/* ============================================================
   khawatmi.de — "Chromatic Meridian" observatory plate (RTL / عربي)
   v=p9 — v2 Phase A+B: plate frame, FIG numbering, meridian hero
   ============================================================ */

:root {
  /* ---- palette | الألوان ---- */
  --bg:        #0a0c12;
  --bg-2:      #0f1320;
  --surface:   rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border:    rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.17);
  --text:      #e8ecf4;
  --muted:     #98a1b3;
  --accent:    #6ee7ff;   /* سماوي */
  --accent-2:  #a78bfa;   /* بنفسجي */
  --accent-3:  #f472b6;   /* وردي */

  /* semantic tokens (theme-aware) | رموز دلالية حسب الثيم */
  --text-soft:      #c3cad8;                 /* about paragraphs */
  --accent-ink:     var(--accent);           /* accent used as TEXT color */
  --grad-a:         #6ee7ff;                 /* gradient TEXT stops (AA per theme) */
  --grad-b:         #a78bfa;
  --grad-c:         #f472b6;
  --nav-bg:         rgba(10, 12, 18, 0.55);
  --nav-bg-scroll:  rgba(10, 12, 18, 0.80);
  --grid-line:      rgba(255, 255, 255, 0.028);
  --ring-line:      rgba(255, 255, 255, 0.18);
  --star:          160, 190, 255;            /* starfield RGB (used in rgba) */
  /* meridian instrument (theme-aware) | آلة الزوال */
  --mer-star:       rgba(210, 220, 255, 0.72);   /* meridian starfield dots */
  --mer-star-faint: rgba(210, 220, 255, 0.34);
  --mer-tick-off:   rgba(255, 255, 255, 0.16);   /* uncoloured (bottom-arc) ticks */
  --cov-dot:        rgba(255, 255, 255, 0.15);   /* project cover pattern */
  --cov-txt-l:      70%;                     /* project cover initial lightness */

  /* ---- elevation | الظلال ---- */
  --glow:      0 0 40px rgba(110, 231, 255, 0.25);
  --shadow-1:  0 2px 12px rgba(2, 6, 16, 0.30);
  --shadow-2:  0 16px 44px rgba(2, 6, 16, 0.40);

  /* ---- type scale | مقياس الخط ---- */
  --fs-display: clamp(2.5rem, 5.5vw, 4rem);
  --fs-h2:      clamp(1.7rem, 3.4vw, 2.4rem);
  --fs-h3:      1.18rem;
  --fs-lead:    1.11rem;
  --fs-body:    1rem;
  --fs-sm:      0.92rem;
  --fs-xs:      0.8rem;

  /* ---- spacing (4/8 rhythm) | المسافات ---- */
  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;
  --sect-pad: clamp(72px, 9vw, 112px);

  /* ---- radius scale | الانحناءات ---- */
  --r-sm: 12px;   /* buttons, inputs, tags-box */
  --r-md: 16px;   /* icon boxes, socials */
  --r-lg: 20px;   /* cards */
  --r-xl: 28px;   /* contact box, portrait */

  /* ---- motion | الحركة ---- */
  --dur-1: 150ms; --dur-2: 260ms; --dur-3: 420ms;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:  cubic-bezier(0.4, 0, 1, 1);

  --maxw:      1080px;
  --font-en:   "Inter", system-ui, sans-serif;
  --font-ar:   "IBM Plex Sans Arabic", system-ui, sans-serif;
  --mono:      "Space Grotesk", ui-monospace, monospace;
  color-scheme: dark;
}

