06칩을 눌러 문장이 되는 반복 규칙

<main class="stage">
  <div class="rc is-demo">
    <div class="rc__seg" id="rc-seg" data-m="w" role="radiogroup" aria-label="반복 주기">
      <span class="rc__ind" aria-hidden="true"></span>
      <button class="rc__opt" type="button" role="radio" aria-checked="true" data-m="w">매주</button>
      <button class="rc__opt" type="button" role="radio" aria-checked="false" data-m="m">매월</button>
    </div>

    <div class="rc__days" role="group" aria-label="반복 요일">
      <button class="rc__chip" type="button" role="checkbox" aria-checked="false" aria-label="일요일" data-w="0">일</button>
      <button class="rc__chip" type="button" role="checkbox" aria-checked="true"  aria-label="월요일" data-w="1">월</button>
      <button class="rc__chip" type="button" role="checkbox" aria-checked="false" aria-label="화요일" data-w="2">화</button>
      <button class="rc__chip" type="button" role="checkbox" aria-checked="true"  aria-label="수요일" data-w="3">수</button>
      <button class="rc__chip" type="button" role="checkbox" aria-checked="false" aria-label="목요일" data-w="4">목</button>
      <button class="rc__chip" type="button" role="checkbox" aria-checked="true"  aria-label="금요일" data-w="5">금</button>
      <button class="rc__chip" type="button" role="checkbox" aria-checked="false" aria-label="토요일" data-w="6">토</button>
    </div>

    <p class="rc__sum" aria-live="polite">
      <span class="rc__cut" data-k="1">매주 월·수·금 오전 9시</span>
      <span class="rc__cut" data-k="2" aria-hidden="true">매주 월·수·목·금 오전 9시</span>
      <span class="rc__cut" data-k="3" aria-hidden="true">매주 월·화·수·목·금 오전 9시</span>
      <span class="rc__cut" data-k="4" aria-hidden="true">매월 둘째 주 월요일 오전 9시</span>
    </p>
  </div>
</main>

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

$duration: $dur-loop;
$easing: $ease-spring;
$color: $subject-ink;

@include stage($stage-yellow);

.rc {
  --seg-w: 72px; // 세그먼트 한 칸 폭 = 인디케이터가 옮겨가는 거리 (BD19: 칸은 flex: 0 0 auto)
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: $sp-3;
  width: min(300px, 90vw);
  color: $color;
}

// ── 매주 / 매월 세그먼트 두 칸 ──
.rc__seg {
  position: relative;
  display: flex;
  gap: 0;
  padding: $sp-1;
  border-radius: $r-pill;
  background-color: rgba($subject-ink, .16);
}
.rc__ind {
  position: absolute;
  left: $sp-1;
  top: $sp-1;
  width: var(--seg-w);
  height: 28px;
  border-radius: $r-pill;
  background-color: $color;
  transform: translateX(0);
  transition: transform $dur-base $easing;
}
.rc__seg[data-m="m"] .rc__ind { transform: translateX(var(--seg-w)); }

.rc__opt {
  position: relative;
  flex: 0 0 auto;
  width: var(--seg-w);
  height: 28px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: $r-pill;
  background-color: transparent;
  color: $color;
  font-size: clamp(12px, 3.6vw, 13px);
  line-height: 28px;
  font-weight: 700;
  cursor: pointer;
}
.rc__opt[aria-checked="true"] { color: $stage-yellow; }
.rc__opt:focus-visible { outline: 3px solid $color; outline-offset: 2px; }

// ── 요일 칩 일곱 개 ──
.rc__days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: $sp-1;
  width: 100%;
}
.rc__chip {
  margin: 0;
  padding: 0;
  height: 30px;
  border: 2px solid $color;
  border-radius: $r-pill;
  background-color: transparent;
  color: $color;
  font-size: clamp(11px, 3.4vw, 13px);
  line-height: 26px;
  font-weight: 700;
  cursor: pointer;
}
.rc__chip[aria-checked="true"] { background-color: $color; color: $stage-yellow; }
.rc__chip:focus-visible { outline: 3px solid $color; outline-offset: 2px; }

