body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: #333;
  line-height: 1.6;
}

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

.site-header {
  background: #1b3a57;
  padding: 20px 0;
}

.brand {
  color: #ffffff;
  margin: 0;
  font-size: 28px;
  font-weight: bold;
}

.nav a {
  margin-left: 20px;
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
}

.nav a:hover {
  text-decoration: underline;
}

.hero {
  text-align: center;
  padding: 80px 0;
  background: #eef3f7;
  border-bottom: 1px solid #d6dce1;
}

.hero h2 {
  margin-bottom: 10px;
  font-size: 32px;
}

.btn {
  display: inline-block;
  margin-top: 15px;
  padding: 12px 20px;
  background: #1b3a57;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
}

.btn:hover {
  background: #143040;
}

.features {
  display: flex;
  justify-content: space-between;
  padding: 60px 0;
  gap: 30px;
}

.features article {
  flex: 1;
  background: #fff;
  padding: 25px;
  border: 1px solid #dce3e8;
  border-radius: 6px;
}

.about {
  padding: 60px 0;
  text-align: center;
}

.site-footer {
  text-align: center;
  padding: 25px 0;
  margin-top: 40px;
  border-top: 1px solid #dce3e8;
  font-size: 14px;
}