:root {
  --bg-primary: #0b0f1a;
  --bg-secondary: #0f1629;
  --bg-tertiary: #1a2338;
  --bg-glass: rgba(15, 22, 37, 0.8);
  --bg-glass-light: rgba(255, 255, 255, 0.03);
  
  --accent-primary: #3c6eff;
  --accent-secondary: #2563eb;
  --accent-glow: rgba(60, 110, 255, 0.3);
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-error: #ef4444;
  
  --text-primary: #e5edff;
  --text-secondary: #7a8bb7;
  --text-muted: #4a5578;
  
  --border-color: #2a3550;
  --border-light: rgba(255, 255, 255, 0.08);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px var(--accent-glow);
  --shadow-strong: 0 10px 40px rgba(0, 0, 0, 0.4);
  
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Nunito', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 600;
  background: radial-gradient(ellipse at center, #0f1629 0%, #0b0f1a 40%, #060810 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

body,
button,
input,
textarea,
select {
  font-family: 'Nunito', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 600;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  box-shadow: 0 4px 12px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-glass {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

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

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

/* Z-index management */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 15, 26, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}

main {
  position: relative;
  z-index: 10;
}

.bg-squares {
  z-index: 1;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: white;
  position: relative;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 0 25px rgba(37, 99, 235, 0.3);
}

.logo-text {
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(90deg, #2563eb, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.inline-logo-text {
  font-family: 'Nunito', sans-serif;
  font-weight: 900;
  background: linear-gradient(90deg, #2563eb, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

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

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.header-actions {
  display: flex;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  color: var(--text-primary);
  font-size: 24px;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
  gap: 60px;
}

.hero-content {
  flex: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 14px;
  color: var(--accent-primary);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  display: inline-flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-title-static {
  display: inline-flex;
  align-items: baseline;
}

.gradient-text {
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.animated-text-wrapper {
  display: inline-flex;
  align-items: baseline;
  min-width: 0;
  overflow: hidden;
  position: relative;
  vertical-align: baseline;
  height: var(--animated-line-height, 1em);
  transition: height 220ms ease;
}

.animated-text-track {
  display: flex;
  flex-direction: column;
  gap: 0;
  will-change: transform;
  transform: translateY(0);
}

.text-line {
  display: block;
  white-space: nowrap;
  line-height: 1;
}

.hero-description {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* Enhanced Hero Stats */
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

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

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 280px;
  height: 560px;
  background: var(--bg-secondary);
  border-radius: 40px;
  border: 3px solid var(--border-color);
  padding: 12px;
  box-shadow: var(--shadow-lg), 0 0 60px var(--accent-glow);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  border-radius: 28px;
  overflow: hidden;
}

.chat-preview {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.chat-header-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.avatar-sm {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  border-radius: 50%;
}

.chat-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.chat-name {
  font-weight: 600;
  font-size: 14px;
}

.chat-status {
  font-size: 12px;
  color: var(--accent-success);
}

.chat-actions-preview {
  display: flex;
  gap: 16px;
  color: var(--text-secondary);
}

.messages-preview {
  flex: 1;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
}

.message-bubble {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 13px;
  animation: fadeInUp 0.5s ease forwards;
  opacity: 0;
}

.message-bubble:nth-child(1) { animation-delay: 0.2s; }
.message-bubble:nth-child(2) { animation-delay: 0.6s; }
.message-bubble:nth-child(3) { animation-delay: 1s; }
.message-bubble:nth-child(4) { animation-delay: 1.4s; }

.message-bubble.incoming {
  background: var(--bg-tertiary);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.message-bubble.outgoing {
  background: var(--accent-primary);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Sections */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-badge {
  display: inline-block;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--accent-primary);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-description {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Features */
.features {
  padding: 100px 24px;
  background: linear-gradient(180deg, transparent, var(--bg-secondary) 50%, transparent);
}

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

/* Enhanced Feature Cards */
.feature-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.05), transparent);
  transition: left 0.6s;
}

.feature-card:hover::before {
  left: 100%;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  animation: borderGlow 0.3s ease-out;
}