// ── 라이브 요약 문장 ──
.rc__sum {
  position: relative;
  margin: 0;
  width: 100%;
  height: 38px;
}
.rc__cut {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  text-align: center;
  font-size: clamp(12px, 3.8vw, 14px);
  line-height: 19px;
  font-weight: 700;
  opacity: 0;
}
.rc__cut[data-k="1"] { opacity: 1; }

// ── 자동 루프: 칩 두 개가 차례로 켜지고 문장이 컷으로 갈리며 세그먼트가 한 번 옮겨간다 ──
.rc.is-demo .rc__ind {
  animation-name: rc-ind;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}
// 인디케이터가 매월로 옮겨 앉는 66% 가 이 데모의 주인공 장면이다 — 요약 문장도 그 프레임에 함께 갈린다
@keyframes rc-ind {
  0%, 62%   { transform: translateX(0); }
  70%, 76%  { transform: translateX(var(--seg-w)); }
  86%, 100% { transform: translateX(0); }
}

.rc.is-demo .rc__opt {
  animation-duration: $duration;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}
.rc.is-demo .rc__opt[data-m="w"] { animation-name: rc-ow; }
.rc.is-demo .rc__opt[data-m="m"] { animation-name: rc-om; }
// 라벨 색은 인디케이터가 그 칸을 덮는 순간에 맞춰 갈린다 — 어긋나면 먹 글자가 먹 알약 위에 얹혀 사라진다
@keyframes rc-ow { 0% { color: $stage-yellow; } 64% { color: $color; } 78% { color: $stage-yellow; } 100% { color: $stage-yellow; } }
@keyframes rc-om { 0% { color: $color; } 64% { color: $stage-yellow; } 78% { color: $color; } 100% { color: $color; } }

// 켜짐은 한 프레임에 컷 — 그 옆에 눌림 반동(scale)을 붙여 프레임을 채운다
.rc.is-demo .rc__chip[data-w="4"],
.rc.is-demo .rc__chip[data-w="2"] {
  animation-duration: $duration, $duration;
  animation-timing-function: steps(1, end), $ease-pop;
  animation-iteration-count: infinite, infinite;
  animation-fill-mode: backwards, backwards;
}
.rc.is-demo .rc__chip[data-w="4"] { animation-name: rc-on4, rc-pop4; }
.rc.is-demo .rc__chip[data-w="2"] { animation-name: rc-on2, rc-pop2; }
// 끄기는 한 프레임에 몰지 않고 74% · 82% 로 나눈다 (되돌림이 최대 변화가 되면 poster 가 빈 장면이 된다)
@keyframes rc-on4 {
  0%   { background-color: transparent; color: $color; }
  20%  { background-color: $color; color: $stage-yellow; }
  74%  { background-color: transparent; color: $color; }
  100% { background-color: transparent; color: $color; }
}
@keyframes rc-on2 {
  0%   { background-color: transparent; color: $color; }
  40%  { background-color: $color; color: $stage-yellow; }
  82%  { background-color: transparent; color: $color; }
  100% { background-color: transparent; color: $color; }
}
@keyframes rc-pop4 {
  0%, 19%   { transform: scale(1); }
  22%       { transform: scale(.86); }
  29%       { transform: scale(1.12); }
  36%, 100% { transform: scale(1); }
}
@keyframes rc-pop2 {
  0%, 39%   { transform: scale(1); }
  42%       { transform: scale(.86); }
  49%       { transform: scale(1.12); }
  56%, 100% { transform: scale(1); }
}

