body {                                                                                                                                              
     font-family: system-ui, sans-serif;                                                                                                               
     margin: 3rem;                                                                                                                                     
     background: #f8fafc;                                                                                                                              
     color: #0f172a;                                                                                                                                   
   }                                                                                                                                                   
                                                                                                                                                       
   main {                                                                                                                                              
     max-width: 720px;                                                                                                                                 
     margin: 0 auto;                                                                                                                                   
     padding: 2rem;                                                                                                                                    
     background: white;                                                                                                                                
     border: 1px solid #e2e8f0;                                                                                                                        
     border-radius: 16px;                                                                                                                              
   }                                                                                                                                                   
                                                                                                                                                       
   a {                                                                                                                                                 
     color: #2563eb;                                                                                                                                   
   }