/* TSUNG Landing Page Styles
 * Design: Cyberpunk Noir meets Minimalist Tech
 * Quantum Lock: ql_landing_styles_v1_2026_01_21
 */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

:root {
  /* Core Palette - Electric Midnight */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.6);
  
  /* Accent Colors - Neon Circuit */
  --accent-cyan: #00fff5;
  --accent-magenta: #ff00ff;
  --accent-gold: #ffd700;
  --accent-emerald: #00ff88;
  
  /* Text */
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  
  /* Gradients */
  --gradient-hero: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-magenta) 100%);
  --gradient-card: linear-gradient(180deg, rgba(0,255,245,0.1) 0%, rgba(255,0,255,0.05) 100%);
  --gradient-bg: radial-gradient(ellipse at 50% 0%, rgba(0,255,245,0.15) 0%, transparent 50%);
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Background Effects */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(rgba(0,255,245,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,245,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -1;
}

.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(150px);
  opacity: 0.3;
  pointer-events: none;
  z-index: -1;
}

.bg-glow-1 {
  top: -200px;
  left: -200px;
  background: var(--accent-cyan);
}

.bg-glow-2 {
  bottom: -200px;
  right: -200px;
  background: var(--accent-magenta);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

.mono {
  font-family: 'JetBrains Mono', monospace;
}

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

/* Layout */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-sm) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary);
  text-decoration: none;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-hero);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

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

.nav-link:hover {
  color: var(--accent-cyan);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--gradient-hero);
  color: var(--bg-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(0, 255, 245, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1rem;
  background: rgba(0, 255, 245, 0.1);
  border: 1px solid rgba(0, 255, 245, 0.3);
  border-radius: 100px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: var(--accent-cyan);
  margin-bottom: var(--space-md);
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent-emerald);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero-title {
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  max-width: 600px;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-md);
}

.feature-card {
  padding: var(--space-md);
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-hero);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 255, 245, 0.2);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 255, 245, 0.1);
  border-radius: var(--radius-md);
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.feature-title {
  margin-bottom: var(--space-xs);
}

.feature-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Stats Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  text-align: center;
}

.stat-item {
  padding: var(--space-md);
}

.stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: var(--space-xs);
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
  max-width: 1100px;
  margin: 0 auto;
}

.pricing-card {
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xl);
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card.featured {
  border-color: var(--accent-cyan);
  background: var(--gradient-card);
}

.pricing-card.featured::before {
  content: '最受歡迎';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 1rem;
  background: var(--gradient-hero);
  color: var(--bg-primary);
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 100px;
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-name {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin-bottom: var(--space-md);
}

.pricing-currency {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.pricing-amount {
  font-family: 'JetBrains Mono', monospace;
  font-size: 3.5rem;
  font-weight: 700;
}

.pricing-period {
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-md);
}

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

.pricing-features li::before {
  content: '✓';
  color: var(--accent-emerald);
  font-weight: 700;
}

/* CTA Section */
.cta {
  text-align: center;
  padding: var(--space-xl) 0;
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  margin: var(--space-xl) 0;
}

.cta-title {
  margin-bottom: var(--space-sm);
}

.cta-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.footer {
  padding: var(--space-lg) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-copy {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Code Block */
.code-block {
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  overflow-x: auto;
}

.code-block .comment { color: var(--text-muted); }
.code-block .keyword { color: var(--accent-magenta); }
.code-block .string { color: var(--accent-emerald); }
.code-block .function { color: var(--accent-cyan); }

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

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

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

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

/* Section Header */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-lg);
}

.section-header p {
  color: var(--text-secondary);
  margin-top: var(--space-sm);
}