* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f5f7fa;
  color: #1f2937;
}

.site-header {
  background: #0f172a;
  color: #fff;
  padding: 32px 0;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-title {
  margin: 0;
  font-size: 2rem;
}

.site-description {
  margin-top: 8px;
  opacity: 0.9;
}

main.container {
  padding-top: 32px;
  padding-bottom: 32px;
}

h1, h2, h3 {
  line-height: 1.2;
}