/* ============================================
   🎨 Modern Voice Translator Landing — 2025
   Design System: Glassmorphism + Fluid Typography
   ============================================ */

:root {
  /* Color Palette: Deep Purple + Cyan Accent */
  --bg-primary: #0a0e1a;
  --bg-secondary: #0f1419;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  --primary: #8b5cf6;
  --primary-dark: #7c3aed;
  --primary-light: #a78bfa;
  --accent: #06b6d4;
  --accent-dark: #0891b2;
  --accent-light: #22d3ee;
  
  --success: #10b981;
  --warning: #f59e0b;
  
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: rgba(0, 0, 0, 0.3);
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Typography Scale */
  --font-display: 'Inter', 'Manrope', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  
  /* Animations */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   🔤 Typography & Base Styles
   ============================================ */

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

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

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-secondary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

/* Enhanced background with animated gradients */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: 
    radial-gradient(circle at 20% 10%, rgba(139, 92, 246, 0.15), transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(6, 182, 212, 0.12), transparent 50%),
    radial-gradient(circle at 40% 80%, rgba(139, 92, 246, 0.1), transparent 50%);
  animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.1); }
}

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

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

/* Fluid Typography */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  margin-bottom: var(--space-sm);
}

/* ============================================
   🧭 Header Navigation
   ============================================ */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  width: 100%;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
  gap: var(--space-md);
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--transition-base);
}

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

.nav {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.nav a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition-base);
}

.nav a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width var(--transition-base);
}

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

.nav a:hover::after {
  width: 100%;
}

.lang-switch {
  display: flex;
  gap: var(--space-xs);
}

/* Select-based language switcher */
.lang-select {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  backdrop-filter: blur(8px);
}

.lang-select:hover {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.1);
}

.lang-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

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

.hero {
  padding: var(--space-2xl) 0 var(--space-xl);
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -100px 0 0 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1400px 900px at 75% -5%, rgba(139, 92, 246, 0.25), transparent),
    radial-gradient(1200px 700px at -5% 15%, rgba(6, 182, 212, 0.15), transparent);
  opacity: 0.9;
}

.grid2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__text h1 {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  line-height: 1.1;
  margin: 0 0 var(--space-lg);
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.8s ease-out;
}

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

.lead {
  color: var(--text-secondary);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.cta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.note {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.note::before {
  content: "✨";
  font-size: 1.1em;
}

/* ============================================
   🎯 Buttons & CTAs
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  padding: 1rem 2rem;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  text-transform: none;
  letter-spacing: -0.01em;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 
    0 4px 12px rgba(139, 92, 246, 0.3),
    0 2px 6px rgba(0, 0, 0, 0.2);
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 8px 20px rgba(139, 92, 246, 0.4),
    0 4px 10px rgba(0, 0, 0, 0.3);
}

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

.btn-outline {
  border: 2px solid var(--glass-border);
  color: var(--text-primary);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.1);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}
/* ============================================
   🃏 Cards & Glassmorphism
   ============================================ */

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(6, 182, 212, 0.05));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: 
    0 20px 40px rgba(139, 92, 246, 0.2),
    0 0 60px rgba(139, 92, 246, 0.1);
}

.card__title {
  font-weight: 600;
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.list {
  margin: var(--space-md) 0 0 0;
  padding-left: var(--space-lg);
  color: var(--text-secondary);
  list-style: none;
}

.list li {
  margin: var(--space-sm) 0;
  padding-left: var(--space-md);
  position: relative;
  line-height: 1.6;
}

.list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

/* ============================================
   📦 Sections & Layout
   ============================================ */

.section {
  padding: var(--space-2xl) 0;
  position: relative;
}

.section > .container {
  padding-top: 0;
}

.section.alt {
  background: linear-gradient(180deg, 
    rgba(255, 255, 255, 0.02), 
    rgba(255, 255, 255, 0.01),
    transparent
  );
}

.section h2 {
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section h2::after {
  content: "";
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}
/* ============================================
   ✨ Features Grid
   ============================================ */

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.feature {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px !important;
  padding: var(--space-lg);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(139, 92, 246, 0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature:hover::before {
  opacity: 1;
}

