عدّاد تنازلي بفرق زمني

<div class="gg ggcd" data-target="2026-12-01T18:00:00+03:00">
  <span class="k" data-ar="ملتقى الرياض للتقنية" data-en="Riyadh Tech Forum">ملتقى الرياض للتقنية</span>
  <div class="units">
    <span class="u"><b data-u="d">0</b><i data-ar="يوم" data-en="days">يوم</i></span>
    <span class="u"><b data-u="h">0</b><i data-ar="ساعة" data-en="hrs">ساعة</i></span>
    <span class="u"><b data-u="m">0</b><i data-ar="دقيقة" data-en="min">دقيقة</i></span>
    <span class="u"><b data-u="s">0</b><i data-ar="ثانية" data-en="sec">ثانية</i></span>
  </div>
  <span class="when"></span>
  <span class="live" aria-live="polite"></span>
</div>

/* pt-scoped */
/* gauge-countdown — تنظيم فعاليات */
.ggcd{width:100%;height:100%;display:flex;flex-direction:column;
  font-size:10px;color:var(--pt-text-secondary);overflow:hidden}
.ggcd .k{font-size:8.5px;color:var(--pt-text-muted)}
.ggcd .v{font-variant-numeric:tabular-nums;color:var(--pt-text-primary);line-height:1.15}
.ggcd .up{color:var(--pt-accent)}
.ggcd .dn{color:var(--pt-color-danger-400)}
/* شخصية: أربع خانات كبسولية، أرقام كبيرة، حاوية بتدرّج خفيف */
.ggcd{padding:10px;gap:6px;align-items:center;justify-content:center;
  border-radius:var(--pt-radius-xl);
  background:linear-gradient(180deg,
    color-mix(in srgb,var(--pt-accent) 7%,var(--pt-surface)),var(--pt-surface))}
.ggcd .units{display:flex;gap:5px}
.ggcd .u{display:flex;flex-direction:column;align-items:center;gap:2px;
  min-width:38px;padding:6px 4px;border-radius:var(--pt-radius-lg);
  background:var(--pt-bg-inset);border:1px solid var(--pt-border-subtle)}
.ggcd .u b{font-size:16px;font-weight:700;font-variant-numeric:tabular-nums;
  color:var(--pt-text-primary);line-height:1}
.ggcd .u i{font-style:normal;font-size:7.5px;color:var(--pt-text-muted)}
.ggcd .when{font-size:8.5px;color:var(--pt-text-muted)}
.ggcd .live{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}

/* يعمل داخل إطار معزول — لا يعتمد على شيء خارجه */
/* pt-remount — يعاد التركيب عند تبديل اللغة */
(function () {
  var host = document.querySelector('.ggcd');
  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) {
    function nf(x, d) {
      return Number(x).toLocaleString('en-US',
        { minimumFractionDigits: d || 0, maximumFractionDigits: d || 0 });
    }
    function money(x) {
      var ar = document.documentElement.lang !== 'en';
      return ar ? nf(Math.round(x * 3.75)) + ' ر.س' : '$' + nf(x);
    }
    var target = new Date(root.dataset.target).getTime();
    var out = {};
    ['d', 'h', 'm', 's'].forEach(function (u) { out[u] = root.querySelector('[data-u=' + u + ']'); });
    var live = root.querySelector('.live');
    root.querySelector('.when').textContent =
      new Date(target).toLocaleDateString('ar-SA-u-nu-latn',
        { year: 'numeric', month: 'long', day: 'numeric' });
    var lastDay = null;
    function tick() {
      // الفرق يُعاد حسابه من التاريخ في كل نبضة — الطرح المتتابع ينحرف
      // لأن setInterval غير دقيق، ولأن اللسان المخفيّ يُبطّئه
      var left = Math.max(0, target - Date.now());
      var d = Math.floor(left / 864e5);
      var h = Math.floor(left / 36e5) % 24;
      var m = Math.floor(left / 6e4) % 60;
      var s = Math.floor(left / 1e3) % 60;
      out.d.textContent = nf(d); out.h.textContent = nf(h);
      out.m.textContent = nf(m); out.s.textContent = nf(s);
      if (d !== lastDay) { lastDay = d; live.textContent = 'بقي ' + d + ' يومًا'; }
    }
    tick();
    setInterval(tick, 1000);
  }

  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(); });
})();

# Countdown from a Real Interval

**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:** Countdown from a Real Interval — Computes the gap from a real date, so it never drifts

**Why this component matters:** Counting down by subtracting one each second drifts: setInterval is not exact and a backgrounded tab throttles it. Recomputing the difference from the target date every tick is always right.

**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.