/* ==========================================
   Nexora — Digital Skills Platform
   Color Theme: Green & Black (Futuristic)
   ========================================== */

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

/* ---- Design Tokens ---- */
:root {
  --bg-primary: #000000;
  --bg-secondary: #050a05;
  --bg-card: rgba(0, 255, 136, 0.03);
  --bg-card-hover: rgba(0, 255, 136, 0.08);
  --bg-glass: rgba(0, 20, 10, 0.6);

  --green-neon: #00ff88;
  --green-bright: #00e676;
  --green-mid: #00c853;
  --green-dark: #004d40;
  --green-glow: rgba(0, 255, 136, 0.3);

  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.4);

  --border-color: rgba(0, 255, 136, 0.12);
  --border-hover: rgba(0, 255, 136, 0.35);

  --font-ar: 'Tajawal', sans-serif;
  --font-en: 'Inter', sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: all 0.2s ease;
}

/* ---- Light Theme Override ---- */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --green-neon: #00a455; /* A deeper, richer green for white backgrounds */
  --green-bright: #00c853;
  --green-mid: #008744;
  --green-dark: #00e676;
  --green-glow: rgba(0, 164, 85, 0.15);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --border-color: rgba(0, 164, 85, 0.2);
  --border-hover: rgba(0, 164, 85, 0.5);
}

/* Specific Light Mode Adjustments */
[data-theme="light"] .navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

[data-theme="light"] .course-card,
[data-theme="light"] .feature-card,
[data-theme="light"] .chatbot-panel {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(0,0,0,0.05);
}

[data-theme="light"] .hero-title,
[data-theme="light"] .hero-subtitle {
  color: #ffffff; /* Keep white over the dark video */
}

[data-theme="light"] .hero-badge {
  background: rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.2);
  color: #00ffa3; /* Keep original neon here */
}

[data-theme="light"] .menu-toggle span {
  background: var(--text-primary);
}

[data-theme="light"] .hero-buttons .btn-secondary {
  color: var(--green-neon) !important;
  border-color: var(--green-neon) !important;
}

[data-theme="light"] .hero-buttons .btn-secondary i {
  color: var(--green-neon) !important;
}

[data-theme="light"] .hero-buttons .btn-secondary:hover {
  background: rgba(0, 164, 85, 0.05) !important;
  border-color: var(--green-neon) !important;
  color: var(--green-neon) !important;
}

/* --- Chatbot Light Mode Premium Adjustments --- */
[data-theme="light"] .chat-preview,
[data-theme="light"] .chatbot-panel {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid rgba(0, 164, 85, 0.2);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(255,255,255,0.5) inset;
}

[data-theme="light"] .chat-header {
  background: rgba(0, 164, 85, 0.04);
  border-bottom: 1px solid rgba(0, 164, 85, 0.1);
}

[data-theme="light"] .chat-avatar {
  background: linear-gradient(135deg, #00c853, #008744);
  color: #fff;
  box-shadow: 0 4px 15px rgba(0, 200, 83, 0.3);
}

[data-theme="light"] .chat-header-info span {
  color: #009624;
  font-weight: 600;
}

[data-theme="light"] .chat-message.bot {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  color: #1e293b;
  box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

[data-theme="light"] .chat-message.user {
  background: linear-gradient(135deg, #00c853, #008744);
  border: none;
  color: #ffffff;
  box-shadow: 0 6px 15px rgba(0, 200, 83, 0.25);
}

[data-theme="light"] .chat-input {
  background: rgba(255, 255, 255, 0.6);
  border-top: 1px solid rgba(0, 164, 85, 0.1);
}

[data-theme="light"] .chat-input input {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  color: #0f172a;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

[data-theme="light"] .chat-input input:focus {
  border-color: #00c853;
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(0, 200, 83, 0.1);
}

