:root { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
body { margin: 0; background: #fafafa; color: #111; }
.container { max-width: 720px; margin: 72px auto; padding: 0 16px; }
h1 { font-size: 2rem; margin-bottom: 0.5rem; }
p { line-height: 1.7; }
a.btn { display: inline-block; margin: 6px 0; padding: 10px 14px; border-radius: 8px; text-decoration: none; background: #111; color: #fff; }
a.btn:hover { opacity: .9; }