03Auto-responsive grid, no media query

<main class="stage">
  <ul class="gallery is-demo" aria-label="Photo gallery">
    <li class="tile" tabindex="0"></li>
    <li class="tile" tabindex="0"></li>
    <li class="tile" tabindex="0"></li>
    <li class="tile" tabindex="0"></li>
    <li class="tile" tabindex="0"></li>
    <li class="tile" tabindex="0"></li>
  </ul>
</main>

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

$duration: $dur-base;                                  // 타일이 자리를 잡는 시간
$easing: $ease-spring;
$color: $subject-cream;                                 // 타일 그러데이션

@include stage($stage-orange);
.stage { padding: clamp(8px, 2.4vw, 16px); }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(56px, 1fr));
  gap: $sp-2;
  list-style: none;
  margin: 0;
  padding: 0;
  width: 210px;
  max-width: 100%;
}
.tile {
  aspect-ratio: 1 / 1;
  border-radius: $r-sm;
  outline: none;
  cursor: pointer;
  box-shadow: $shadow-press;
  opacity: 1;
  transform: scale(1);
  transition: transform $duration $easing;
}
.tile:nth-child(odd)  { background: linear-gradient(160deg, $color 0%, $stage-orange 100%); }
.tile:nth-child(even) { background: linear-gradient(20deg, $stage-ink 0%, $color 100%); }

.tile:hover, .tile:focus-visible, .tile:active { transform: scale(1.08); }

.gallery.is-demo .tile { animation: enter-loop $dur-loop $easing infinite; }
.gallery.is-demo .tile:nth-child(2) { animation-delay: -0.2s; }
.gallery.is-demo .tile:nth-child(3) { animation-delay: -0.4s; }
.gallery.is-demo .tile:nth-child(4) { animation-delay: -0.6s; }
.gallery.is-demo .tile:nth-child(5) { animation-delay: -0.8s; }
.gallery.is-demo .tile:nth-child(6) { animation-delay: -1.0s; }

@keyframes enter-loop {
  0%        { opacity: .35; transform: scale(.88); }
  16%, 50%  { opacity: 1; transform: scale(1); }
  66%       { opacity: 1; transform: scale(1.08); }
  100%      { opacity: .35; transform: scale(.88); }
}

@media (hover: none) {
  .tile:active { transform: scale(1.08); }
}
@media (prefers-reduced-motion: reduce) {
  .tile { transition: none; opacity: 1; transform: scale(1); }
  .gallery.is-demo .tile { animation: 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);
}

.stage {
  padding: clamp(8px, 2.4vw, 16px);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(56px, 1fr));
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  width: 210px;
  max-width: 100%;
}

.tile {
  aspect-ratio: 1/1;
  border-radius: 8px;
  outline: none;
  cursor: pointer;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
  opacity: 1;
  transform: scale(1);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.tile:nth-child(odd) {
  background: linear-gradient(160deg, #fff7e6 0%, #ff4d1f 100%);
}

.tile:nth-child(even) {
  background: linear-gradient(20deg, #17141a 0%, #fff7e6 100%);
}

.tile:hover, .tile:focus-visible, .tile:active {
  transform: scale(1.08);
}

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

.gallery.is-demo .tile:nth-child(2) {
  animation-delay: -0.2s;
}

.gallery.is-demo .tile:nth-child(3) {
  animation-delay: -0.4s;
}

.gallery.is-demo .tile:nth-child(4) {
  animation-delay: -0.6s;
}

.gallery.is-demo .tile:nth-child(5) {
  animation-delay: -0.8s;
}

.gallery.is-demo .tile:nth-child(6) {
  animation-delay: -1s;
}

@keyframes enter-loop {
  0% {
    opacity: 0.35;
    transform: scale(0.88);
  }
  16%, 50% {
    opacity: 1;
    transform: scale(1);
  }
  66% {
    opacity: 1;
    transform: scale(1.08);
  }
  100% {
    opacity: 0.35;
    transform: scale(0.88);
  }
}
@media (hover: none) {
  .tile:active {
    transform: scale(1.08);
  }
}
@media (prefers-reduced-motion: reduce) {
  .tile {
    transition: none;
    opacity: 1;
    transform: scale(1);
  }
  .gallery.is-demo .tile {
    animation: none;
  }
}

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

export type AutoFitGalleryProps = {
  /** 타일 개수 (기본 6) */
  count?: number;
  /** 타일이 자리를 잡는 시간 (기본 300ms) */
  duration?: number;
  easing?: string;
  /** 타일 그러데이션 색 */
  color?: string;
};

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

/** grid-template-columns: repeat(auto-fit, minmax()) 한 줄로 미디어쿼리 없이 칸 수가 스스로 바뀐다 */
export default function AutoFitGallery({
  count = 6,
  duration = 300,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#fff7e6",
}: AutoFitGalleryProps) {
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  return (
    <ul className={styles.gallery} style={vars} aria-label="Photo gallery">
      {Array.from({ length: count }, (_, i) => (
        <li key={i} className={`${styles.tile} ${i % 2 ? styles.even : styles.odd}`} tabIndex={0} />
      ))}
    </ul>
  );
}