body { font-family: Arial, sans-serif; background: #f2f5f7; margin: 0; padding: 40px 16px; color: #222; }
.card { max-width: 640px; margin: 0 auto; background: #fff; padding: 32px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,.08); }
h1 { margin-top: 0; }
.btn { display: inline-block; background: #0b7a3e; color: #fff; padding: 10px 16px; border-radius: 8px; text-decoration: none; margin-right: 8px; }
.btn.secondary { background: #155e9c; }
.note { color: #666; font-size: 14px; }
code { background: #eee; padding: 2px 5px; border-radius: 4px; }