/* ==========================================================================
   Design System & Custom Properties (Theme Variables)
   ========================================================================== */

:root {
  /* Typography */
  --font-primary: 'Cairo', system-ui, -apple-system, sans-serif;
  
  /* Layout */
  --header-height: 80px;
  --container-width: 1200px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Theme-specific (Light Theme Default) */
  --primary-red: #c02a2a;
  --primary-red-hover: #9e1f1f;
  --primary-red-glow: rgba(192, 42, 42, 0.12);
  --dark-charcoal: #1a1a1a;
  --dark-charcoal-light: #2d2d2d;
  
  --text-main: #2d3748;
  --text-muted: #718096;
  
  --bg-base: #f8f9fa;
  --bg-surface: #ffffff;
  --bg-surface-2: #f3f4f6;
  --border-color: #e2e8f0;
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-shadow: rgba(0, 0, 0, 0.04);
  
  /* Additional colors */
  --accent-green: #10b981;
  --accent-green-glow: rgba(16, 185, 129, 0.12);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 10px 30px rgba(192, 42, 42, 0.25);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

/* Dark Theme Variables */
body.dark-theme {
  --primary-red: #e03b3b;
  --primary-red-hover: #ff5555;
  --primary-red-glow: rgba(224, 59, 59, 0.25);
  --dark-charcoal: #ffffff;
  --dark-charcoal-light: #f3f4f6;
  
  --text-main: #e2e8f0;
  --text-muted: #a0aec0;
  
  --bg-base: #0f0f11;
  --bg-surface: #17171a;
  --bg-surface-2: #1e1e24;
  --border-color: #27272a;
  
  /* Glassmorphism */
  --glass-bg: rgba(23, 23, 26, 0.8);
  --glass-border: rgba(255, 255, 255, 0.05);
  --glass-shadow: rgba(0, 0, 0, 0.35);
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ==========================================================================
   CSS Resets & Base Styles
   ========================================================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

ul {
  list-style: none;
}

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

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Selection */
::selection {
  background-color: var(--primary-red);
  color: #ffffff;
}

/* ==========================================================================
   Layout & Utility Classes
   ========================================================================== */

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

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }
.text-primary { color: var(--primary-red); }
.text-success { color: var(--accent-green); }
.text-muted { color: var(--text-muted); }
.hidden { display: none !important; }

/* Grid Utilities */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* Dynamic Glow / Gradient Text */
.text-gradient {
  background: linear-gradient(135deg, var(--primary-red) 30%, var(--dark-charcoal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

body.dark-theme .text-gradient {
  background: linear-gradient(135deg, var(--primary-red) 30%, #f3f4f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==========================================================================
   Button System
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary-red);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--primary-red-glow);
}

.btn-primary:hover {
  background-color: var(--primary-red-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  border-color: var(--primary-red);
  color: var(--primary-red);
  transform: translateY(-2px);
}

.btn-outline-light {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  color: #ffffff;
}

.btn-outline-light:hover {
  background-color: #ffffff;
  color: var(--dark-charcoal);
  border-color: #ffffff;
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* Pulse Animation for CTA */
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(192, 42, 42, 0.4); }
  70% { box-shadow: 0 0 0 15px rgba(192, 42, 42, 0); }
  100% { box-shadow: 0 0 0 0 rgba(192, 42, 42, 0); }
}

body.dark-theme @keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(224, 59, 59, 0.4); }
  70% { box-shadow: 0 0 0 15px rgba(224, 59, 59, 0); }
  100% { box-shadow: 0 0 0 0 rgba(224, 59, 59, 0); }
}

.pulse-animation {
  animation: pulse 2s infinite;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  transition: all var(--transition-normal);
}

/* Scrolled Header State */
.site-header.scrolled {
  height: 70px;
  box-shadow: var(--glass-shadow);
}

.header-container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-wrapper {
  display: flex;
  align-items: center;
  height: 100%;
}

.header-logo {
  height: 65px;
  width: auto;
  transition: all var(--transition-normal);
}

