body{font-family:Arial, sans-serif;margin:0;padding:0;background:#f4f4f4;}header{background-color:#333;color:white;padding:20px 0;text-align:center;}nav a{color:white;margin:0 15px;text-decoration:none;}section{padding:20px;}.software-list{display:flex;flex-wrap:wrap;gap:20px;}.software-item{background-color:white;padding:15px;border-radius:8px;width:250px;box-shadow:0 0 10px rgba(0,0,0,0.1);}footer{background-color:#222;color:white;text-align:center;padding:15px 0;}