* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background-color: #f4f4f4;
  color: #333;
}

.container {
  max-width: 1000px;
  margin: auto;
  padding: 0 20px;
}

header {
  background-color: #333;
  color: #fff;
  padding: 20px 0;
}

header h1 {
  margin: 0;
}

header nav {
  margin-top: 10px;
}

header nav a {
  color: #fff;
  margin-right: 15px;
  text-decoration: none;
}

main {
  display: flex;
  flex-wrap: wrap;
  margin-top: 20px;
}

.content {
  flex: 3;
  padding-right: 20px;
}

.sidebar {
  flex: 1;
  background-color: #fff;
  padding: 20px;
  margin-top: 20px;
}

.post {
  background-color: #fff;
  margin-bottom: 20px;
  padding: 20px;
  border-left: 5px solid #0077cc;
}

.post h2 {
  margin-bottom: 10px;
}

.post .date {
  font-size: 0.9em;
  color: #777;
  margin-bottom: 10px;
}

.post a {
  color: #0077cc;
  text-decoration: none;
}

footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 20px 0;
  margin-top: 40px;
}

@media (max-width: 768px) {
  main {
    flex-direction: column;
  }

  .content {
    padding-right: 0;
  }
}