.site-header.scrolled .header-logo {
  height: 55px;
}

.logo-wrapper:hover .header-logo {
  transform: scale(1.02);
}

/* Dynamic SVG theme colors */
.svg-red-dot {
  fill: #c02a2a;
}
.svg-dark-shape {
  fill: var(--dark-charcoal-light);
  transition: fill var(--transition-normal);
}
.svg-text-title {
  fill: var(--dark-charcoal-light);
  transition: fill var(--transition-normal);
}
.svg-text-subtitle {
  fill: #c02a2a;
}

.nav-menu {
  display: block;
}

.nav-list {
  display: flex;
  gap: 28px;
}

.nav-link {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  padding: 8px 4px;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-red);
  transition: width var(--transition-normal);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary-red);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* Theme Toggle Button */
.theme-toggle {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.theme-toggle:hover {
  background-color: var(--primary-red);
  color: #ffffff;
  border-color: var(--primary-red);
  transform: rotate(30deg);
}

/* Toggle icon shift */
body.dark-theme .theme-toggle i::before {
  content: "\f185"; /* sun icon code in fontawesome */
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 5px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

/* Animated Floating Background Shapes */
.hero-bg-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero-bg-shapes .shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  transition: background-color var(--transition-normal);
}

.hero-bg-shapes .shape-1 {
  background-color: var(--primary-red);
  width: 400px;
  height: 400px;
  top: -100px;
  left: -100px;
  animation: float-shape 15s infinite alternate;
}

.hero-bg-shapes .shape-2 {
  background-color: var(--primary-red);
  width: 350px;
  height: 350px;
  bottom: -50px;
  right: -50px;
  animation: float-shape-reverse 20s infinite alternate;
}

@keyframes float-shape {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(60px, 80px) scale(1.1); }
}

@keyframes float-shape-reverse {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-80px, -60px) scale(1.15); }
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 50px;
  position: relative;
  z-index: 1;
}

.badge-promo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary-red-glow);
  color: var(--primary-red);
  padding: 8px 16px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--dark-charcoal);
  margin-bottom: 24px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 15px;
  margin-bottom: 50px;
}

/* Stats Counter Row */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 30px 48px;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
}

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

.stat-icon {
  font-size: 1.5rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: color var(--transition-normal), transform var(--transition-normal);
}

.stat-item:hover .stat-icon {
  color: var(--primary-red);
  transform: translateY(-2px);
}

.stat-number {
  font-family: var(--font-primary);
  font-variant-numeric: lining-nums;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-red);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Hero Visual Part */
.hero-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.visual-card-wrapper {
  position: relative;
  width: 100%;
  max-width: 400px;
  height: 400px;
}

/* Glassmorphic card design */
.glass-card {
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--shadow-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg), 0 10px 30px rgba(0,0,0,0.1);
}

.main-visual-card {
  width: 100%;
  height: 100%;
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  z-index: 2;
}

.card-glow {
  position: absolute;
  width: 150px;
  height: 150px;
  background-color: var(--primary-red);
  filter: blur(50px);
  opacity: 0.15;
  top: -50px;
  right: -50px;
}

.card-header-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--primary-red-glow);
  color: var(--primary-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin: 0 auto 30px;
}

.main-visual-card h3 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 15px;
  color: var(--dark-charcoal);
}

.main-visual-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 30px;
}

.card-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.card-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--border-color);
}

.card-dots span:first-child {
  background-color: var(--primary-red);
}

/* Floating supporting cards */
.floating-card {
  position: absolute;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 15px;
  z-index: 3;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.floating-card i {
  font-size: 1.8rem;
}

.floating-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark-charcoal);
}

.floating-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.card-top-right {
  top: 20px;
  right: -40px;
  animation: float-y 4s ease-in-out infinite alternate;
}

.card-bottom-left {
  bottom: 20px;
  left: -40px;
  animation: float-y 4s ease-in-out infinite alternate-reverse 1s;
}

@keyframes float-y {
  0% { transform: translateY(0); }
  100% { transform: translateY(-15px); }
}

