body { font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.6; margin: 0; background: #f7f7f5; color: #222; }
main { max-width: 860px; margin: 0 auto; padding: 3rem 1.5rem; }
h1 { font-size: 2.4rem; margin-bottom: 0.5rem; }
nav { display: grid; gap: 0.75rem; margin-top: 2rem; }
nav a { background: white; border: 1px solid #ddd; padding: 0.8rem 1rem; border-radius: 8px; text-decoration: none; color: #123; }
.notice { background: #fff7d6; border: 1px solid #e4c766; padding: 1rem; border-radius: 8px; margin: 1.5rem 0; }
pre { background: #111; color: #eee; padding: 1rem; overflow-x: auto; border-radius: 8px; }
a { color: #0645ad; }