07Color swatch grid select

<main class="stage">
  <div class="cs is-demo is-open">
    <span class="cs__label" id="cs-label">Label color</span>
    <button class="cs__btn" type="button" id="cs-btn" aria-haspopup="listbox" aria-expanded="true" aria-controls="cs-grid" aria-labelledby="cs-label cs-name">
      <span class="cs__preview">
        <span class="cs__dot cs__slot cs__slot--a" style="background:#d09faa"></span>
        <span class="cs__dot cs__slot cs__slot--b" aria-hidden="true" style="background:#c0bbdd"></span>
      </span>
      <span class="cs__name" id="cs-name">
        <span class="cs__slot cs__slot--a">Coral</span>
        <span class="cs__slot cs__slot--b" aria-hidden="true">Lavender</span>
      </span>
      <span class="cs__caret" aria-hidden="true"><svg viewBox="0 0 256 256" width="12" height="12"><g fill="currentColor"><path d="m208 96l-80 80l-80-80Z" opacity=".2"/><path d="M215.39 92.94A8 8 0 0 0 208 88H48a8 8 0 0 0-5.66 13.66l80 80a8 8 0 0 0 11.32 0l80-80a8 8 0 0 0 1.73-8.72M128 164.69L67.31 104h121.38Z"/></g></svg></span>
    </button>
    <div class="cs__panel">
      <span class="cs__ring" aria-hidden="true"><svg viewBox="0 0 256 256" width="14" height="14"><g fill="#ffffff"><path d="M224 128a96 96 0 1 1-96-96a96 96 0 0 1 96 96" opacity=".2"/><path d="M173.66 98.34a8 8 0 0 1 0 11.32l-56 56a8 8 0 0 1-11.32 0l-24-24a8 8 0 0 1 11.32-11.32L112 148.69l50.34-50.35a8 8 0 0 1 11.32 0M232 128A104 104 0 1 1 128 24a104.11 104.11 0 0 1 104 104m-16 0a88 88 0 1 0-88 88a88.1 88.1 0 0 0 88-88"/></g></svg></span>
      <div class="cs__grid" id="cs-grid" role="listbox" aria-labelledby="cs-label" tabindex="-1">
        <span class="cs__sw" role="option" aria-selected="true" aria-label="Coral" style="background:#d09faa"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Tangerine" style="background:#c7ae8c"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Lemon" style="background:#d7caad"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Mint" style="background:#62b29d"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Ocean" style="background:#5393a8"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Lavender" style="background:#c0bbdd"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Blossom" style="background:#e9d2da"></span>
        <span class="cs__sw" role="option" aria-selected="false" aria-label="Ink" style="background:#2b2d42"></span>
      </div>
    </div>
  </div>
</main>

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

$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-blue;

@include stage($stage-orange);

.cs {
  position: relative;
  box-sizing: border-box;
  width: min(180px, 84vw);
  // 열린 패널은 absolute 라 높이에 안 잡힌다 — 그만큼 아래를 비워 둔다
  padding-bottom: 96px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: $stage-ink;
}
.cs__label {
  display: block;
  font-size: 10px; line-height: 12px; font-weight: 800;
  letter-spacing: .04em;
  color: $subject-ink;
  margin: 0 0 $sp-1;
}
.cs__btn {
  box-sizing: border-box;
  width: 100%; height: 32px;
  display: flex; align-items: center; gap: $sp-2;
  padding: 0 $sp-3;
  border: 0;
  background: #fff;
  border-radius: $r-control;
  color: $stage-ink;
  font-family: inherit;
  font-size: 12px; font-weight: 700;
  cursor: pointer;
  box-shadow: $shadow-press;
}
.cs__preview, .cs__name { display: inline-grid; }
.cs__slot { grid-area: 1 / 1; }
.cs__slot--b { opacity: 0; }
.cs__dot {
  display: block;
  width: 16px; height: 16px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(23, 20, 26, .16);
}
.cs__caret { margin-left: auto; display: inline-flex; color: rgba(23, 20, 26, .4); }