/* ==========================================================================
   Section Headers (Global)
   ========================================================================== */

section {
  padding: 100px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

section:nth-of-type(even) {
  background-color: var(--bg-base);
}

.section-header {
  margin-bottom: 60px;
  max-width: 700px;
}

.section-header.text-center {
  margin-left: auto;
  margin-right: auto;
}

.section-header.text-between {
  max-width: none;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 30px;
}

.section-tag {
  display: inline-block;
  color: var(--primary-red);
  font-weight: 800;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  background-color: var(--primary-red-glow);
  padding: 4px 12px;
  border-radius: 20px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--dark-charcoal);
  line-height: 1.3;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-top: 15px;
}

/* ==========================================================================
   About Section
   ========================================================================== */

.about-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 60px;
  align-items: center;
}

.image-stack {
  position: relative;
  display: flex;
  justify-content: center;
}

.about-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 380px;
  height: 380px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  transition: transform var(--transition-normal);
}

.about-image-wrapper:hover {
  transform: scale(1.02);
}

.about-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-img-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(192, 42, 42, 0.45) 0%, rgba(26, 26, 26, 0.6) 100%);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.experience-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--shadow-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--primary-red);
  padding: 10px 20px;
  border-radius: 30px;
  z-index: 5;
  font-weight: 700;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.experience-badge:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.experience-badge i {
  font-size: 1.1rem;
}

.about-content h2 {
  margin-bottom: 20px;
}

.about-text {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 20px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 35px;
}

.about-feature-item {
  display: flex;
  gap: 20px;
}

.about-feature-item .feature-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background-color: var(--primary-red-glow);
  color: var(--primary-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.about-feature-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-charcoal);
  margin-bottom: 6px;
}

.about-feature-item p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   Courses Section (With Filter & Search)
   ========================================================================== */

.courses-control {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 30px;
  margin-bottom: 50px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.search-box {
  position: relative;
  flex: 1;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
}

.search-box input {
  width: 100%;
  padding: 12px 48px 12px 20px;
  border-radius: 30px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.search-box input:focus {
  border-color: var(--primary-red);
  background-color: var(--bg-surface);
  box-shadow: 0 0 0 4px var(--primary-red-glow);
}

.search-clear-btn {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: none;
  font-size: 1rem;
  padding: 4px;
}

.search-clear-btn:hover {
  color: var(--primary-red);
}

.filter-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-btn {
  background-color: var(--bg-base);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 20px;
  border-radius: 20px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--primary-red);
  color: var(--primary-red);
}

.filter-btn.active {
  background-color: var(--primary-red);
  color: #ffffff;
  border-color: var(--primary-red);
  box-shadow: 0 4px 10px var(--primary-red-glow);
}

/* Courses Grid & Cards */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  transition: opacity var(--transition-normal);
}

.course-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-red-glow);
}

/* Card Decorative Image */
.course-card-img-placeholder {
  height: 180px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-red-glow) 0%, rgba(26, 26, 26, 0.05) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-card-img-placeholder::after {
  content: '\f518'; /* graduation cap icon */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 4.5rem;
  color: var(--primary-red);
  opacity: 0.2;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.course-card:hover .course-card-img-placeholder::after {
  transform: scale(1.1) rotate(-10deg);
  opacity: 0.35;
}

/* Give each card a customized colorful decorative gradient */
.course-card[data-category="management"] .course-card-img-placeholder {
  background: linear-gradient(135deg, rgba(192, 42, 42, 0.15) 0%, rgba(245, 158, 11, 0.15) 100%);
}
.course-card[data-category="ai"] .course-card-img-placeholder {
  background: linear-gradient(135deg, rgba(192, 42, 42, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
}
.course-card[data-category="design"] .course-card-img-placeholder {
  background: linear-gradient(135deg, rgba(192, 42, 42, 0.15) 0%, rgba(59, 130, 246, 0.15) 100%);
}
.course-card[data-category="data-science"] .course-card-img-placeholder {
  background: linear-gradient(135deg, rgba(192, 42, 42, 0.15) 0%, rgba(13, 148, 136, 0.15) 100%);
}

