.titulo{
    background: pink;
    color: yellow;
    text-align: center;
    padding: 14px;
    font-size: 40px;
    border-radius: 30px;
}



.boton{
    font-style: italic;
    color: black;
    background: #bfffff;
    font-size: 30px;
    border-radius: 15px;
    margin: 15px;
    
}
label{
    font-size: 25px;
    font-style:normal;
    color: white;
}


input{
    font-size: 20px;
}

.principal{
 background-image:url("https://png.pngtree.com/thumb_back/fw800/background/20200703/pngtree-hand-drawn-math-education-calculator-ruler-background-image_340650.jpg");
 text-align: center;
    font-family:sans-serif;
    
}


.contenedor{
background: grey;
padding: 30px;
border-radius: 30px;
border: 5px white solid;
width: 400px;
display: inline-block;

}
p{
    color:darkgreen;
  font-size: 20px;
  font-family: Courier;
    font-weight: bold;
    font-style: italic;
    line-height: 30px;
    letter-spacing: 5px;
    text-decoration: underline;
    text-transform: capitalize;
    text-align: left;
    text-indent: 30px;
    display: inline-block;
}