/* ============================================
   ALHYDA DESIGN SYSTEM — BASE CSS
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@300;400;500;700;800;900&family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- Font Awesome 6 ---------- */
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* — Teal (Company) — */
  --teal-50:  #E0F7F5;
  --teal-100: #B3EDE8;
  --teal-200: #80E0D9;
  --teal-300: #4DD3CA;
  --teal-400: #26C9BE;
  --teal-500: #00A99D;
  --teal-600: #009B90;
  --teal-700: #007D75;
  --teal-800: #00655E;
  --teal-900: #003D39;

  /* — Purple (Institute) — */
  --purple-50:  #F0E6F6;
  --purple-100: #D9BFE9;
  --purple-200: #C095DB;
  --purple-300: #A76BCD;
  --purple-400: #944BC2;
  --purple-500: #5B2D8E;
  --purple-600: #512882;
  --purple-700: #442170;
  --purple-800: #371B5E;
  --purple-900: #24113F;

  /* — Neutrals — */
  --neutral-50:  #FAFAFE;
  --neutral-100: #F5F5F7;
  --neutral-200: #E8E8ED;
  --neutral-300: #D1D1D9;
  --neutral-400: #A0A0B0;
  --neutral-500: #72728A;
  --neutral-600: #54546A;
  --neutral-700: #3A3A50;
  --neutral-800: #252538;
  --neutral-900: #1A1A2E;

  /* — Semantic — */
  --white:    #FFFFFF;
  --black:    #0A0A12;
  --success:  #10B981;
  --warning:  #F59E0B;
  --danger:   #EF4444;

  /* — Typography — */
  --font-ar: 'Tajawal', 'Segoe UI', Tahoma, sans-serif;
  --font-en: 'Outfit', 'Inter', system-ui, sans-serif;
  --font-body-en: 'Inter', system-ui, sans-serif;

  /* — Font Sizes (fluid) — */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.8rem);
  --text-sm:   clamp(0.8rem, 0.75rem + 0.3vw, 0.9rem);
  --text-base: clamp(0.9rem, 0.85rem + 0.35vw, 1rem);
  --text-lg:   clamp(1rem, 0.9rem + 0.5vw, 1.2rem);
  --text-xl:   clamp(1.15rem, 1rem + 0.7vw, 1.4rem);
  --text-2xl:  clamp(1.4rem, 1.1rem + 1.2vw, 1.8rem);
  --text-3xl:  clamp(1.7rem, 1.3rem + 1.5vw, 2.4rem);
  --text-4xl:  clamp(2rem, 1.5rem + 2vw, 3rem);
  --text-5xl:  clamp(2.5rem, 1.8rem + 3vw, 4rem);
  --text-6xl:  clamp(3rem, 2rem + 4vw, 5rem);

  /* — Spacing — */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* — Border Radius — */
  --radius-sm:  0.375rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* — Shadows — */
  --shadow-sm:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg:  0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.05);
  --shadow-xl:  0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.06);
  --shadow-2xl: 0 25px 50px -12px rgba(0,0,0,0.15);
  --shadow-glow-teal: 0 0 30px rgba(0, 169, 157, 0.2);
  --shadow-glow-purple: 0 0 30px rgba(91, 45, 142, 0.2);

  /* — Transitions — */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 350ms;
  --duration-slow: 500ms;

  /* — Z-index — */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* — Layout — */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1200px;
  --container-2xl: 1400px;
  --nav-height: 72px;
}

/* ---------- CSS Reset ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* GPU promotion for smooth hover/scroll animations */
.card,
.btn,
.service-card,
.program-detail,
.partner-card,
.gallery-card,
.campus-gallery__item,
.hero__image-card,
.stat-item {
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  transform: translateZ(0);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-ar);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--neutral-800);
  background-color: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  direction: rtl;
}

body.ltr {
  direction: ltr;
}

img, video, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: var(--container-lg);
}

.container--wide {
  max-width: var(--container-2xl);
}

/* ---------- Section ---------- */
.section {
  padding: var(--space-20) 0;
}

.section--sm {
  padding: var(--space-12) 0;
}

.section--lg {
  padding: var(--space-24) 0;
}

/* ---------- Section Header ---------- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header__label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.section-header__title {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--neutral-900);
  margin-bottom: var(--space-4);
}

.section-header__subtitle {
  font-size: var(--text-lg);
  color: var(--neutral-500);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--duration-fast);
}

