/* ==========================================================================
   STRIKE - Main Utilities & Layout (Main CSS File)
   ========================================================================== */

/* COURSE DETAIL MOCKUP STYLES
   ========================================================================== */

.course-detail {
  padding: var(--spacing-5xl) 0;
  background: var(--color-bg-secondary);
  min-height: 100vh;
  margin-top: 70px;
}

/* Remove list styles on ul, ol elements with a list role */
ul[role='list'],
ol[role='list'] {
  list-style: none;
}

/* Set core root defaults */
html:focus-within {
  scroll-behavior: smooth;
}

/* Set core body defaults */
body {
  min-height: 100vh;
  text-rendering: optimizeSpeed;
  line-height: 1.5;
}

/* A elements that don't have a class get default styles */
a:not([class]) {
  text-decoration-skip-ink: auto;
}

/* Make images easier to work with */
img,
picture {
  max-width: 100%;
  display: block;
}

/* Inherit fonts for inputs and buttons */
input,
button,
textarea,
select {
  font: inherit;
}

/* Remove all animations, transitions and smooth scroll for people that prefer not to see them */
@media (prefers-reduced-motion: reduce) {
  html:focus-within {
   scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* CUSTOM PROPERTIES (CSS Variables)
   ========================================================================== */

:root {
  /* Color Palette */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-secondary: #f59e0b;
  --color-accent: #10b981;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-success: #10b981;
  
  /* Background Colors */
  --color-bg-primary: #121212;
  --color-bg-secondary: #1a1a1a;
  --color-bg-tertiary: #2a2a2a;
  --color-bg-card: #1e1e1e;
  --color-bg-hover: #2d2d2d;
  
  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #e5e5e5;
  --color-text-muted: #a1a1a1;
  --color-text-disabled: #6b7280;
  --color-text-inverse: #121212;
  
  /* Border Colors */
  --color-border-primary: #374151;
  --color-border-secondary: #4b5563;
  --color-border-light: #6b7280;
  
  /* Typography */
  --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  
  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;
  
  /* Font Sizes */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */
  --font-size-6xl: 3.75rem;    /* 60px */
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Spacing */
  --spacing-xs: 0.25rem;    /* 4px */
  --spacing-sm: 0.5rem;     /* 8px */
  --spacing-md: 1rem;       /* 16px */
  --spacing-lg: 1.5rem;     /* 24px */
  --spacing-xl: 2rem;       /* 32px */
  --spacing-2xl: 3rem;      /* 48px */
  --spacing-3xl: 4rem;      /* 64px */
  --spacing-4xl: 5rem;      /* 80px */
  --spacing-5xl: 6rem;      /* 96px */
  
  /* Border Radius */
  --border-radius-sm: 0.125rem;   /* 2px */
  --border-radius-md: 0.375rem;   /* 6px */
  --border-radius-lg: 0.5rem;     /* 8px */
  --border-radius-xl: 0.75rem;    /* 12px */
  --border-radius-2xl: 1rem;      /* 16px */
  --border-radius-3xl: 1.5rem;    /* 24px */
  --border-radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index layers */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-toast: 1080;
  
  /* Container widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
}

/* GLOBAL BASE STYLES
   ========================================================================== */

/* Document and body setup */
html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-normal);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography base styles */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
}

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

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

h3 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

h4 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

h5 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

h6 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Links */
a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

a:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

/* Lists */
ul, ol {
  list-style: none;
  margin-bottom: var(--spacing-md);
}

/* Forms */
input, textarea, select {
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-md);
  color: var(--color-text-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-muted);
}

/* Buttons */
button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-fast);
}

button:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Tables */
table {
  border-collapse: collapse;
  width: 100%;
}

th, td {
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border-primary);
}

th {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

td {
  color: var(--color-text-secondary);
}

/* Code */
code, pre {
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  background-color: var(--color-bg-tertiary);
  border-radius: var(--border-radius-sm);
}

code {
  padding: 0.125rem 0.375rem;
  font-size: 0.875em;
}

pre {
  padding: var(--spacing-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

/* Selection */
::selection {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

::-moz-selection {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background-color: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-border-secondary);
  border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-border-light);
}

/* Focus management for accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* CONTAINER & LAYOUT UTILITIES
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-xl);
  }
}

/* Screen reader only */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* RESPONSIVE BREAKPOINTS
   ========================================================================== */

