body{
    background-image: url("https://www.solofondos.com/wp-content/uploads/2015/11/new-fondo1lateral.jpg");
}
#calculadora{
    background-image: url("https://www.solofondos.com/wp-content/uploads/2015/11/imagenes-de-fondo-para-pagina-web.jpg");
}

#contenedor-header {
     margin: 2px;
    background: rgba(0, 60, 195, 0.9);
    border-radius: 25px;
    padding : 15px;
    display : flex;
}
#header-titulos{
    font-size: x-large;
    color: whitesmoke;
    width : 100%;
    text-align: center;
}

#header-imagen{
    width: 35%;  
}

#header-imagenCalculadora{
    width: 25%;  
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 5px;
}

li {
  background:rgba(152, 156, 255, 0.91);
  color:white;
  font-size: 20px;
  border-radius: 10px;
  padding:5px;
  margin:3px;
  font-style:italic; 
}
li:hover{
    opacity: 0.4;
}

a {
    color: white;
    text-decoration: none;
    justify-content: center;
}


article{
    
    display: flex;
    justify-content:center;
    margin : 2px;
    border-radius: 15px;
    padding: 15px;
}


article div {
    width: 400px;
    background: rgba(255, 0, 0, 0.96);
    padding: 20px;
    border-radius: 15px;
}

article div p {
    background: #d3eefa;
    border-radius: 20px;
    font-weight: 300;
    padding :15px;
    font-size: 20px;
    font-style: italic;
    color : black;
    text-align: center;
}
article div h1 {
    color: aliceblue;
    font-size: xx-large; 
}
article div h3 {
    color: aliceblue;
    font-size: x-large; 
}
article  img {
    margin : 15px;
}
article  img:hover {
    opacity: 0.2;
}
footer{
    background : rgba(213, 253, 255, 0.9);
    border-radius: 20px;
    padding : 2px;
    display : flex;
}

.footer-p{
    color : black;
    font-weight: bolder;
    font-size: 20px;
    width : 50%;
    font-style: oblique;
    text-align: center;
}

#contenedorPrincipal{
    display:flex;
}

section {
  width: 75%;  
}

aside{
    width: 20%;
    padding:5px;
    border-radius: 20px;
}
aside h{
    
}

aside p{
    background: #d3eefa;
    border-radius: 20px;
    font-weight: 300;
    padding :15px;
    font-size: 20px;
    font-style: italic;
    color : rgba(59, 114, 160, 0.96);
    text-align: center;
}