مجموعة مقسّمة

<div class="bt btg">
  <div class="seg" role="radiogroup" aria-label="المدى الزمني">
    <span class="ind" aria-hidden="true"></span>
    <button role="radio" aria-checked="true" data-ar="اليوم" data-en="Today">اليوم</button>
    <button role="radio" aria-checked="false" data-ar="الأسبوع" data-en="Week">الأسبوع</button>
    <button role="radio" aria-checked="false" data-ar="الشهر" data-en="Month">الشهر</button>
  </div>
  <div class="out"><b class="tmp num"></b><span class="dsc"></span></div>
</div>

/* pt-scoped */
/* button-segmented — تطبيق طقس */
.btg{width:100%;height:100%;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:9px;padding:10px;
  font-size:10px;color:var(--pt-text-secondary);overflow:hidden}
.btg .lbl{font-size:8px;color:var(--pt-text-muted);text-align:center}
.btg button{font:inherit;cursor:pointer;display:inline-flex;align-items:center;
  justify-content:center;gap:5px;white-space:nowrap;
  transition:background var(--pt-motion-duration-fast) var(--pt-motion-easing-standard),
             border-color var(--pt-motion-duration-fast) var(--pt-motion-easing-standard),
             color var(--pt-motion-duration-fast) var(--pt-motion-easing-standard),
             transform var(--pt-motion-duration-fast) var(--pt-motion-easing-standard),
             box-shadow var(--pt-motion-duration-fast) var(--pt-motion-easing-standard)}
.btg button:disabled{cursor:not-allowed}
.btg button:focus-visible{outline:2px solid var(--pt-focus-ring);outline-offset:2px}
/* أي زرّ ينزل بمقدار بكسل عند الضغط — تأكيد لمسيّ قبل وصول الردّ */
.btg button:not(:disabled):active{transform:translateY(1px)}
@media(prefers-reduced-motion:reduce){.btg button{transition:none}
.btg button:not(:disabled):active{transform:none}
}
/* هدف اللمس 44 بكسلًا على الشاشات اللمسية دون تضخيم سطح المكتب */
@media(pointer:coarse){.btg button{min-height:44px;min-width:44px}
}
/* شكل: كبسولة داخل كبسولة، مؤشّر منزلق */
.btg .seg{position:relative;display:flex;gap:2px;padding:3px;
  border-radius:var(--pt-radius-full);background:var(--pt-bg-inset);
  border:1px solid var(--pt-border-subtle)}
.btg .seg button{position:relative;z-index:1;padding:6px 16px;border:0;background:transparent;
  border-radius:var(--pt-radius-full);color:var(--pt-text-muted);font-size:9px;font-weight:600}
.btg .seg button[aria-checked=true]{color:var(--pt-color-ink-900)}
.btg .ind{position:absolute;inset-block:3px;border-radius:var(--pt-radius-full);
  background:var(--pt-accent);
  transition:inset-inline-start var(--pt-motion-duration-normal) var(--pt-motion-easing-emphasized),
             width var(--pt-motion-duration-normal) var(--pt-motion-easing-emphasized)}
@media(prefers-reduced-motion:reduce){.btg .ind{transition:none}
}
.btg .out{display:flex;flex-direction:column;align-items:center;gap:1px}
.btg .tmp{font-size:20px;color:var(--pt-text-primary);font-weight:700;line-height:1}
.btg .dsc{font-size:8px;color:var(--pt-text-muted)}

/* يعمل داخل إطار معزول — لا يعتمد على شيء خارجه */
/* pt-remount — يعاد التركيب عند تبديل اللغة */
(function () {
  var host = document.querySelector('.btg');
  if (!host) return;
  var snapshot = host.innerHTML;
  var timers = [];
  var ac = null;