/* Mobile First Approach */
/* Extra small devices (phones, 576px and down) */
@media (max-width: 575.98px) {
  :root {
    --font-size-5xl: 2.5rem;   /* 40px */
    --font-size-4xl: 2rem;     /* 32px */
    --font-size-3xl: 1.75rem;  /* 28px */
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  .container {
    max-width: var(--container-sm);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .container {
    max-width: var(--container-lg);
  }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* XX Large devices (larger desktops, 1400px and up) */
@media (min-width: 1400px) {
  .container {
    max-width: var(--container-2xl);
  }
}

/* NAVIGATION STYLES
   ========================================================================== */

/* Header Container */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background-color: rgba(18, 18, 18, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-primary);
  transition: all var(--transition-normal);
}

/* Main content offset for fixed header */
.main-content {
  padding-top: 80px; /* Adjust based on header height */
}

@media (max-width: 768px) {
  .main-content {
    padding-top: 70px;
  }
}

/* Navigation Container */
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: var(--container-2xl);
  margin: 0 auto;
}

/* Logo/Brand */
.nav-brand {
  flex-shrink: 0;
}

.logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  color: var(--color-text-primary);
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.logo:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
}

/* Logo Image */
.logo-image {
  height: 40px;
  width: auto;
  transition: all var(--transition-fast);
  cursor: pointer;
  filter: brightness(1.1) contrast(1.1);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xs);
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.1), 
    rgba(129, 140, 248, 0.05));
  border: 1px solid rgba(99, 102, 241, 0.2);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.logo-image:hover {
  transform: scale(1.05) translateY(-1px);
  filter: brightness(1.3) contrast(1.3);
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.15), 
    rgba(129, 140, 248, 0.08));
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 
    0 4px 16px rgba(0, 0, 0, 0.15),
    0 0 20px rgba(99, 102, 241, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.logo-image:active {
  transform: scale(1.02) translateY(0);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* Logo container enhancements */
.nav-brand {
  flex-shrink: 0;
  position: relative;
}

.nav-brand::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, 
    var(--color-primary), 
    var(--color-primary-light), 
    var(--color-secondary));
  border-radius: var(--border-radius-xl);
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
  animation: rotateGlow 3s linear infinite;
}

.nav-brand:hover::before {
  opacity: 0.3;
}

@keyframes logoGlow {
  0%, 100% {
    opacity: 0.3;
  }
  50% {
    opacity: 0.6;
  }
}

/* Main Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin: 0 var(--spacing-xl);
}

.nav-link {
  position: relative;
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-link:hover {
  color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

/* Active link indicator */
.nav-link.active,
.nav-link:active {
  color: var(--color-primary-light);
  background-color: rgba(99, 102, 241, 0.1);
}

/* Animated underline effect */
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  transition: all var(--transition-fast);
  transform: translateX(-50%);
  border-radius: var(--border-radius-full);
}

.nav-link:hover::after {
  width: 80%;
}

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

/* Navigation Actions (Icons) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-lg);
  background-color: transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
}

.nav-icon:hover {
  background-color: var(--color-bg-hover);
  color: var(--color-text-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav-icon:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Search Icon */
.search-btn:hover {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-accent);
}

/* User Icon */
.user-btn:hover {
  background-color: rgba(99, 102, 241, 0.1);
  color: var(--color-primary-light);
}

/* Cart Icon with Badge */
.cart-btn {
  position: relative;
}

.cart-btn:hover {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--color-secondary);
}

.cart-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse);
  background-color: var(--color-danger);
  border-radius: var(--border-radius-full);
  animation: pulse 2s infinite;
}

/* Mobile Menu Toggle (Hamburger) */
.mobile-menu-checkbox {
  display: none;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: var(--z-modal);
}

.hamburger-line {
  width: 100%;
  height: 3px;
  background-color: var(--color-text-primary);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-normal);
  transform-origin: 1px;
}

.mobile-toggle:hover .hamburger-line {
  background-color: var(--color-primary-light);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
  .nav-container {
    padding: var(--spacing-md);
  }
  
  .logo {
    font-size: var(--font-size-xl);
  }
  
  .logo-image {
    height: 36px;
    padding: 6px;
    border-radius: var(--border-radius-md);
  }
  
  /* Hide desktop menu */
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border-primary);
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    padding: var(--spacing-4xl) var(--spacing-xl) var(--spacing-xl);
    margin: 0;
    gap: var(--spacing-lg);
    transition: right var(--transition-slow);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-2xl);
  }
  
