:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-surface: #16161f;
  --bg-card: #1a1a24;
  --text-primary: #f5f5f7;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-primary: #8b5cf6;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
  --accent-glow: rgba(139, 92, 246, 0.3);
  --border-color: #27272a;
  --border-light: #3f3f46;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --font-heading: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
}

.logo-icon {
  font-size: 1.8rem;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  touch-action: manipulation;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px var(--accent-glow);
}

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

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

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

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

.btn-lg {
  padding: 16px 32px;
  font-size: 1.1rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.install-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.85rem;
  padding: 8px 16px;
}

.install-btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: var(--accent-primary);
  top: -200px;
  right: -100px;
  animation: float 8s ease-in-out infinite;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: var(--accent-secondary);
  bottom: -150px;
  left: -100px;
  animation: float 10s ease-in-out infinite reverse;
}

.grid-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.05) 1px, transparent 0);
  background-size: 40px 40px;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

.badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 0%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Sections */
.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-secondary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* TTS Section */
.tts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.tts-panel, .image-panel, .video-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
}

textarea, input[type="text"] {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  resize: vertical;
  transition: var(--transition);
  position: relative;
  z-index: 10;
  touch-action: manipulation;
  -webkit-user-select: text;
  user-select: text;
}

textarea:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

textarea {
  min-height: 140px;
  margin-bottom: 8px;
}

.char-count {
  text-align: right;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.voice-presets label, .style-selector label, .control-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.preset-grid, .style-options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}

.preset-btn, .style-btn {
  padding: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  touch-action: manipulation;
}

.preset-btn:hover, .style-btn:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.preset-btn.active, .style-btn.active {
  background: rgba(139, 92, 246, 0.2);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.controls-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.control-group input[type="range"] {
  width: 100%;
  margin-top: 8px;
  accent-color: var(--accent-primary);
}

.tts-actions, .image-actions, .video-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.status-bar {
  padding: 12px;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-align: center;
  border: 1px solid var(--border-color);
}

.tts-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.audio-visualizer {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 120px;
  margin-bottom: 32px;
}

.bar {
  width: 12px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
  height: 20px;
  transition: height 0.1s ease;
}

.audio-visualizer.playing .bar {
  animation: bounce 0.5s ease-in-out infinite alternate;
}

.bar:nth-child(1) { animation-delay: 0.0s; }
.bar:nth-child(2) { animation-delay: 0.1s; }
.bar:nth-child(3) { animation-delay: 0.2s; }
.bar:nth-child(4) { animation-delay: 0.3s; }
.bar:nth-child(5) { animation-delay: 0.4s; }
.bar:nth-child(6) { animation-delay: 0.3s; }
.bar:nth-child(7) { animation-delay: 0.2s; }
.bar:nth-child(8) { animation-delay: 0.1s; }

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

.voice-info h3 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.voice-info p {
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.voice-features {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.tag {
  padding: 6px 12px;
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  color: var(--accent-secondary);
}

/* Image & Video Sections */
.image-grid, .video-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.image-display, .video-display {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 24px;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.image-placeholder, .video-placeholder {
  text-align: center;
  color: var(--text-muted);
}

.placeholder-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.5;
}

#generatedImage, #generatedVideo {
  max-width: 100%;
  max-height: 500px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

.video-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

select {
  width: 100%;
  padding: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  cursor: pointer;
  touch-action: manipulation;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

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

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin-bottom: 12px;
}

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

/* Process */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  counter-reset: step;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: var(--transition);
}

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

.step-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: rgba(139, 92, 246, 0.2);
  position: absolute;
  top: 16px;
  right: 24px;
}

.step h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-bottom: 12px;
  margin-top: 16px;
}

.step p {
  color: var(--text-secondary);
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.quote {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 24px;
  line-height: 1.7;
  font-style: italic;
}

.author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 48px;
  height: 48px;
  background: var(--bg-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.name {
  font-weight: 600;
  color: var(--text-primary);
}

.role {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

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

.faq-question {
  width: 100%;
  padding: 24px 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  touch-action: manipulation;
}

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

.faq-icon {
  font-size: 1.5rem;
  transition: var(--transition);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 24px;
}

/* CTA */
.cta-box {
  background: var(--accent-gradient);
  border-radius: var(--radius-xl);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-box h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
}

.cta-box p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 32px;
  position: relative;
}

.cta-actions {
  position: relative;
}

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

.cta-actions .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin: 16px 0 24px;
  max-width: 300px;
}

.social-links {
  display: flex;
  gap: 16px;
}

.social-links a {
  width: 40px;
  height: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

.footer-links h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-links a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 12px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent-primary);
  transform: translateX(4px);
}

.footer-bottom {
  text-align: center;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

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

@keyframes bounce {
  0% { height: 20px; }
  100% { height: 80px; }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
  .tts-grid, .image-grid, .video-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-stats {
    gap: 24px;
  }
  
  .controls-row, .video-controls {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .install-btn {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }
  
  .btn-lg {
    width: 100%;
  }
  
  .preset-grid, .style-options {
    grid-template-columns: repeat(2, 1fr);
  }
}