* {
    box-sizing: border-box;
}

body {
    margin: 0px;
    padding: 0px;
}

header {
    height: 4em;
    text-align: center;
    align-items: center;
    background-color: brown;


}



header form {
    padding-top: 1em;
    background-color: brown;
}

header form select,
input {
    border-radius: 5px;
    font-size: 1.3em;
}

main {
    width: 100%;
    padding: 2em;
}

main form {
    width: 100%;
    display: grid;
    grid-template-columns: auto auto auto;
}

#botones {
    padding-top: 1em;
    
    height: 4em;
    text-align: center;
    align-items: center;
    background-color: brown;
}

#botones button{

    border-radius: 5px;
    font-size: 1.3em;
}

#botones a{
    text-decoration: none;
    color: black;
}


main input[type="submit"] {
    border-radius: 5px;
    font-size: 1.3em;
}




main li {
    list-style: none;
}

.division {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 0.5em;
    width: 10em;
    margin: 2em;

}

.division input {
    width: 80%;
    padding: 1px;
}

.operadores {
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: auto;
    border-bottom: 3px solid black;
}

.operadores div:nth-of-type(1) {
    border-right: 3px solid black;
}

.operadores div:nth-of-type(2) {
    padding-left: 3px;

}

.cocienteResto {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5em;
}