body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
}
header {
  background: #4CAF50;
  color: #fff;
  padding: 10px 0;
}
header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  margin: 0 auto;
}
header nav a {
  color: #fff;
  margin: 0 10px;
  text-decoration: none;
}
header nav a.active {
  text-decoration: underline;
}
.hero {
  background: #f5f5f5;
  padding: 50px 0;
  text-align: center;
}
.hero .btn {
  background: #4CAF50;
  color: #fff;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
}
.features, .blog-preview {
  padding: 20px 0;
}
.features .feature-list, .blog-list {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.feature, .blog-post {
  width: 30%;
  margin: 10px;
}
footer {
  background: #333;
  color: #fff;
  text-align: center;
  padding: 10px 0;
}
footer a {
  color: #ccc;
  text-decoration: none;
}