body {
  background:#f4f6f8;
  margin:0;
  font-family: Arial, sans-serif;
}

.site-container {
  max-width:900px;
  margin:30px auto;
  background:white;
  padding:20px;
  border-radius:6px;
  box-shadow:0 2px 6px rgba(0,0,0,0.08);
}

.site-header {
  border-bottom:1px solid #ddd;
  padding-bottom:10px;
  margin-bottom:20px;
}

.site-footer {
  border-top:1px solid #ddd;
  margin-top:20px;
  padding-top:10px;
  font-size:12px;
  color:#666;
}