body{font-family:Arial;background:#f4f6f9;margin:0}nav{background:#17365d;padding:20px}nav a{color:white;margin:15px;text-decoration:none}main{padding:30px}.card{background:white;padding:25px;border-radius:15px;box-shadow:0 3px 10px #ccc;margin:15px}.cards{display:flex;gap:15px}.login{height:100vh;display:flex;align-items:center;justify-content:center}input,button{display:block;padding:12px;margin:10px;width:250px}button{background:#17365d;color:white;border:0}