*{  
    padding: 0px;
    margin: 0px;
    box-sizing: border-box;
}
body{   
    background-color: rgb(20, 127, 250);
    font-size: 20px;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
}
header h1{  
    color: white;
    text-align: center;
    margin-top: 50px;

}

section{
    width: 400px;
    background-color: white;
    border-radius: 10px;
    margin: auto;
    padding: 15px;
    box-shadow: 3px 3px 10px rgba(0, 0, 0, 0.486);
}

section div{    
    padding: 10px;
}
p#sexo{ 
    margin-top: 20px;
}

input[type='number']{   
    width: 100px;
    border-radius: 5px;
    
}

input[type='button']{  
    
    width: 100px;
    font-weight:800 ;
    border-radius: 5px;
    cursor: pointer;
}

div#btn{   
   
}

div#res{    
    text-align: center;
}


footer{ 
    color: white;
    font-style: italic;
    text-align: center;
}

@media screen and (min-width: 768px) {
    section{    
        width: 500px;
    }
    
}