/* ============================================
   GAIS - Algohary AI School
   Premium Design System v2 — Dual Theme
   ============================================ */

/* --- Dark Theme (Default) --- */
:root, [data-theme="dark"] {
  --bg-primary: #0A0F1C;
  --bg-secondary: #111827;
  --bg-surface: #1E293B;
  --bg-surface-hover: #273548;
  --accent: #1E90FF;
  --accent-secondary: #00B4D8;
  --accent-green: #10B981;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --glass-bg: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(148, 163, 184, 0.1);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(30,144,255,0.2);
  --card-shadow: 0 4px 24px rgba(0,0,0,0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-ar-display: 'Cairo', sans-serif;
  --font-ar-body: 'Noto Sans Arabic', sans-serif;
  --font-en-display: 'Outfit', sans-serif;
  --font-en-body: 'Inter', sans-serif;
  --nav-height: 72px;
}

/* --- Light Theme --- */
[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #EFF3F8;
  --bg-surface: #FFFFFF;
  --bg-surface-hover: #F1F5F9;
  --accent: #1565C0;
  --accent-secondary: #0288D1;
  --accent-green: #0D9668;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --glass-bg: rgba(255,255,255,0.8);
  --glass-border: rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 20px rgba(21,101,192,0.12);
  --card-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body {
  font-family: var(--font-ar-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  transition: background 0.4s, color 0.4s;
}
h1, h2, h3, h4, h5, h6,
.hero-title, .section-title, .course-title,
.nav-logo span, .stat-number {
  font-family: var(--font-ar-display);
  letter-spacing: -0.01em;
}
[dir="ltr"] body { font-family: var(--font-en-body); }
[dir="ltr"] h1, [dir="ltr"] h2, [dir="ltr"] h3, [dir="ltr"] h4,
[dir="ltr"] .hero-title, [dir="ltr"] .section-title, [dir="ltr"] .course-title,
[dir="ltr"] .nav-logo span, [dir="ltr"] .stat-number {
  font-family: var(--font-en-display);
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
button, input, select, textarea {
  font-family: inherit; font-size: inherit;
  border: none; outline: none; background: none; color: inherit;
}
button { cursor: pointer; }

/* --- Utilities --- */
.container { width: 90%; max-width: 1200px; margin: 0 auto; }
.section { padding: 100px 0; position: relative; }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 60px;
  max-width: 600px;
  margin-inline: auto;
}
.accent-line {
  width: 80px; height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin: 16px auto 0;
}

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 14px 32px; border-radius: var(--radius-md);
  font-weight: 600; font-size: 1rem; transition: var(--transition);
  position: relative; overflow: hidden;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 4px 20px rgba(30,144,255,0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(30,144,255,0.35);
  filter: brightness(1.1);
}
.btn-outline {
  border: 2px solid var(--accent); color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent); color: #fff;
  transform: translateY(-2px);
}
.btn-platform {
  background: #10B981; color: #fff;
  box-shadow: 0 4px 16px rgba(16,185,129,0.3);
  border-radius: 30px; font-weight: 700;
}
.btn-platform:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(16,185,129,0.4);
  filter: brightness(1.1);
}

/* --- Theme Toggle --- */
.theme-toggle {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--bg-surface); border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--transition); font-size: 1.1rem;
}
.theme-toggle:hover { background: var(--bg-surface-hover); transform: scale(1.1); }

/* --- Navbar --- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-height); z-index: 1000;
  transition: var(--transition); display: flex; align-items: center;
}
.navbar.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo img { height: 48px; width: auto; }
.nav-logo span { font-weight: 700; font-size: 1.15rem; color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text-secondary); font-size: 0.95rem; font-weight: 500; position: relative; padding: 4px 0; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -2px; inset-inline-start: 0;
  width: 0; height: 2px; background: var(--accent); transition: var(--transition);
}
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.lang-switch {
  display: flex; align-items: center; background: var(--bg-surface);
  border-radius: 20px; padding: 4px; gap: 2px;
}
.lang-switch a { padding: 6px 14px; border-radius: 16px; font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); transition: var(--transition); }
.lang-switch a.active { background: var(--accent); color: #fff; }
.nav-cta { padding: 10px 24px !important; font-size: 0.9rem !important; }
.nav-platform { padding: 10px 20px !important; font-size: 0.88rem !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; z-index: 1001; }
.hamburger span { width: 26px; height: 2.5px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  padding-top: var(--nav-height); position: relative; overflow: hidden;
}
#particles-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero .container {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-content { max-width: 560px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(30,144,255,0.1); border: 1px solid rgba(30,144,255,0.2);
  color: var(--accent); padding: 8px 18px; border-radius: 30px;
  font-size: 0.9rem; font-weight: 500; margin-bottom: 24px;
}
.hero-title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; line-height: 1.3; margin-bottom: 20px; }
.hero-title .highlight { color: var(--accent); }
.hero-desc { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 36px; line-height: 1.9; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-image { display: flex; justify-content: center; align-items: center; }
.hero-photo-wrapper {
  position: relative; width: 100%; max-width: 500px;
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-photo-wrapper img { width: 100%; height: auto; display: block; }

