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

    font-family: 'Open Sans' ,Arial, sans-serif;
}

body{
    background-color: #061e4e;
}

a{
    text-decoration: unset;
}

.container{
    min-height: 80vh;
    max-width: 800px;
    width: 100%;
    padding: 60px 50px;
    margin: 0 auto;
    background-color: white;
}

.button{
    transition: 0.3s;
    padding: 14px;
    margin: 5px auto;
    background-color: #0000007f;
    color: white;
    font-size: 18px;
    text-transform: uppercase;
    text-align: center;
    border-radius: 10px;
}
.button:hover{
    background-color: #0000009f;
}

.button.voltar{
    margin-top: 25px;
    width: 400px;
    max-width: 80%;
    background-color: rgba(250, 250, 250, 0.7);
    color: #061e4e;
}
.button span{
    vertical-align: bottom;
    color: #061e4e;
}

form{
    width: 100%;
    padding: 10px 0px 40px;
}

form h2{
    margin-bottom: 20px;
    text-align: center;
    text-transform: uppercase;
    font-weight: 300;
    font-size: 1.8em;
}
form img.formula{
    width: 100%;
    max-width: 300px;
    margin: 5px auto 20px;
    display: block;
    border: 1px solid #333;
}
form .input-box{
    margin-bottom: 10px;
}
form .input-box *{
    display: block;
}
form .input-box input[type="number"]{
    width: 100%;
    height: 40px;
    line-height: 40px;
    text-align: center;
}

form .input-box input[type="submit"]{
    transition: 0.3s;
    text-align: center;
    display: block;
    margin: 30px auto 10px;
    padding: 10px 80px;
    background-color: rgb(0, 0, 0);
    color: white;
    border: 0;
}
form .input-box input[type="submit"]:hover{
    background-color: #333;
}

.resultado{
    width: 100%;
    padding: 10px 20px;
    border: 1px solid #333;
    text-align: center;
}
.resultado h2{
    text-transform: uppercase;
    padding-bottom: 5px;
}
.resultado p.valor-resultado{
    font-size: 2.5em;
    color: rgb(7, 133, 11);
    max-width: 100%;
}



@media screen and (max-width: 768px) {
    body{
        background-color: rgba(6, 30, 78, 0.9);
    }
}