/* ── مختبر العربية — نظام التصميم ── */
:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-2: #f4f4f5;
  --fg: #09090b;
  --fg-muted: #52525b;
  --border: #e4e4e7;
  --border-strong: #d4d4d8;
  --accent: #db2777;
  --accent-soft: rgba(219, 39, 119, .1);
  --primary: #18181b;
  --on-primary: #ffffff;
  --success: #15803d;
  --success-soft: rgba(21, 128, 61, .1);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, .1);
  --shadow-sm: 0 1px 2px rgba(9, 9, 11, .06);
  --shadow: 0 4px 16px rgba(9, 9, 11, .07);
  --shadow-lg: 0 18px 48px rgba(9, 9, 11, .12);
  --font-head: 'Noto Naskh Arabic', 'Amiri', serif;
  --font-body: 'Noto Sans Arabic', system-ui, -apple-system, 'Segoe UI', Tahoma, sans-serif;
  --icon-sm: 16px;
  --icon-md: 20px;
  --icon-lg: 24px;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --ring: 0 0 0 3px var(--accent-soft);
}
body.dark {
  --bg: #09090b;
  --surface: #131316;
  --surface-2: #1c1c21;
  --fg: #fafafa;
  --fg-muted: #a1a1aa;
  --border: #27272a;
  --border-strong: #3f3f46;
  --accent: #f472b6;
  --accent-soft: rgba(244, 114, 182, .14);
  --primary: #fafafa;
  --on-primary: #18181b;
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, .12);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, .12);
  --shadow: 0 4px 18px rgba(0, 0, 0, .5);
  --shadow-lg: 0 18px 60px rgba(0, 0, 0, .6);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background .25s ease, color .25s ease;
}
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.container { width: 100%; max-width: 1120px; margin-inline: auto; padding-inline: 1.5rem; }
.icon {
  width: var(--icon-md); height: var(--icon-md);
  fill: none; stroke: currentColor; stroke-width: 1.75;
  stroke-linecap: round; stroke-linejoin: round; flex: none;
}
.icon-sm { width: var(--icon-sm); height: var(--icon-sm); }
.icon-lg { width: var(--icon-lg); height: var(--icon-lg); }
h1, h2, h3, .brand-text strong, .letter-big, .sample-naskh, .type-sample, .tashkeel-text, .footer-brand {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.35;
}

/* ── الشريط العلوي ── */
.navbar {
  position: sticky; top: 0; z-index: 40;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1120px; margin-inline: auto; padding-inline: 1.5rem;
  min-height: 68px; display: flex; align-items: center; gap: 1.25rem;
}
.brand { display: flex; align-items: center; gap: .7rem; margin-inline-end: auto; }
.brand-mark {
  width: 40px; height: 40px; flex: none; display: grid; place-items: center;
  border-radius: 12px; background: var(--primary); color: var(--on-primary);
  font-family: var(--font-head); font-size: 1.35rem; font-weight: 700; line-height: 1;
}
.brand-text { display: flex; flex-direction: column; gap: 1px; }
.brand-text strong { font-size: 1.02rem; line-height: 1.2; }
.brand-text em { font-style: normal; font-size: .72rem; color: var(--fg-muted); }
.nav-links { display: flex; gap: 1.4rem; }
.nav-links a, .mobile-menu a {
  font-size: .9rem; font-weight: 500; color: var(--fg-muted);
  padding-block: .25rem; transition: color .2s ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-actions { display: flex; align-items: center; gap: .4rem; }
.icon-btn {
  width: 40px; height: 40px; display: grid; place-items: center; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.icon-btn:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.menu-btn { display: none; }
.mobile-menu[hidden] { display: none; }
.mobile-menu {
  display: flex; flex-direction: column; gap: .1rem;
  padding: .5rem 1.5rem 1rem; border-top: 1px solid var(--border);
  background: var(--surface);
}
.mobile-menu a { padding-block: .6rem; border-bottom: 1px solid var(--border); }

