/* ============================================
   LKS - Little Khwarezmy School
   Design System & Main Styles
   ============================================ */

/* === CSS Custom Properties (Design Tokens) === */
:root {
  /* Primary Colors */
  --color-primary-gold: #febe1f;
  --color-primary-navy: #1d2b48;

  /* Derived Accent Colors */
  --color-gold-light: #ffd966;
  --color-gold-dark: #d4a019;
  --color-navy-light: #2a3d5c;
  --color-navy-dark: #141d33;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-bg-warm: #fffdf8;
  --color-text-dark: #2c3e50;
  --color-text-muted: #6c757d;
  --color-border: #e9ecef;

  /* Typography */
  --font-arabic: 'Cairo', 'Segoe UI', Tahoma, sans-serif;
  --font-english: 'Inter', 'Segoe UI', Tahoma, sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  /* Spacing (8px grid) */
  --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;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
}

/* === Reset & Base Styles === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-arabic);
  line-height: 1.6;
  color: var(--color-text-dark);
  background-color: var(--color-white);
  overflow-x: hidden;
}

/* RTL/LTR body classes */
body.rtl {
  direction: rtl;
  text-align: right;
}

body.ltr {
  direction: ltr;
  text-align: left;
  font-family: var(--font-english);
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-fast);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* === Typography === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary-navy);
}

h1 {
  font-size: var(--text-5xl);
}

h2 {
  font-size: var(--text-4xl);
}

h3 {
  font-size: var(--text-2xl);
}

h4 {
  font-size: var(--text-xl);
}

p {
  margin-bottom: var(--space-4);
}

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

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

.section-title {
  text-align: center;
  margin-bottom: var(--space-4);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-primary-gold);
  margin: var(--space-4) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto var(--space-12);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary-gold);
  color: var(--color-primary-navy);
}

.btn-primary:hover {
  background: var(--color-gold-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-primary-navy);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-navy);
  border: 2px solid var(--color-primary-navy);
}

.btn-outline:hover {
  background: var(--color-primary-navy);
  color: var(--color-white);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

/* === Header & Navigation === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.logo img {
  height: 95px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-dark);
  padding: var(--space-2) 0;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary-gold);
  transform: scaleX(0);
  transition: var(--transition-fast);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link:hover {
  color: var(--color-primary-navy);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-bg-light);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary-navy);
  transition: var(--transition-fast);
}

.lang-toggle:hover {
  background: var(--color-primary-gold);
}

.lang-toggle .globe-icon {
  width: 18px;
  height: 18px;
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary-navy);
  transition: var(--transition-fast);
}

/* Mobile Navigation (hidden by default, shown on mobile/tablet when active) */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  padding: var(--space-8);
  z-index: 999;
}

/* === Hero Section === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-color: var(--color-primary-navy);
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
      rgba(29, 43, 72, 0.9) 0%,
      rgba(29, 43, 72, 0.35) 50%,
      rgba(29, 43, 72, 0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: var(--space-8);
}

.hero-logo {
  width: 120px;
  height: auto;
  margin: 0 auto var(--space-8);
  filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
}

.hero-title {
  font-size: var(--text-5xl);
  color: var(--color-white);
  margin-bottom: var(--space-4);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-slogan {
  font-size: var(--text-xl);
  color: var(--color-primary-gold);
  margin-bottom: var(--space-8);
  font-weight: 500;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* === About Section === */
.about {
  background: var(--color-bg-warm);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.about-content h2 {
  margin-bottom: var(--space-6);
}

.about-content p {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about-image::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  height: 100px;
  background: var(--color-primary-gold);
  border-radius: var(--radius-lg);
  z-index: -1;
}

.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* === Programs Section === */
.programs {
  background: var(--color-white);
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.program-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

.program-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-gold);
}

.program-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-6);
  background: linear-gradient(135deg, var(--color-primary-gold), var(--color-gold-dark));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

.program-icon svg {
  width: 40px;
  height: 40px;
  fill: var(--color-primary-navy);
}