/* ============ Light theme = "paper plate" | لوحة ورقية ============ */
/* نفس الهندسة، لكن حبر داكن على ورق دافئ | same geometry, dark ink on warm paper */
:root[data-theme="light"] {
  --bg:        #f5f2ec;                        /* warm paper */
  --bg-2:      #ece7dd;                        /* deckle edge */
  --surface:   rgba(255, 253, 248, 0.78);
  --surface-2: rgba(255, 254, 250, 0.97);
  --border:    rgba(28, 22, 14, 0.14);
  --border-strong: rgba(28, 22, 14, 0.26);
  --text:      #1b160f;                        /* warm near-black ink */
  --muted:     #5b5347;
  --text-soft:      #3a342a;
  --accent-ink:     #0e7196;                  /* deeper cyan ink, legible on paper */
  --grad-a:         #0c6f93;                  /* muted spectrum, kept AA as TEXT */
  --grad-b:         #6d28d9;
  --grad-c:         #be185d;
  --nav-bg:         rgba(245, 242, 236, 0.74);
  --nav-bg-scroll:  rgba(245, 242, 236, 0.95);
  --grid-line:      rgba(28, 22, 14, 0.05);
  --ring-line:      rgba(28, 22, 14, 0.20);
  --star:          70, 62, 50;
  --cov-dot:        rgba(28, 22, 14, 0.16);
  --cov-txt-l:      36%;
  --mer-star:       rgba(50, 44, 34, 0.62);
  --mer-star-faint: rgba(50, 44, 34, 0.30);
  --mer-tick-off:   rgba(28, 22, 14, 0.20);
  --glow:      0 0 34px rgba(14, 113, 150, 0.20);
  --shadow-1:  0 2px 10px rgba(40, 32, 20, 0.08);
  --shadow-2:  0 16px 40px rgba(40, 32, 20, 0.14);
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  /* يمنع التمايل الأفقي عند التمرير على الجوال | stop sideways rubber-band on mobile */
  overscroll-behavior-x: none;
}
/* الأقسام تنزلق تحت الشريط الثابت | anchored sections clear the fixed navbar */
section, main { scroll-margin-top: 88px; }
html.menu-open { overflow: hidden; }

body {
  font-family: var(--font-en);
  font-size: var(--fs-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  width: 100%;
  overflow-x: hidden;
  overscroll-behavior-x: none;
  -webkit-font-smoothing: antialiased;
  /* لا مؤشّر كتابة عند النقر خارج الحقول | no text caret outside form fields */
  caret-color: transparent;
  -webkit-tap-highlight-color: transparent;
}
body.ar {
  font-family: var(--font-ar);
  /* عناصر الـ mono تسقط على خط عربي مناسب | mono elements fall back to Arabic face */
  --mono: "Space Grotesk", "IBM Plex Sans Arabic", system-ui, sans-serif;
}
input, textarea { caret-color: var(--accent-ink); }

/* رابط تخطّي التنقل | skip to content (keyboard users) */
.skip-link {
  position: fixed; top: 10px; inset-inline-start: 10px; z-index: 100;
  background: var(--bg-2); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: var(--r-sm);
  padding: 10px 18px; font-weight: 600; text-decoration: none;
  transform: translateY(-220%); transition: transform var(--dur-1) var(--ease-out);
}
.skip-link:focus { transform: none; }

/* خلفية متحركة | animated background layers */
.bg-canvas {
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(900px 600px at 85% -5%, rgba(167,139,250,0.16), transparent 60%),
    radial-gradient(800px 600px at 0% 10%, rgba(110,231,255,0.14), transparent 55%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
}
.grid-overlay {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}
/* ---------- layout ---------- */
/* ملاحظة: نستخدم padding-inline/padding-block حتى لا يتضارب .wrap مع أبعاد القسم
   note: logical props so .wrap's inline padding never overrides section block padding */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: 22px; }
main { counter-reset: fig; }              /* ترقيم الأشكال FIG. 0N | figure numbering */
section { padding-block: var(--sect-pad); position: relative; }

