:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --secondary: #34d399;
  --success: #10b981;
  --danger: #ef4444;
  --text-primary: #1a202c;
  --text-secondary: #718096;
  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --border: #e2e8f0;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--bg-primary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.logo-icon {
  width: 32px;
  height: 32px;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  transition: color 0.2s;
}

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

.btn-login {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: background 0.2s;
}

.btn-login:hover {
  background: var(--bg-secondary);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white !important;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.2s, box-shadow 0.2s;
  border: none;
  cursor: pointer;
}

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

.btn-secondary {
  background: white;
  color: var(--primary);
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 2px solid var(--primary);
  transition: all 0.2s;
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--primary);
  color: white;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, #10b98115 0%, #34d39915 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

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

.hero-stats {
  display: flex;
  gap: 3rem;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat strong {
  font-size: 2rem;
  color: var(--primary);
}

.stat span {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Phone Mockup */
.phone-mockup {
  position: relative;
  width: 300px;
  height: 600px;
  background: #1a202c;
  border-radius: 40px;
  padding: 15px;
  box-shadow: var(--shadow-lg);
  margin: 0 auto;
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: #e5ddd5;
  border-radius: 30px;
  overflow: hidden;
  padding: 1rem;
}

.chat-preview {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chat-message {
  max-width: 80%;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.9rem;
}

.chat-message.received {
  background: white;
  align-self: flex-start;
}

.chat-message.sent {
  background: #dcf8c6;
  align-self: flex-end;
  margin-left: auto;
}

/* Features Section */
.features {
  padding: 6rem 0;
}

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

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-header p {
  font-size: 1.25rem;
  color: var(--text-secondary);
}

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

.feature-card {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

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

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: white;
}

.feature-icon i {
  width: 32px;
  height: 32px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

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

/* How It Works */
.how-it-works {
  padding: 6rem 0;
  background: var(--bg-secondary);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  margin-top: 3rem;
}

.step {
  text-align: center;
}

.step-number {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 auto 1.5rem;
}

.step h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

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

/* Pricing Section */
.pricing {
  padding: 6rem 0;
}

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

.pricing-card {
  background: white;
  padding: 2.5rem;
  border-radius: 16px;
  border: 2px solid var(--border);
  position: relative;
  transition: all 0.3s;
}

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

.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.price {
  display: flex;
  align-items: baseline;
  margin-bottom: 2rem;
}

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

.amount {
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary);
}

.period {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-left: 0.5rem;
}

.features-list {
  list-style: none;
  margin-bottom: 2rem;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}

.features-list li:last-child {
  border-bottom: none;
}

.features-list i {
  color: var(--success);
  width: 20px;
  height: 20px;
}

/* CTA Section */
.cta {
  padding: 6rem 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
}

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

.cta h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.cta p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

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

.cta .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 4rem 0 2rem;
}

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

.footer-section h4 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-section a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  margin-bottom: 0.5rem;
  transition: color 0.2s;
}

.footer-section a:hover {
  color: white;
}

.footer-section p {
  color: rgba(255, 255, 255, 0.7);
  margin-top: 1rem;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero {
    padding: 6rem 0 3rem;
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .features-grid,
  .steps,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .phone-mockup {
    width: 250px;
    height: 500px;
  }
}