.feature:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: 
    0 16px 32px rgba(139, 92, 246, 0.15),
    0 0 40px rgba(139, 92, 246, 0.1);
}

.feature__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
  display: inline-block;
  transition: transform var(--transition-slow);
  filter: drop-shadow(0 4px 8px rgba(139, 92, 246, 0.3));
}

.feature:hover .feature__icon {
  transform: scale(1.1) rotate(5deg);
  animation: bounce 0.6s ease;
}

@keyframes bounce {
  0%, 100% { transform: scale(1.1) rotate(5deg) translateY(0); }
  50% { transform: scale(1.1) rotate(5deg) translateY(-8px); }
}

.feature h3 {
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.feature p {
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* ============================================
   📝 Steps & How It Works
   ============================================ */

.steps {
  max-width: 900px;
  margin: 0 auto;
  color: var(--text-secondary);
  list-style: none;
  counter-reset: step-counter;
  padding: 0;
}

.steps li {
  counter-increment: step-counter;
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  padding-left: calc(var(--space-xl) + var(--space-lg));
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  line-height: 1.6;
  font-size: 1.05rem;
}

.steps li::before {
  content: counter(step-counter);
  position: absolute;
  left: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
}

.steps li:hover {
  transform: translateX(8px);
  border-color: rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.05);
}

.center {
  text-align: center;
  margin-top: var(--space-xl);
}
/* ============================================
   💰 Pricing
   ============================================ */

.pricing {
  display: flex;
  justify-content: center;
  margin-top: var(--space-xl);
}

.price-card {
  max-width: 480px;
  width: 100%;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-slow);
}

.price-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, rgba(139, 92, 246, 0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.price-card:hover::before {
  opacity: 1;
}

.price-card:hover {
  transform: translateY(-12px);
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: 
    0 24px 48px rgba(139, 92, 246, 0.25),
    0 0 80px rgba(139, 92, 246, 0.15);
}

.price-name {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.price-value {
  font-size: 2rem;
  font-weight: 700;
  margin: var(--space-md) 0 var(--space-lg);
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.small li {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.price-card .btn {
  width: 100%;
  margin-top: var(--space-lg);
}

.muted {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: var(--space-md);
  text-align: center;
}

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

details {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin: var(--space-md) 0;
  cursor: pointer;
  transition: all var(--transition-base);
}

details:hover {
  border-color: rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.05);
}

details[open] {
  border-color: var(--primary);
  background: rgba(139, 92, 246, 0.08);
}

summary {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

summary::-webkit-details-marker {
  display: none;
}

summary::before {
  content: "▶";
  color: var(--accent);
  transition: transform var(--transition-base);
  font-size: 0.8em;
}

details[open] summary::before {
  transform: rotate(90deg);
}

details p {
  margin-top: var(--space-md);
  padding-left: calc(var(--space-sm) + 0.8em);
  color: var(--text-secondary);
  line-height: 1.6;
}

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

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

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

.footer__links {
  display: flex;
  gap: var(--space-lg);
}

.footer__links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition-base);
}

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

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

@media (max-width: 960px) {
  .grid2 {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .hero {
    min-height: auto;
    padding: var(--space-xl) 0;
  }
  
  .features {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .section {
    padding: var(--space-xl) 0;
  }
}

@media (max-width: 640px) {
  :root {
    --space-xl: 3rem;
    --space-2xl: 4rem;
  }
  
  .hero__text h1 {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }
  
  .nav {
    display: none;
  }
  
  .features {
    grid-template-columns: 1fr;
  }
  
  .cta {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .steps li {
    padding: var(--space-md);
    padding-left: calc(var(--space-lg) + 60px);
  }
  
  .steps li::before {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }
  
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
  
  .footer__links {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

/* ============================================
   ⚡ Performance & Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Dark theme optimizations */
@media (prefers-color-scheme: light) {
  /* If needed, add light theme overrides here */
  /* Currently designed primarily for dark theme */
}

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

.hidden {
  display: none !important;
}

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

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

/* Scroll reveal animation utility */
.scroll-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

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