/* ---------- navbar ---------- */
header.nav {
  position: fixed; top: 0; inset-inline: 0; z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-2), background var(--dur-2);
}
header.nav.scrolled { border-bottom-color: var(--border); background: var(--nav-bg-scroll); }
.nav-inner { display: flex; align-items: center; justify-content: space-between;
  max-width: var(--maxw); margin: 0 auto; padding: 14px 22px; }
.logo {
  font-family: var(--mono); font-weight: 700; font-size: 1.15rem;
  letter-spacing: 1px; display: inline-flex; align-items: center; gap: 8px;
  color: var(--text); text-decoration: none;
}
.logo .dot { width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent); box-shadow: var(--glow); animation: pulse 2s infinite; }
.nav-right { display: flex; align-items: center; gap: var(--sp-4); }
.nav-links { display: flex; gap: 26px; margin-inline-end: var(--sp-2); }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: .95rem;
  position: relative; transition: color var(--dur-2);
}
.nav-links a::after {
  content: ""; position: absolute; bottom: -6px; inset-inline-start: 0;
  width: 0; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width var(--dur-2) var(--ease-out);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
/* الرابط النشط حسب التمرير | scrollspy active state */
.nav-links a.active { color: var(--text); }
.nav-links a.active::after { width: 100%; }

.lang-toggle {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  font-family: var(--mono); font-size: .85rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--border);
  padding: 7px 13px; border-radius: 999px; min-height: 38px;
  transition: background var(--dur-2), border-color var(--dur-2), transform var(--dur-1);
}
.lang-toggle:hover { background: var(--surface-2); border-color: var(--accent); transform: translateY(-1px); }
.lang-toggle svg { width: 16px; height: 16px; }
/* theme toggle (icon-only) | زر تبديل الثيم */
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center; cursor: pointer;
  width: 38px; height: 38px; color: var(--text);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 999px;
  transition: background var(--dur-2), border-color var(--dur-2), transform var(--dur-1);
}
.icon-btn:hover { background: var(--surface-2); border-color: var(--accent); transform: translateY(-1px); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn .i-moon { display: none; }
:root[data-theme="light"] .icon-btn .i-sun  { display: none; }
:root[data-theme="light"] .icon-btn .i-moon { display: inline; }

/* زر القائمة للجوال | mobile burger (hidden on desktop) */
.burger { display: none; position: relative; z-index: 60; }
.burger span {
  position: absolute; left: 50%; width: 16px; height: 2px; border-radius: 2px;
  background: currentColor; transform: translateX(-50%);
  transition: transform var(--dur-2) var(--ease-out), opacity var(--dur-2);
}
.burger span:nth-child(1) { top: 13px; }
.burger span:nth-child(2) { top: 18px; }
.burger span:nth-child(3) { top: 23px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateX(-50%) translateY(5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateX(-50%) translateY(-5px) rotate(-45deg); }

/* لوحة التنقل للجوال | mobile nav sheet */
.mnav {
  position: fixed; inset: 0; z-index: 45;
  display: grid; place-items: center;
  background: var(--nav-bg-scroll);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-2) var(--ease-out), visibility var(--dur-2);
}
.mnav.open { opacity: 1; visibility: visible; }
.mnav ul { list-style: none; display: flex; flex-direction: column; gap: var(--sp-5); text-align: center; }
.mnav a {
  color: var(--text); text-decoration: none;
  font-size: 1.5rem; font-weight: 700; letter-spacing: .3px;
  display: inline-block; padding: var(--sp-2) var(--sp-5);
  border-radius: var(--r-sm);
  transform: translateY(14px); opacity: 0;
  transition: transform var(--dur-3) var(--ease-out), opacity var(--dur-3) var(--ease-out),
              color var(--dur-2), background var(--dur-2);
}
.mnav.open a { transform: none; opacity: 1; }
.mnav a:hover { color: var(--accent-ink); background: var(--surface); }