/* --- About --- */
.about .container { display: grid; grid-template-columns: auto 1fr; gap: 60px; align-items: center; }
.about-photo {
  width: 300px; height: 360px; border-radius: var(--radius-lg);
  overflow: hidden; border: 3px solid var(--accent);
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-text h3 { font-size: 1.3rem; color: var(--accent); margin-bottom: 16px; }
.about-text p { color: var(--text-secondary); margin-bottom: 16px; line-height: 2; }
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.stat-card {
  background: var(--bg-surface); padding: 24px; border-radius: var(--radius-md);
  text-align: center; border: 1px solid var(--glass-border); transition: var(--transition);
}
.stat-card:hover { border-color: var(--accent); box-shadow: var(--shadow-glow); transform: translateY(-4px); }
.stat-number { font-size: 2.2rem; font-weight: 700; color: var(--accent); }
.stat-label { color: var(--text-secondary); font-size: 0.9rem; margin-top: 4px; }

/* --- Courses --- */
.courses-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 30px; }
.course-card {
  background: var(--bg-surface); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--glass-border);
  transition: var(--transition); position: relative;
}
.course-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--accent); }
.course-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(30,144,255,0.3); }
.course-header { padding: 30px 28px 20px; }
.course-icon {
  width: 56px; height: 56px; background: rgba(30,144,255,0.1);
  border-radius: var(--radius-md); display: flex; align-items: center;
  justify-content: center; margin-bottom: 20px; font-size: 1.6rem; color: var(--accent);
}
.course-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; }
.course-desc { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; margin-bottom: 16px; }
.course-topics { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.course-topic {
  background: rgba(30,144,255,0.08); color: var(--accent);
  padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 500;
}
.course-footer {
  padding: 16px 28px 24px; display: flex; align-items: center;
  justify-content: space-between; border-top: 1px solid var(--glass-border);
}
.course-meta { display: flex; gap: 16px; }
.course-meta span { display: flex; align-items: center; gap: 4px; color: var(--text-muted); font-size: 0.85rem; }
.course-book-btn { padding: 10px 22px; font-size: 0.9rem; }

/* --- Services --- */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.service-card {
  background: var(--bg-surface); border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: 36px 24px; text-align: center;
  transition: var(--transition);
}
.service-card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow-glow); }
.service-icon {
  width: 56px; height: 56px; margin: 0 auto 20px;
  background: rgba(30,144,255,0.1); border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
}
.service-icon svg { width: 28px; height: 28px; stroke: var(--accent); }
.service-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.service-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* --- Why Section --- */
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.why-card {
  display: flex; align-items: flex-start; gap: 16px;
  background: var(--bg-surface); padding: 28px; border-radius: var(--radius-md);
  border: 1px solid var(--glass-border); transition: var(--transition);
}
.why-card:hover { border-color: var(--accent); transform: translateX(-4px); }
[dir="ltr"] .why-card:hover { transform: translateX(4px); }
.why-icon {
  flex-shrink: 0; width: 48px; height: 48px; background: rgba(30,144,255,0.1);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.why-icon svg { width: 22px; height: 22px; stroke: var(--accent); }
.why-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.why-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* --- Testimonials --- */
.testimonials-wrapper { position: relative; overflow: hidden; }
.testimonials-track { display: flex; gap: 24px; transition: transform 0.5s ease; }
.testimonial-card {
  min-width: calc(33.333% - 16px); background: var(--bg-surface);
  border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
  padding: 32px; flex-shrink: 0;
}
.testimonial-stars { color: #FBBF24; font-size: 1rem; margin-bottom: 16px; }
.testimonial-text { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.9; margin-bottom: 20px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--accent); display: flex; align-items: center;
  justify-content: center; color: #fff; font-weight: 700; font-size: 1.1rem;
}
.testimonial-name { font-weight: 600; font-size: 0.95rem; }
.testimonial-role { color: var(--text-muted); font-size: 0.8rem; }
.testimonial-nav { display: flex; justify-content: center; gap: 12px; margin-top: 32px; }
.testimonial-nav button {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--glass-border); background: var(--bg-surface);
  color: var(--text-primary); display: flex; align-items: center;
  justify-content: center; transition: var(--transition);
}
.testimonial-nav button:hover { background: var(--accent); color: #fff; }