[data-theme="light"] .chat-input input::placeholder {
  color: #94a3b8;
}

[data-theme="light"] .chat-send-btn {
  background: linear-gradient(135deg, #00c853, #008744);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(0, 200, 83, 0.25);
}

[data-theme="light"] .chat-send-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(0, 200, 83, 0.35);
}

/* Base Light theme refinements */
[data-theme="light"] .btn-primary {
  background: linear-gradient(135deg, #00c853, #008744);
  color: #ffffff;
  box-shadow: 0 8px 25px rgba(0, 200, 83, 0.3);
}

[data-theme="light"] .btn-primary:hover {
  box-shadow: 0 12px 30px rgba(0, 200, 83, 0.4);
}

[data-theme="light"] .course-icon,
[data-theme="light"] .feature-icon,
[data-theme="light"] .ai-feature-icon {
  background: #ffffff;
  border: 1px solid rgba(0, 164, 85, 0.2);
  color: #00c853;
  box-shadow: 0 8px 20px rgba(0, 200, 83, 0.08);
}

[data-theme="light"] .course-card:hover .course-icon,
[data-theme="light"] .feature-card:hover .feature-icon {
  background: #00c853;
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(0, 200, 83, 0.3);
  border-color: #00c853;
}

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

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

body {
  font-family: var(--font-ar);
  background: var(--bg-primary);
  color: var(--text-primary);
  direction: rtl;
  overflow-x: hidden;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

ul { list-style: none; }

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

/* ---- Utility ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--green-neon);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
  margin-bottom: 16px;
  font-family: var(--font-en);
}

.section-label::before {
  content: '';
  width: 30px;
  height: 2px;
  background: var(--green-neon);
  box-shadow: 0 0 8px var(--green-glow);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

.section-title .highlight {
  color: var(--green-neon);
  text-shadow: 0 0 30px var(--green-glow);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

/* ---- Animated Background ---- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---- Floating Orbs ---- */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: var(--green-neon);
  top: -200px;
  right: -150px;
  animation: float-orb 12s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  background: var(--green-mid);
  bottom: -100px;
  left: -100px;
  animation: float-orb 15s ease-in-out infinite reverse;
}

.orb-3 {
  width: 300px;
  height: 300px;
  background: var(--green-bright);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: float-orb 10s ease-in-out infinite;
}

@keyframes float-orb {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-40px) scale(1.1); }
}

/* =====================
   NAVBAR
   ===================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  backdrop-filter: blur(0px);
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 100%; /* Make navbar full width */
  padding: 0 40px; /* Provide some padding from screen edges */
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  z-index: 1001;
  flex: 1; /* Take up equal space on the right */
  justify-content: flex-start;
}

.nav-brand .brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--green-neon), var(--green-dark));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 20px var(--green-glow);
}

.nav-brand span {
  background: linear-gradient(135deg, var(--green-neon), var(--green-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-en);
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: auto; /* Sit perfectly in the center */
}

.nav-univ-logos {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1; /* Take up equal space on the left */
  justify-content: flex-end;
}

.nav-univ-logos img {
  height: 48px;
  width: auto;
  border-radius: var(--radius-sm);
  background: white; /* Ensures dark logos are visible if background is dark */
  padding: 4px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  transition: var(--transition-fast);
}

.nav-univ-logos img:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 255, 136, 0.2);
}

.nav-links a {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--green-neon);
  background: rgba(0, 255, 136, 0.06);
}

.theme-toggle {
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid var(--border-color);
  color: var(--green-neon);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.2rem;
  margin-right: 8px;
  margin-left: 8px;
}

[data-theme="light"] .theme-toggle {
  background: rgba(0, 164, 85, 0.1);
  color: var(--green-neon);
}

.theme-toggle:hover {
  background: rgba(0, 255, 136, 0.2);
  transform: rotate(15deg) scale(1.05);
}

[data-theme="light"] .theme-toggle:hover {
  background: rgba(0, 164, 85, 0.2);
}