/* ── الأزرار والشرائح ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .7rem 1.4rem; min-height: 46px; border: none; border-radius: 999px;
  font-size: .92rem; font-weight: 600; cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}
.btn-primary { background: var(--primary); color: var(--on-primary); box-shadow: var(--shadow); }
.btn-primary:hover:not(:disabled) { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-ghost { background: transparent; border: 1.5px solid var(--border-strong); color: var(--fg); }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); transform: translateY(-2px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-sm { padding: .45rem 1rem; min-height: 38px; font-size: .84rem; }
.badge {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .3rem .8rem; border-radius: 999px; font-size: .76rem; font-weight: 600;
  background: var(--accent-soft); color: var(--accent);
}
.badge-quiet { background: var(--surface-2); color: var(--fg-muted); }
.tabs { display: inline-flex; gap: .2rem; padding: .2rem; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); }
.tab {
  padding: .4rem 1.05rem; border: none; border-radius: 999px; cursor: pointer;
  background: transparent; font-size: .84rem; font-weight: 600; color: var(--fg-muted);
  transition: background .2s ease, color .2s ease;
}
.tab.is-active { background: var(--primary); color: var(--on-primary); }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip {
  padding: .35rem .85rem; border-radius: 999px; cursor: pointer; font-size: .8rem;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--fg-muted);
  transition: border-color .18s ease, color .18s ease, transform .18s ease;
}
.chip:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ── الأقسام والبطاقات ── */
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.section-alt { background: var(--surface-2); border-block: 1px solid var(--border); }
.section-head { max-width: 720px; margin-bottom: 2.25rem; }
.eyebrow {
  display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .08em;
  color: var(--accent); margin-bottom: .6rem;
}
.section-head h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); margin-bottom: .7rem; }
.section-head p { color: var(--fg-muted); font-size: 1rem; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow-sm);
}
.card-head {
  display: flex; align-items: center; gap: .5rem;
  font-size: .8rem; font-weight: 700; letter-spacing: .04em; color: var(--fg-muted);
  padding-bottom: .85rem; margin-bottom: 1.1rem; border-bottom: 1px solid var(--border);
}
/* ── الحقول ── */
.field { display: flex; flex-direction: column; gap: .45rem; margin-bottom: 1.1rem; }
.field > span, .field-label {
  display: flex; align-items: center; gap: .4rem;
  font-size: .82rem; font-weight: 600; color: var(--fg-muted);
}
.field-label { justify-content: space-between; gap: .5rem; }
.field em { color: var(--accent); font-style: normal; }
.field-label b { color: var(--fg); font-variant-numeric: tabular-nums; }
input[type="text"], input[type="email"], input[type="tel"], select, textarea {
  width: 100%; padding: .7rem .95rem; font-family: inherit; font-size: .95rem;
  color: var(--fg); background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-sm); outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
textarea { resize: vertical; line-height: 1.8; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: var(--ring); }
input.is-error, textarea.is-error, select.is-error { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: .78rem; line-height: 1.6; }
.check { display: flex; align-items: flex-start; gap: .6rem; font-size: .86rem; color: var(--fg-muted); cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: .3rem; accent-color: var(--accent); cursor: pointer; }
input[type="range"] { width: 100%; height: 22px; accent-color: var(--accent); cursor: pointer; background: transparent; }

/* ── الواجهة الرئيسية ── */
.hero { position: relative; padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(3rem, 6vw, 4rem); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset-inline-start: -10%; inset-block-start: -55%;
  width: 60%; height: 130%; pointer-events: none;
  background: radial-gradient(circle at 30% 20%, var(--accent-soft), transparent 62%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.hero h1 {
  font-size: clamp(2.1rem, 5.6vw, 3.6rem); line-height: 1.2; margin: 1rem 0 1rem;
  letter-spacing: 0;
}
.lede { color: var(--fg-muted); font-size: clamp(1rem, 1.6vw, 1.1rem); max-width: 60ch; margin-bottom: 1.75rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 2.25rem; }
.hero-stats {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem; padding-top: 1.5rem; border-top: 1px solid var(--border);
}
.hero-stats dt { font-family: var(--font-head); font-size: 1.75rem; font-weight: 700; color: var(--accent); }
.hero-stats dd { font-size: .82rem; color: var(--fg-muted); line-height: 1.5; }
.hero-card { position: relative; }
.sample-naskh { font-size: 1.35rem; margin-bottom: .9rem; }
.sample-body { color: var(--fg-muted); font-size: .95rem; margin-bottom: 1.25rem; }
.sample-list { list-style: none; display: flex; flex-direction: column; gap: .55rem; }
.sample-list li {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-size: .85rem; padding-block: .5rem; border-top: 1px dashed var(--border);
}
.sample-list li span { color: var(--fg-muted); }
.sample-list li strong { font-weight: 600; font-variant-numeric: tabular-nums; }