.rc.is-demo .rc__cut {
  animation-duration: $duration;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}
.rc.is-demo .rc__cut[data-k="1"] { animation-name: rc-k1; }
.rc.is-demo .rc__cut[data-k="2"] { animation-name: rc-k2; }
.rc.is-demo .rc__cut[data-k="3"] { animation-name: rc-k3; }
.rc.is-demo .rc__cut[data-k="4"] { animation-name: rc-k4; }
@keyframes rc-k1 { 0% { opacity: 1; } 20% { opacity: 0; } 86% { opacity: 1; } 100% { opacity: 1; } }
@keyframes rc-k2 { 0% { opacity: 0; } 20% { opacity: 1; } 40% { opacity: 0; } 100% { opacity: 0; } }
@keyframes rc-k3 { 0% { opacity: 0; } 40% { opacity: 1; } 66% { opacity: 0; } 100% { opacity: 0; } }
@keyframes rc-k4 { 0% { opacity: 0; } 66% { opacity: 1; } 86% { opacity: 0; } 100% { opacity: 0; } }

.rc.is-demo .rc__sum {
  animation-name: rc-drop;
  animation-duration: $duration;
  animation-timing-function: $easing;
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}
@keyframes rc-drop {
  0%, 19%   { transform: translateY(0); }
  22%       { transform: translateY(6px); }
  29%       { transform: translateY(0); }
  39%       { transform: translateY(0); }
  42%       { transform: translateY(6px); }
  49%       { transform: translateY(0); }
  65%       { transform: translateY(0); }
  68%       { transform: translateY(6px); }
  75%, 100% { transform: translateY(0); }
}

@media (max-width: 340px) {
  .rc { --seg-w: 60px; gap: $sp-2; }
  .rc__chip { height: 28px; line-height: 24px; }
  .rc__sum { height: 36px; }
  .rc__cut { line-height: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  .rc.is-demo .rc__ind,
  .rc.is-demo .rc__opt,
  .rc.is-demo .rc__chip,
  .rc.is-demo .rc__cut,
  .rc.is-demo .rc__sum { animation: none !important; }
  .rc__ind { transition: none !important; }
  .rc.is-demo .rc__cut[data-k="1"] { opacity: 1; }
}

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);
}

.rc {
  --seg-w: 72px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: min(300px, 90vw);
  color: #17141a;
}

.rc__seg {
  position: relative;
  display: flex;
  gap: 0;
  padding: 4px;
  border-radius: 999px;
  background-color: rgba(23, 20, 26, 0.16);
}

.rc__ind {
  position: absolute;
  left: 4px;
  top: 4px;
  width: var(--seg-w);
  height: 28px;
  border-radius: 999px;
  background-color: #17141a;
  transform: translateX(0);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.rc__seg[data-m=m] .rc__ind {
  transform: translateX(var(--seg-w));
}

.rc__opt {
  position: relative;
  flex: 0 0 auto;
  width: var(--seg-w);
  height: 28px;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background-color: transparent;
  color: #17141a;
  font-size: clamp(12px, 3.6vw, 13px);
  line-height: 28px;
  font-weight: 700;
  cursor: pointer;
}

.rc__opt[aria-checked=true] {
  color: #ffd23f;
}

.rc__opt:focus-visible {
  outline: 3px solid #17141a;
  outline-offset: 2px;
}

.rc__days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  width: 100%;
}

.rc__chip {
  margin: 0;
  padding: 0;
  height: 30px;
  border: 2px solid #17141a;
  border-radius: 999px;
  background-color: transparent;
  color: #17141a;
  font-size: clamp(11px, 3.4vw, 13px);
  line-height: 26px;
  font-weight: 700;
  cursor: pointer;
}

.rc__chip[aria-checked=true] {
  background-color: #17141a;
  color: #ffd23f;
}

.rc__chip:focus-visible {
  outline: 3px solid #17141a;
  outline-offset: 2px;
}

.rc__sum {
  position: relative;
  margin: 0;
  width: 100%;
  height: 38px;
}

.rc__cut {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  text-align: center;
  font-size: clamp(12px, 3.8vw, 14px);
  line-height: 19px;
  font-weight: 700;
  opacity: 0;
}

.rc__cut[data-k="1"] {
  opacity: 1;
}

.rc.is-demo .rc__ind {
  animation-name: rc-ind;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