.cs__panel {
  position: absolute;
  top: 52px; left: 0;
  box-sizing: border-box;
  padding: $sp-2;
  background: #fff;
  border-radius: $r-card;
  box-shadow: $shadow-raised;
  transform-origin: top left; // 규칙8: 버튼 좌상단에서 팝
  transform: scale(.9);
  opacity: 0;
  pointer-events: none;
  transition: transform $duration $easing, opacity $duration $easing;
}
.cs.is-open .cs__panel { transform: scale(1); opacity: 1; pointer-events: auto; }
.cs__grid {
  display: grid;
  grid-template-columns: repeat(4, 32px);
  gap: $sp-3;
}
.cs__grid:focus-visible { outline: 2px solid $color; outline-offset: 4px; border-radius: $r-sm; }
.cs__sw {
  width: 32px; height: 32px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(23, 20, 26, .12);
  transition: transform $duration $easing;
}
.cs__sw:hover { transform: scale(1.12); }
.cs__ring {
  position: absolute;
  top: 17px; left: 17px;
  z-index: 1;
  display: inline-flex;
  pointer-events: none;
  filter: drop-shadow(0 1px 2px rgba(23, 20, 26, .45));
  transform: translate(0, 0);
  transition: transform $duration $easing;
}

// ── 자동 루프: 체크가 첫 색에서 여섯 번째 색(2행 3열)으로 갔다가 그대로 되돌아온다 ──
.cs.is-demo .cs__ring { animation: cs-hop $dur-loop $easing infinite; }
// 미리보기 원과 색 이름은 겹쳐 놓은 두 겹이라 steps(1) 로 한 번에 갈아 끼운다 (서서히 겹치면 두 색이 동시에 비친다)
.cs.is-demo .cs__slot--a { animation: cs-swap-a $dur-loop steps(1, end) infinite; }
.cs.is-demo .cs__slot--b { animation: cs-swap-b $dur-loop steps(1, end) infinite; }
@keyframes cs-hop {
  0%, 100% { transform: translate(0, 0); }
  30%, 70% { transform: translate(88px, 44px); }
}
@keyframes cs-swap-a {
  0%, 29%   { opacity: 1; }
  30%, 69%  { opacity: 0; }
  70%, 100% { opacity: 1; }
}
@keyframes cs-swap-b {
  0%, 29%   { opacity: 0; }
  30%, 69%  { opacity: 1; }
  70%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .cs.is-demo .cs__ring, .cs.is-demo .cs__slot--a, .cs.is-demo .cs__slot--b { animation: none !important; }
  .cs__slot--b { opacity: 0; }
  .cs__panel, .cs__ring, .cs__sw { transition: 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);
}

.cs {
  position: relative;
  box-sizing: border-box;
  width: min(180px, 84vw);
  padding-bottom: 96px;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  color: #17141a;
}

.cs__label {
  display: block;
  font-size: 10px;
  line-height: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #17141a;
  margin: 0 0 4px;
}

.cs__btn {
  box-sizing: border-box;
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  border: 0;
  background: #fff;
  border-radius: 12px;
  color: #17141a;
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.cs__preview, .cs__name {
  display: inline-grid;
}

.cs__slot {
  grid-area: 1/1;
}

.cs__slot--b {
  opacity: 0;
}

.cs__dot {
  display: block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(23, 20, 26, 0.16);
}

.cs__caret {
  margin-left: auto;
  display: inline-flex;
  color: rgba(23, 20, 26, 0.4);
}

.cs__panel {
  position: absolute;
  top: 52px;
  left: 0;
  box-sizing: border-box;
  padding: 8px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  transform-origin: top left;
  transform: scale(0.9);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1), opacity 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.cs.is-open .cs__panel {
  transform: scale(1);
  opacity: 1;
  pointer-events: auto;
}

.cs__grid {
  display: grid;
  grid-template-columns: repeat(4, 32px);
  gap: 12px;
}

.cs__grid:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 4px;
  border-radius: 8px;
}

.cs__sw {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px rgba(23, 20, 26, 0.12);
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.cs__sw:hover {
  transform: scale(1.12);
}

