/* =========================================
   1. VISUAL SYSTEM & DESIGN TOKENS
   ========================================= */
:root {
  --bg-color: #FFFFFF;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --accent: #FF6A00;
  --accent-glow: rgba(255, 106, 0, 0.15);
  --card-bg: #FAFAFA;
  --border-color: #E2E8F0;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-code: 'Fira Code', monospace;
  --nav-height: 80px;
  --nav-height-mobile: 68px;
  --container-max: 1280px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================
   2. RESET & GLOBAL STYLES
   ========================================= */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

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

html, body {
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
  position: relative;
  scrollbar-width: none; /* Firefox */
  -ms-overflow-style: none; /* IE/Edge */
}

html::-webkit-scrollbar, body::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-bottom: env(safe-area-inset-bottom);
}

section {
  scroll-margin-top: var(--nav-height);
  position: relative;
  width: 100%;
}

@media (max-width: 768px) {
  section {
    scroll-margin-top: var(--nav-height-mobile);
  }
}

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

ul {
  list-style: none;
}

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

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* =========================================
   3. UTILITY CLASSES & ANIMATIONS
   ========================================= */
.section-padding {
  padding: 100px 0;
}

@media (max-width: 768px) {
  .section-padding {
    padding: 64px 0;
  }
}

@media (max-width: 480px) {
  .section-padding {
    padding: 48px 0;
  }
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 56px auto;
}

@media (max-width: 768px) {
  .section-header {
    margin-bottom: 36px;
  }
}

.section-title {
  font-size: clamp(1.75rem, 6vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: clamp(0.9375rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.6;
}

/* Thumb-Friendly Buttons (Min 48px height) */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 9999px;
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
  border: 1px solid transparent;
  user-select: none;
  white-space: nowrap;
  text-align: center;
}

@media (max-width: 480px) {
  .btn {
    padding: 12px 24px;
    font-size: 0.875rem;
  }
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-color);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

@media (hover: hover) {
  .btn-primary:hover {
    background-color: var(--accent);
    color: #FFFFFF;
    box-shadow: 0 6px 20px rgba(255, 106, 0, 0.3);
    transform: translateY(-2px);
  }
}

.btn-accent {
  background-color: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(255, 106, 0, 0.25);
}

@media (hover: hover) {
  .btn-accent:hover {
    background-color: #E05E00;
    box-shadow: 0 6px 20px rgba(255, 106, 0, 0.4);
    transform: translateY(-2px);
  }
}

/* Button Ripple Effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: ripple-anim 0.6s linear;
  pointer-events: none;
}

@keyframes ripple-anim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* IntersectionObserver Fade-Up Animation */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* Hover Lift Effect */
.hover-lift {
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

@media (hover: hover) and (pointer: fine) {
  .hover-lift:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    border-color: rgba(255, 106, 0, 0.4);
  }
}

/* =========================================
   4. STICKY NAVIGATION
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: background-color var(--transition-fast), border-bottom var(--transition-fast), backdrop-filter var(--transition-fast), height var(--transition-fast);
  border-bottom: 1px solid transparent;
  display: flex;
  align-items: center;
}

@media (max-width: 768px) {
  .navbar {
    height: var(--nav-height-mobile);
  }
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-mark {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1001;
}

@media (max-width: 480px) {
  .brand-mark {
    font-size: 1.125rem;
  }
}

.brand-mark .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--text-primary);
  color: var(--bg-color);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  font-weight: 800;
  transition: background-color var(--transition-fast);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

@media (hover: hover) {
  .brand-mark:hover .logo-icon {
    background: var(--accent);
  }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--accent);
  transition: width var(--transition-fast);
}

@media (hover: hover) {
  .nav-link:hover::after {
    width: 100%;
  }
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast);
  z-index: 1001;
}

.mobile-toggle:active {
  background-color: #F1F5F9;
}

@media (max-width: 992px) {
  .nav-links, .nav-actions .btn {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
}

/* Premium Glassmorphic Mobile Menu Drawer */
.mobile-menu {
  position: fixed;
  top: var(--nav-height-mobile);
  left: 0;
  width: 100%;
  max-height: calc(100vh - var(--nav-height-mobile));
  overflow-y: auto;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 24px 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
  transform: translateY(-150%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
  z-index: 999;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu .nav-link {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 14px 16px;
  border-radius: 12px;
  transition: background-color var(--transition-fast);
}

