/* ==========================================================
   Concrete Towers — tokens, reset, shared components
   All spacing uses logical properties so RTL/LTR both work.
   ========================================================== */
:root {
  --blue-700: #004c97;
  --blue-600: #0a5cb3;
  --blue-500: #1d74d6;
  --blue-100: #e3eefb;
  --navy-900: #0f172a;
  --navy-800: #16213a;
  --navy-700: #1e2b47;
  --slate-600: #475569;
  --slate-500: #5b6b82;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-50: #f8fafc;
  --white: #ffffff;
  --concrete: #d7dbe0;

  --font-display: "Readex Pro", "IBM Plex Sans Arabic", system-ui, sans-serif;
  --font-body: "IBM Plex Sans Arabic", "Readex Pro", system-ui, sans-serif;

  --text-sm: 0.875rem;
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.1rem, 1rem + 0.4vw, 1.25rem);
  --text-h3: clamp(1.15rem, 1.05rem + 0.4vw, 1.3rem);
  --text-h2: clamp(1.75rem, 1.2rem + 2.2vw, 2.75rem);
  --text-hero: clamp(2.25rem, 1.2rem + 4.6vw, 4.75rem);

  --space-section: clamp(4rem, 2.8rem + 5vw, 7.5rem);
  --gutter: clamp(1rem, 0.5rem + 2vw, 2rem);
  --container: 1240px;
  --header-h: 76px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgb(15 23 42 / 0.06), 0 1px 3px rgb(15 23 42 / 0.08);
  --shadow-md: 0 10px 30px -12px rgb(15 23 42 / 0.25);
  --shadow-lg: 0 30px 60px -20px rgb(15 23 42 / 0.45);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 160ms;
  --dur: 320ms;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.75;
  color: var(--navy-900);
  background: var(--white);
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
html[lang="en"] body { line-height: 1.65; }
img, picture, svg { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.25; font-weight: 700; }

:focus-visible { outline: 3px solid var(--blue-500); outline-offset: 3px; border-radius: 4px; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; inset-inline-start: 1rem; top: -100px; z-index: 100;
  padding: 0.75rem 1.25rem; background: var(--blue-700); color: var(--white);
  border-radius: var(--radius-sm); font-weight: 600;
}
.skip-link:focus { top: 1rem; }

.container { width: min(100% - 2 * var(--gutter), var(--container)); margin-inline: auto; }
.section { padding-block: var(--space-section); }

/* ---------- typography helpers ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600;
  letter-spacing: 0.02em; color: var(--blue-700); margin-block-end: 0.9rem;
}
.eyebrow::before { content: ""; width: 28px; height: 3px; background: currentColor; border-radius: 2px; }
.eyebrow-light { color: #9cc7f5; }
.section-title { font-size: var(--text-h2); letter-spacing: -0.01em; text-wrap: balance; }
html[lang="en"] .section-title, html[lang="en"] .hero-title { letter-spacing: -0.025em; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  min-height: 44px; padding: 0.7rem 1.4rem; border-radius: var(--radius-sm);
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  border: 2px solid transparent; white-space: nowrap;
  transition: background-color var(--dur-fast), color var(--dur-fast), border-color var(--dur-fast),
              transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast);
}
.btn:active { transform: translateY(1px) scale(0.98); }
.btn-sm { min-height: 40px; padding: 0.45rem 1rem; font-size: 0.875rem; }
.btn-lg { min-height: 52px; padding: 0.85rem 1.8rem; font-size: 1rem; }
.btn-primary { background: var(--blue-700); color: var(--white); box-shadow: 0 8px 20px -8px rgb(0 76 151 / 0.7); }
.btn-primary:hover { background: var(--blue-600); box-shadow: 0 12px 26px -8px rgb(0 76 151 / 0.8); }
.btn-outline-light { border-color: rgb(255 255 255 / 0.75); color: var(--white); background: rgb(255 255 255 / 0.04); backdrop-filter: blur(4px); }
.btn-outline-light:hover { background: var(--white); color: var(--navy-900); border-color: var(--white); }

