body{

font-family: Arial;

margin:0;

background:#f4f4f4;

}



header{

background:#2c3e50;

color:white;

padding:15px;

}



.navbar a{

color:white;

margin-right:15px;

text-decoration:none;

}



main{

padding:20px;

}



table{

border-collapse:collapse;

background:white;

}



td,th{

padding:8px;

border:1px solid black;

}



button{

padding:10px;

font-size:16px;

}