se quiser borda na sua tabela, descomente 
table, td {
    border: 4px solid black;
}


.destaque {
    background-color: yellow;
}

body
{
    background-image: url("../../img/final.jpg");
    background-repeat: no repeat;
    background-position: center center;
    background-size: cover;
    color: black;
    border: 1px solid blue;

}

table {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 20px;
    text-align: justify;
    color: white;

} 
h1 {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 20px;
    text-align: justify;
    color: white;

} 
button  {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 20px;
    text-align: justify;
    color: red;

} 
form {
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 20px;
    text-align: justify;
    color: red;

} 

img {
    border: 1px solid blue;
}