body {
  margin: 0;
  padding: 0;
  font-family: 'Open Sans', sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.7;
}

header {
  text-align: center;
  padding: 60px 20px 40px;
  background: #fff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  margin-bottom: 30px;
}

header h1 {
  margin: 0;
  font-size: 2.4em;
  font-weight: 700;
}

header h2 {
  margin-top: 8px;
  font-size: 1em;
  font-weight: normal;
  color: #666;
}

main {
  max-width: 800px;
  margin: auto;
  padding: 20px;
  background: #fff;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
  border-radius: 4px;
}

article + article {
  margin-top: 40px;
}

h3 {
  font-size: 1.6em;
  margin-bottom: 10px;
}

a {
  color: #0066cc;
  text-decoration: none;
  border-bottom: 1px solid #0066cc;
}

a:hover {
  border-color: transparent;
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

th, td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

th {
  background: #f0f0f0;
}