:root {
  --primary: #0e3a53;
  --primary-dark: #082433;
  --secondary: #50d56b;
  --accent: #ff6b6b;
  --dark: #1a1a2e;
  --gray: #636e72;
  --light: #dfe6e9;
  --white: #ffffff;
  --gradient-1: linear-gradient(135deg, #0e3a53 0%, #50d56b 100%);
  --gradient-2: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
  --gradient-3: linear-gradient(135deg, #50d56b 0%, #90e0ef 100%);
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary);
}

.logo-img {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.logo-icon {
  font-size: 2rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--gray);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.language-switcher {
  display: flex;
  background: var(--light);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}

.lang-btn {
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  color: var(--gray);
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-btn.active {
  background: var(--primary);
  color: var(--white);
}

.lang-btn:hover:not(.active) {
  background: var(--white);
}

.cta-button {
  background: var(--gradient-1);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 2rem 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--gradient-2);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: float 8s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: var(--gradient-3);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
  animation: float 6s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: slideUp 1s ease-out;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.badge-icon {
  font-size: 1.2rem;
}

.badge-text {
  font-weight: 500;
  color: var(--primary);
  font-size: 0.875rem;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--gray);
  margin-bottom: 2rem;
  line-height: 1.6;
  max-width: 500px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.cta-primary {
  background: var(--gradient-1);
  color: var(--white);
  padding: 1rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
}

.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-secondary {
  background: var(--white);
  color: var(--primary);
  padding: 1rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  border: 2px solid var(--primary);
  transition: all 0.3s ease;
}

.cta-secondary:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray);
  margin-top: 0.25rem;
}

.hero-visual {
  position: relative;
  height: 500px;
}

.floating-card {
  position: absolute;
  background: var(--white);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 250px;
  animation: floatCard 6s ease-in-out infinite;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-10px) rotate(1deg); }
  50% { transform: translateY(-20px) rotate(0deg); }
  75% { transform: translateY(-10px) rotate(-1deg); }
}

.card-1 {
  top: 10%;
  left: 0;
  animation-delay: 0s;
}

.card-2 {
  top: 40%;
  right: 0;
  animation-delay: 2s;
}

.card-3 {
  bottom: 10%;
  left: 25%;
  animation-delay: 4s;
}

.card-icon {
  font-size: 2.5rem;
}

.card-text {
  flex: 1;
}

.card-title {
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 0.25rem;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--gray);
}

/* Features Section */
.features {
  padding: 6rem 2rem;
  background: var(--white);
}

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

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--white);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--light);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--dark);
}

.feature-desc {
  color: var(--gray);
  line-height: 1.6;
}

/* Lightpaper Section */
.lightpaper {
  padding: 6rem 2rem;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.lightpaper-content {
  background: var(--white);
  border-radius: 20px;
  padding: 2rem;
  box-shadow: var(--shadow);
}

.paper-nav {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  padding-bottom: 1rem;
}

.paper-tab {
  padding: 0.75rem 1.5rem;
  border: none;
  background: var(--light);
  color: var(--gray);
  font-weight: 500;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.paper-tab.active {
  background: var(--gradient-1);
  color: var(--white);
}

.paper-tab:hover:not(.active) {
  background: var(--white);
}

.paper-content {
  min-height: 400px;
}

.paper-section {
  display: none;
}

.paper-section.active {
  display: block;
}

.paper-section h3 {
  font-size: 1.5rem;
  color: var(--dark);
  margin-bottom: 1rem;
}

.paper-section h4 {
  font-size: 1.125rem;
  color: var(--primary);
  margin: 1rem 0 0.5rem;
}

.paper-section p {
  color: var(--gray);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.paper-section ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

.paper-section li {
  color: var(--gray);
  margin-bottom: 0.5rem;
}

/* Footer */
.footer {
  background: var(--dark);
  color: var(--white);
  padding: 3rem 2rem 1rem;
}

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

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.footer-logo-img {
  height: 24px;
  width: auto;
  object-fit: contain;
}

.footer-tagline {
  color: var(--gray);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-link {
  color: var(--light);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

.footer-bottom p {
  color: var(--gray);
  font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-visual {
    height: 400px;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-stats {
    justify-items: center;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .nav-container {
    padding: 1rem;
  }

  .hero {
    padding: 5rem 1rem 2rem;
  }

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

  .hero-stats {
    grid-template-columns: 1fr;
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.feature-card {
  animation: fadeIn 0.6s ease-out;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }