/* ========================================
   AdPulse - Premium Support Page Styles
   Design System: Dark Mode with Neon Accent
   ======================================== */

/* CSS Variables - Design Tokens */
:root {
  /* Colors - Based on app theme */
  --color-bg-deep: #080B13;
  --color-bg-surface: #121826;
  --color-bg-surface-highlight: #1A2332;
  --color-bg-card: #232935;
  --color-bg-card-dark: #161B24;
  
  /* Primary Accent - Neon Green */
  --color-primary: #00E676;
  --color-primary-dim: rgba(0, 230, 118, 0.1);
  --color-primary-glow: rgba(0, 230, 118, 0.3);
  
  /* Secondary Colors */
  --color-secondary: #2979FF;
  --color-tertiary: #B388FF;
  --color-warning: #FFB300;
  --color-error: #FF5252;
  
  /* Text Colors */
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #8B949E;
  --color-text-muted: #586069;
  
  /* Border */
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-hover: rgba(255, 255, 255, 0.12);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-glow: 0 0 30px rgba(0, 230, 118, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-elevated: 0 8px 32px rgba(0, 0, 0, 0.5);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
  --font-size-3xl: 36px;
  --font-size-4xl: 48px;
  --font-size-5xl: 64px;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;
  
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-deep);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Effects */
.bg-gradient {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 230, 118, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(41, 121, 255, 0.05), transparent),
    var(--color-bg-deep);
}

.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: -1;
  background-image: 
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--spacing-md) 0;
  background: rgba(8, 11, 19, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-normal);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-card-dark));
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  overflow: hidden;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: var(--letter-spacing-tight);
}

.logo-text span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

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

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
}

/* Hero Section */
.hero {
  padding: calc(80px + var(--spacing-4xl)) 0 var(--spacing-4xl);
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--color-primary-dim);
  border: 1px solid rgba(0, 230, 118, 0.2);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--spacing-lg);
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-app-icon {
  width: 120px;
  height: 120px;
  margin: 0 auto var(--spacing-xl);
  border-radius: var(--radius-2xl);
  background: linear-gradient(145deg, var(--color-bg-card), var(--color-bg-card-dark));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-glow), var(--shadow-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.hero-app-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
}

.hero-app-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-app-icon svg {
  width: 64px;
  height: 64px;
  color: var(--color-primary);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1DE9B6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
  line-height: var(--line-height-relaxed);
}

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

@media (max-width: 768px) {
  .hero {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
  }
  
  .hero-title {
    font-size: var(--font-size-3xl);
  }
  
  .hero-app-icon {
    width: 96px;
    height: 96px;
  }
}

/* Buttons */
.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-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #00C853 100%);
  color: #000;
  box-shadow: 0 4px 20px rgba(0, 230, 118, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 230, 118, 0.4);
}

.btn-secondary {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-bg-surface-highlight);
  border-color: var(--color-border-hover);
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* Features Section */
.section {
  padding: var(--spacing-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* Feature Card */
.feature-card {
  position: relative;
  padding: var(--spacing-xl);
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-card-dark) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  transition: var(--transition-normal);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-elevated);
}

.feature-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  border-radius: var(--radius-md);
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.feature-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Stats Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

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

.stat-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-card-dark) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
}

.stat-value {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  letter-spacing: var(--letter-spacing-tight);
  background: linear-gradient(135deg, var(--color-primary) 0%, #1DE9B6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

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

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  padding: var(--spacing-lg) 0;
  background: none;
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  font-weight: 600;
  font-family: inherit;
  transition: var(--transition-fast);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--color-primary);
}

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

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Contact Section */
.contact-section {
  text-align: center;
}

.contact-card {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-3xl);
  background: linear-gradient(180deg, var(--color-bg-card) 0%, var(--color-bg-card-dark) 100%);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--color-primary-dim) 0%, transparent 70%);
  pointer-events: none;
}

.contact-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  border-radius: var(--radius-lg);
  background: var(--color-primary-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.contact-icon svg {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.contact-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.contact-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition-fast);
}

.contact-email:hover {
  background: var(--color-bg-surface-highlight);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

/* Footer */
.footer {
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-card-dark));
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.footer-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.footer-logo-text {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text-primary);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
}

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

.footer-copyright {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

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

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

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

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

/* Selection */
::selection {
  background: var(--color-primary);
  color: #000;
}