.course-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.course-tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 800;
  background-color: var(--bg-surface-2);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.course-card[data-category="management"] .course-tag {
  background-color: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.course-card[data-category="ai"] .course-tag {
  background-color: rgba(168, 85, 247, 0.1);
  color: #a855f7;
}

.course-card[data-category="design"] .course-tag {
  background-color: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.course-card[data-category="data-science"] .course-tag {
  background-color: rgba(13, 148, 136, 0.1);
  color: #0d9488;
}

.course-card-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--dark-charcoal);
  margin-bottom: 10px;
  line-height: 1.4;
}

.course-card-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex: 1;
}

.course-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 15px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.course-info span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.course-info span i {
  color: var(--primary-red);
}

/* No Results style */
.no-results {
  text-align: center;
  padding: 60px 20px;
}

.no-results i {
  font-size: 4rem;
  color: var(--border-color);
  margin-bottom: 20px;
}

.no-results h3 {
  font-size: 1.4rem;
  color: var(--dark-charcoal);
  margin-bottom: 8px;
}

/* ==========================================================================
   Why Choose Us Section
   ========================================================================== */

.why-us-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.why-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-red);
  box-shadow: var(--shadow-md);
}

.why-icon {
  width: 65px;
  height: 65px;
  border-radius: 50%;
  background-color: var(--primary-red-glow);
  color: var(--primary-red);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 20px;
  transition: all var(--transition-normal);
}

.why-card:hover .why-icon {
  transform: scale(1.1) rotate(10deg);
  background-color: var(--primary-red);
  color: #ffffff;
}

.why-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark-charcoal);
  margin-bottom: 12px;
}

.why-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Articles Section
   ========================================================================== */

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

.article-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.article-card-img-placeholder {
  height: 180px;
  background: linear-gradient(135deg, var(--border-color) 0%, var(--bg-surface-2) 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.article-card-img-placeholder::after {
  content: '\f15c'; /* file-text icon */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 3.5rem;
  color: var(--text-muted);
  opacity: 0.25;
}

.article-card-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.article-card-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark-charcoal);
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex: 1;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--primary-red);
}

.article-link i {
  transition: transform var(--transition-fast);
}

.article-card:hover .article-link i {
  transform: translateX(-5px);
}

/* ==========================================================================
   Call To Action (CTA) Section
   ========================================================================== */

.cta-banner-section {
  padding: 80px 0;
  background-color: var(--bg-surface);
  border-bottom: none;
}

.cta-banner-wrapper {
  background: linear-gradient(135deg, #1f1f1f 0%, #301010 60%, var(--primary-red) 100%);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 20px 50px rgba(192, 42, 42, 0.2);
}

body.dark-theme .cta-banner-wrapper {
  background: linear-gradient(135deg, #09090b 0%, #200505 60%, var(--primary-red) 100%);
  border: 1px solid var(--border-color);
}

.cta-glow-1, .cta-glow-2 {
  position: absolute;
  width: 250px;
  height: 250px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
}

.cta-glow-1 {
  background-color: var(--primary-red);
  top: -100px;
  left: -100px;
}

.cta-glow-2 {
  background-color: #ffffff;
  bottom: -100px;
  right: -100px;
}

.cta-content {
  position: relative;
  z-index: 5;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.8rem;
  font-weight: 900;
  color: #ffffff;
  margin-bottom: 20px;
}

.cta-content p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 40px;
  line-height: 1.6;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* ==========================================================================
   FAQ Section (Accordion)
   ========================================================================== */

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--dark-charcoal);
  cursor: pointer;
  text-align: right;
  transition: color var(--transition-fast);
}

.faq-question i {
  color: var(--text-muted);
  transition: transform var(--transition-normal);
}

.faq-question:hover {
  color: var(--primary-red);
}

.faq-item.active {
  border-color: var(--primary-red-glow);
  box-shadow: var(--shadow-md);
}

.faq-item.active .faq-question {
  color: var(--primary-red);
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary-red);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal) ease-out;
}