@keyframes borderGlow {
  0% {
    border-color: var(--border-color);
    box-shadow: none;
  }
  50% {
    border-color: rgba(60, 110, 255, 0.5);
    box-shadow: 0 0 20px rgba(60, 110, 255, 0.2);
  }
  100% {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
  }
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Enhanced About Section */
.about {
  padding: 100px 24px;
  position: relative;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
}

.about-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
  padding: 40px 0;
}

.featured-card {
  position: relative;
  animation: pulse 4s ease-in-out infinite;
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 40px var(--accent-glow), var(--shadow-lg);
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 0 40px var(--accent-glow), var(--shadow-lg);
  }
  50% {
    transform: scale(1.02);
    box-shadow: 0 0 60px var(--accent-glow), var(--shadow-lg);
  }
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.about-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.about-list i {
  color: var(--accent-success);
}

.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 200px;
}

.glass-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  animation: glassBorderGlow 0.3s ease-out;
}

@keyframes glassBorderGlow {
  0% {
    border-color: var(--border-color);
    box-shadow: none;
  }
  50% {
    border-color: rgba(60, 110, 255, 0.5);
    box-shadow: 0 0 20px rgba(60, 110, 255, 0.2);
  }
  100% {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
  }
}

.card-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  box-shadow: var(--shadow-glow);
  margin-bottom: 24px;
}

.glass-card h4 {
  font-size: 20px;
  margin-bottom: 12px;
}

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

/* Download */
.download {
  padding: 100px 24px;
  background: linear-gradient(180deg, transparent, var(--bg-secondary) 50%, transparent);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.download-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.1), transparent);
  transition: left 0.6s;
}

.download-card:hover::before {
  left: 100%;
}

.download-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  animation: downloadBorderGlow 0.3s ease-out;
}

@keyframes downloadBorderGlow {
  0% {
    border-color: var(--border-color);
    box-shadow: none;
  }
  50% {
    border-color: rgba(60, 110, 255, 0.5);
    box-shadow: 0 0 20px rgba(60, 110, 255, 0.2);
  }
  100% {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
  }
}

.download-card.active {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.download-card.available {
  border-color: var(--accent-success);
  background: rgba(16, 185, 129, 0.05);
}

.download-card.available:hover {
  background: rgba(16, 185, 129, 0.1);
  transform: translateY(-4px) scale(1.02);
}

.download-card i {
  font-size: 40px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: block;
}

.download-card.available i {
  color: var(--accent-success);
}

.download-card span {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.download-card small {
  color: var(--text-muted);
  font-size: 12px;
}

.download-card.available small {
  color: var(--accent-success);
  font-weight: 600;
}

/* CTA */
.cta {
  padding: 100px 24px;
}

.cta-content {
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  border-radius: var(--radius-xl);
  padding: 60px;
  text-align: center;
}

.cta-content h2 {
  font-size: 32px;
  margin-bottom: 16px;
}

.cta-content p {
  opacity: 0.9;
  margin-bottom: 32px;
}

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

.cta-content .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 24px 24px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 16px;
  font-size: 14px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 13px;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-menu.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 280px;
  background: var(--bg-secondary);
  padding: 24px;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-menu.active .mobile-menu-content {
  transform: translateX(0);
}

.mobile-menu-close {
  position: absolute;
  top: 24px;
  right: 24px;
  color: var(--text-secondary);
  font-size: 24px;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 60px;
}

.mobile-nav a {
  font-size: 18px;
  color: var(--text-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

/* Snow Effect */
#snow-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  display: none;
}

#snow-container.active {
  display: block;
}

.snowflake {
  position: absolute;
  color: white;
  opacity: 0.6;
  font-size: 10px;
  animation: snowfall linear infinite;
}

@keyframes snowfall {
  0% {
    transform: translateY(-10px) rotate(0deg);
  }
  100% {
    transform: translateY(100vh) rotate(360deg);
  }
}

/* Responsive */
@media (max-width: 992px) {
  .hero {
    flex-direction: column;
    text-align: center;
    padding-top: 100px;
  }
  
  .hero-title {
    justify-content: center;
    align-items: center;
    text-align: center;
  }
  
  .hero-visual {
    display: none;
  }
  
  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav, .header-actions {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero-title {
    font-size: 36px;
  }
  
  .phone-mockup {
    width: 240px;
    height: 480px;
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
}