html,body{
    width: 100%;
    height: 100%;
    margin: 0;
    color: #ffffff;
    background-color: black;
}
header{
    width: 100%;
    text-align: center;
    color: #000000;
    background-color: #ffffff;
}
header h1{
    margin: 0;
}
header a{
    color: #000000;
}
.main{
    text-align: center;
    max-width: 60%;
    color: #000000;
    background-color: #ffffff;
    border-radius: 8px;
    margin: 0 auto;
}
table{
    margin: 0 auto;
    border-collapse: collapse;
    
}