:root {
  --primary-color: #2C3E50;
  --secondary-color: #3498DB;
  --accent-color: #E74C3C;
  --light-color: #ECF0F1;
  --dark-color: #1A252F;
  --text-color: #333333;
  --gradient-start: #2C3E50;
  --gradient-end: #3498DB;
}

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

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--light-color);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar Styles */
.navbar {
  background-color: var(--primary-color);
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: white;
}

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

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: white;
}

/* Hero Section */
.hero {
  background: linear-gradient(120deg, var(--gradient-start), var(--gradient-end));
  padding: 9rem 0 6rem;
  text-align: center;
  color: white;
  clip-path: polygon(0 0, 100% 0, 100% 85%, 50% 100%, 0 85%);
  margin-bottom: 3rem;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  line-height: 1.6;
  font-weight: 300;
}

.btn {
  display: inline-block;
  padding: 15px 35px;
  background-color: var(--accent-color);
  color: white;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  text-transform: uppercase;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0,0,0,0.3);
  background-color: #d63c2e;
}

/* Section Styles */
section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.2rem;
  color: var(--primary-color);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

/* Features */
.features {
  background-color: white;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}

.feature {
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
  text-align: center;
  background-color: var(--light-color);
  position: relative;
  overflow: hidden;
}

.feature::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background-color: var(--secondary-color);
}

.feature:hover {
  transform: translateY(-10px);
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin-bottom: 1.5rem;
}

.feature h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* How It Works */
.how-it-works {
  background-color: var(--light-color);
}

.steps {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
}

.step {
  flex: 0 0 calc(33.333% - 40px);
  min-width: 250px;
  max-width: 350px;
  margin: 20px;
  position: relative;
  padding: 2rem;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  text-align: center;
}

.step-number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  background-color: var(--accent-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* CTA Section */
.cta {
  background: linear-gradient(135deg, var(--accent-color), #C0392B);
  color: white;
  text-align: center;
  padding: 5rem 0;
  margin-top: 3rem;
}

.cta h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.cta p {
  font-size: 1.2rem;
  margin-bottom: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta .btn:hover {
  background-color: var(--light-color);
}

/* Footer */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 3rem 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-column h4 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--secondary-color);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: #a1a1a1;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--secondary-color);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 1.5rem;
}

.footer-logo .logo-icon {
  width: 40px;
  height: 40px;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  color: #a1a1a1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .btn {
    padding: 12px 25px;
    font-size: 0.9rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .steps {
    flex-direction: column;
    align-items: center;
  }
  
  .step {
    margin-bottom: 40px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
}

.hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.face-swap-demo {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 3rem auto;
  gap: 20px;
  max-width: 800px;
}

.face-icon {
  width: 100px;
  height: 100px;
}

.swap-arrow {
  color: var(--accent-color);
  font-size: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}