  /* Mobile menu open state - using checkbox hack */
  .mobile-menu-checkbox:checked ~ .nav-menu {
    right: 0;
  }
  
  .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius-xl);
    text-align: center;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-primary);
  }
  
  .nav-link:hover {
    background-color: var(--color-bg-hover);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
  }
  
  /* Show mobile toggle */
  .mobile-toggle {
    display: flex;
  }
  
  /* Hide some nav actions on mobile */
  .nav-actions {
    gap: var(--spacing-xs);
  }
  
  .search-btn {
    display: none;
  }
  
  .nav-icon {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-base);
  }
}

/* Extra small screens */
@media (max-width: 480px) {
  .nav-container {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .nav-menu {
    width: 280px;
    padding: var(--spacing-3xl) var(--spacing-md) var(--spacing-md);
  }
  
  .logo {
    font-size: var(--font-size-lg);
  }
  
  .logo-image {
    height: 32px;
    padding: 4px;
    border-radius: var(--border-radius-sm);
  }
}

/* Mobile menu overlay */
.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  transition: opacity var(--transition-normal);
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-menu-checkbox:checked ~ .mobile-overlay {
    display: block;
    opacity: 1;
  }
}

/* Hamburger Animation */
.mobile-menu-checkbox:checked + .nav-menu + .nav-actions + .mobile-toggle .hamburger-line:nth-child(1) {
  transform: rotate(45deg);
  background-color: var(--color-primary-light);
}

.mobile-menu-checkbox:checked + .nav-menu + .nav-actions + .mobile-toggle .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: translateX(-20px);
}

.mobile-menu-checkbox:checked + .nav-menu + .nav-actions + .mobile-toggle .hamburger-line:nth-child(3) {
  transform: rotate(-45deg);
  background-color: var(--color-primary-light);
}

/* Scroll behavior - shrink header on scroll */
.header.scrolled {
  background-color: rgba(18, 18, 18, 0.98);
  box-shadow: var(--shadow-lg);
}

.header.scrolled .nav-container {
  padding: var(--spacing-sm) var(--spacing-lg);
}

.header.scrolled .logo {
  font-size: var(--font-size-xl);
}

/* Animations */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.1);
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Navigation link hover effects */
.nav-link {
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
  transition: left var(--transition-slow);
}

.nav-link:hover::before {
  left: 100%;
}

/* Focus states for accessibility */
.nav-link:focus,
.nav-icon:focus,
.mobile-toggle:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .header {
    background-color: var(--color-bg-primary);
    backdrop-filter: none;
  }
  
  .nav-link {
    border: 1px solid var(--color-border-secondary);
  }
  
  .nav-icon {
    border: 1px solid var(--color-border-primary);
  }
}

/* HERO SECTION STYLES
   ========================================================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(-45deg, #121212, #1a1a1a, #2a2a2a, #1e1e1e);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

/* Animated gradient background */
@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Hero container */
.hero-container {
  position: relative;
  z-index: 2;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  text-align: center;
}

/* Hero content */
.hero-content {
  max-width: 800px;
  margin: 0 auto;
  animation: fadeInUp 1s ease-out;
}

/* Hero title */
.hero-title {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-black);
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

/* Accent text styling */
.accent-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light), var(--color-secondary));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientText 3s ease infinite;
}

@keyframes gradientText {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

/* Hero subtitle */
.hero-subtitle {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero actions */
.hero-actions {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-3xl);
}

/* Button base styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--border-radius-xl);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  min-width: 180px;
  height: 56px;
}

/* Primary button (Explore Courses) */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-primary);
  box-shadow: var(--shadow-lg);
  border: 2px solid transparent;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
  z-index: 0;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: var(--color-text-primary);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-md);
}

/* Ensure text stays above the shimmer effect */
.btn-primary > * {
  position: relative;
  z-index: 1;
}

/* Secondary button (Watch Demo) */
.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid var(--color-primary);
  position: relative;
  z-index: 1;
}

.btn-secondary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  transition: width var(--transition-normal);
  z-index: -1;
}

.btn-secondary:hover {
  color: var(--color-text-primary);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary:hover::before {
  width: 100%;
}

.btn-secondary:active {
  transform: translateY(0);
}

/* Hero stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-2xl);
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-black);
  color: var(--color-primary-light);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero visual elements */
.hero-visual {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.floating-elements {
  position: relative;
  width: 100%;
  height: 100%;
}

.floating-shape {
  position: absolute;
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.1), 
    rgba(129, 140, 248, 0.05),
    rgba(245, 158, 11, 0.08)
  );
  animation: float 6s ease-in-out infinite;
}

