/* ============================================
   Ahmed Mahmoud Portfolio - Premium Dark Mode
   ============================================ */

/* ============================================
   CSS Variables & Design Tokens
   ============================================ */
:root {
  /* Colors */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: rgba(26, 26, 37, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);

  /* Accent Colors */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-tertiary: #a78bfa;
  --accent-glow: rgba(99, 102, 241, 0.3);

  /* Gradient */
  --gradient-primary: linear-gradient(
    135deg,
    #6366f1 0%,
    #8b5cf6 50%,
    #a78bfa 100%
  );
  --gradient-subtle: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.1) 0%,
    rgba(139, 92, 246, 0.1) 100%
  );
  --gradient-glow: radial-gradient(
    circle at center,
    rgba(99, 102, 241, 0.15) 0%,
    transparent 70%
  );

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --text-muted: #52525b;

  /* Borders */
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);

  /* Typography */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-arabic: "Cairo", sans-serif;

  /* Spacing */
  --section-padding: 100px 0;
  --container-max: 1200px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --radius-full: 50%;
}

/* RTL Support */
html[dir="rtl"] {
  --font-primary: "Cairo", sans-serif;
}

/* ============================================
   Light Mode Variables
   ============================================ */
html[data-theme="light"] {
  /* Light Mode Backgrounds */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-glass: rgba(255, 255, 255, 0.7);

  /* Text Colors - Optimized for Light */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-muted: #94a3b8;

  /* Accent Colors - Keep vibrant */
  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-tertiary: #a78bfa;
  --accent-glow: rgba(99, 102, 241, 0.25);

  /* Borders */
  --border-color: rgba(15, 23, 42, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);

  /* Shadows - Softer for light mode */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 24px rgba(99, 102, 241, 0.2);

  /* Gradients - Adjusted for light mode */
  --gradient-primary: linear-gradient(
    135deg,
    #6366f1 0%,
    #8b5cf6 50%,
    #a78bfa 100%
  );
  --gradient-subtle: linear-gradient(
    135deg,
    rgba(99, 102, 241, 0.08) 0%,
    rgba(139, 92, 246, 0.08) 100%
  );
  --gradient-glow: radial-gradient(
    circle at center,
    rgba(99, 102, 241, 0.12) 0%,
    transparent 70%
  );
}

/* Light Mode Component Overrides */
html[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

html[data-theme="light"] .project-card,
html[data-theme="light"] .timeline-content,
html[data-theme="light"] .skill-category {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

html[data-theme="light"] .floating-card {
  background: var(--bg-secondary);
  box-shadow: var(--shadow-md);
}

html[data-theme="light"] .hero-bg {
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
}

html[data-theme="light"] .section {
  background: var(--bg-primary);
}

html[data-theme="light"] .section:nth-child(even) {
  background: var(--bg-secondary);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE and Edge */
}

/* Hide Scrollbar for Chrome, Safari and Opera */
::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

body {
  font-family: var(--font-primary);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE and Edge */
}

html[dir="rtl"] body {
  font-family: var(--font-arabic);
}

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

ul {
  list-style: none;
}

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

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

/* ============================================
   Utility Classes
   ============================================ */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-padding);
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.2) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: var(--transition-normal);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

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

.btn-primary:hover i {
  transform: translateX(5px);
}

.btn-primary i {
  transition: var(--transition-normal);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-primary);
  transform: translateY(-3px);
}

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

.btn-outline:hover {
  background: var(--accent-primary);
  color: white;
  transform: translateY(-3px);
}


/* Theme Toggle Button */
.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.15);
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  margin-right: 12px;
}

.theme-toggle i {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--accent-primary);
}

.theme-toggle:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.theme-toggle:hover i {
  color: white;
}

/* Smooth Theme Transitions */
html,
body {
  transition: background-color 0.3s ease, color 0.3s ease;
}

.navbar,
.hero,
.section,
.card,
.btn,
.project-card,
.timeline-item {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

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

@keyframes fadeLeft {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

@keyframes blink {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0;
  }
}

@keyframes glow {
  0%,
  100% {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.5);
  }
}

@keyframes scroll {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(8px);
    opacity: 0;
  }
}

.animate-fade-up {
  animation: fadeUp 0.8s ease forwards;
}

.animate-fade-left {
  animation: fadeLeft 0.8s ease forwards;
}

.delay-1 {
  animation-delay: 0.1s;
}
.delay-2 {
  animation-delay: 0.2s;
}
.delay-3 {
  animation-delay: 0.3s;
}
.delay-4 {
  animation-delay: 0.4s;
}
.delay-5 {
  animation-delay: 0.5s;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(20px);
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-normal);
}

