body {background-color:antiquewhite; 
    font-family: Verdana, Geneva, Tahoma, sans-serif; 
    margin: 5% ;
    background-image: url("https://img.freepik.com/vector-gratis/vector-onda-azul-transparente_1055-7084.jpg?semt=ais_hybrid&w=740&q=80");
}


header {background-color:rgba(134, 161, 185, 0.142); 
    color:black; 
    text-align: justify; 
    padding: 5%;
    text-transform: uppercase;
}


h2 {color:blueviolet; 
    border-bottom: 5%; 
    padding-bottom:5%;}


section {margin: auto; 
    padding: 5%; 
    border-radius: 10%; 
    box-shadow: 10px 12px 14px 2px rgba(0,0,0,0.47); }


table {border-collapse: separate ; 
    width:auto;}


th {border: 7%; 
    padding: 1%; 
    text-align:center;}


td {border: 7%; 
    padding: 1%; 
    text-align:center; }


button {background-color: chartreuse; 
    color: cornflowerblue; 
    border-radius: 15%; 
    cursor: auto; :hover;}