.shape-1 {
  width: 200px;
  height: 200px;
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 150px;
  height: 150px;
  top: 60%;
  right: 15%;
  animation-delay: 2s;
}

.shape-3 {
  width: 100px;
  height: 100px;
  top: 40%;
  left: 80%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
    opacity: 0.3;
  }
  33% {
    transform: translateY(-20px) rotate(120deg);
    opacity: 0.6;
  }
  66% {
    transform: translateY(20px) rotate(240deg);
    opacity: 0.4;
  }
}

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

/* Pulse animation for primary button */
.btn-primary.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: var(--shadow-lg), 0 0 0 0 rgba(99, 102, 241, 0.4);
  }
  70% {
    box-shadow: var(--shadow-lg), 0 0 0 10px rgba(99, 102, 241, 0);
  }
  100% {
    box-shadow: var(--shadow-lg), 0 0 0 0 rgba(99, 102, 241, 0);
  }
}

/* Responsive hero styles */
@media (max-width: 768px) {
  .hero-container {
    padding: 0 var(--spacing-md);
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
  }
  
  .hero-actions {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .hero-stats {
    gap: var(--spacing-xl);
  }
  
  .stat-number {
    font-size: var(--font-size-2xl);
  }
  
  .floating-shape {
    opacity: 0.2;
  }
  
  .shape-1 {
    width: 120px;
    height: 120px;
  }
  
  .shape-2 {
    width: 80px;
    height: 80px;
  }
  
  .shape-3 {
    width: 60px;
    height: 60px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
  
  .hero-stats {
    gap: var(--spacing-lg);
  }
  
  .stat-number {
    font-size: var(--font-size-xl);
  }
  
  .stat-label {
    font-size: var(--font-size-xs);
  }
}

/* Button focus states for accessibility */
.btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .hero {
    animation: none;
  }
  
  .accent-text {
    animation: none;
    background: var(--color-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  
  .floating-shape {
    animation: none;
  }
  
  .hero-content {
    animation: none;
  }
  
  .btn-primary.pulse {
    animation: none;
  }
}

/* COURSE DISCOVERY SECTION STYLES
   ========================================================================== */

.courses {
  padding: var(--spacing-5xl) 0;
  background: linear-gradient(135deg, var(--color-bg-primary), var(--color-bg-secondary));
  position: relative;
}

/* Section Header */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
}

/* Filter Panel */
.filter-panel {
  margin-bottom: var(--spacing-3xl);
  position: relative;
}

.filter-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-xl);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-toggle:hover {
  background-color: var(--color-bg-hover);
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.filter-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: var(--z-dropdown);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-sm);
  min-width: 300px;
  box-shadow: var(--shadow-xl);
  animation: slideDown 0.3s ease-out;
}

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

.filter-group {
  margin-bottom: var(--spacing-lg);
}

.filter-group:last-child {
  margin-bottom: 0;
}

.filter-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.filter-chip input[type="checkbox"] {
  display: none;
}

.filter-chip span {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--border-radius-lg);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.filter-chip:hover span {
  background-color: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.filter-chip input[type="checkbox"]:checked + span {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
}

/* Course Grid */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-3xl);
}

/* Course Card */
.course-card {
  background-color: var(--color-bg-card);
  border-radius: var(--border-radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-border-primary);
  transition: all var(--transition-normal);
  position: relative;
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl), 0 0 30px rgba(99, 102, 241, 0.2);
  border-color: var(--color-primary);
}

/* Course Image */
.course-image {
  position: relative;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light), var(--color-secondary));
  background-size: 400% 400%;
  animation: gradientShift 8s ease infinite;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.course-image::before {
  content: '📚';
  font-size: 3rem;
  opacity: 0.3;
}

/* Course Badge */
.course-badge {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.course-badge.bestseller {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
}

.course-badge.new {
  background-color: var(--color-accent);
  color: var(--color-text-inverse);
}

/* Course Content */
.course-content {
  padding: var(--spacing-lg);
}

.course-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-snug);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-instructor {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  font-weight: var(--font-weight-medium);
}

/* Course Rating */
.course-rating {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.stars {
  display: flex;
  gap: 2px;
  font-size: var(--font-size-sm);
}

.rating-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}

/* Course Footer */
.course-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.course-price {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-light);
}

.btn-enroll {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-enroll:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-enroll:active {
  transform: translateY(0);
}

