02Project grid

<main class="stage">
  <section class="pg is-demo">
    <div class="pg__tabs" role="tablist" aria-label="Project category">
      <span class="pg__indicator" aria-hidden="true"></span>
      <button class="pg__tab" type="button" role="tab" data-cat="all" aria-selected="true">All</button>
      <button class="pg__tab" type="button" role="tab" data-cat="web" aria-selected="false">Web</button>
      <button class="pg__tab" type="button" role="tab" data-cat="app" aria-selected="false">App</button>
      <button class="pg__tab" type="button" role="tab" data-cat="design" aria-selected="false">Design</button>
    </div>
    <div class="pg__grid">
      <article class="pg__card" data-cat="web"><span class="pg__thumb" aria-hidden="true"></span><p class="pg__title">Web Project A</p><p class="pg__tag">Web</p></article>
      <article class="pg__card" data-cat="app"><span class="pg__thumb" aria-hidden="true"></span><p class="pg__title">App Project B</p><p class="pg__tag">App</p></article>
      <article class="pg__card" data-cat="design"><span class="pg__thumb" aria-hidden="true"></span><p class="pg__title">Design Project C</p><p class="pg__tag">Design</p></article>
      <article class="pg__card" data-cat="web"><span class="pg__thumb" aria-hidden="true"></span><p class="pg__title">Web Project D</p><p class="pg__tag">Web</p></article>
    </div>
  </section>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: $dur-base;                             // 인디케이터·카드 필터 전환
$easing: $ease-spring;
$color: $subject-blue;                            // 인디케이터·활성 탭 색

@include stage($stage-yellow);

.pg { width: min(420px, 95vw); }

// ── 탭 + 인디케이터: 폭은 짐작하지 않고 클릭마다 getBoundingClientRect 로 실측(BD19) ──────────────
.pg__tabs {
  position: relative;
  display: flex;
  gap: $sp-1;
  margin: 0 0 $sp-2;
  padding: $sp-1;
  border-radius: $r-pill;
  background: rgba(23, 20, 26, .06);
  box-sizing: border-box;
}
.pg__indicator {
  position: absolute;
  left: $sp-1; top: $sp-1; bottom: $sp-1;
  border-radius: $r-pill;
  background: $subject-ink;
  transition: transform $duration $easing, width $duration $easing;
}
.pg__tab {
  position: relative;
  flex: 0 0 auto;
  padding: $sp-1 $sp-3;
  border: 0;
  background: none;
  border-radius: $r-pill;
  color: rgba($subject-ink, .72);                 // 옐로 면 위 5.70:1
  font-weight: 700; font-size: 11px; line-height: 1.6; font-family: inherit;
  cursor: pointer;
  transition: color $duration $easing;
}
.pg__tab[aria-selected="true"] { color: $subject-cream; }

.pg__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: $sp-1;
}
.pg__card {
  overflow: hidden;
  border-radius: $r-card;
  background: rgba(23, 20, 26, .04);
  padding: $sp-1;
  box-sizing: border-box;
  transition: opacity $duration $easing, transform $duration $easing;
}
.pg__card.is-hidden { opacity: .18; transform: scale(.94); }

.pg__thumb {
  position: relative;
  display: block;
  overflow: hidden;
  height: 30px;
  border-radius: $r-sm;
  margin: 0 0 $sp-1;
  background: rgba(23, 20, 26, .12);
}
// ── 썸네일 위 대각선 하이라이트가 계속 스치는 장식(항상 재생) ──────────────
.pg__thumb::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: -60%;
  width: 40%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .55), transparent);
  animation: pg-shimmer 2s linear infinite;
}
.pg__card:nth-child(2n) .pg__thumb::after { animation-delay: 400ms; }
@keyframes pg-shimmer {
  0%   { transform: translateX(0); }
  100% { transform: translateX(300%); }
}

.pg__title { margin: 0; font-weight: 700; font-size: 10px; line-height: 1.3; font-family: inherit; color: $subject-ink; }
.pg__tag { margin: $sp-1 0 0; font-weight: 600; font-size: 9px; line-height: 1; font-family: inherit; color: rgba($subject-ink, .72); } // 카드 면 위 5.85:1

// ── 반응형(BD9) ──────────────────────────────────────────
@media (max-width: 340px), (max-height: 220px) {
  .pg__tabs { margin-bottom: $sp-1; }
  .pg__tab { padding: 4px $sp-2; font-size: 10px; line-height: 1.2; }
  .pg__thumb { height: 26px; }
  .pg__grid { gap: $sp-1; }
}

// ── 접근성 ──────────────────────────────────────────
@media (prefers-reduced-motion: reduce) {
  .pg__indicator, .pg__tab, .pg__card { transition: none; }
  .pg__thumb::after { animation: none !important; }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.pg {
  width: min(420px, 95vw);
}

.pg__tabs {
  position: relative;
  display: flex;
  gap: 4px;
  margin: 0 0 8px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(23, 20, 26, 0.06);
  box-sizing: border-box;
}

.pg__indicator {
  position: absolute;
  left: 4px;
  top: 4px;
  bottom: 4px;
  border-radius: 999px;
  background: #17141a;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1), width 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pg__tab {
  position: relative;
  flex: 0 0 auto;
  padding: 4px 12px;
  border: 0;
  background: none;
  border-radius: 999px;
  color: rgba(23, 20, 26, 0.72);
  font-weight: 700;
  font-size: 11px;
  line-height: 1.6;
  font-family: inherit;
  cursor: pointer;
  transition: color 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pg__tab[aria-selected=true] {
  color: #fff7e6;
}

