* {
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  margin: 0;
  background: #f4f6f9;
  color: #222;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: auto;
}

.header {
  background: #0b3c5d;
  color: #fff;
  padding: 30px 0;
}

.header h1 {
  margin: 0;
}

.header nav a {
  color: #fff;
  margin-right: 15px;
  text-decoration: none;
  font-weight: bold;
}

.hero {
  background: #ffffff;
  padding: 30px;
  margin: 30px 0;
  border-radius: 6px;
}

.articles article {
  background: #fff;
  padding: 20px;
  margin-bottom: 20px;
  border-radius: 6px;
}

.btn {
  display: inline-block;
  margin-top: 10px;
  background: #0b3c5d;
  color: #fff;
  padding: 8px 14px;
  text-decoration: none;
  border-radius: 4px;
}

.footer {
  background: #0b3c5d;
  color: #fff;
  text-align: center;
  padding: 15px;
  margin-top: 40px;
}