/* Mobile Navigation Styles for Index Page */
.nav-actions-mobile {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-actions-mobile .btn-outline,
.nav-actions-mobile .btn-primary {
  width: 100%;
  text-align: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
}

.nav-actions-mobile .btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.nav-actions-mobile .btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-primary-light);
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.nav-actions-mobile .btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-primary);
  border: 2px solid var(--color-primary);
}

.nav-actions-mobile .btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Desktop Navigation Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-actions .btn-outline,
.nav-actions .btn-primary {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-actions .btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-primary-light);
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.nav-actions .btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-primary);
  border: 2px solid var(--color-primary);
}

.nav-actions .btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
  .nav-actions {
    display: none;
  }
  
  .nav-actions-mobile {
    display: flex;
  }
}

@media (min-width: 769px) {
  .nav-actions-mobile {
    display: none;
  }
}
  .courses {
    padding: var(--spacing-4xl) 0;
  }
  
  .section-title {
    font-size: var(--font-size-3xl);
  }
  
  .section-subtitle {
    font-size: var(--font-size-base);
  }
  
  .course-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .filter-content {
    position: static;
    display: block;
    margin-top: var(--spacing-lg);
    min-width: auto;
    width: 100%;
  }
  
  .filter-toggle {
    width: 100%;
    justify-content: center;
  }


@media (max-width: 480px) {
  .section-header {
    margin-bottom: var(--spacing-2xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
  
  .course-content {
    padding: var(--spacing-md);
  }
  
  .course-image {
    height: 160px;
  }
  
  .course-footer {
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: stretch;
  }
  
  .btn-enroll {
    width: 100%;
    text-align: center;
  }
}

/* Loading state animation */
.course-card.loading {
  opacity: 0;
  animation: fadeInCard 0.6s ease-out forwards;
}

@keyframes fadeInCard {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered animation for cards */
.course-card:nth-child(1) { animation-delay: 0.1s; }
.course-card:nth-child(2) { animation-delay: 0.2s; }
.course-card:nth-child(3) { animation-delay: 0.3s; }
.course-card:nth-child(4) { animation-delay: 0.4s; }
.course-card:nth-child(5) { animation-delay: 0.5s; }
.course-card:nth-child(6) { animation-delay: 0.6s; }

/* Hover effect for course images */
.course-card:hover .course-image {
  animation-play-state: paused;
}

.course-card:hover .course-image::before {
  transform: scale(1.2);
  opacity: 0.5;
  transition: all var(--transition-normal);
}

/* FEATURED COURSES CAROUSEL STYLES
   ========================================================================== */

.featured {
  padding: var(--spacing-5xl) 0;
  background: linear-gradient(45deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  position: relative;
  overflow: hidden;
}

/* Background decoration */
.featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(245, 158, 11, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.featured .container {
  position: relative;
  z-index: 2;
}

/* Featured section header */
.featured .section-header {
  margin-bottom: var(--spacing-3xl);
}

.featured .section-title {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Carousel container */
.featured-carousel {
  position: relative;
  margin: 0 -var(--spacing-md);
  padding: 0 var(--spacing-md);
}

.carousel-container {
  display: flex;
  gap: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--color-primary) transparent;
}

/* Show scrollbar on desktop for better UX */
.carousel-container::-webkit-scrollbar {
  height: 8px;
  display: block;
}

.carousel-container::-webkit-scrollbar-track {
  background: var(--color-bg-tertiary);
  border-radius: var(--border-radius-full);
}

.carousel-container::-webkit-scrollbar-thumb {
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--border-radius-full);
}

.carousel-container::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-secondary));
}

/* Featured course card */
.featured-card {
  flex: 0 0 380px;
  background: var(--color-bg-card);
  border-radius: var(--border-radius-3xl);
  overflow: hidden;
  border: 1px solid var(--color-border-primary);
  scroll-snap-align: start;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: 
    var(--shadow-lg),
    0 0 0 1px rgba(99, 102, 241, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transform-style: preserve-3d;
  opacity: 0;
  animation: slideInFromRight 0.8s ease-out forwards;
}

/* Staggered animations */
.featured-card:nth-child(1) { animation-delay: 0.2s; }
.featured-card:nth-child(2) { animation-delay: 0.4s; }
.featured-card:nth-child(3) { animation-delay: 0.6s; }

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(60px) rotateY(15deg);
  }
  to {
    opacity: 1;
    transform: translateX(0) rotateY(0);
  }
}