/* ---------- hero ---------- */
.hero { min-height: 100vh; min-height: 100dvh; display: flex; align-items: center;
  padding-block: 110px 96px; }
.hero-grid { display: grid; grid-template-columns: 1.25fr .9fr; gap: var(--sp-7);
  align-items: center; width: 100%; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: var(--fs-xs); font-weight: 600; color: var(--accent-ink);
  border: 1px solid var(--border); background: var(--surface);
  padding: 6px 14px; border-radius: 999px; margin-bottom: var(--sp-5);
}
.badge .live { width: 7px; height: 7px; border-radius: 50%;
  background: #10b981; box-shadow: 0 0 10px #10b981; animation: pulse 1.6s infinite; }
.hero h1 {
  font-size: var(--fs-display); line-height: 1.15; font-weight: 700;
  letter-spacing: -0.5px; margin-bottom: var(--sp-4);
}
body.ar .hero h1 { letter-spacing: 0; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--grad-a), var(--grad-b) 55%, var(--grad-c));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% auto; animation: shine 6s linear infinite;
}
.hero .role { font-size: 1.25rem; color: var(--muted); margin-bottom: var(--sp-2); }
.typed-line {
  font-family: var(--mono); font-size: 1.12rem; color: var(--accent-ink);
  min-height: 1.9em; margin-bottom: var(--sp-6);
}
body.ar .typed-line { font-family: var(--font-ar); }
.typed-line .cursor {
  display: inline-block; width: 2px; height: 1.1em; vertical-align: -0.15em;
  background: var(--accent); margin-inline-start: 3px; animation: blink 1s steps(1) infinite;
}
.hero-cta { display: flex; gap: var(--sp-4); flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 12px 24px; border-radius: var(--r-sm); font-size: .98rem; font-weight: 600;
  text-decoration: none; cursor: pointer; border: 1px solid var(--border);
  transition: transform var(--dur-1) var(--ease-out), box-shadow var(--dur-2), background var(--dur-2), border-color var(--dur-2);
}
.btn.primary {
  color: #06121a; border: none;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: var(--glow);
}
.btn.primary:hover { transform: translateY(-2px); box-shadow: 0 0 55px rgba(110,231,255,.4); }
.btn.ghost { color: var(--text); background: var(--surface); }
.btn.ghost:hover { transform: translateY(-2px); background: var(--surface-2); border-color: var(--accent); }
.btn:active { transform: translateY(0) scale(.98); }

/* ---------- hero meridian instrument | آلة الزوال في الهيرو ----------
   عجلة الطيف (SVG) يبنيها main.js وتحلّ محلّ صورة البورتريه.
   the spectral meridian wheel (SVG) is built by main.js, replacing the portrait. */
.meridian-wrap { display: flex; flex-direction: column; align-items: center; gap: var(--sp-3); }
.meridian { width: min(440px, 86vw); aspect-ratio: 1; }
.meridian svg { width: 100%; height: 100%; display: block; overflow: visible; }
/* soft chromatic bloom behind the wheel | توهّج طيفي خافت خلف العجلة */
.meridian-wrap { position: relative; }
.meridian-wrap::before {
  content: ""; position: absolute; inset: 8% 8% 22%; z-index: -1; border-radius: 50%;
  background: radial-gradient(circle, rgba(167,139,250,.16), transparent 68%);
  filter: blur(26px);
}
.mer-cap {
  font-family: var(--mono); font-size: var(--fs-xs); letter-spacing: 3px;
  color: var(--muted); text-transform: uppercase; opacity: .8;
  direction: ltr; unicode-bidi: isolate;
}

/* عناصر عجلة الزوال — تتبع الثيم عبر المتغيّرات | wheel parts follow theme via vars */
.mer-ring   { fill: none; stroke: var(--ring-line); stroke-width: 1; }
.mer-ring.faint { opacity: .5; }
.mer-ring.dash  { stroke-dasharray: 2 7; opacity: .8; }
.mer-cross  { stroke: var(--muted); stroke-width: 1; opacity: .55; }
.mer-hub    { fill: var(--accent-ink); }
.mer-label  { fill: var(--muted); font-family: var(--mono); font-size: 9px;
  letter-spacing: .6px; opacity: .72; }
.mer-toff   { stroke: var(--mer-tick-off); }   /* شرطات القوس السفلي المحايدة | neutral bottom-arc ticks */
.mer-star   { fill: var(--mer-star); }
.mer-star.faint { fill: var(--mer-star-faint); }
.mer-star.alpha { fill: var(--accent); }
.mer-alpha  { fill: var(--accent-ink); font-family: var(--mono); font-size: 9px; }
.mer-const  { fill: none; stroke: var(--accent-2); stroke-width: 1; opacity: .26;
  stroke-linejoin: round; stroke-linecap: round; }
.mer-photo-ring { fill: none; stroke: var(--ring-line); stroke-width: 1.5; }

