/* Basic Reset & Typography */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: 'Segoe UI', Arial, sans-serif;
  color: #222;
  background: #f9f9f9;
  line-height: 1.6;
}
/* Header */
header {
  background: #1e90ff;
  color: #fff;
  padding: 1rem 2rem;
  text-align: center;
}
/* Navigation */
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}
nav a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}
/* Main Content */
.hero {
  background: #fff;
  padding: 3rem 2rem;
  text-align: center;
  margin-bottom: 1.5rem;
}
.features {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin: 2rem 0;
}
.feature {
  background: #e3f0ff;
  padding: 2rem;
  border-radius: 8px;
  flex: 1 1 200px;
  text-align: center;
}

/* Footer */
footer {
  background: #1e90ff;
  color: #fff;
  padding: 1rem 2rem;
  text-align: center;
  margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 900px) {
  .features {
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 600px) {
  header, footer {
    padding: 1rem;
  }
  .hero {
    padding: 2rem 1rem;
  }
  nav ul {
    flex-direction: column;
    gap: 0.5rem;
  }
}