.pg__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

.pg__card {
  overflow: hidden;
  border-radius: 16px;
  background: rgba(23, 20, 26, 0.04);
  padding: 4px;
  box-sizing: border-box;
  transition: opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.pg__card.is-hidden {
  opacity: 0.18;
  transform: scale(0.94);
}

.pg__thumb {
  position: relative;
  display: block;
  overflow: hidden;
  height: 30px;
  border-radius: 8px;
  margin: 0 0 4px;
  background: rgba(23, 20, 26, 0.12);
}

.pg__thumb::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -60%;
  width: 40%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.55), transparent);
  animation: pg-shimmer 2s linear infinite;
}

.pg__card:nth-child(2n) .pg__thumb::after {
  animation-delay: 400ms;
}

@keyframes pg-shimmer {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(300%);
  }
}
.pg__title {
  margin: 0;
  font-weight: 700;
  font-size: 10px;
  line-height: 1.3;
  font-family: inherit;
  color: #17141a;
}

.pg__tag {
  margin: 4px 0 0;
  font-weight: 600;
  font-size: 9px;
  line-height: 1;
  font-family: inherit;
  color: rgba(23, 20, 26, 0.72);
}

@media (max-width: 340px), (max-height: 220px) {
  .pg__tabs {
    margin-bottom: 4px;
  }
  .pg__tab {
    padding: 4px 8px;
    font-size: 10px;
    line-height: 1.2;
  }
  .pg__thumb {
    height: 26px;
  }
  .pg__grid {
    gap: 4px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .pg__indicator, .pg__tab, .pg__card {
    transition: none;
  }
  .pg__thumb::after {
    animation: none !important;
  }
}

// 실제 동작: 탭을 클릭하면 인디케이터가 실제 탭 폭·위치(getBoundingClientRect)로 이동하고, 그 분류가 아닌 카드는 실제로 흐려진다.
var root = document.querySelector('.pg');
var tabs = root.querySelectorAll('.pg__tab');
var indicator = root.querySelector('.pg__indicator');
var cards = root.querySelectorAll('.pg__card');

function moveIndicator(tab) {
  var wrapBox = tab.parentElement.getBoundingClientRect();
  var box = tab.getBoundingClientRect();
  indicator.style.width = box.width + 'px';
  indicator.style.transform = 'translateX(' + (box.left - wrapBox.left) + 'px)';
}

tabs.forEach(function (tab) {
  tab.addEventListener('click', function () {
    root.classList.remove('is-demo');
    tabs.forEach(function (t) { t.setAttribute('aria-selected', 'false'); });
    tab.setAttribute('aria-selected', 'true');
    moveIndicator(tab);
    var cat = tab.getAttribute('data-cat');
    cards.forEach(function (card) {
      var show = cat === 'all' || card.getAttribute('data-cat') === cat;
      card.classList.toggle('is-hidden', !show);
    });
  });
});
moveIndicator(tabs[0]);
window.addEventListener('resize', function () {
  var activeTab = root.querySelector('.pg__tab[aria-selected="true"]');
  if (activeTab) moveIndicator(activeTab);
});

import { useEffect, useRef, useState } from "react";
import type { CSSProperties } from "react";
import styles from "./ProjectGrid.module.scss";

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

const TABS = [
  { cat: "all", label: "전체" },
  { cat: "web", label: "웹" },
  { cat: "app", label: "앱" },
  { cat: "design", label: "디자인" },
];
const CARDS = [
  { cat: "web", title: "웹 프로젝트 A", tag: "Web" },
  { cat: "app", title: "앱 프로젝트 B", tag: "App" },
  { cat: "design", title: "디자인 프로젝트 C", tag: "Design" },
  { cat: "web", title: "웹 프로젝트 D", tag: "Web" },
];

export default function ProjectGrid({ duration = 300, easing = "cubic-bezier(.2,.8,.2,1)", color = "#2f6df6" }: ProjectGridProps) {
  const [active, setActive] = useState("all");
  const [indicator, setIndicator] = useState<{ left: number; width: number } | null>(null);
  const wrapRef = useRef<HTMLDivElement>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  // 실제 동작: 탭을 클릭하면 인디케이터가 실제 탭 폭·위치(getBoundingClientRect)로 이동한다(BD19 — 값을 짐작하지 않는다).
  function moveIndicator(el: HTMLButtonElement) {
    const wrap = wrapRef.current;
    if (!wrap) return;
    const wrapBox = wrap.getBoundingClientRect();
    const box = el.getBoundingClientRect();
    setIndicator({ left: box.left - wrapBox.left, width: box.width });
  }

  useEffect(() => {
    const first = wrapRef.current?.querySelector<HTMLButtonElement>('[aria-selected="true"]');
    if (first) moveIndicator(first);
  }, []);

  return (
    <section className={styles.pg} style={vars}>
      <div className={styles.tabs} role="tablist" aria-label="프로젝트 분류" ref={wrapRef}>
        {indicator && (
          <span className={styles.indicator} style={{ transform: `translateX(${indicator.left}px)`, width: indicator.width }} aria-hidden="true" />
        )}
        {TABS.map((t) => (
          <button
            key={t.cat}
            type="button"
            role="tab"
            className={styles.tab}
            aria-selected={active === t.cat}
            onClick={(e: any) => { setActive(t.cat); moveIndicator(e.currentTarget); }}
          >
            {t.label}
          </button>
        ))}
      </div>
      <div className={styles.grid}>
        {CARDS.map((c, i) => (
          <article key={i} className={`${styles.card} ${active !== "all" && active !== c.cat ? styles.hidden : ""}`}>
            <span className={styles.thumb} aria-hidden="true" />
            <p className={styles.title}>{c.title}</p>
            <p className={styles.tag}>{c.tag}</p>
          </article>
        ))}
      </div>
    </section>
  );
}