.cs__ring {
  position: absolute;
  top: 17px;
  left: 17px;
  z-index: 1;
  display: inline-flex;
  pointer-events: none;
  filter: drop-shadow(0 1px 2px rgba(23, 20, 26, 0.45));
  transform: translate(0, 0);
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.cs.is-demo .cs__ring {
  animation: cs-hop 2s cubic-bezier(0.2, 1.4, 0.4, 1) infinite;
}

.cs.is-demo .cs__slot--a {
  animation: cs-swap-a 2s steps(1, end) infinite;
}

.cs.is-demo .cs__slot--b {
  animation: cs-swap-b 2s steps(1, end) infinite;
}

@keyframes cs-hop {
  0%, 100% {
    transform: translate(0, 0);
  }
  30%, 70% {
    transform: translate(88px, 44px);
  }
}
@keyframes cs-swap-a {
  0%, 29% {
    opacity: 1;
  }
  30%, 69% {
    opacity: 0;
  }
  70%, 100% {
    opacity: 1;
  }
}
@keyframes cs-swap-b {
  0%, 29% {
    opacity: 0;
  }
  30%, 69% {
    opacity: 1;
  }
  70%, 100% {
    opacity: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .cs.is-demo .cs__ring, .cs.is-demo .cs__slot--a, .cs.is-demo .cs__slot--b {
    animation: none !important;
  }
  .cs__slot--b {
    opacity: 0;
  }
  .cs__panel, .cs__ring, .cs__sw {
    transition: none;
  }
}

// 실제 동작: 색을 고르면 체크가 그 색 위로 옮겨가고 버튼의 미리보기 원이 그 색이 된다.
var root = document.querySelector('.cs');
var btn = document.getElementById('cs-btn');
var grid = document.getElementById('cs-grid');
var ring = root.querySelector('.cs__ring');
var preview = root.querySelector('.cs__preview');
var name = document.getElementById('cs-name');
var sws = [].slice.call(grid.querySelectorAll('.cs__sw'));
var STEP = 44;
var at = 0;
function place(i) {
  ring.style.transform = 'translate(' + ((i % 4) * STEP) + 'px,' + (Math.floor(i / 4) * STEP) + 'px)';
}
function pick(i) {
  root.classList.remove('is-demo');
  at = i;
  sws.forEach(function (s, k) { s.setAttribute('aria-selected', String(k === i)); });
  place(i);
  preview.innerHTML = '<span class="cs__dot" style="background:' + sws[i].style.background + '"></span>';
  name.textContent = sws[i].getAttribute('aria-label');
}
function open(on) {
  root.classList.remove('is-demo');
  root.classList.toggle('is-open', on);
  btn.setAttribute('aria-expanded', String(on));
  if (on) grid.focus({ preventScroll: true });
}
btn.addEventListener('click', function () { open(!root.classList.contains('is-open')); });
sws.forEach(function (s, i) { s.addEventListener('click', function () { pick(i); }); });
grid.addEventListener('keydown', function (e) {
  var step = { ArrowRight: 1, ArrowLeft: -1, ArrowDown: 4, ArrowUp: -4 }[e.key];
  if (step) { pick(Math.max(0, Math.min(at + step, sws.length - 1))); e.preventDefault(); }
  else if (e.key === 'Escape') { open(false); btn.focus({ preventScroll: true }); }
});
document.addEventListener('click', function (e) { if (!e.target.closest('.cs')) open(false); });

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

export type Swatch = { name: string; hex: string };

export type ColorSwatchSelectProps = {
  label?: string;
  swatches?: Swatch[];
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type KeyEvt = { key: string; preventDefault: () => void };
type ChangeEvt = { target: { value: string } };
type ClickEvt = { stopPropagation: () => void };

const COLS = 4;
const STEP = 44;

const DEFAULT_SWATCHES: Swatch[] = [
  { name: "Coral", hex: "#ef476f" },
  { name: "Tangerine", hex: "#ff9f1c" },
  { name: "Lemon", hex: "#ffc94d" },
  { name: "Mint", hex: "#06d6a0" },
  { name: "Ocean", hex: "#118ab2" },
  { name: "Lavender", hex: "#7b61ff" },
  { name: "Blossom", hex: "#f48fb1" },
  { name: "Ink", hex: "#2b2d42" },
];