.btn:hover::before {
  opacity: 1;
}

.btn--lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

.btn--sm {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
}

.btn--primary-teal {
  background: linear-gradient(135deg, var(--teal-500), var(--teal-600));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(0, 169, 157, 0.3);
}

.btn--primary-teal:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 169, 157, 0.4);
}

.btn--primary-purple {
  background: linear-gradient(135deg, var(--purple-500), var(--purple-600));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(91, 45, 142, 0.3);
}

.btn--primary-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(91, 45, 142, 0.4);
}

.btn--outline-teal {
  border: 2px solid var(--teal-500);
  color: var(--teal-500);
}

.btn--outline-teal:hover {
  background: var(--teal-500);
  color: var(--white);
  transform: translateY(-2px);
}

.btn--outline-purple {
  border: 2px solid var(--purple-500);
  color: var(--purple-500);
}

.btn--outline-purple:hover {
  background: var(--purple-500);
  color: var(--white);
  transform: translateY(-2px);
}

.btn--outline-white {
  border: 2px solid rgba(255,255,255,0.8);
  color: var(--white);
}

.btn--outline-white:hover {
  background: var(--white);
  color: var(--neutral-900);
  transform: translateY(-2px);
}

.btn--white {
  background: var(--white);
  color: var(--neutral-800);
  box-shadow: var(--shadow-md);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ---------- Cards ---------- */
.card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
  transition: all var(--duration-normal) var(--ease-out);
  border: 1px solid var(--neutral-200);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card--glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* ---------- Image Placeholder ---------- */
.img-placeholder {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-placeholder--teal {
  background: linear-gradient(135deg, var(--teal-50), var(--teal-100), var(--teal-50));
}

.img-placeholder--purple {
  background: linear-gradient(135deg, var(--purple-50), var(--purple-100), var(--purple-50));
}

.img-placeholder--neutral {
  background: linear-gradient(135deg, var(--neutral-100), var(--neutral-200), var(--neutral-100));
}

.img-placeholder__icon {
  font-size: 3rem;
  opacity: 0.3;
}

/* ---------- Image Cards, Frames & Gallery ---------- */
.hero__image-card {
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.05);
  position: relative;
  transition: transform var(--duration-normal) var(--ease-out), box-shadow var(--duration-normal) var(--ease-out);
}

.hero__image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 35px 70px rgba(0, 0, 0, 0.45);
}

.hero__image-card img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.about-hero__image {
  aspect-ratio: 4/3;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: var(--neutral-100);
}

.about-hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-slow) var(--ease-out);
}

.about-hero__image:hover img {
  transform: scale(1.04);
}

.image-floating-badge {
  position: absolute;
  bottom: 1.25rem;
  right: 1.25rem;
  background: rgba(10, 25, 47, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  z-index: 2;
}

[dir="ltr"] .image-floating-badge {
  right: auto;
  left: 1.25rem;
}

.theme-institute .image-floating-badge {
  background: rgba(28, 13, 48, 0.9);
}

/* Gallery / Showcase Cards */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-10);
}

@media (max-width: 900px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
}

.gallery-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-200);
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.gallery-card__img-wrap {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
  background: var(--neutral-100);
}

.gallery-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration-slow) var(--ease-out);
}

.gallery-card:hover .gallery-card__img-wrap img {
  transform: scale(1.05);
}

.gallery-card__content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.gallery-card__tag {
  display: inline-block;
  align-self: flex-start;
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.gallery-card__tag--teal {
  background: var(--teal-50);
  color: var(--teal-700);
}

.gallery-card__tag--purple {
  background: var(--purple-50);
  color: var(--purple-700);
}

.gallery-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--neutral-900);
  margin-bottom: var(--space-2);
}

.gallery-card__desc {
  font-size: var(--text-sm);
  color: var(--neutral-600);
  line-height: 1.6;
}

/* ---------- Navigation (Shared) ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-sticky);
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  align-items: center;
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nav__logo {
  height: 42px;
  width: auto;
}

.nav__logo img {
  height: 100%;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 2px;
  border-radius: 1px;
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__link--active {
  font-weight: 700;
}

/* Nav Actions container (controls spacing between buttons) */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Language Toggle Button */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  line-height: 1;
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.lang-toggle i {
  font-size: 0.85rem;
  opacity: 0.9;
}