/* Featured card hover effects */
.featured-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.15),
    0 0 30px rgba(99, 102, 241, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary-light);
}

/* Featured card link wrapper */
.featured-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
  height: 100%;
  width: 100%;
  cursor: pointer;
}

.featured-card-link:hover {
  text-decoration: none;
  color: inherit;
}

/* Enhanced glow effect */
.featured-card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  bottom: -1px;
  background: linear-gradient(135deg, 
    var(--color-primary), 
    var(--color-primary-light), 
    var(--color-secondary));
  border-radius: var(--border-radius-3xl);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.featured-card:hover::before {
  opacity: 0.6;
}

/* Featured image */
.featured-image {
  height: 220px;
  background: linear-gradient(135deg, 
    var(--color-primary), 
    var(--color-primary-light), 
    var(--color-secondary));
  background-size: 400% 400%;
  animation: gradientShift 12s ease infinite;
  position: relative;
  overflow: hidden;
}

.featured-image::before {
  content: '🎓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  opacity: 0.4;
  transition: all var(--transition-normal);
}

.featured-card:hover .featured-image::before {
  transform: translate(-50%, -50%) scale(1.1);
  opacity: 0.7;
}

/* Subtle shine effect on image */
.featured-image::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.1), 
    transparent);
  transition: left var(--transition-slow);
}

.featured-card:hover .featured-image::after {
  left: 100%;
}

/* Featured content */
.featured-content {
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, 
    var(--color-bg-card), 
    rgba(99, 102, 241, 0.02));
}

.featured-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-snug);
}

.featured-description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Featured meta information */
.featured-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.duration, .students {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: var(--font-weight-medium);
}

.duration::before {
  content: '⏱️';
}

.students::before {
  content: '👥';
}

/* Featured price */
.featured-price {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  color: var(--color-primary-light);
  text-align: center;
  padding: var(--spacing-md);
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.1), 
    rgba(129, 140, 248, 0.05));
  border-radius: var(--border-radius-xl);
  border: 1px solid rgba(99, 102, 241, 0.2);
  position: relative;
  transition: all var(--transition-normal);
}

/* Featured action button */
.featured-action {
  margin-top: var(--spacing-md);
  display: flex;
  justify-content: center;
}

.featured-enroll {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #ffffff;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  display: inline-block;
  text-align: center;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.featured-enroll:hover {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
  color: #ffffff;
  text-decoration: none;
}

.featured-card:hover .featured-price {
  background: linear-gradient(135deg, 
    rgba(99, 102, 241, 0.15), 
    rgba(129, 140, 248, 0.08));
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

/* Responsive design */
@media (max-width: 1024px) {
  .featured-card {
    flex: 0 0 340px;
  }
  
  .featured-content {
    padding: var(--spacing-lg);
  }
  
  .carousel-container {
    padding: var(--spacing-md) 0;
  }
}

@media (max-width: 768px) {
  .featured {
    padding: var(--spacing-4xl) 0;
  }
  
  .featured-carousel {
    margin: 0 -var(--spacing-sm);
    padding: 0 var(--spacing-sm);
  }
  
  .carousel-container {
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-lg);
    /* Hide scrollbar on mobile for cleaner look */
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  
  .carousel-container::-webkit-scrollbar {
    display: none;
  }
  
  .featured-card {
    flex: 0 0 300px;
  }
  
  .featured-image {
    height: 180px;
  }
  
  .featured-content {
    padding: var(--spacing-md);
  }
  
  .featured-title {
    font-size: var(--font-size-lg);
  }
  
  .featured-description {
    font-size: var(--font-size-sm);
  }
  
  .featured-price {
    font-size: var(--font-size-xl);
  }
}

@media (max-width: 480px) {
  .featured-card {
    flex: 0 0 280px;
  }
  
  .featured-image {
    height: 160px;
  }
  
  .featured-meta {
    flex-direction: column;
    gap: var(--spacing-xs);
    align-items: flex-start;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .featured-card {
    animation: none;
    opacity: 1;
  }
  
  .featured-card::before {
    animation: none;
  }
  
  .featured-image {
    animation: none;
  }
  
  .carousel-container {
    scroll-behavior: auto;
  }
  
  .featured-card:hover {
    transform: none;
  }
}

/* High performance optimizations */
.featured-card {
  will-change: transform, box-shadow;
  backface-visibility: hidden;
  perspective: 1000px;
}

.featured-image {
  will-change: transform;
  backface-visibility: hidden;
}