@keyframes rc-ind {
  0%, 62% {
    transform: translateX(0);
  }
  70%, 76% {
    transform: translateX(var(--seg-w));
  }
  86%, 100% {
    transform: translateX(0);
  }
}
.rc.is-demo .rc__opt {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.rc.is-demo .rc__opt[data-m=w] {
  animation-name: rc-ow;
}

.rc.is-demo .rc__opt[data-m=m] {
  animation-name: rc-om;
}

@keyframes rc-ow {
  0% {
    color: #ffd23f;
  }
  64% {
    color: #17141a;
  }
  78% {
    color: #ffd23f;
  }
  100% {
    color: #ffd23f;
  }
}
@keyframes rc-om {
  0% {
    color: #17141a;
  }
  64% {
    color: #ffd23f;
  }
  78% {
    color: #17141a;
  }
  100% {
    color: #17141a;
  }
}
.rc.is-demo .rc__chip[data-w="4"],
.rc.is-demo .rc__chip[data-w="2"] {
  animation-duration: 2s, 2s;
  animation-timing-function: steps(1, end), cubic-bezier(0.2, 1.4, 0.4, 1);
  animation-iteration-count: infinite, infinite;
  animation-fill-mode: backwards, backwards;
}

.rc.is-demo .rc__chip[data-w="4"] {
  animation-name: rc-on4, rc-pop4;
}

.rc.is-demo .rc__chip[data-w="2"] {
  animation-name: rc-on2, rc-pop2;
}

@keyframes rc-on4 {
  0% {
    background-color: transparent;
    color: #17141a;
  }
  20% {
    background-color: #17141a;
    color: #ffd23f;
  }
  74% {
    background-color: transparent;
    color: #17141a;
  }
  100% {
    background-color: transparent;
    color: #17141a;
  }
}
@keyframes rc-on2 {
  0% {
    background-color: transparent;
    color: #17141a;
  }
  40% {
    background-color: #17141a;
    color: #ffd23f;
  }
  82% {
    background-color: transparent;
    color: #17141a;
  }
  100% {
    background-color: transparent;
    color: #17141a;
  }
}
@keyframes rc-pop4 {
  0%, 19% {
    transform: scale(1);
  }
  22% {
    transform: scale(0.86);
  }
  29% {
    transform: scale(1.12);
  }
  36%, 100% {
    transform: scale(1);
  }
}
@keyframes rc-pop2 {
  0%, 39% {
    transform: scale(1);
  }
  42% {
    transform: scale(0.86);
  }
  49% {
    transform: scale(1.12);
  }
  56%, 100% {
    transform: scale(1);
  }
}
.rc.is-demo .rc__cut {
  animation-duration: 2s;
  animation-timing-function: steps(1, end);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

.rc.is-demo .rc__cut[data-k="1"] {
  animation-name: rc-k1;
}

.rc.is-demo .rc__cut[data-k="2"] {
  animation-name: rc-k2;
}

.rc.is-demo .rc__cut[data-k="3"] {
  animation-name: rc-k3;
}

.rc.is-demo .rc__cut[data-k="4"] {
  animation-name: rc-k4;
}

@keyframes rc-k1 {
  0% {
    opacity: 1;
  }
  20% {
    opacity: 0;
  }
  86% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}
@keyframes rc-k2 {
  0% {
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  40% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes rc-k3 {
  0% {
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  66% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
@keyframes rc-k4 {
  0% {
    opacity: 0;
  }
  66% {
    opacity: 1;
  }
  86% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}
.rc.is-demo .rc__sum {
  animation-name: rc-drop;
  animation-duration: 2s;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
  animation-iteration-count: infinite;
  animation-fill-mode: backwards;
}