.faq-answer p {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ==========================================================================
   Footer Section
   ========================================================================== */

.site-footer {
  background-color: #111115;
  color: #ffffff;
  padding-top: 80px;
  font-size: 0.9rem;
  border-top: 1px solid #1a1a24;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr 1.1fr;
  gap: 40px;
  padding-bottom: 60px;
}

.footer-logo-container {
  margin-bottom: 20px;
}

.footer-logo {
  height: 55px;
  width: auto;
}

.footer-desc {
  color: #a0aec0;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 320px;
}

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

.social-links a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background-color: #1e1e24;
  border: 1px solid #2d2d3a;
  color: #a0aec0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: all var(--transition-normal);
}

.social-links a:hover {
  background-color: var(--primary-red);
  color: #ffffff;
  border-color: var(--primary-red);
  transform: translateY(-3px);
}

.footer-links h3, .footer-contact h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 10px;
}

.footer-links h3::after, .footer-contact h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 35px;
  height: 2px;
  background-color: var(--primary-red);
}

.footer-links ul, .footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-links ul a {
  color: #a0aec0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.footer-links ul a i {
  font-size: 0.7rem;
  transition: transform var(--transition-fast);
}

.footer-links ul a:hover {
  color: #ffffff;
}

.footer-links ul a:hover i {
  transform: translateX(-4px);
  color: var(--primary-red);
}

.footer-contact ul li {
  display: flex;
  gap: 12px;
  color: #a0aec0;
  line-height: 1.5;
}

.footer-contact ul li i {
  color: var(--primary-red);
  font-size: 1rem;
  margin-top: 3px;
}

.footer-bottom {
  border-top: 1px solid #1e1e24;
  padding: 24px 0;
  color: #718096;
  font-size: 0.85rem;
}

/* ==========================================================================
   Scroll Animation (Scroll Reveal Effects)
   ========================================================================== */

.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.scroll-reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */

/* Large Tablets & Desktop under container size */
@media (max-width: 1200px) {
  :root {
    --container-width: 960px;
  }
  
  .hero-title {
    font-size: 2.6rem;
  }
  
  .why-us-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Medium Tablets (Landscape & Portrait) */
@media (max-width: 1024px) {
  :root {
    --container-width: 720px;
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-visual {
    margin-top: 20px;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .about-content {
    text-align: center;
  }
  
  .about-feature-item {
    text-align: right;
  }
  
  .about-features {
    align-items: center;
  }
  
  .courses-control {
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
  }
  
  .search-box {
    max-width: none;
  }
  
  .filter-buttons {
    justify-content: center;
  }
  
  .courses-grid, .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

/* Mobile Devices */
@media (max-width: 768px) {
  :root {
    --container-width: 100%;
    --header-height: 70px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
  }
  
  /* Navigation Menu overlay for mobile */
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--bg-surface);
    z-index: 999;
    padding: 40px 24px;
    transition: left var(--transition-normal);
    box-shadow: -10px 10px 20px rgba(0,0,0,0.05);
    border-top: 1px solid var(--border-color);
  }
  
  .nav-menu.open {
    left: 0;
  }
  
  .nav-list {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
  
  .nav-link {
    font-size: 1.15rem;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .header-actions .nav-cta-btn {
    display: none; /* Hide top header register button on small mobile to save space */
  }
  
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
  
  .visual-card-wrapper {
    height: 320px;
  }
  
  .main-visual-card {
    padding: 24px;
  }
  
  .floating-card {
    padding: 10px 15px;
  }
  
  .card-top-right {
    right: -10px;
  }
  
  .card-bottom-left {
    left: -10px;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-header.text-between {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
  }
  
  .courses-grid, .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .why-us-grid {
    grid-template-columns: 1fr;
  }
  
  .cta-banner-wrapper {
    padding: 40px 20px;
  }
  
  .cta-content h2 {
    font-size: 2rem;
  }
  
  .cta-content p {
    font-size: 1rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-desc {
    max-width: none;
  }
}