.theme-toggle .moon-icon { display: none; }
[data-theme="light"] .theme-toggle .sun-icon { display: none; }
[data-theme="light"] .theme-toggle .moon-icon { display: block; }

/* Login Button */
.nav-login-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px !important;
  background: rgba(0, 255, 136, 0.08) !important;
  border: 1px solid var(--border-color);
  color: var(--green-neon) !important;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  border-radius: var(--radius-sm) !important;
  transition: var(--transition) !important;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.nav-login-btn i {
  font-size: 1.1rem;
  transition: var(--transition-fast);
}

.nav-login-btn:hover {
  background: rgba(0, 255, 136, 0.15) !important;
  border-color: var(--green-neon);
  box-shadow: 0 0 20px var(--green-glow);
  transform: translateY(-2px);
}

.nav-login-btn:hover i {
  transform: translateX(-3px);
}

[data-theme="light"] .nav-login-btn {
  background: rgba(0, 164, 85, 0.08) !important;
  border: 1px solid rgba(0, 164, 85, 0.25);
  color: #008744 !important;
}

[data-theme="light"] .nav-login-btn:hover {
  background: rgba(0, 164, 85, 0.15) !important;
  border-color: #00a455;
  box-shadow: 0 0 20px rgba(0, 164, 85, 0.2);
}

/* User Profile in Nav */
.user-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid rgba(0, 255, 136, 0.2);
  padding: 5px 12px;
  border-radius: 50px;
}

.user-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.nav-logout-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(255, 60, 60, 0.1);
  border: 1px solid rgba(255, 60, 60, 0.3);
  color: #ff4d4d;
  font-weight: 600;
  font-size: 0.85rem;
  border-radius: 50px;
  transition: var(--transition-fast);
  cursor: pointer;
}

.nav-logout-btn:hover {
  background: rgba(255, 60, 60, 0.2);
  border-color: #ff4d4d;
  box-shadow: 0 0 15px rgba(255, 60, 60, 0.3);
}

[data-theme="light"] .user-profile {
  background: rgba(0, 164, 85, 0.05);
  border-color: rgba(0, 164, 85, 0.2);
}

[data-theme="light"] .nav-logout-btn {
  background: rgba(220, 38, 38, 0.08);
  border-color: rgba(220, 38, 38, 0.3);
  color: #dc2626;
}

[data-theme="light"] .nav-logout-btn:hover {
  background: rgba(220, 38, 38, 0.15);
  border-color: #dc2626;
  box-shadow: 0 0 15px rgba(220, 38, 38, 0.2);
}

.nav-cta {
  padding: 10px 28px !important;
  background: linear-gradient(135deg, var(--green-neon), var(--green-mid)) !important;
  color: #000 !important;
  font-weight: 700 !important;
  border-radius: var(--radius-sm) !important;
  box-shadow: 0 0 20px var(--green-glow);
  transition: var(--transition) !important;
}

.nav-cta:hover {
  box-shadow: 0 0 40px var(--green-glow) !important;
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
  background: none;
  border: none;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* =====================
   HERO SECTION
   ===================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  position: relative;
  padding: 0;
  overflow: hidden;
}

/* Video Background */
.hero-video-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  padding-top: 200px;
  background: linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.85) 0%,
    rgba(0, 0, 0, 0.6) 40%,
    rgba(0, 0, 0, 0.2) 70%,
    transparent 100%
  );
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid var(--border-color);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--green-neon);
  margin-bottom: 32px;
  backdrop-filter: blur(10px);
  animation: fadeInUp 0.8s ease;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--green-neon);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
  box-shadow: 0 0 8px var(--green-neon);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title .highlight {
  display: inline;
  background: linear-gradient(135deg, var(--green-neon), var(--green-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  position: relative;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 48px;
  line-height: 1.9;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 60px;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.btn-primary {
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--green-neon), var(--green-mid));
  color: #000;
  font-weight: 700;
  font-size: 1.05rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-ar);
  box-shadow: 0 4px 30px var(--green-glow);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 50px var(--green-glow);
}