/* Scrolled & Open states for Language Toggle */
.nav--scrolled .lang-toggle,
.nav.nav--open .lang-toggle {
  background: var(--neutral-100);
  border-color: var(--neutral-300);
  color: var(--neutral-800);
}

.nav--scrolled .lang-toggle:hover,
.nav.nav--open .lang-toggle:hover {
  background: var(--neutral-200);
}

/* Entity switcher badge */
.nav__switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__switch:hover {
  transform: scale(1.05);
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  transition: all var(--duration-normal) var(--ease-out);
}

/* Mobile nav */
body.menu-open {
  overflow: hidden;
}

.nav.nav--open,
.theme-company .nav.nav--open,
.theme-institute .nav.nav--open,
.nav.nav--scrolled.nav--open,
.theme-company .nav--scrolled.nav--open,
.theme-institute .nav--scrolled.nav--open {
  background: #ffffff !important;
  background-color: #ffffff !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  box-shadow: none !important;
}

.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  height: calc(100vh - var(--nav-height));
  height: calc(100dvh - var(--nav-height));
  background: #ffffff !important;
  background-color: #ffffff !important;
  opacity: 1 !important;
  z-index: var(--z-overlay);
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.nav__mobile.active {
  display: flex !important;
  background: #ffffff !important;
  background-color: #ffffff !important;
  opacity: 1 !important;
}

.nav__mobile .nav__link {
  font-size: var(--text-xl);
  padding: var(--space-4) var(--space-4);
  border-bottom: 1px solid var(--neutral-200);
  color: var(--neutral-800);
}

/* Mobile Drawer Footer */
.nav__mobile-footer {
  margin-top: auto;
  padding-top: var(--space-6);
  border-top: 1px solid var(--neutral-200);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
}

.nav__mobile-footer .lang-toggle,
.nav__mobile-footer .nav__switch {
  display: flex !important;
  flex: 1;
  justify-content: center;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

/* ---------- Footer ---------- */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  color: var(--neutral-300);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer__brand-desc {
  font-size: var(--text-sm);
  line-height: 1.8;
  margin-top: var(--space-4);
  opacity: 0.8;
}

.footer__heading {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--white);
  margin-bottom: var(--space-6);
}

.footer__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  opacity: 0.75;
  transition: all var(--duration-fast) var(--ease-out);
}

.footer__link i {
  width: 18px;
  text-align: center;
  flex-shrink: 0;
  color: inherit;
}

body[dir="rtl"] .footer__link:hover,
body:not([dir="ltr"]) .footer__link:hover {
  opacity: 1;
  transform: translateX(-4px);
}

body[dir="ltr"] .footer__link:hover {
  opacity: 1;
  transform: translateX(4px);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.footer__social a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--duration-normal) var(--ease-out);
}

.footer__social a:hover {
  transform: translateY(-3px);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-sm);
  opacity: 0.6;
}

/* ---------- Scroll Animations (GPU-Accelerated) ---------- */
.reveal {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
  backface-visibility: hidden;
}

.reveal.visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  will-change: auto;
}

.reveal--left {
  transform: translate3d(24px, 0, 0);
}

.reveal--left.visible {
  transform: translate3d(0, 0, 0);
  will-change: auto;
}

.reveal--right {
  transform: translate3d(-24px, 0, 0);
}

.reveal--right.visible {
  transform: translate3d(0, 0, 0);
  will-change: auto;
}

.reveal--scale {
  transform: scale(0.96) translateZ(0);
}

.reveal--scale.visible {
  transform: scale(1) translateZ(0);
  will-change: auto;
}

/* Stagger children */
.stagger-children > * {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
  backface-visibility: hidden;
}

.stagger-children.visible > * {
  will-change: auto;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 500ms; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 600ms; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 700ms; }

.stagger-children.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Grid Utilities ---------- */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Form Elements ---------- */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--neutral-700);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--neutral-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  background: var(--white);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--teal-500);
  box-shadow: 0 0 0 3px rgba(0, 169, 157, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__actions {
    gap: var(--space-3);
  }

  .nav__inner .nav__switch {
    display: none;
  }

  .lang-toggle {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .section-header__title {
    font-size: var(--text-3xl);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--neutral-100);
}

::-webkit-scrollbar-thumb {
  background: var(--neutral-400);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--neutral-500);
}

/* ---------- Selection ---------- */
::selection {
  background: var(--teal-200);
  color: var(--neutral-900);
}