.mobile-menu .nav-link:active {
  background-color: #F1F5F9;
}

/* =========================================
   5. SECTION 1: HERO SECTION
   ========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 80px;
  overflow: hidden;
  width: 100%;
}

@media (max-width: 992px) {
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height-mobile) + 36px);
    padding-bottom: 56px;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: calc(var(--nav-height-mobile) + 24px);
    padding-bottom: 48px;
  }
}

.hero-glow {
  position: absolute;
  top: 15%;
  left: 45%;
  width: min(700px, 90vw);
  height: 500px;
  background: radial-gradient(circle, rgba(255, 106, 0, 0.14) 0%, rgba(14, 165, 233, 0.08) 50%, rgba(255,255,255,0) 80%);
  filter: blur(80px);
  z-index: 0;
  pointer-events: none;
}

@media (max-width: 768px) {
  .hero-glow {
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
  }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 64px;
  position: relative;
  z-index: 1;
  width: 100%;
}

@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
    width: 100%;
    max-width: 100%;
  }
}

/* CRITICAL DESKTOP & MOBILE FIX: 
   max-width: 640px preserves desktop design. 
   min-width: 0 prevents CSS Grid blowout from wide code/marquee elements! */
.hero-content {
  max-width: 640px;
  min-width: 0;
}

@media (max-width: 992px) {
  .hero-content {
    margin: 0 auto;
    width: 100%;
    max-width: 100%;
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background-color: #F1F5F9;
  border: 1px solid #CBD5E1;
  border-radius: 9999px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  max-width: 100%;
  box-sizing: border-box;
}

@media (max-width: 480px) {
  .badge {
    font-size: 0.7rem;
    padding: 5px 12px;
    margin-bottom: 16px;
  }
}

.badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background-color: #10B981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10B981;
  display: inline-block;
  flex-shrink: 0;
}

.hero-title {
  font-size: clamp(2rem, 7vw, 4.25rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 20px;
  color: var(--text-primary);
  word-wrap: break-word;
}

.hero-title span {
  background: linear-gradient(135deg, #FF6A00 0%, #EE0979 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

@media (max-width: 768px) {
  .hero-title span {
    display: inline;
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
  }
}

.hero-subtitle {
  font-size: clamp(0.9375rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-weight: 400;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 40px;
}

@media (max-width: 992px) {
  .hero-buttons {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .hero-buttons .btn {
    width: 100%;
  }
}

/* Infinite Silicon Valley Marquee */
.company-trust-section {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  overflow: hidden;
  width: 100%;
  max-width: 100%;
}

.company-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94A3B8;
  margin-bottom: 16px;
}

.marquee-container {
  display: flex;
  overflow: hidden;
  user-select: none;
  width: 100%;
  max-width: 100%;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 36px;
  flex-shrink: 0;
  width: max-content;
  animation: scroll-marquee 25s linear infinite;
}

@keyframes scroll-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.company-logo {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #64748B;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.company-logo i {
  font-size: 1.25rem;
}

@media (hover: hover) {
  .company-logo:hover {
    color: var(--text-primary);
  }
}

/* Tech Interactive Illustration */
.hero-visual-wrapper {
  position: relative;
  width: 100%;
  max-width: 100%;
  min-width: 0; /* Keeps grid column 2 stable on desktop */
  display: flex;
  justify-content: center;
  perspective: 1000px;
}

.tech-card {
  width: 100%;
  max-width: 480px;
  background: #0F172A;
  border: 1px solid #334155;
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  color: #FFFFFF;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.1s ease-out;
  text-align: left;
  box-sizing: border-box;
}

@media (max-width: 480px) {
  .tech-card {
    padding: 16px;
    border-radius: 16px;
    max-width: 100%;
    overflow: hidden;
  }
}

.tech-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid #1E293B;
  margin-bottom: 16px;
  gap: 8px;
}

@media (max-width: 480px) {
  .tech-card-header {
    flex-wrap: wrap;
    gap: 10px;
  }
}

.terminal-dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #EF4444; }
.dot-yellow { background: #F59E0B; }
.dot-green { background: #10B981; }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(16, 185, 129, 0.1);
  color: #34D399;
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: 4px 10px;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .status-badge {
    font-size: 0.65rem;
    padding: 3px 8px;
  }
}

.code-preview {
  font-family: var(--font-code);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: #E2E8F0;
  background: #1E293B;
  padding: 16px;
  border-radius: 12px;
  margin-bottom: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #475569 #1E293B;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