.btn-secondary {
  padding: 16px 40px;
  background: transparent;
  color: var(--green-neon);
  font-weight: 600;
  font-size: 1.05rem;
  border: 1px solid var(--green-neon);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-ar);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-secondary:hover {
  background: rgba(0, 255, 136, 0.06);
  border-color: var(--green-neon);
  color: var(--green-neon);
  transform: translateY(-3px);
}

/* 3D Robot Container */
.robot-container {
  width: 100%;
  max-width: 600px;
  height: 500px;
  margin: 0 auto;
  position: relative;
  animation: fadeInUp 1s ease 0.8s both;
}

.robot-container model-viewer {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  --poster-color: transparent;
}

.robot-container model-viewer::part(default-progress-bar) {
  display: none;
}

.robot-glow-ring {
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 50px;
  background: radial-gradient(ellipse, var(--green-glow), transparent 70%);
  animation: glow-pulse 3s ease-in-out infinite;
  pointer-events: none;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.2); }
}

/* Grid lines on hero background */
.hero-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(0, 255, 136, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 136, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
}

/* =====================
   COURSES SECTION
   ===================== */
.courses {
  padding: 120px 0;
  position: relative;
  z-index: 2;
}

.courses-header {
  text-align: center;
  margin-bottom: 64px;
}

.courses-header .section-subtitle {
  margin: 0 auto;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 24px;
}

.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--green-neon), transparent);
  opacity: 0;
  transition: var(--transition);
}

.course-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 255, 136, 0.1);
}

.course-card:hover::before {
  opacity: 1;
}

.course-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 24px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.course-card:hover .course-icon {
  background: rgba(0, 255, 136, 0.15);
  border-color: var(--green-neon);
  box-shadow: 0 0 25px var(--green-glow);
}

.course-number {
  position: absolute;
  top: 20px;
  left: 20px;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--green-neon);
  background: rgba(0, 255, 136, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.course-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.course-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.course-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--green-neon);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition-fast);
}

.course-link:hover {
  gap: 14px;
}

.course-link svg {
  transition: var(--transition-fast);
  transform: rotate(180deg);
}

.course-link:hover svg {
  transform: rotate(180deg) translateX(4px);
}

/* =====================
   AI MENTOR SECTION
   ===================== */
.ai-mentor {
  padding: 120px 0;
  position: relative;
  z-index: 2;
}

.ai-mentor .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.ai-mentor-info .section-subtitle {
  margin-bottom: 32px;
}

.ai-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.ai-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.ai-feature-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.ai-feature h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.ai-feature p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Chat Preview */
.chat-preview {
  background: rgba(0, 20, 10, 0.4);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  max-height: 520px;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 255, 136, 0.03);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-neon), var(--green-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 0 15px var(--green-glow);
}

.chat-header-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
}

.chat-header-info span {
  font-size: 0.8rem;
  color: var(--green-neon);
}

.chat-messages {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 200px;
  max-height: 360px;
  overflow-y: auto;
  scroll-behavior: smooth;
  flex: 1;
}

/* Custom Scrollbar for Chat */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(0, 255, 136, 0.25);
  border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 255, 136, 0.45);
}

.chat-message {
  max-width: 85%;
  padding: 14px 20px;
  border-radius: 20px;
  font-size: 0.9rem;
  line-height: 1.8;
  animation: messageSlide 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
  position: relative;
  word-wrap: break-word;
}

.chat-message.bot {
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid var(--border-color);
  border-radius: 20px 20px 20px 6px;
  align-self: flex-start;
}

.chat-message.user {
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.2), rgba(0, 255, 136, 0.08));
  border: 1px solid var(--border-hover);
  border-radius: 20px 20px 6px 20px;
  align-self: flex-end;
  box-shadow: 0 4px 15px rgba(0, 255, 136, 0.08);
}

