body { font-family: system-ui, sans-serif; margin: 0; padding: 0; background: #f8f9fa; color: #212529; }
header { background: #2c3e50; color: #fff; padding: 1rem 2rem; display: flex; justify-content: space-between; }
header a { color: #fff; text-decoration: none; margin-left: 1rem; }
main { max-width: 800px; margin: 2rem auto; padding: 0 1rem; }
article { background: #fff; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
time { color: #6c757d; font-size: 0.85rem; }
footer { text-align: center; padding: 2rem; color: #6c757d; margin-top: 2rem; }