/* مؤشّر تمرير في نهاية الهيرو | scroll cue */
.scroll-cue {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 999px;
  color: var(--muted); border: 1px solid var(--border); background: var(--surface);
  transition: color var(--dur-2), border-color var(--dur-2), transform var(--dur-1);
  animation: cue-bob 2.4s ease-in-out infinite;
}
.scroll-cue:hover { color: var(--accent-ink); border-color: var(--accent); }
.scroll-cue svg { width: 16px; height: 16px; }
@media (max-height: 640px) { .scroll-cue { display: none; } }

/* ---------- section heading = plate figure | ترويسة القسم = شكل مرقّم ---------- */
.sec-head { margin-bottom: var(--sp-7); counter-increment: fig; }
/* الترويسة تحمل رقم الشكل عبر عدّاد CSS؛ يبقى "FIG." لاتينياً/تقنياً في كل اللغات
   the kicker carries its figure number via a CSS counter; "FIG." stays Latin/technical */
.sec-head .kicker {
  font-family: var(--mono); color: var(--accent-ink); font-size: var(--fs-xs);
  font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
  display: flex; align-items: center; gap: 10px; margin-bottom: var(--sp-3);
  /* الترويسة تتبع اتجاه اللغة (يمين بالعربية)، لكن "FIG. 0N" يبقى LTR بعزل bidi
     the kicker follows text direction (right in Arabic), while "FIG. 0N" stays LTR via bidi isolation */
  unicode-bidi: isolate;
}
.sec-head .kicker::before {
  content: "FIG. " counter(fig, decimal-leading-zero);
  color: var(--accent-ink);
}
/* شرطة قياس رفيعة تلي رقم الشكل | a thin measure-rule trailing the figure number */
.sec-head .kicker::after {
  content: ""; flex: 0 0 34px; height: 1px; background: var(--border-strong);
}
body.ar .sec-head .kicker { letter-spacing: 1px; }
.sec-head h2 { font-size: var(--fs-h2); font-weight: 700; line-height: 1.2; letter-spacing: -0.3px; }
body.ar .sec-head h2 { letter-spacing: 0; }
.sec-head .bar { width: 64px; height: 3px; border-radius: 3px; margin-top: var(--sp-4);
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b) 60%, var(--grad-c)); }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: 1fr; gap: var(--sp-5); max-width: 70ch; }
.about-grid p { color: var(--text-soft); font-size: var(--fs-lead); }
.about-grid p:first-child { font-size: 1.2rem; }

/* ---------- cards / skills ---------- */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: var(--sp-5); }
.card {
  position: relative; padding: var(--sp-6) var(--sp-5); border-radius: var(--r-lg);
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-1); overflow: hidden;
  transition: transform var(--dur-2) var(--ease-out), border-color var(--dur-2),
              background var(--dur-2), box-shadow var(--dur-2);
}
.card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity var(--dur-3);
  background: radial-gradient(360px circle at var(--mx,50%) var(--my,0%),
    rgba(110,231,255,.12), transparent 45%);
  pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: rgba(110,231,255,.35);
  background: var(--surface-2); box-shadow: var(--shadow-2); }
.card:hover::before { opacity: 1; }
.card .ico {
  width: 52px; height: 52px; display: grid; place-items: center; font-size: 1.6rem;
  border-radius: var(--r-md); margin-bottom: var(--sp-4); color: var(--accent-ink);
  background: linear-gradient(135deg, rgba(110,231,255,.14), rgba(167,139,250,.14));
  border: 1px solid var(--border);
}
.card .ico svg { width: 26px; height: 26px; }
.card h3 { font-size: var(--fs-h3); margin-bottom: var(--sp-2); }
.card p { color: var(--muted); font-size: var(--fs-sm); }

