/* ========================================
   Premium Subscription Landing Page Styles
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #131318;
  --color-bg-tertiary: #1a1a24;
  
  /* Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  
  /* Glass Effects */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  
  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #b8b8d1;
  --color-text-muted: #6b6b8c;
  
  /* Accent Colors */
  --color-accent-purple: #667eea;
  --color-accent-pink: #f093fb;
  --color-accent-blue: #4facfe;
  --color-accent-success: #10b981;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Typography */
  --font-primary: 'Outfit', 'Vazirmatn', sans-serif;
  --font-persian: 'Vazirmatn', sans-serif;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

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

body {
  font-family: var(--font-primary);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  direction: rtl;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-persian);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

/* ========================================
   Utility Classes
   ======================================== */

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

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px 0 rgba(102, 126, 234, 0.3);
  border-color: rgba(102, 126, 234, 0.4);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: var(--radius-xl);
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: var(--font-persian);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(102, 126, 234, 0.6);
}

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

.btn-secondary:hover {
  background: var(--color-accent-purple);
  transform: translateY(-2px);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-persian);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}

.nav-menu {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  align-items: center;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-family: var(--font-persian);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  right: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

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

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.mobile-toggle span {
  width: 28px;
  height: 3px;
  background: white;
  border-radius: 3px;
  transition: all var(--transition-normal);
}

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

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, transparent 70%);
  transform: translateX(-50%);
  animation: pulse 8s ease-in-out infinite;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.8s ease-out;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-feature {
  text-align: center;
}

.hero-feature-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  display: inline-block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-feature h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.hero-feature p {
  font-size: 1rem;
  color: var(--color-text-muted);
}

/* ========================================
   Features Section
   ======================================== */

.features {
  background: var(--color-bg-secondary);
}

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

.section-subtitle {
  color: var(--color-accent-purple);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
}

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

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  position: relative;
}

.feature-icon::before {
  content: '';
  position: absolute;
  inset: -3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  opacity: 0.3;
  filter: blur(10px);
  z-index: -1;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  font-size: 1rem;
  line-height: 1.8;
}

/* ========================================
   Pricing Section
   ======================================== */

.pricing {
  background: var(--color-bg-primary);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.pricing-card {
  position: relative;
  padding: var(--spacing-xl);
  text-align: center;
}

.pricing-card.featured {
  transform: scale(1.05);
  border: 2px solid var(--color-accent-purple);
}

.pricing-badge {
  position: absolute;
  top: -15px;
  right: 50%;
  transform: translateX(50%);
  background: var(--gradient-primary);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: var(--radius-xl);
  font-size: 0.9rem;
  font-weight: 600;
}

.pricing-header h3 {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: var(--spacing-md) 0;
}

.pricing-price span {
  font-size: 1.2rem;
  color: var(--color-text-muted);
}

.pricing-features {
  list-style: none;
  margin: var(--spacing-xl) 0;
  text-align: right;
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-accent-success);
  font-weight: bold;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.pricing-features li.disabled {
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.pricing-features li.disabled::before {
  content: '✗';
  color: var(--color-text-muted);
}

/* ========================================
   FAQ Section
   ======================================== */

.faq {
  background: var(--color-bg-secondary);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: var(--spacing-md);
}

.faq-question {
  width: 100%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  color: white;
  font-size: 1.1rem;
  font-weight: 600;
  font-family: var(--font-persian);
  text-align: right;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--color-accent-purple);
}

.faq-icon {
  transition: transform var(--transition-normal);
  font-size: 1.5rem;
  color: var(--color-accent-purple);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

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

.faq-answer-content {
  padding: var(--spacing-md) 0;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ========================================
   CTA Section
   ======================================== */

.cta {
  background: var(--color-bg-primary);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  right: 50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(240, 147, 251, 0.1) 0%, transparent 70%);
  transform: translate(50%, -50%);
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.cta h2 {
  margin-bottom: var(--spacing-md);
}

.cta p {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xl);
}

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

.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

.footer-section h3 {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-purple);
}

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

/* ========================================
   Animations
   ======================================== */

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

@keyframes pulse {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: rgba(19, 19, 24, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    justify-content: center;
    transition: right var(--transition-normal);
    padding: var(--spacing-xl);
  }

  .nav-menu.active {
    right: 0;
  }

  .mobile-toggle {
    display: flex;
  }

  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

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

  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  .hero-buttons {
    flex-direction: column;
  }

  .pricing-card.featured {
    transform: scale(1);
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 2.5rem;
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }
}

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

  .hero-features {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .btn {
    padding: 0.9rem 2rem;
    font-size: 1rem;
  }
}