body{font-family:Arial,Helvetica,sans-serif;max-width:900px;margin:auto;padding:40px;background:#f5f5f5;color:#333;line-height:1.7}h1{color:#2196F3}a{color:#2196F3;text-decoration:none}a:hover{text-decoration:underline}.card{background:white;padding:30px;border-radius:10px;box-shadow:0 2px 10px rgba(0,0,0,.1)}