/* Typing Indicator */
.typing-indicator {
  display: none;
  align-self: flex-start;
  padding: 14px 22px;
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid var(--border-color);
  border-radius: 20px 20px 20px 6px;
  gap: 5px;
  align-items: center;
}

.typing-indicator.active {
  display: flex;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--green-neon);
  border-radius: 50%;
  opacity: 0.4;
  animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-8px); opacity: 1; }
}

@keyframes messageSlide {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.chat-input {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  background: rgba(0, 255, 136, 0.02);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.chat-input input {
  flex: 1;
  background: rgba(0, 255, 136, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 12px 16px;
  color: var(--text-primary);
  font-family: var(--font-ar);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition-fast);
  direction: rtl;
}

.chat-input input:focus {
  border-color: var(--green-neon);
  box-shadow: 0 0 15px var(--green-glow);
}

.chat-input input::placeholder {
  color: var(--text-muted);
}

.chat-send-btn {
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--green-neon), var(--green-mid));
  color: #000;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
  box-shadow: 0 0 15px var(--green-glow);
}

.chat-send-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px var(--green-glow);
}

/* =====================
   FEATURES SECTION
   ===================== */
.features {
  padding: 120px 0;
  position: relative;
  z-index: 2;
}

.features-header {
  text-align: center;
  margin-bottom: 64px;
}

.features-header .section-subtitle {
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--green-neon);
  transition: var(--transition);
  box-shadow: 0 0 15px var(--green-glow);
}

.feature-card:hover::after {
  width: 60%;
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.feature-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 20px;
  transition: var(--transition);
}

.feature-card:hover .feature-icon {
  background: rgba(0, 255, 136, 0.15);
  box-shadow: 0 0 30px var(--green-glow);
  border-color: var(--green-neon);
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* =====================
   STATS BAR
   ===================== */
.stats {
  padding: 60px 0;
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(0, 255, 136, 0.02);
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item h3 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 900;
  color: var(--green-neon);
  font-family: var(--font-en);
  text-shadow: 0 0 20px var(--green-glow);
  margin-bottom: 8px;
}

.stat-item p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* =====================
   FOOTER
   ===================== */
.footer {
  padding: 80px 0 30px;
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand .nav-brand {
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(0, 255, 136, 0.06);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--green-neon);
  color: #000;
  border-color: var(--green-neon);
  box-shadow: 0 0 20px var(--green-glow);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--green-neon);
  padding-right: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* =====================
   SCROLL ANIMATIONS
   ===================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* =====================
   KEYFRAMES
   ===================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

/* =====================
   RESPONSIVE 
   ===================== */
@media (max-width: 1024px) {
  .ai-mentor .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .navbar .container {
    padding: 0 20px;
  }
  .nav-brand {
    font-size: 1.2rem;
    gap: 8px;
  }
  .nav-brand .brand-icon {
    width: 36px;
    height: 36px;
  }
  .nav-univ-logos {
    gap: 8px;
  }
  .nav-univ-logos img {
    height: 36px;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    padding: 40px;
    transition: var(--transition);
    border-left: 1px solid var(--border-color);
  }

  .nav-links.open {
    right: 0;
  }

  .menu-toggle {
    display: flex;
  }

  .hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
  }

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

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

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

  .stats .container {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .robot-container {
    height: 350px;
  }
}

@media (max-width: 480px) {
  .navbar .container {
    padding: 0 16px;
  }
  .nav-brand {
    font-size: 1rem;
    gap: 6px;
  }
  .nav-brand .brand-icon {
    width: 32px;
    height: 32px;
  }
  .nav-univ-logos {
    gap: 6px;
  }
  .nav-univ-logos img {
    height: 28px;
    padding: 2px;
  }