const KEY_STEP: Record<string, number | undefined> = {
  ArrowRight: 1,
  ArrowLeft: -1,
  ArrowDown: COLS,
  ArrowUp: -COLS,
};

export default function ColorSwatchSelect({
  label = "Label color",
  swatches = DEFAULT_SWATCHES,
  duration = 180,
  easing = "cubic-bezier(.34,1.56,.64,1)",
  color = "#2f6df6",
}: ColorSwatchSelectProps) {
  const [open, setOpen] = useState(false);
  const [picked, setPicked] = useState(0);
  const rootRef = useRef<HTMLDivElement>(null);
  const btnRef = useRef<HTMLButtonElement>(null);
  const gridRef = useRef<HTMLDivElement>(null);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };
  const current = swatches[picked];
  const ringStyle: CSSProperties = {
    transform: `translate(${(picked % COLS) * STEP}px, ${Math.floor(picked / COLS) * STEP}px)`,
  };

  useEffect(() => {
    function onDocClick(e: MouseEvent) {
      if (rootRef.current && !rootRef.current.contains(e.target as Node)) setOpen(false);
    }
    document.addEventListener("click", onDocClick);
    return () => document.removeEventListener("click", onDocClick);
  }, []);

  useEffect(() => {
    if (open) gridRef.current?.focus({ preventScroll: true });
  }, [open]);

  function pick(i: number) {
    setPicked(Math.max(0, Math.min(i, swatches.length - 1)));
  }

  return (
    <div className={`${styles.cs} ${open ? styles.isOpen : ""}`} style={vars} ref={rootRef}>
      <span className={styles.label} id="cs-label">{label}</span>
      <button
        ref={btnRef}
        type="button"
        id="cs-btn"
        className={styles.btn}
        aria-haspopup="listbox"
        aria-expanded={open}
        aria-controls="cs-grid"
        aria-labelledby="cs-label cs-name"
        onClick={() => setOpen((o) => !o)}
      >
        <span className={styles.dot} style={{ background: current.hex }} />
        <span className={styles.name} id="cs-name">{current.name}</span>
        <span className={styles.caret} aria-hidden="true">
          <svg viewBox="0 0 256 256" width="12" height="12">
            <g fill="currentColor">
              <path d="m208 96l-80 80l-80-80Z" opacity=".2" />
              <path d="M215.39 92.94A8 8 0 0 0 208 88H48a8 8 0 0 0-5.66 13.66l80 80a8 8 0 0 0 11.32 0l80-80a8 8 0 0 0 1.73-8.72M128 164.69L67.31 104h121.38Z" />
            </g>
          </svg>
        </span>
      </button>
      <div className={styles.panel}>
        <span className={styles.ring} style={ringStyle} aria-hidden="true">
          <svg viewBox="0 0 256 256" width="14" height="14">
            <g fill="#ffffff">
              <path d="M224 128a96 96 0 1 1-96-96a96 96 0 0 1 96 96" opacity=".2" />
              <path d="M173.66 98.34a8 8 0 0 1 0 11.32l-56 56a8 8 0 0 1-11.32 0l-24-24a8 8 0 0 1 11.32-11.32L112 148.69l50.34-50.35a8 8 0 0 1 11.32 0M232 128A104 104 0 1 1 128 24a104.11 104.11 0 0 1 104 104m-16 0a88 88 0 1 0-88 88a88.1 88.1 0 0 0 88-88" />
            </g>
          </svg>
        </span>
        <div
          ref={gridRef}
          id="cs-grid"
          className={styles.grid}
          role="listbox"
          aria-labelledby="cs-label"
          tabIndex={-1}
          onKeyDown={(e: KeyEvt) => {
            const step = KEY_STEP[e.key];
            if (step) { pick(picked + step); e.preventDefault(); }
            else if (e.key === "Escape") { setOpen(false); btnRef.current?.focus({ preventScroll: true }); }
          }}
        >
          {swatches.map((s, i) => (
            <span
              key={s.hex}
              className={styles.sw}
              role="option"
              aria-selected={i === picked}
              aria-label={s.name}
              style={{ background: s.hex }}
              onClick={() => pick(i)}
            />
          ))}
        </div>
      </div>
    </div>
  );
}