/* Base Styles & Variables */
:root {
  /* Colors */
  --primary-color: #4895ef;
  --primary-dark: #3a86e0;
  --secondary-color: #7209b7;
  --accent-color: #4cc9f0;
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --danger-color: #f44336;
  --background-color: #121212;
  --card-background: #1e1e1e;
  --text-color: #f8f9fa;
  --text-secondary: #adb5bd;
  --border-color: #495057;
  --sidebar-bg: #1e1e1e;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 10px 20px rgba(0, 0, 0, 0.4);
  --transition: all 0.3s ease;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  
  /* Typography */
  --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;
  --font-size-xxxl: 2rem;
  
  /* Breakpoints */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: var(--font-size-xxxl);
}

h2 {
  font-size: var(--font-size-xxl);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

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

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

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

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: var(--font-size-base);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  text-decoration: none;
}

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

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  text-decoration: none;
}

/* Icon Buttons */
.btn-icon {
  background-color: var(--card-background);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
  font-size: 1.2rem;
}

.btn-icon:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Header */
.main-header {
  background-color: var(--card-background);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
}

.header-controls {
  display: flex;
  gap: var(--spacing-sm);
}

/* Navigation */
.main-navigation {
  background-color: var(--card-background);
  box-shadow: var(--shadow);
  position: sticky;
  top: 60px;
  z-index: 999;
}

.nav-menu {
  display: flex;
  list-style: none;
  flex-wrap: wrap;
  padding: var(--spacing-sm) 0;
  gap: var(--spacing-sm);
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  font-size: 1.5rem;
  align-items: center;
  justify-content: center;
}

/* Hamburger Animation */
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
}

.hamburger span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--text-color);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active .hamburger span:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

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

.mobile-menu-toggle.active .hamburger span:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Mobile Menu */
@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    display: none;
    flex-direction: column;
    background-color: var(--card-background);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow);
    border-radius: var(--radius-md);
    z-index: 1000;
    max-height: 70vh;
    overflow-y: auto;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu li {
    width: 100%;
    margin-bottom: var(--spacing-xs);
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
  }
  
  .nav-menu li:last-child {
    margin-bottom: 0;
  }
}

/* Hero Section */
.hero-section {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(114, 9, 183, 0.1));
  border-radius: var(--radius-lg);
  margin: var(--spacing-lg) 0;
}

.hero-content {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.hero-content h1 {
  font-size: var(--font-size-xxxl);
  margin-bottom: var(--spacing-md);
}

.hero-content p {
  font-size: var(--font-size-lg);
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Slider */
.slider-container {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.slider {
  display: flex;
  transition: transform 0.5s ease;
}

.slide {
  min-width: 100%;
  display: none;
}

.slide.active {
  display: block;
}

.slide img {
  width: 100%;
  height: auto;
  display: block;
}

.slider-nav {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.prev-btn,
.next-btn {
  background-color: var(--card-background);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.prev-btn:hover,
.next-btn:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.dot.active,
.dot:hover {
  background-color: var(--primary-color);
}

/* Content Sections */
.content-section {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--border-color);
}

.content-section:last-child {
  border-bottom: none;
}

.feature-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.feature-card {
  background-color: var(--card-background);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  font-size: var(--font-size-xxl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.feature-item {
  background-color: var(--card-background);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.feature-item h3 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

/* Video Grid Container */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

/* Video Container */
.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Installation Steps */
.installation-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.step {
  display: flex;
  gap: var(--spacing-md);
}

.step-number {
  background-color: var(--primary-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  margin-top: 0;
}

.activation-info {
  background-color: rgba(76, 201, 240, 0.1);
  border-left: 4px solid var(--accent-color);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-top: var(--spacing-sm);
}

.activation-key {
  font-family: monospace;
  font-weight: bold;
  color: var(--accent-color);
}

/* Settings Tabs */
.settings-tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.tab {
  background-color: var(--card-background);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.tab h3 {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--primary-color);
}

.tab ul {
  padding-left: var(--spacing-lg);
}

.tab li {
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
}

/* FAQ - Completely Redesigned */
.faq-container {
  margin: var(--spacing-lg) 0;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.faq-section {
  margin-bottom: var(--spacing-xl);
}

.faq-section h2 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--primary-color);
}

.faq-section h2::after {
  left: 50%;
  transform: translateX(-50%);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.faq-card {
  background: var(--card-background);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

.faq-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--primary-color);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.faq-card:hover::before {
  transform: scaleX(1);
}

.faq-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.faq-card h3 i {
  color: var(--primary-color);
}

.faq-card .faq-answer {
  padding: var(--spacing-sm) 0 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  border-top: none;
  background: transparent;
}

.faq-card.active .faq-answer {
  max-height: 500px;
  padding-top: var(--spacing-sm);
}

.faq-card .faq-toggle {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: rgba(72, 149, 239, 0.1);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.faq-card:hover .faq-toggle {
  background: var(--primary-color);
  color: white;
}

.faq-card.active .faq-toggle {
  transform: rotate(45deg);
  background: var(--success-color);
}

/* Enhanced Activation Key Styles */
.activation-key-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-sm) 0;
  flex-wrap: wrap;
}

.activation-key {
  font-family: monospace;
  font-weight: bold;
  color: var(--accent-color);
  background-color: rgba(76, 201, 240, 0.15);
  border: 1px solid var(--accent-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-lg);
  letter-spacing: 1px;
  display: inline-block;
  transition: var(--transition);
}

.activation-key:hover {
  background-color: rgba(76, 201, 240, 0.25);
  transform: scale(1.02);
}

.copy-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
  transition: var(--transition);
  height: fit-content;
}

.copy-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
}

.copy-btn.copied {
  background-color: var(--success-color);
}

.copy-btn.copied i::before {
  content: '\f00c';
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
}

/* Footer */
.main-footer {
  background-color: var(--card-background);
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--primary-color);
  text-decoration: none;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.footer-bottom a {
  color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 992px) {
  .hero-content h1 {
    font-size: var(--font-size-xxl);
  }
  
  .hero-content p {
    font-size: var(--font-size-base);
  }
  
  .features-grid,
  .settings-tabs {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    display: none;
    flex-direction: column;
    background-color: var(--card-background);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow);
    border-radius: var(--radius-md);
    z-index: 1000;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu li {
    width: 100%;
  }
  
  .nav-link {
    display: block;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .installation-steps {
    grid-template-columns: 1fr;
  }
  
  .step {
    flex-direction: column;
  }
  
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: var(--font-size-xxl);
  }
  
  h2 {
    font-size: var(--font-size-xl);
  }
  
  .activation-key-container {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .activation-key {
    font-size: var(--font-size-base);
    width: 100%;
    text-align: center;
  }
  
  .copy-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .container {
    width: 95%;
  }
  
  .header-content {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
  
  .hero-content {
    padding: 0 var(--spacing-sm);
  }
  
  .feature-highlights {
    grid-template-columns: 1fr;
  }
  
  .slider-nav {
    gap: var(--spacing-md);
  }
  
  .prev-btn,
  .next-btn {
    width: 40px;
    height: 40px;
  }
}