  .hero {
    padding: 100px 0 0;
  }

  .robot-container {
    height: 280px;
  }

  .section-title {
    font-size: 1.8rem;
  }
}

/* =====================
   CHATBOT FLOATING BUTTON
   ===================== */
.chatbot-fab {
  position: fixed;
  bottom: 30px;
  left: 30px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-neon), var(--green-mid));
  color: #000;
  border: none;
  cursor: pointer;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 4px 30px var(--green-glow);
  transition: var(--transition);
  animation: float 3s ease-in-out infinite;
}

.chatbot-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 50px var(--green-glow);
}

/* Floating Chat Panel */
.chatbot-panel {
  position: fixed;
  bottom: 100px;
  left: 30px;
  width: 420px;
  max-height: 560px;
  border-radius: var(--radius-xl);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  background: rgba(0, 5, 2, 0.97);
  backdrop-filter: blur(30px);
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 255, 136, 0.05);
}

.chatbot-panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.chatbot-panel .chat-messages {
  max-height: 380px;
  flex: 1;
  min-height: 0;
}

/* Close button in floating chat */
.chat-close-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition-fast);
  margin-right: auto;
}

.chat-close-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
  transform: rotate(90deg);
}

/* Light mode close button */
[data-theme="light"] .chat-close-btn {
  background: rgba(0, 0, 0, 0.05);
  color: #475569;
}

[data-theme="light"] .chat-close-btn:hover {
  background: rgba(0, 0, 0, 0.1);
  color: #0f172a;
}

/* Light mode scrollbar */
[data-theme="light"] .chat-messages::-webkit-scrollbar-thumb {
  background: rgba(0, 164, 85, 0.2);
}

[data-theme="light"] .chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 164, 85, 0.4);
}

/* Light mode typing indicator */
[data-theme="light"] .typing-indicator {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
}

[data-theme="light"] .typing-indicator span {
  background: #00a455;
}

/* Responsive chatbot panel */
@media (max-width: 480px) {
  .chatbot-panel {
    width: calc(100vw - 24px);
    left: 12px;
    bottom: 90px;
    max-height: 450px;
  }
}
/* =====================
   MY CERTIFICATES
   ===================== */
.my-certificates {
  padding: 100px 0;
  background: var(--bg-secondary);
  position: relative;
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
  margin-top: 50px;
}

.certificate-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  gap: 20px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.certificate-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--green-neon), transparent 40%);
  opacity: 0.03;
  transition: var(--transition);
  pointer-events: none;
}

.certificate-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: 0 15px 40px rgba(0, 255, 136, 0.08);
}

.certificate-card:hover::before {
  opacity: 0.08;
}

.cert-card-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 255, 136, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--green-neon);
  flex-shrink: 0;
  border: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
}

.cert-card-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.cert-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.cert-card-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
}

.cert-card-score {
  font-family: var(--font-en);
  font-weight: 800;
  color: var(--green-neon);
  background: rgba(0, 255, 136, 0.1);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.85rem;
}

.cert-card-date {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.cert-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.cert-card-id {
  font-family: var(--font-en);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.cert-view-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--green-neon);
  transition: var(--transition-fast);
}

.cert-view-btn i {
  transition: var(--transition-fast);
}

.cert-view-btn:hover {
  text-shadow: 0 0 10px var(--green-glow);
}

.cert-view-btn:hover i {
  transform: translateX(-4px);
}

/* Light Theme Adjustments for Certificates */
[data-theme="light"] .certificate-card {
  background: #ffffff;
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

[data-theme="light"] .cert-card-icon {
  background: rgba(0, 164, 85, 0.05);
  color: #00a455;
  border-color: rgba(0, 164, 85, 0.1);
}

[data-theme="light"] .cert-card-score {
  background: rgba(0, 164, 85, 0.1);
  color: #008744;
}

@media (max-width: 768px) {
  .certificates-grid {
    grid-template-columns: 1fr;
  }
  
  .certificate-card {
    padding: 20px;
  }
}