/* ── مختبر الحروف ── */
.letters-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 1.5rem; align-items: start; }
.letter-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  gap: .45rem; padding: 1.1rem; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
}
.letter-cell {
  aspect-ratio: 1; display: grid; place-items: center; cursor: pointer;
  font-family: var(--font-head); font-size: 1.5rem; font-weight: 600;
  color: var(--fg); background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: transform .16s ease, border-color .16s ease, background .16s ease, color .16s ease;
}
.letter-cell:hover { transform: translateY(-3px); border-color: var(--accent); color: var(--accent); }
.letter-cell.is-active { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
.letter-panel { position: sticky; top: 88px; }
.letter-panel-head { display: flex; align-items: center; gap: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
.letter-big {
  width: 74px; height: 74px; flex: none; display: grid; place-items: center;
  font-size: 2.6rem; line-height: 1; border-radius: var(--radius);
  background: var(--accent-soft); color: var(--accent);
}
.letter-name { font-family: var(--font-head); font-size: 1.15rem; font-weight: 700; }
.letter-hint { font-size: .8rem; color: var(--fg-muted); line-height: 1.6; }
.forms { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; }
.form-cell {
  padding: .8rem .6rem; text-align: center; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--border);
}
.form-glyph { font-family: var(--font-head); font-size: 2.1rem; line-height: 1.6; display: block; }
.form-tag { display: block; font-size: .74rem; color: var(--fg-muted); margin-top: .2rem; }

/* ── مختبر الطباعة ── */
.type-layout, .numbers-layout, .bidi-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 1.5rem; align-items: start; }
.controls .field:last-of-type { margin-bottom: 1rem; }
.type-sample {
  font-family: var(--font-head); font-size: 24px; line-height: 1.8; font-weight: 400;
  padding: 1.2rem; border-radius: var(--radius); background: var(--surface-2);
  border: 1px dashed var(--border-strong); direction: rtl; text-align: start;
  transition: font-size .15s ease, line-height .15s ease;
}
.type-sample-sub { margin-top: 1rem; font-size: .95rem; color: var(--fg-muted); line-height: 1.9; }
/* ── الأرقام والتواريخ ── */
.readout { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; }
.readout > div {
  padding: .7rem .8rem; border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px solid var(--border);
}
.readout span { display: block; font-size: .74rem; color: var(--fg-muted); }
.readout strong { font-size: 1rem; font-variant-numeric: tabular-nums; }
.date-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .7rem; margin-bottom: 1.25rem; }
.date-cell { padding: .8rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); }
.date-cell span { display: block; font-size: .74rem; color: var(--fg-muted); }
.date-cell strong { font-size: .95rem; }
.table { width: 100%; border-collapse: collapse; font-size: .86rem; }
.table th, .table td { padding: .6rem .7rem; text-align: start; border-bottom: 1px solid var(--border); }
.table th { font-size: .76rem; font-weight: 700; color: var(--fg-muted); background: var(--surface-2); }
.table tbody tr:last-child td { border-bottom: none; }
.num-cell { font-variant-numeric: tabular-nums; }

/* ── الاتجاه المزدوج ── */
.bidi-rows { display: flex; flex-direction: column; gap: .8rem; }
.bidi-row { padding: .85rem 1rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--border); }
.bidi-label {
  display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .05em;
  color: var(--accent); margin-bottom: .35rem; direction: ltr;
}
.bidi-text { font-size: .95rem; line-height: 1.9; overflow-wrap: anywhere; }
.bidi-meta {
  display: flex; flex-wrap: wrap; gap: 1.25rem; margin-top: 1.1rem;
  padding-top: .9rem; border-top: 1px solid var(--border);
  font-size: .8rem; color: var(--fg-muted);
}
.bidi-meta b { color: var(--fg); font-variant-numeric: tabular-nums; }
/* ── التشكيل ── */
.tashkeel-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.tashkeel-text {
  font-size: clamp(1.35rem, 3.2vw, 2rem); line-height: 2.4; padding: 1.5rem;
  border-radius: var(--radius); background: var(--surface-2); border: 1px dashed var(--border-strong);
}
.tashkeel-text.is-plain { line-height: 1.6; }
.marks { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.25rem; }
.mark {
  display: inline-flex; align-items: center; gap: .5rem; padding: .35rem .8rem;
  border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border);
  font-size: .8rem; color: var(--fg-muted);
}
.mark b { font-family: var(--font-head); font-size: 1.25rem; color: var(--accent); line-height: 1; }