.text-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-display); font-weight: 600; font-size: 0.925rem; color: var(--blue-700);
}
.text-link svg { width: 18px; height: 18px; transition: transform var(--dur) var(--ease-out); }
[dir="rtl"] .text-link svg, [dir="rtl"] .i-flip { transform: scaleX(-1); }
.text-link:hover svg { transform: translateX(4px); }
[dir="rtl"] .text-link:hover svg { transform: scaleX(-1) translateX(4px); }

/* ---------- header ---------- */
.site-header {
  position: fixed; inset-inline: 0; top: 0; z-index: 50; height: var(--header-h);
  background: rgb(255 255 255 / 0.72);
  backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid rgb(15 23 42 / 0.06);
  transition: box-shadow var(--dur), background-color var(--dur);
}
.site-header.is-scrolled { background: rgb(255 255 255 / 0.9); box-shadow: var(--shadow-md); }
.header-inner { height: 100%; display: flex; align-items: center; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; flex-shrink: 0; }
.brand img { width: 60px; height: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-family: var(--font-display); font-size: 1.1rem; color: var(--navy-900); }
.brand-text small { font-size: 0.72rem; color: var(--slate-500); letter-spacing: 0.04em; direction: ltr; text-align: start; }

.main-nav { margin-inline-start: auto; }
.main-nav ul { display: flex; gap: 0.25rem; }
.main-nav a {
  position: relative; display: block; padding: 0.55rem 0.85rem; border-radius: var(--radius-sm);
  font-family: var(--font-display); font-weight: 500; font-size: 0.95rem; color: var(--navy-700);
  transition: color var(--dur-fast), background-color var(--dur-fast);
}
.main-nav a::after {
  content: ""; position: absolute; inset-inline: 0.85rem; bottom: 0.25rem; height: 2px;
  background: var(--blue-700); transform: scaleX(0); transition: transform var(--dur) var(--ease-out);
}
.main-nav a:hover { color: var(--blue-700); background: var(--blue-100); }
.main-nav a.is-active { color: var(--blue-700); }
.main-nav a.is-active::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 0.6rem; }
.lang-toggle {
  display: inline-flex; align-items: center; gap: 0.35rem; min-height: 40px; padding: 0.4rem 0.75rem;
  border: 1.5px solid var(--slate-300); border-radius: var(--radius-sm); background: var(--white);
  font-family: var(--font-display); font-weight: 600; font-size: 0.85rem;
  transition: border-color var(--dur-fast), color var(--dur-fast);
}
.lang-toggle svg { width: 18px; height: 18px; }
.lang-toggle:hover { border-color: var(--blue-700); color: var(--blue-700); }

.nav-toggle {
  display: none; width: 44px; height: 44px; padding: 0; border: 0; background: transparent;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--navy-900); border-radius: 2px; transition: transform var(--dur), opacity var(--dur); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    position: fixed; inset-inline: 0; top: var(--header-h); margin: 0;
    background: rgb(255 255 255 / 0.97); backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--slate-200); box-shadow: var(--shadow-md);
    clip-path: inset(0 0 100% 0); visibility: hidden;
    transition: clip-path var(--dur) var(--ease-out), visibility 0s linear var(--dur);
  }
  .main-nav.is-open { clip-path: inset(0 0 0 0); visibility: visible; transition-delay: 0s; }
  .main-nav ul { flex-direction: column; padding: 0.75rem var(--gutter) 1.25rem; }
  .main-nav a { padding: 0.85rem 0.5rem; font-size: 1.05rem; border-bottom: 1px solid var(--slate-200); border-radius: 0; }
  .main-nav a::after { display: none; }
  .header-actions { margin-inline-start: auto; }
}
@media (max-width: 520px) {
  .header-cta { display: none; }
  .brand-text small { display: none; }
  .brand img { width: 50px; }
}

/* ---------- reveal on scroll ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.js .reveal.is-visible { opacity: 1; transform: none; }

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