*{
    padding: 0;
    box-sizing: border-box;
}

body{
    background: #3e3e3e;
    padding: 10px;
}
body header{
    width: 100%;
    border: 1px solid white;
}
body main{
    width: 100%;
    height: 100%;
    border: 1px solid red;
    padding: 10px;
}



main #tabua{
    border: 1px solid white;
    color: #C9B037;
    width: 15%;
    height: 50%;
}

#tabua ul{
    border: 1px solid red;
    list-style: none;
    width: 100%;
    height: 10%;
    text-align: center;
}
#tabua ul li{
    margin: 15px;
    
}

#tabua a{
    background-color: #3e3e3e;
    color: #C9B037;
}