/* --- Booking --- */
.booking { background: var(--bg-secondary); }
.booking-form {
  max-width: 700px; margin: 0 auto; background: var(--bg-surface);
  border: 1px solid var(--glass-border); border-radius: var(--radius-xl); padding: 48px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 4px; }
.form-group.full-width { grid-column: 1 / -1; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 0.9rem; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 14px 18px; background: var(--bg-primary);
  border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  color: var(--text-primary); font-size: 0.95rem; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(30,144,255,0.12);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.radio-group { display: flex; gap: 20px; flex-wrap: wrap; padding-top: 8px; }
.radio-label { display: flex; align-items: center; gap: 8px; cursor: pointer; color: var(--text-secondary); }
.radio-label input[type="radio"] { width: 18px; height: 18px; accent-color: var(--accent); }
.form-submit { margin-top: 24px; width: 100%; padding: 16px; font-size: 1.1rem; }
.form-msg { text-align: center; margin-top: 16px; padding: 12px; border-radius: var(--radius-sm); display: none; }
.form-msg.success { display: block; background: rgba(16,185,129,0.1); color: var(--accent-green); border: 1px solid rgba(16,185,129,0.3); }
.form-msg.error { display: block; background: rgba(239,68,68,0.1); color: #EF4444; border: 1px solid rgba(239,68,68,0.3); }

/* --- Contact --- */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; margin-bottom: 40px; }
.contact-card {
  background: var(--bg-surface); border: 1px solid var(--glass-border);
  border-radius: var(--radius-md); padding: 28px; text-align: center; transition: var(--transition);
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.contact-card .icon { font-size: 2rem; margin-bottom: 12px; }
.contact-card h3 { font-size: 1rem; margin-bottom: 6px; }
.contact-card p { color: var(--text-secondary); font-size: 0.9rem; }
.social-links { display: flex; justify-content: center; gap: 16px; }
.social-link {
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--bg-surface); border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; transition: var(--transition);
}
.social-link:hover { background: var(--accent); color: #fff; border-color: transparent; transform: translateY(-4px); box-shadow: var(--shadow-glow); }

/* --- Footer --- */
.footer {
  background: var(--bg-secondary); padding: 60px 0 24px; border-top: 1px solid var(--glass-border);
}
[data-theme="dark"] .footer { background: #050A15; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin: 16px 0; line-height: 1.8; }
.footer h4 { font-size: 1rem; margin-bottom: 16px; color: var(--accent); }
.footer-links a { display: block; color: var(--text-secondary); padding: 4px 0; font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--glass-border); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  color: var(--text-muted); font-size: 0.85rem;
}

/* --- Animations --- */
.fade-up { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-content { max-width: 100%; }
  .hero-buttons { justify-content: center; }
  .hero-image { order: -1; }
  .hero-photo-wrapper { max-width: 400px; margin: 0 auto; }
  .about .container { grid-template-columns: 1fr; text-align: center; }
  .about-photo { margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .testimonial-card { min-width: calc(50% - 12px); }
}
@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .nav-links {
    display: none; position: fixed; top: 0; inset-inline-start: 0;
    width: 100%; height: 100vh; background: var(--glass-bg);
    backdrop-filter: blur(20px); flex-direction: column;
    justify-content: center; gap: 32px;
  }
  [data-theme="dark"] .nav-links { background: rgba(10,15,28,0.98); }
  .nav-links.active { display: flex; }
  .nav-links a { font-size: 1.2rem; }
  .hamburger { display: flex; }
  .nav-cta, .nav-platform { display: none !important; }
  .form-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 16px; }
  .booking-form { padding: 28px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .testimonial-card { min-width: 100%; }
  .courses-grid { grid-template-columns: 1fr; }
}

/* ── Courses Section ──────────────────────── */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 40px;
}
.course-card {
  background: var(--bg-surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--accent);
}
.course-header { padding: 28px 24px 16px; flex: 1; }
.course-level {
  display: inline-block;
  background: rgba(30,144,255,0.15);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.course-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.course-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 14px;
}
.course-topics { display: flex; flex-wrap: wrap; gap: 6px; }
.course-topic {
  background: var(--bg-surface-hover);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
}
.course-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.course-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.course-book-btn {
  padding: 8px 20px !important;
  font-size: 0.85rem !important;
}