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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f8f9fa;
}

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

header {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 90px;
}

.nav-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 10px;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: #2c3e50;
  margin: 0;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
  margin: 0 0 15px 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #3498db;
}

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 120px 0 80px;
  text-align: center;
  margin-top: 70px;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: 1.3rem;
  margin-bottom: 40px;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 15px 30px;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background: #fff;
  color: #667eea;
}

.btn-primary:hover {
  background: transparent;
  color: #fff;
  border-color: #fff;
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: #fff;
}

.btn-secondary:hover {
  background: #fff;
  color: #667eea;
  transform: translateY(-2px);
}

.features {
  padding: 80px 0;
  background: #fff;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
  color: #2c3e50;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 40px;
}

.feature-card {
  text-align: center;
  padding: 40px 20px;
  border-radius: 10px;
  background: #f8f9fa;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: #2c3e50;
}

.feature-card p {
  color: #666;
  line-height: 1.6;
}

footer {
  background: #2c3e50;
  color: #fff;
  text-align: center;
  padding: 30px 0;
}

footer p {
  opacity: 0.8;
}

.pwa-install {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  margin-top: 70px;
}

.pwa-install h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: #2c3e50;
}

.install-subtitle {
  text-align: center;
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.install-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 40px;
  margin-top: 40px;
}

.install-option {
  background: #fff;
  padding: 40px 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.install-option:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.install-option h3 {
  font-size: 1.8rem;
  margin-bottom: 25px;
  color: #2c3e50;
}

.install-steps {
  margin-bottom: 30px;
  text-align: left;
}

.install-steps p {
  margin-bottom: 10px;
  color: #555;
  font-size: 1rem;
  line-height: 1.5;
}

.btn-install {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border: none;
  padding: 15px 30px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: 200px;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-install:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.android-btn {
  background: linear-gradient(135deg, #4caf50 0%, #45a049 100%);
}

.android-btn:hover {
  box-shadow: 0 8px 25px rgba(76, 175, 80, 0.3);
}

.ios-btn {
  background: linear-gradient(135deg, #007aff 0%, #0056cc 100%);
}

.ios-btn:hover {
  box-shadow: 0 8px 25px rgba(0, 122, 255, 0.3);
}

@media (max-width: 768px) {
  .nav-links {
    gap: 20px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .install-buttons {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .install-option {
    padding: 30px 20px;
  }

  .install-option h3 {
    font-size: 1.5rem;
  }

  .pwa-install h2 {
    font-size: 2rem;
  }

  .install-subtitle {
    font-size: 1rem;
  }
}