07Color swatch pick

<main class="stage">
  <fieldset class="swatches is-demo">
    <legend class="sr-only">Choose a color</legend>
    <label class="swatch"><input type="radio" name="color" class="sr-input" checked aria-label="Color 1"><span class="swatch__chip swatch__chip--1" aria-hidden="true"></span></label>
    <label class="swatch"><input type="radio" name="color" class="sr-input" aria-label="Color 2"><span class="swatch__chip swatch__chip--2" aria-hidden="true"></span></label>
    <label class="swatch"><input type="radio" name="color" class="sr-input" aria-label="Color 3"><span class="swatch__chip swatch__chip--3" aria-hidden="true"></span></label>
    <label class="swatch"><input type="radio" name="color" class="sr-input" aria-label="Color 4"><span class="swatch__chip swatch__chip--4" aria-hidden="true"></span></label>
  </fieldset>
</main>

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

// ── 변수 3개 ──────────────────────────────
$duration: $dur-quick;
$easing: $ease-pop;
$color: $subject-cream;

// ── 데모 무대 ───────────────────────────────
@include stage($stage-orange);

.sr-input {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.swatches { display: flex; gap: clamp(8px, 2.6vw, 14px); border: 0; margin: 0; padding: 0; }
.swatch { position: relative; display: inline-flex; padding: 5px; border-radius: 50%; cursor: pointer; }
.swatch::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%; border: 2px solid $color;
  transform: scale(0); opacity: 0; transition: transform $duration $easing, opacity $duration $easing;
}
.swatch:has(.sr-input:checked)::after { transform: scale(1); opacity: 1; }
.sr-input:focus-visible ~ .swatch__chip { box-shadow: 0 0 0 3px rgba($subject-cream, .5); }
.swatch__chip { width: 28px; height: 28px; border-radius: 50%; display: block; box-shadow: $shadow-press; }
.swatch__chip--1 { background: $subject-blue; }
.swatch__chip--2 { background: $stage-yellow; }
.swatch__chip--3 { background: $stage-ink; }
.swatch__chip--4 { background: $subject-cream; }

@media (prefers-reduced-motion: reduce) {
  // 접근성: 움직임 줄이기 설정이면 트랜지션을 즉시 끝낸다
  .swatch::after { transition-duration: 1ms !important; }
}

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);
}

.sr-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.swatches {
  display: flex;
  gap: clamp(8px, 2.6vw, 14px);
  border: 0;
  margin: 0;
  padding: 0;
}

.swatch {
  position: relative;
  display: inline-flex;
  padding: 5px;
  border-radius: 50%;
  cursor: pointer;
}

.swatch::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid #fff7e6;
  transform: scale(0);
  opacity: 0;
  transition: transform 220ms cubic-bezier(0.2, 1.4, 0.4, 1), opacity 220ms cubic-bezier(0.2, 1.4, 0.4, 1);
}

.swatch:has(.sr-input:checked)::after {
  transform: scale(1);
  opacity: 1;
}

.sr-input:focus-visible ~ .swatch__chip {
  box-shadow: 0 0 0 3px rgba(255, 247, 230, 0.5);
}

.swatch__chip {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: block;
  box-shadow: 0 6px 12px rgba(23, 20, 26, 0.32);
}

.swatch__chip--1 {
  background: #2f6df6;
}

.swatch__chip--2 {
  background: #ffd23f;
}

.swatch__chip--3 {
  background: #17141a;
}

.swatch__chip--4 {
  background: #fff7e6;
}

@media (prefers-reduced-motion: reduce) {
  .swatch::after {
    transition-duration: 1ms !important;
  }
}

// .is-demo 데모용 자동 순환. 실제로는 클릭이 :checked 를 바꾼다 (6줄)
document.querySelectorAll('.is-demo').forEach(function (grp) {
  var inputs = grp.querySelectorAll('.sr-input'); var i = 0;
  var t = function () { inputs[i % inputs.length].checked = true; i++; };
  t(); setInterval(t, 500);
});

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

export type Swatch = { value: string; color: string; label: string };
export type ColorSwatchPickProps = {
  legend?: string;
  swatches?: Swatch[];
  duration?: number;
  easing?: string;
  ringColor?: string;
};

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

export default function ColorSwatchPick({
  legend = "Choose a color",
  swatches = [
    { value: "1", color: "#2f6df6", label: "Color 1" },
    { value: "2", color: "#ffd23f", label: "Color 2" },
    { value: "3", color: "#17141a", label: "Color 3" },
    { value: "4", color: "#fff7e6", label: "Color 4" },
  ],
  duration = 220,
  easing = "cubic-bezier(.2,1.4,.4,1)",
  ringColor = "#fff7e6",
}: ColorSwatchPickProps) {
  const [value, setValue] = useState(swatches[0]?.value);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--ring": ringColor };

  return (
    <fieldset className={styles.swatches} style={vars}>
      <legend className={styles.srOnly}>{legend}</legend>
      {swatches.map((s) => (
        <label className={styles.swatch} key={s.value} data-checked={value === s.value}>
          <input
            type="radio"
            name="swatch"
            className={styles.srInput}
            checked={value === s.value}
            onChange={() => setValue(s.value)}
            aria-label={s.label}
          />
          <span className={styles.chip} style={{ background: s.color }} aria-hidden="true" />
        </label>
      ))}
    </fieldset>
  );
}