@keyframes rc-drop {
  0%, 19% {
    transform: translateY(0);
  }
  22% {
    transform: translateY(6px);
  }
  29% {
    transform: translateY(0);
  }
  39% {
    transform: translateY(0);
  }
  42% {
    transform: translateY(6px);
  }
  49% {
    transform: translateY(0);
  }
  65% {
    transform: translateY(0);
  }
  68% {
    transform: translateY(6px);
  }
  75%, 100% {
    transform: translateY(0);
  }
}
@media (max-width: 340px) {
  .rc {
    --seg-w: 60px;
    gap: 8px;
  }
  .rc__chip {
    height: 28px;
    line-height: 24px;
  }
  .rc__sum {
    height: 36px;
  }
  .rc__cut {
    line-height: 18px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .rc.is-demo .rc__ind,
  .rc.is-demo .rc__opt,
  .rc.is-demo .rc__chip,
  .rc.is-demo .rc__cut,
  .rc.is-demo .rc__sum {
    animation: none !important;
  }
  .rc__ind {
    transition: none !important;
  }
  .rc.is-demo .rc__cut[data-k="1"] {
    opacity: 1;
  }
}

(function () {
  var root = document.querySelector('.rc'), seg = document.getElementById('rc-seg');
  var sum = root.querySelector('.rc__cut[data-k="1"]');
  var opts = [].slice.call(root.querySelectorAll('.rc__opt'));
  var chips = [].slice.call(root.querySelectorAll('.rc__chip'));
  var SH = ['일', '월', '화', '수', '목', '금', '토'];
  var OR = ['첫째', '둘째', '셋째', '넷째', '다섯째'];
  function on(c) { return c.getAttribute('aria-checked') === 'true'; }
  // 매월 모드의 몇째 주는 실제로 센다 — 기준일에서 그 요일이 처음 오는 날짜로 주차를 구한다
  function ord(w) {
    var d = new Date(2026, 8, 12);
    d.setDate(d.getDate() + ((w - d.getDay() + 7) % 7));
    return OR[Math.ceil(d.getDate() / 7) - 1];
  }
  function render() {
    var m = seg.dataset.m, p = chips.filter(on).map(function (c) { return +c.dataset.w; });
    if (!p.length) { sum.textContent = m === 'm' ? '매월 반복 없음' : '매주 반복 없음'; return; }
    sum.textContent = m === 'm'
      ? '매월 ' + ord(p[0]) + ' 주 ' + SH[p[0]] + '요일 오전 9시'
      : p.length === 1
        ? '매주 ' + SH[p[0]] + '요일 오전 9시'
        : '매주 ' + p.map(function (w) { return SH[w]; }).join('·') + ' 오전 9시';
  }
  function wake() { root.classList.remove('is-demo'); }
  chips.forEach(function (c) {
    c.addEventListener('click', function () { wake(); c.setAttribute('aria-checked', String(!on(c))); render(); });
  });
  opts.forEach(function (o) {
    o.addEventListener('click', function () {
      wake();
      opts.forEach(function (x) { x.setAttribute('aria-checked', String(x === o)); });
      seg.dataset.m = o.dataset.m; render();
    });
  });
  seg.addEventListener('keydown', function (e) {
    var d = e.key === 'ArrowRight' ? 1 : e.key === 'ArrowLeft' ? -1 : 0;
    if (!d) return;
    e.preventDefault(); wake();
    var i = (opts.indexOf(document.activeElement) + d + 2) % 2;
    opts[i].focus({ preventScroll: true }); opts[i].click();
  });
  root.querySelector('.rc__days').addEventListener('keydown', function (e) {
    var d = e.key === 'ArrowRight' ? 1 : e.key === 'ArrowLeft' ? -1 : 0;
    if (!d) return;
    e.preventDefault();
    var i = (chips.indexOf(document.activeElement) + d + 7) % 7;
    chips[i].focus({ preventScroll: true });
  });
  render();
})();

