body { font-family: "IBM Plex Sans", "Segoe UI", sans-serif; margin: 0; background: #f4f7fa; color: #1f2937; }
header, main, footer { max-width: 820px; margin: 1rem auto; background: #fff; border: 1px solid #d1d5db; border-radius: 12px; padding: 1rem 1.2rem; }
a { color: #0f766e; text-decoration: none; margin-right: .5rem; }
p { line-height: 1.6; color: #4b5563; }