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

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition-normal);
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: var(--accent-primary);
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
}

.hamburger {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: var(--transition-normal);
}

.hamburger::before,
.hamburger::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  left: 0;
  transition: var(--transition-normal);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  bottom: -8px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-gradient {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: var(--gradient-glow);
  filter: blur(100px);
  animation: pulse 8s ease-in-out infinite;
}

.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text {
  opacity: 0;
  animation: fadeUp 0.8s ease forwards;
}

.hero-greeting {
  margin-bottom: 12px;
}

.greeting-text {
  font-size: 1.125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-title {
  margin-bottom: 16px;
}

.name-text {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.hero-subtitle {
  margin-bottom: 24px;
  min-height: 40px;
}

.typed-text {
  font-size: 1.5rem;
  color: var(--text-primary);
  font-weight: 600;
}

.cursor {
  font-size: 1.5rem;
  color: var(--accent-primary);
  animation: blink 1s infinite;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.hero-social {
  display: flex;
  gap: 16px;
}

.social-link {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: var(--transition-normal);
}

.social-link:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

/* Hero Image */
.hero-image {
  position: relative;
  opacity: 0;
  animation: fadeLeft 0.8s ease 0.3s forwards;
}

.image-wrapper {
  position: relative;
  width: 400px;
  height: 400px;
  margin: 0 auto;
}

.image-glow {
  position: absolute;
  inset: -20px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0.2;
  filter: blur(40px);
  animation: glow 4s ease-in-out infinite;
}

.profile-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-full);
  position: relative;
  z-index: 2;
}

.image-border {
  position: absolute;
  inset: -4px;
  border: 3px solid transparent;
  border-radius: var(--radius-full);
  background: var(--gradient-primary) border-box;
  -webkit-mask:
    linear-gradient(#fff 0 0) padding-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  z-index: 1;
}

/* Floating Cards */
.floating-card {
  position: absolute;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float 4s ease-in-out infinite;
  z-index: 10;
}

.card-experience {
  top: 10%;
  left: -30px;
  animation-delay: 0s;
}

.card-students {
  bottom: 20%;
  left: -50px;
  animation-delay: 1s;
}

.card-rating {
  top: 30%;
  right: -40px;
  animation-delay: 2s;
}

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 1.125rem;
}

.card-content {
  display: flex;
  flex-direction: column;
}

.card-number {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-tertiary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.scroll-mouse {
  width: 26px;
  height: 40px;
  border: 2px solid var(--text-tertiary);
  border-radius: 13px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.scroll-wheel {
  width: 4px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 2px;
  animation: scroll 2s ease-in-out infinite;
}

/* ============================================
   About Section
   ============================================ */
.about-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.stat-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-size: 1.25rem;
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  display: inline;
}

.stat-plus {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ============================================
   Skills Section
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.skill-category {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition-normal);
}

.skill-category:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.category-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 1.25rem;
}

.category-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: var(--transition-normal);
}

.skill-item:hover {
  background: var(--gradient-subtle);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.skill-item i {
  color: var(--accent-primary);
  font-size: 1rem;
}

/* ============================================
   Experience Section (Timeline)
   ============================================ */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: 50px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-full);
  color: var(--accent-primary);
  font-size: 0.875rem;
  z-index: 1;
}

.timeline-content {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition-normal);
}

.timeline-content:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.timeline-date {
  font-size: 0.875rem;
  color: var(--accent-primary);
  font-weight: 500;
}

.timeline-badge {
  font-size: 0.75rem;
  padding: 4px 12px;
  background: var(--gradient-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-weight: 500;
}

.timeline-badge.current {
  background: var(--gradient-primary);
  color: white;
}

.timeline-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.timeline-company {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timeline-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.timeline-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
}

/* ============================================
   Projects Section
   ============================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
  margin-bottom: 40px;
}

.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
}

.project-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow);
}

.project-card.featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
}

.project-image {
  position: relative;
  height: 280px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
}

.project-card.featured .project-image {
  height: 100%;
  min-height: 350px;
}

.project-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  font-size: 4rem;
  color: var(--accent-primary);
}

.project-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: var(--transition-normal);
}