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

export type RecurrenceWeekdayChipsProps = {
  labels?: {
    cycle: string; weekly: string; monthly: string;
    days: string; abbr: string[]; full: string[]; ordinals: string[];
    at: string; none: string;
  };
  duration?: number;
  easing?: string;
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };
type KeyEvt = { key: string; preventDefault(): void };

const DEMO_CUTS = [
  [1, 3, 5],
  [1, 3, 4, 5],
  [1, 2, 3, 4, 5],
];

export default function RecurrenceWeekdayChips({
  labels = {
    cycle: "Repeat cycle",
    weekly: "Weekly",
    monthly: "Monthly",
    days: "Repeat days",
    abbr: ["S", "M", "T", "W", "T", "F", "S"],
    full: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
    ordinals: ["1st", "2nd", "3rd", "4th", "5th"],
    at: "at 9:00 AM",
    none: "no days selected",
  },
  duration = 2000,
  easing = "cubic-bezier(.2,.8,.2,1)",
  color = "#17141a",
}: RecurrenceWeekdayChipsProps) {
  const [demo, setDemo] = useState(true);
  const [monthly, setMonthly] = useState(false);
  const [picked, setPicked] = useState<number[]>([1, 3, 5]);
  const vars: Vars = { "--duration": duration + "ms", "--easing": easing, "--color": color };

  // 매월 모드의 몇째 주는 실제로 센다 — 기준일에서 그 요일이 처음 오는 날짜로 주차를 구한다
  function ordinal(w: number): string {
    const d = new Date(2026, 8, 12);
    d.setDate(d.getDate() + ((w - d.getDay() + 7) % 7));
    return labels.ordinals[Math.ceil(d.getDate() / 7) - 1];
  }
  function sentence(mode: boolean, p: number[]): string {
    const head = mode ? labels.monthly : labels.weekly;
    if (!p.length) return head + " — " + labels.none;
    if (mode) return head + " on the " + ordinal(p[0]) + " " + labels.full[p[0]] + " " + labels.at;
    if (p.length === 1) return head + " on " + labels.full[p[0]] + " " + labels.at;
    return head + " on " + p.map((w) => labels.full[w].slice(0, 3)).join(", ") + " " + labels.at;
  }
  function wake() { setDemo(false); }
  function toggle(w: number) {
    wake();
    setPicked((p) => (p.indexOf(w) < 0 ? p.concat([w]).sort((x, y) => x - y) : p.filter((x) => x !== w)));
  }
  function segKey(e: KeyEvt) {
    const d = e.key === "ArrowRight" ? 1 : e.key === "ArrowLeft" ? -1 : 0;
    if (!d) return;
    e.preventDefault();
    wake();
    setMonthly((m) => !m);
  }

  const cuts = [
    sentence(false, DEMO_CUTS[0]),
    sentence(false, DEMO_CUTS[1]),
    sentence(false, DEMO_CUTS[2]),
    sentence(true, [1]),
  ];

  return (
    <div className={styles.rc + (demo ? " " + styles.isDemo : "")} style={vars}>
      <div className={styles.seg} data-m={monthly ? "m" : "w"} role="radiogroup"
           aria-label={labels.cycle} onKeyDown={segKey}>
        <span className={styles.ind} aria-hidden="true" />
        <button className={styles.opt} type="button" role="radio" data-m="w"
                aria-checked={!monthly} onClick={() => { wake(); setMonthly(false); }}>
          {labels.weekly}
        </button>
        <button className={styles.opt} type="button" role="radio" data-m="m"
                aria-checked={monthly} onClick={() => { wake(); setMonthly(true); }}>
          {labels.monthly}
        </button>
      </div>

      <div className={styles.days} role="group" aria-label={labels.days}>
        {labels.abbr.map((a, w) => (
          <button key={w} className={styles.chip} type="button" role="checkbox" data-w={w}
                  aria-checked={picked.indexOf(w) >= 0} aria-label={labels.full[w]}
                  onClick={() => toggle(w)}>
            {a}
          </button>
        ))}
      </div>

      <p className={styles.sum} aria-live="polite">
        <span className={styles.cut} data-k="1">{demo ? cuts[0] : sentence(monthly, picked)}</span>
        <span className={styles.cut} data-k="2" aria-hidden="true">{cuts[1]}</span>
        <span className={styles.cut} data-k="3" aria-hidden="true">{cuts[2]}</span>
        <span className={styles.cut} data-k="4" aria-hidden="true">{cuts[3]}</span>
      </p>
    </div>
  );
}