/* ---------- projects ---------- */
.proj-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--sp-5); }
.proj {
  display: flex; flex-direction: column; border-radius: var(--r-lg); overflow: hidden;
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-1);
  transition: transform var(--dur-2) var(--ease-out), border-color var(--dur-2),
              background var(--dur-2), box-shadow var(--dur-2);
}
.proj:hover { transform: translateY(-4px); border-color: rgba(110,231,255,.35);
  background: var(--surface-2); box-shadow: var(--shadow-2); }
.proj-img { aspect-ratio: 16 / 10; overflow: hidden; background: var(--bg-2); }
.proj-img img { width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform var(--dur-3) var(--ease-out); }
.proj:hover .proj-img img { transform: scale(1.04); }

/* غلاف مولّد للمشاريع بلا صورة | generated cover for imageless projects */
.proj-cover {
  position: relative; aspect-ratio: 16 / 10; overflow: hidden;
  display: grid; place-items: center;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(120% 90% at 18% 12%, hsl(var(--cov-h, 190) 65% 55% / .30), transparent 55%),
    radial-gradient(120% 90% at 85% 82%, hsl(calc(var(--cov-h, 190) + 70) 65% 55% / .26), transparent 55%),
    var(--bg-2);
}
.proj-cover::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(var(--cov-dot) 1px, transparent 1.4px);
  background-size: 20px 20px;
  mask-image: radial-gradient(circle at 50% 45%, #000, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at 50% 45%, #000, transparent 80%);
}
.cov-initial {
  position: relative; font-family: var(--mono); font-weight: 700;
  font-size: clamp(2.4rem, 5vw, 3.2rem); line-height: 1;
  background: linear-gradient(120deg,
    hsl(var(--cov-h, 190) 72% var(--cov-txt-l)),
    hsl(calc(var(--cov-h, 190) + 70) 72% var(--cov-txt-l)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  transition: transform var(--dur-3) var(--ease-out);
}
.proj:hover .cov-initial { transform: translateY(-3px) scale(1.04); }

.proj-body { padding: var(--sp-5) var(--sp-5) var(--sp-5); display: flex; flex-direction: column;
  gap: var(--sp-3); flex: 1; }
.proj-body h3 { font-size: var(--fs-h3); }
.proj-body p { color: var(--muted); font-size: var(--fs-sm); }
.proj-tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: 2px; }
.proj-tags .tag {
  font-family: var(--mono); font-size: .72rem; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
  color: var(--accent-ink); background: var(--surface-2); border: 1px solid var(--border);
}
.proj-link {
  margin-top: auto; padding-top: var(--sp-2); align-self: flex-start;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: .88rem; font-weight: 600;
  color: var(--accent-ink); text-decoration: none;
}
.proj-link .arr { display: inline-block; transition: transform var(--dur-2) var(--ease-out); }
.proj-link:hover .arr { transform: translate(3px, -3px); }
body.ar .proj-link:hover .arr { transform: translate(-3px, -3px); }
.proj-link:hover { text-decoration: underline; text-underline-offset: 4px; }

/* ---------- stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: var(--sp-4); }
.stat {
  text-align: center; padding: var(--sp-6) var(--sp-4); border-radius: var(--r-lg);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow-1);
}
.stat .num {
  font-family: var(--mono); font-size: 2.6rem; font-weight: 700; line-height: 1;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, var(--grad-a), var(--grad-b));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .lbl { color: var(--muted); margin-top: var(--sp-2); font-size: var(--fs-sm); }