.program-card h3 {
  margin-bottom: var(--space-4);
}

.program-card p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.program-card .btn {
  margin-top: var(--space-4);
}

/* === Why Choose Us Section === */
.why-us {
  background: var(--color-primary-navy);
  color: var(--color-white);
}

.why-us .section-title {
  color: var(--color-white);
}

.why-us .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.feature-card {
  text-align: center;
  padding: var(--space-6);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--space-4);
  background: rgba(254, 190, 31, 0.15);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--color-primary-gold);
  fill: none;
  stroke-width: 2;
}

.feature-card h4 {
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.feature-card p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
}

/* === Facilities Gallery === */
.facilities {
  background: var(--color-bg-light);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-slow);
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
      rgba(29, 43, 72, 0.6) 0%,
      transparent 50%);
  opacity: 0;
  transition: var(--transition-base);
}

.gallery-item:hover::after {
  opacity: 1;
}

/* === Admissions CTA === */
.admissions-cta {
  background: linear-gradient(135deg,
      var(--color-primary-gold) 0%,
      var(--color-gold-dark) 100%);
  position: relative;
  overflow: hidden;
}

.admissions-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.admissions-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.admissions-content h2 {
  color: var(--color-primary-navy);
  margin-bottom: var(--space-4);
}

.admissions-content p {
  color: var(--color-navy-dark);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}

.admissions-cta .btn-primary {
  background: var(--color-primary-navy);
  color: var(--color-white);
}

.admissions-cta .btn-primary:hover {
  background: var(--color-navy-dark);
}

/* === Footer === */
.footer {
  background: var(--color-navy-dark);
  color: var(--color-white);
  padding: var(--space-16) 0 var(--space-8);
}

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

.footer-brand .logo {
  margin-bottom: var(--space-4);
}

.footer-brand .logo img {
  height: 140px;
  filter: brightness(0) invert(0.8);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
}

.footer-heading {
  font-size: var(--text-lg);
  color: var(--color-primary-gold);
  margin-bottom: var(--space-6);
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary-gold);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  stroke: var(--color-primary-gold);
  flex-shrink: 0;
  margin-top: 2px;
}

.social-links {
  display: flex;
  gap: var(--space-3);
}

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary-gold);
}

.social-link svg {
  width: 20px;
  height: 20px;
  fill: var(--color-white);
}

.social-link:hover svg {
  fill: var(--color-primary-navy);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-sm);
  margin: 0;
}

/* === Responsive Design === */

/* Tablets */
@media (max-width: 992px) {
  :root {
    --text-5xl: 2.5rem;
    --text-4xl: 2rem;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  /* Mobile Navigation */
  .mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    padding: var(--space-8);
    transform: translateX(100%);
    transition: var(--transition-base);
    z-index: 999;
  }

  .mobile-nav.active {
    display: block;
    transform: translateX(0);
  }

  body.rtl .mobile-nav {
    transform: translateX(-100%);
  }

  body.rtl .mobile-nav.active {
    display: block;
    transform: translateX(0);
  }

  .mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
  }

  .mobile-nav-link {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-primary-navy);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
  }

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

  .about-image {
    order: -1;
  }

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

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

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --text-5xl: 2rem;
    --text-4xl: 1.75rem;
    --text-3xl: 1.5rem;
    --space-20: 3rem;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .hero-content {
    padding: var(--space-4);
  }

  .hero-logo {
    width: 80px;
  }

  .hero-cta {
    flex-direction: column;
  }

  .hero-cta .btn {
    width: 100%;
  }

  .programs-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-contact li {
    justify-content: center;
  }

  .social-links {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* === Utility Classes === */
.text-center {
  text-align: center;
}

.text-gold {
  color: var(--color-primary-gold);
}

.text-navy {
  color: var(--color-primary-navy);
}

.bg-gold {
  background-color: var(--color-primary-gold);
}

.bg-navy {
  background-color: var(--color-primary-navy);
}

/* Screen reader only */
.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;
}