/* ── النموذج ولوحة الفحص ── */
.form-layout { display: grid; grid-template-columns: 1.3fr .7fr; gap: 1.5rem; align-items: start; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1.1rem; }
.phone-group { display: flex; justify-content: flex-start; gap: .5rem; }
.phone-group select { width: auto; min-width: 132px; }
.form-foot { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 1.25rem; }
.form-hint { font-size: .8rem; color: var(--fg-muted); }
.form-hint em { color: var(--accent); font-style: normal; }
.check-list { list-style: none; display: flex; flex-direction: column; gap: .1rem; }
.check-list li {
  display: flex; align-items: flex-start; gap: .6rem; padding-block: .6rem;
  font-size: .86rem; border-bottom: 1px solid var(--border);
}
.check-list li:last-child { border-bottom: none; }
.check-list .icon { color: var(--success); margin-top: .35rem; }
.check-list small { display: block; color: var(--fg-muted); font-size: .78rem; line-height: 1.6; }
.checks-foot { margin-top: 1rem; font-size: .8rem; color: var(--fg-muted); line-height: 1.7; }
.spinner {
  width: 16px; height: 16px; border-radius: 50%; flex: none;
  border: 2px solid currentColor; border-top-color: transparent;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── التذييل ── */
.footer { background: var(--primary); color: var(--on-primary); padding: 3rem 0 1.5rem; margin-top: 1rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; }
.footer-brand { font-size: 1.4rem; margin-bottom: .6rem; }
.footer-note { font-size: .87rem; opacity: .72; line-height: 1.8; max-width: 44ch; }
.footer-title { font-size: .76rem; font-weight: 700; letter-spacing: .08em; opacity: .6; margin-bottom: .75rem; }
.footer nav a, .footer div > a, .footer-time { display: block; font-size: .87rem; opacity: .82; padding-block: .22rem; transition: opacity .2s ease; }
.footer a:hover { opacity: 1; text-decoration: underline; text-underline-offset: 4px; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(255, 255, 255, .16);
  font-size: .78rem; opacity: .7;
}
body.dark .footer-bottom { border-top-color: rgba(0, 0, 0, .16); }
/* ── التنبيهات ── */
.toast-wrap { position: fixed; inset-block-end: 1.25rem; inset-inline-start: 1.25rem; z-index: 90; display: flex; flex-direction: column; gap: .5rem; }
.toast {
  display: flex; align-items: center; gap: .55rem; padding: .75rem 1.1rem;
  border-radius: var(--radius-sm); font-size: .88rem; font-weight: 500;
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-lg);
  animation: toastIn .28s cubic-bezier(.16, 1, .3, 1);
}
.toast.success { border-color: var(--success); color: var(--success); }
.toast.error { border-color: var(--danger); color: var(--danger); }
@keyframes toastIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ── الحركة والدخول ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fadeUp .55s cubic-bezier(.16, 1, .3, 1) both; }
.delay-2 { animation-delay: .14s; }
.reveal { opacity: 0; transform: translateY(20px); }
.reveal.is-visible { animation: fadeUp .6s cubic-bezier(.16, 1, .3, 1) both; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
}
/* ── الاستجابة ── */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .menu-btn { display: grid; }
  .hero-grid, .letters-layout, .type-layout, .numbers-layout, .bidi-layout, .form-layout {
    grid-template-columns: 1fr;
  }
  .letter-panel { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .container, .nav-inner { padding-inline: 1.1rem; }
  .brand-text em { display: none; }
  .hero-stats { grid-template-columns: 1fr; gap: .5rem; }
  .hero-stats > div { display: flex; align-items: baseline; gap: .6rem; }
  .form-grid, .readout, .date-grid { grid-template-columns: 1fr; }
  .phone-group { flex-direction: column; }
  .phone-group select { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .tashkeel-head { align-items: flex-start; }
  .toast-wrap { inset-inline: 1rem; }
}