  /* الجسم كما كتبه المولِّد. يستقبل بدائل مظلَّلة لـ root وdocument
     والمؤقّتات، فينظّف نفسه دون أن يعرف أنه قابل لإعادة التركيب. */
  function run(root, document, setTimeout, setInterval) {
    var ar = document.documentElement.lang !== 'en';
    var n = function (v) { return Number(v).toLocaleString('en-US'); };
    var seg = root.querySelector('.seg'), ind = root.querySelector('.ind');
    var btns = [].slice.call(seg.querySelectorAll('button'));
    var tmp = root.querySelector('.tmp'), dsc = root.querySelector('.dsc');
    var DATA = [
      { t: 38, d: { ar: 'صحو · العظمى الآن', en: 'Clear · current high' } },
      { t: 35, d: { ar: 'متوسّط سبعة أيّام', en: 'Seven-day average' } },
      { t: 33, d: { ar: 'متوسّط الشهر', en: 'Month average' } }
    ];
    function move() {
      var cur = seg.querySelector('[aria-checked=true]');
      var r = cur.getBoundingClientRect(), p = seg.getBoundingClientRect();
      var rtl = getComputedStyle(seg).direction === 'rtl';
      ind.style.width = r.width + 'px';
      ind.style.insetInlineStart = (rtl ? p.right - r.right : r.left - p.left) + 'px';
      var i = btns.indexOf(cur);
      tmp.textContent = DATA[i].t + '°';
      dsc.textContent = ar ? DATA[i].d.ar : DATA[i].d.en;
    }
    function pick(b) {
      btns.forEach(function (x) { x.setAttribute('aria-checked', String(x === b)); });
      move();
    }
    btns.forEach(function (b, i) {
      b.addEventListener('click', function () { pick(b); });
      b.addEventListener('keydown', function (e) {
        if (e.key !== 'ArrowRight' && e.key !== 'ArrowLeft') return;
        e.preventDefault();
        /* الاتجاه لا اسم المفتاح: في RTL السهم الأيسر يتقدّم لا يتراجع */
        var rtl = getComputedStyle(seg).direction === 'rtl';
        var fwd = rtl ? e.key === 'ArrowLeft' : e.key === 'ArrowRight';
        var next = btns[(i + (fwd ? 1 : btns.length - 1)) % btns.length];
        next.focus(); pick(next);
      });
    });
    new ResizeObserver(move).observe(seg);
    requestAnimationFrame(move);
  }

  function mount() {
    ac = new AbortController();
    var real = window.document;
    /* وسيط يمرّر كل شيء إلى المستند الحقيقي، ويعلّق كل مستمع بإشارة
       تُقطع عند إعادة التركيب — فلا يبقى مستمع من نسخة ماتت. */
    var doc = new Proxy(real, {
      get: function (t, k) {
        if (k === 'addEventListener') {
          return function (type, fn, opts) {
            var o = (opts && typeof opts === 'object') ? Object.assign({}, opts)
                                                       : { capture: !!opts };
            o.signal = ac.signal;
            return t.addEventListener(type, fn, o);
          };
        }
        var v = t[k];
        return typeof v === 'function' ? v.bind(t) : v;
      }
    });
    function track(fn) {
      return function (f, ms) { var id = fn(f, ms); timers.push(id); return id; };
    }
    run(host, doc, track(window.setTimeout.bind(window)),
        track(window.setInterval.bind(window)));
  }

  function unmount() {
    if (ac) ac.abort();
    // المعرّفان يتشاركان فضاءً واحدًا في المتصفّح، فالإلغاء المزدوج آمن
    timers.forEach(function (id) { window.clearTimeout(id); window.clearInterval(id); });
    timers = [];
    host.innerHTML = snapshot;
  }

  mount();
  addEventListener('pt-lang', function () { unmount(); mount(); });
})();

# Segmented Control

**Role:** You are an Arabic-first UI designer and front-end engineer. Read the whole
specification before writing a single line, then follow it literally. If two requirements
conflict, favour usability over visual effect.

**Goal:** Segmented Control — Single choice with a sliding indicator measured from the active segment

**Why this component matters:** Arrow keys in a radio group must follow document direction, not the key name: in RTL, ArrowLeft moves to the next item, not the previous one.

**Direction:** Genuine RTL — not a mirrored Latin layout. Use logical properties
(`margin-inline-start`, `padding-inline`, `inset-inline-start`, `text-align: start`),
never physical ones (`margin-left`, `left`). The layout must flip with `dir` on its own,
with no duplicated rules.

**Typography:** Cairo for Arabic, IBM Plex Sans for Latin. Arabic line-height must be
`0.18` higher than the Latin equivalent — dots, hamzas and maddas need more vertical room.
Arabic font-size runs `1.06×` the Latin size at the same optical weight.

**Numerals:** Western digits in both languages (`1,234.50`). Only the currency changes:
`ر.س` **after** the number in Arabic, `$` **before** it in English. Jordanian dinar
uses **three** decimal places, not two.

**Colors:** Dark mode — background `#0D142B` · surfaces `#211F54` · borders `#545C91` · text `#918FC2`.
Accent `#ADA9E8` must never exceed 8% of the screen area.

**Language:** Bilingual — every string carries both Arabic and English, and the layout
flips with `dir` automatically.

**States:** `default` · `hover` · `focus` · `active` · `disabled` · `loading` · `error`.
Do not design the resting state alone.

**Accessibility:** Contrast ratio at least `4.5:1`, complete keyboard navigation,
visible focus rings, and honour `prefers-reduced-motion`.

**Output:** Clean HTML and CSS in two separate files. No frameworks, no libraries,
no external dependencies.