04Skills stack

<main class="stage">
  <section class="sk" aria-label="Tech stack">
    <p class="sk__label">SKILLS</p>
    <div class="sk__viewport">
      <div class="sk__track">
        <span class="sk__chip sk__chip--1" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--2" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--3" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--4" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--1" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--2" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--3" aria-hidden="true"></span>
        <span class="sk__chip sk__chip--4" aria-hidden="true"></span>
      </div>
    </div>
    <button class="sk__pause" type="button" aria-pressed="false">Pause flow</button>
  </section>
</main>

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

// ── 변수 3개 ──────────────────────────────────────────
$duration: 13s;                                      // 트랙 한 바퀴 시간 (근접값 아님 — 마퀴 전용 값)
$easing: linear;
$color: $subject-ink;                                 // 칩 마크 색

@include stage($stage-paper);

.sk { width: min(440px, 96vw); text-align: center; }
.sk__label {
  margin: 0 0 $sp-3;
  font-weight: 700; font-size: 10px; line-height: 1; font-family: inherit;
  letter-spacing: .16em;
  color: rgba($subject-ink, .72);                 // 흰 면 위 7.26:1
}

.sk__viewport {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

// 트랙: gap 을 쓰지 않는다(BD15) — 항목마다 margin-right 로 간격을 준다
.sk__track {
  display: flex;
  width: max-content;
  animation: sk-scroll $duration $easing infinite;
}
.sk.is-paused .sk__track,
.sk__viewport:hover .sk__track { animation-play-state: paused; }

@keyframes sk-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

.sk__chip {
  flex: 0 0 auto;
  width: 68px; height: 32px;
  margin-right: $sp-5;
  border-radius: $r-sm;
  background: rgba(23, 20, 26, .06);
  display: flex; align-items: center; justify-content: center;
  gap: $sp-1;
}
.sk__chip::before {
  content: "";
  width: 12px; height: 12px;
  background: $color;
}
.sk__chip::after {
  content: "";
  width: 24px; height: 6px;
  border-radius: $r-xs;
  background: rgba(23, 20, 26, .28);
}
.sk__chip--1::before { border-radius: 50%; }
.sk__chip--2::before { border-radius: $r-xs; transform: rotate(45deg); }
.sk__chip--3::before { clip-path: polygon(50% 0%, 0% 100%, 100% 100%); border-radius: 0; }
.sk__chip--4::before { border-radius: $r-pill; width: 16px; background: $subject-blue; }

.sk__pause {
  margin-top: $sp-3;
  padding: $sp-1 $sp-3;
  border-radius: $r-pill;
  border: 1px solid rgba(23, 20, 26, .18);
  background: none;
  color: rgba(23, 20, 26, .6);
  font-weight: 600; font-size: 10px; line-height: 1.6; font-family: inherit;
  cursor: pointer;
}
.sk__pause[aria-pressed="true"] { background: rgba(23, 20, 26, .08); color: $subject-ink; }

// ── 접근성 ──────────────────────────────────────────
@media (prefers-reduced-motion: reduce) {
  .sk__track { animation: none !important; transform: translateX(0); }
}

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

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

.sk {
  width: min(440px, 96vw);
  text-align: center;
}

.sk__label {
  margin: 0 0 12px;
  font-weight: 700;
  font-size: 10px;
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.16em;
  color: rgba(23, 20, 26, 0.72);
}

.sk__viewport {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.sk__track {
  display: flex;
  width: max-content;
  animation: sk-scroll 13s linear infinite;
}

.sk.is-paused .sk__track,
.sk__viewport:hover .sk__track {
  animation-play-state: paused;
}

@keyframes sk-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}
.sk__chip {
  flex: 0 0 auto;
  width: 68px;
  height: 32px;
  margin-right: 20px;
  border-radius: 8px;
  background: rgba(23, 20, 26, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.sk__chip::before {
  content: "";
  width: 12px;
  height: 12px;
  background: #17141a;
}

.sk__chip::after {
  content: "";
  width: 24px;
  height: 6px;
  border-radius: 4px;
  background: rgba(23, 20, 26, 0.28);
}

.sk__chip--1::before {
  border-radius: 50%;
}

.sk__chip--2::before {
  border-radius: 4px;
  transform: rotate(45deg);
}

.sk__chip--3::before {
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
  border-radius: 0;
}

.sk__chip--4::before {
  border-radius: 999px;
  width: 16px;
  background: #2f6df6;
}

.sk__pause {
  margin-top: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(23, 20, 26, 0.18);
  background: none;
  color: rgba(23, 20, 26, 0.6);
  font-weight: 600;
  font-size: 10px;
  line-height: 1.6;
  font-family: inherit;
  cursor: pointer;
}

.sk__pause[aria-pressed=true] {
  background: rgba(23, 20, 26, 0.08);
  color: #17141a;
}

@media (prefers-reduced-motion: reduce) {
  .sk__track {
    animation: none !important;
    transform: translateX(0);
  }
}

// 실제 동작: 버튼을 누르거나 마우스를 올리면 흐름이 실제로 멈춘다(터치 기기는 버튼으로).
var root = document.querySelector('.sk');
var btn = document.querySelector('.sk__pause');
btn.addEventListener('click', function () {
  var on = btn.getAttribute('aria-pressed') === 'true';
  btn.setAttribute('aria-pressed', String(!on));
  root.classList.toggle('is-paused', !on);
});

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

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

const SHAPES = [1, 2, 3, 4, 1, 2, 3, 4];

export default function ProjectSkillsStack({ duration = 13, easing = "linear", color = "#17141a" }: ProjectSkillsStackProps) {
  const [paused, setPaused] = useState(false);
  const vars: Vars = { "--duration": `${duration}s`, "--easing": easing, "--color": color };

  return (
    <section className={`${styles.sk} ${paused ? styles.paused : ""}`} style={vars} aria-label="기술 스택">
      <p className={styles.label}>SKILLS</p>
      <div className={styles.viewport}>
        <div className={styles.track}>
          {SHAPES.map((n, i) => (
            <span key={i} className={`${styles.chip} ${styles[`chip${n}`]}`} aria-hidden="true" />
          ))}
        </div>
      </div>
      <button
        type="button"
        className={styles.pause}
        aria-pressed={paused}
        onClick={() => setPaused((v) => !v)}
      >
        흐름 멈추기
      </button>
    </section>
  );
}