "빠른 검색" },
    { label: "자동 정리" },
    { label: "팀 채팅" },
    { label: "리포트" },
  ],
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#2f6df6",
}: CardGridBrutalistProps) {
  const base: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  return (
    <div className={styles.grid} style={base}>
      {cards.map((c, i) => {
        const vars: Vars = { ...base, "--delay": DELAYS[i % DELAYS.length] };
        return (
          <div key={c.label} className={styles.card}>
            <div className={styles.body} style={vars}>
              <span className={styles.icon} aria-hidden="true" />
              <p className={styles.label}>{c.label}</p>
            </div>
          </div>
        );
      })}
    </div>
  );
}