body{
  font-family: "Helvetica Neue", Arial, sans-serif;
  direction: rtl;
  padding: 24px;
  max-width: 900px;
  margin: 0 auto;
  line-height: 1.6;
}
header h1{ margin: 0 0 8px 0; }
nav a{ color: #0366d6; text-decoration: none; margin: 0 6px; }
main{ margin-top: 16px; }
footer{ margin-top: 28px; color: #666; font-size: 0.9rem; }