/* ---------- contact ---------- */
.contact-box {
  text-align: center; max-width: 640px; margin: 0 auto;
  padding: var(--sp-8) var(--sp-6); border-radius: var(--r-xl);
  background: linear-gradient(135deg, rgba(110,231,255,.06), rgba(167,139,250,.06));
  border: 1px solid var(--border); box-shadow: var(--shadow-1);
}
:root[data-theme="light"] .contact-box {
  background: linear-gradient(135deg, rgba(14,122,166,.07), rgba(109,40,217,.06));
}
.contact-box > p { color: var(--muted); margin: var(--sp-3) 0 var(--sp-6); }
/* contact form */
.cform { display: flex; flex-direction: column; gap: var(--sp-4); max-width: 480px; margin: 6px auto 0; text-align: start; }
.cf-field { display: flex; flex-direction: column; gap: 6px; }
.cf-field label { font-size: var(--fs-sm); font-weight: 600; color: var(--text-soft); }
.cform input, .cform textarea {
  width: 100%; background: var(--surface); border: 1px solid var(--border); color: var(--text);
  border-radius: var(--r-sm); padding: 12px 14px; font-family: var(--font-en); font-size: 1rem;
  transition: border-color var(--dur-2), background var(--dur-2), box-shadow var(--dur-2);
}
body.ar .cform input, body.ar .cform textarea { font-family: var(--font-ar); }
.cform input::placeholder, .cform textarea::placeholder { color: var(--muted); opacity: .75; }
.cform input:focus, .cform textarea:focus {
  outline: none; border-color: var(--accent-ink); background: var(--surface-2);
  box-shadow: 0 0 0 3px rgba(110, 231, 255, .18);
}
:root[data-theme="light"] .cform input:focus, :root[data-theme="light"] .cform textarea:focus {
  box-shadow: 0 0 0 3px rgba(14, 122, 166, .18);
}
.cform textarea { resize: vertical; min-height: 112px; line-height: 1.6; }
.cform .cf-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.cform button { align-self: flex-start; margin-top: 2px; }
body.ar .cform button { align-self: flex-end; }
.cf-status { min-height: 1.2em; font-size: .9rem; text-align: start; }
.cf-status.ok { color: #10b981; }
:root[data-theme="light"] .cf-status.ok { color: #047857; }
.cf-status.err { color: var(--accent-3); }
:root[data-theme="light"] .cf-status.err { color: #be185d; }
.socials { display: flex; justify-content: center; gap: var(--sp-4); flex-wrap: wrap; margin-top: var(--sp-6); }
.soc {
  width: 50px; height: 50px; display: grid; place-items: center;
  border-radius: var(--r-md); background: var(--surface); border: 1px solid var(--border);
  color: var(--text);
  transition: transform var(--dur-2) var(--ease-out), background var(--dur-2), border-color var(--dur-2), color var(--dur-2);
}
.soc:hover { transform: translateY(-4px); background: var(--surface-2);
  border-color: var(--accent); color: var(--accent-ink); }
.soc:active { transform: translateY(-1px); }
.soc svg { width: 22px; height: 22px; }

/* ---------- footer ---------- */
footer.foot { padding: var(--sp-6) 0; text-align: center; color: var(--muted);
  border-top: 1px solid var(--border); font-size: var(--fs-sm); }

/* ---------- reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px);
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
  transition-delay: var(--rvd, 0ms); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- keyframes ---------- */
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.35} }
@keyframes blink { 50% { opacity: 0; } }
@keyframes shine { to { background-position: 200% center; } }
@keyframes float { 0%,100%{ transform: translateY(0) } 50%{ transform: translateY(-8px) } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes cue-bob { 0%,100%{ transform: translate(-50%, 0) } 50%{ transform: translate(-50%, 6px) } }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; gap: var(--sp-6); }
  .hero { padding-block: 96px 72px; }
  .hero-cta { justify-content: center; }
  .badge { margin-inline: auto; }
  .meridian-wrap { order: -1; }
  .meridian { width: min(300px, 76vw); }
  .nav-links { display: none; }        /* الروابط تنتقل لقائمة الجوال | links move into the sheet */
  .burger { display: inline-flex; }
  .about-grid p:first-child { font-size: var(--fs-lead); }
  .cform button { align-self: stretch; }
  body.ar .cform button { align-self: stretch; }
}
@media (max-width: 480px) {
  .wrap { padding-inline: 18px; }
  .nav-inner { padding-inline: 16px; }
  .contact-box { padding: var(--sp-7) var(--sp-4); }
  .stats { grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- a11y: visible keyboard focus | إظهار تركيز لوحة المفاتيح ---------- */
:focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 3px; border-radius: 8px; }
a:focus:not(:focus-visible), button:focus:not(:focus-visible) { outline: none; }
img { max-width: 100%; height: auto; }