@media (max-width: 480px) {
  .code-preview {
    font-size: 0.725rem;
    padding: 12px;
  }
}

.code-keyword { color: #F43F5E; font-weight: 600; }
.code-func { color: #38BDF8; font-weight: 600; }
.code-var { color: #FBBF24; }
.code-comment { color: #64748B; font-style: italic; }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.metric-box {
  background: #1E293B;
  border: 1px solid #334155;
  padding: 12px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.metric-title {
  font-size: 0.6875rem;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.metric-value {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #38BDF8;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Floating Success Pill */
.floating-pill {
  position: absolute;
  bottom: -18px;
  right: -18px;
  background: #FFFFFF;
  color: #0F172A;
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.12);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.8125rem;
  animation: float-main 5s ease-in-out infinite;
  z-index: 10;
}

@media (max-width: 768px) {
  .floating-pill {
    right: 10px;
    bottom: -12px;
  }
}

@media (max-width: 480px) {
  .floating-pill {
    right: 12px;
    bottom: 12px;
    padding: 8px 12px;
    font-size: 0.75rem;
    border-radius: 12px;
  }
}

.floating-pill-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: #F0FDF4;
  color: #16A34A;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

@keyframes float-main {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* =========================================
   6. SECTION 2: STATISTICS
   ========================================= */
.stats-section {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 48px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 16px;
  }
}

@media (max-width: 360px) {
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.stat-number {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 6px;
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}

.stat-number span { color: var(--accent); }
.stat-label { font-size: 0.875rem; font-weight: 600; color: var(--text-secondary); }

/* =========================================
   7. SECTION 3: FEATURED COURSES
   ========================================= */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

@media (max-width: 992px) {
  .courses-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.course-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.02);
}

@media (max-width: 480px) {
  .course-card {
    padding: 24px 16px;
    border-radius: 20px;
  }
}

.course-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--text-primary);
  transition: background-color var(--transition-fast);
}

@media (hover: hover) {
  .course-card:hover::before { background: var(--accent); }
}

.course-thumbnail-wrapper {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 20px;
  background-color: #EAEAEA;
  border: 1px solid var(--border-color);
  position: relative;
  display: block; /* Ensures clean behavior when used as an <a> tag */
}

.course-thumbnail-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

@media (hover: hover) {
  .course-card:hover .course-thumbnail-wrapper img { transform: scale(1.03); }
}

.course-tag {
  align-self: flex-start;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  color: var(--accent);
  display: inline-block;
}

.course-title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
  color: var(--text-primary);
  line-height: 1.25;
}

.course-subtitle {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 24px;
  font-weight: 400;
  line-height: 1.6;
}

.course-highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.highlight-item i {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.875rem;
  flex-shrink: 0;
}

.course-action {
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* Custom Responsive Pills */
.pill-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 8px 12px;
  border-radius: 9999px;
  border: 1px solid transparent;
  user-select: none;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .badge-pill {
    font-size: 0.7rem;
    padding: 6px 10px;
  }
}

.pill-discount {
  background-color: #FFF5F0;
  color: #DE4C13;
  border-color: #FFE0D1;
}
.pill-discount i { color: #DE4C13; }

.pill-lifetime {
  background-color: #F0FDF4;
  color: #0F766E;
  border-color: #D1FAE5;
}
.pill-lifetime i { color: #0F766E; }

.pill-udemy {
  background-color: #F5F3FF;
  color: #6D28D9;
  border-color: #EDE9FE;
}
.pill-udemy i { color: #6D28D9; }

/* =========================================
   8. SECTION 4: WHY LEARN WITH ME
   ========================================= */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 992px) {
  .why-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .why-grid { grid-template-columns: 1fr; gap: 16px; }
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

@media (max-width: 480px) {
  .feature-card {
    padding: 22px;
    border-radius: 16px;
  }
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.03);
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* =========================================
   9. SECTION 5: ABOUT THE INSTRUCTOR
   ========================================= */
.about-section {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.about-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 64px;
  max-width: 1000px;
  margin: 0 auto;
}

@media (max-width: 800px) {
  .about-container {
    flex-direction: column;
    text-align: center;
    gap: 36px;
  }
}

.about-image-wrapper {
  flex-shrink: 0;
  position: relative;
}

.profile-photo-container {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--border-color);
  border: 4px solid #FFFFFF;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 480px) {
  .profile-photo-container {
    width: 160px;
    height: 160px;
  }
}