.project-card:hover .project-img {
  transform: scale(1.03);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-normal);
  z-index: 10;
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 16px;
}

.project-link {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  color: white;
  font-size: 1.125rem;
  transition: var(--transition-normal);
}

.project-link:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow);
}

.project-status {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  font-weight: 500;
}

.project-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 8px 16px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  z-index: 1;
}

html[dir="rtl"] .project-badge {
  right: auto;
  left: 16px;
}

.project-content {
  padding: 24px;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.project-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.project-tech span {
  padding: 6px 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.project-rating {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #fbbf24;
  font-size: 0.9rem;
}

.project-rating span {
  margin-left: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

html[dir="rtl"] .project-rating span {
  margin-left: 0;
  margin-right: 8px;
}

.projects-cta {
  text-align: center;
}

/* ============================================
   Teaching Section
   ============================================ */
.teaching-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.teaching-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.teaching-intro p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.teaching-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.teaching-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  text-align: center;
  transition: var(--transition-normal);
}

.teaching-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-10px);
  box-shadow: var(--shadow-glow);
}

.teaching-icon {
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: white;
  font-size: 1.75rem;
  margin: 0 auto 20px;
}

.teaching-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.teaching-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.teaching-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.teaching-stats span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.teaching-stats i {
  color: var(--accent-primary);
}

.teaching-highlight {
  background: var(--gradient-subtle);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.highlight-content {
  display: flex;
  align-items: center;
  gap: 24px;
  justify-content: center;
}

.highlight-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  color: white;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.highlight-text h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.highlight-text p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ============================================
   Education Section
   ============================================ */
.education-grid {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.education-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  align-items: center;
  gap: 24px;
  transition: var(--transition-normal);
}

.education-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.education-card.degree {
  background: var(--gradient-subtle);
  border-color: var(--border-glow);
}

.education-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  color: white;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.education-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.education-content h4 {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 8px;
}

.education-date {
  font-size: 0.875rem;
  color: var(--accent-primary);
  font-weight: 500;
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.certificate-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: var(--transition-normal);
}

.certificate-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
}

.certificate-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-size: 1.25rem;
  margin: 0 auto 16px;
}

.certificate-card h4 {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ============================================
   Contact Section
   ============================================ */
.contact-content {
  max-width: 800px;
  margin: 0 auto;
}

.contact-info {
  text-align: center;
}

.contact-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.contact-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition-normal);
}

.contact-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.contact-card-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-subtle);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-card:hover .contact-card-icon {
  background: var(--gradient-primary);
  color: white;
}

.contact-card-info {
  display: flex;
  flex-direction: column;
  text-align: left;
}

html[dir="rtl"] .contact-card-info {
  text-align: right;
}

.contact-card-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.contact-card-value {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-logo {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 1.125rem;
  transition: var(--transition-normal);
}

.footer-social a:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
  transform: translateY(-3px);
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }

  .hero-text {
    order: 1;
  }

  .hero-image {
    order: 0;
  }

  .hero-description {
    max-width: 100%;
  }

  .hero-cta,
  .hero-social {
    justify-content: center;
  }

  .image-wrapper {
    width: 300px;
    height: 300px;
  }

  .floating-card {
    display: none;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

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

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

  .project-card.featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .project-card.featured .project-image {
    min-height: 200px;
  }

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

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--bg-primary);
    flex-direction: column;
    justify-content: center;
    gap: 30px;
    transition: var(--transition-normal);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-link {
    font-size: 1.25rem;
  }

  .mobile-menu-btn {
    display: flex;
    z-index: 1001;
  }

  .mobile-menu-btn.active .hamburger {
    background: transparent;
  }

  .mobile-menu-btn.active .hamburger::before {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active .hamburger::after {
    transform: rotate(-45deg) translate(5px, -5px);
  }

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

  .project-card.featured {
    grid-column: span 1;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }

  .contact-cards {
    grid-template-columns: 1fr;
  }

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

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

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

  .scroll-indicator {
    display: none;
  }
}

@media (max-width: 480px) {
  .image-wrapper {
    width: 250px;
    height: 250px;
  }

  .hero-title .name-text {
    font-size: 2rem;
  }

  .typed-text,
  .cursor {
    font-size: 1.125rem;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline::before {
    left: 11px;
  }

  .timeline-marker {
    left: -30px;
    width: 24px;
    height: 24px;
    font-size: 0.75rem;
  }

  .timeline-content {
    padding: 20px;
  }
}