.profile-photo-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-decoration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  width: 42px;
  height: 42px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 1.125rem;
  border: 3px solid #FFFFFF;
  z-index: 3;
}

@media (max-width: 480px) {
  .about-decoration {
    width: 36px;
    height: 36px;
    font-size: 0.9375rem;
    bottom: 4px;
    right: 4px;
  }
}

.about-content { flex: 1; }
.about-tag { font-size: 0.8125rem; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; display: inline-block; }
.about-title { font-size: clamp(1.5rem, 4vw, 2.5rem); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 16px; line-height: 1.2; }
.about-bio { font-size: 1.125rem; font-weight: 400; color: var(--text-secondary); line-height: 1.6; margin-bottom: 20px; }

.about-stats {
  display: flex;
  gap: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

@media (max-width: 800px) {
  .about-stats {
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px 32px;
  }
}

.about-stat-item { display: flex; flex-direction: column; }
.about-stat-val { font-size: 1.35rem; font-weight: 800; color: var(--text-primary); }
.about-stat-label { font-size: 0.75rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; }

/* =========================================
   10. SECTION 6: TESTIMONIALS
   ========================================= */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 992px) {
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .testimonials-grid { grid-template-columns: 1fr; gap: 16px; }
}

.testimonial-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

@media (max-width: 480px) {
  .testimonial-card {
    padding: 22px;
    border-radius: 16px;
  }
}

.stars { color: #FFB800; font-size: 0.875rem; display: flex; gap: 4px; }
.quote-text { font-size: 0.9375rem; color: var(--text-primary); line-height: 1.6; font-style: italic; }
.author-info { display: flex; align-items: center; gap: 12px; padding-top: 14px; border-top: 1px solid var(--border-color); }
.author-avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--border-color); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 0.8125rem; color: var(--text-secondary); flex-shrink: 0; }
.author-details h4 { font-size: 0.875rem; font-weight: 600; color: var(--text-primary); }
.author-details p { font-size: 0.75rem; color: var(--text-secondary); }

/* =========================================
   11. SECTION 7: FAQ ACCORDION
   ========================================= */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

@media (hover: hover) {
  .faq-item:hover { border-color: #CBD5E1; }
}

.faq-question {
  width: 100%;
  min-height: 56px;
  padding: 18px 20px;
  text-align: left;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}

@media (max-width: 480px) {
  .faq-question {
    padding: 16px;
    font-size: 0.9375rem;
  }
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform var(--transition-smooth), background-color var(--transition-fast), color var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  background: var(--text-primary);
  color: var(--bg-color);
}

.faq-answer { max-height: 0; overflow: hidden; transition: max-height var(--transition-smooth); }
.faq-answer-inner { padding: 0 20px 20px 20px; color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.6; }

@media (max-width: 480px) {
  .faq-answer-inner {
    padding: 0 16px 16px 16px;
    font-size: 0.875rem;
  }
}

.language-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.language-chips span {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 9999px;
}

/* =========================================
   12. SECTION 8: CALL TO ACTION
   ========================================= */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: var(--text-primary);
  color: var(--bg-color);
  text-align: center;
  overflow: hidden;
}

@media (max-width: 768px) {
  .cta-section {
    padding: 64px 0;
  }
}

.cta-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(500px, 90vw);
  height: 500px;
  background: radial-gradient(circle, rgba(255, 106, 0, 0.3) 0%, rgba(0,0,0,0) 70%);
  filter: blur(50px);
  pointer-events: none;
}

.cta-content { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.cta-title { font-size: clamp(1.75rem, 6vw, 3.5rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.15; margin-bottom: 16px; color: #FFFFFF; }
.cta-subtitle { font-size: clamp(0.9375rem, 2vw, 1.125rem); color: #A0A0A0; margin-bottom: 32px; }

/* =========================================
   13. SECTION 9: FOOTER
   ========================================= */
.footer {
  background-color: var(--bg-color);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 36px;
}

.footer-socials { display: flex; align-items: center; gap: 12px; }

.social-link {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.125rem;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.social-link:active {
  transform: scale(0.92);
}

@media (hover: hover) {
  .social-link:hover {
    background: var(--text-primary);
    color: #FFFFFF;
    border-color: var(--text-primary);
    transform: translateY(-3px);
  }
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

@media (max-width: 600px) {
  .footer-content, .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}