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


html {font-size: 16px;
    
    text-decoration: none; 
    list-style-type: none; 
    }

body {
    background-color: #ffffff;
    font-family: 'Josefin Sans', sans-serif;
    }

header {
    
    background-image: url(icons-blue.jpg);
    background-color: aliceblue;
}

nav {
    text-align: center;
    margin: 1rem;}

nav ul li {
    text-decoration: none; 
    list-style-type: none; 
    display: inline;
    background-color: #452dc7;
    color: #ffffff;
    margin-right: 2rem; 
    padding: 0.5rem 1rem; 
    font-family: arial, sans-serif; 
    border-radius:0.2rem;
    box-sizing: border-box;
    width: 10rem;
}

a {color: #ffffff;}
a:visited {
color: #ffffff;
}

h1 {
    margin: auto;
    background-color: #452dc7;
    padding: 1rem;
    border-radius:0.2rem;
    font-size: 2rem;
    font-weight: 700;
    color:#ffffff;
    text-align: center;
    align-content: stretch;
    width: 42rem;
    display: block;
}


h2 {color:#000000;
    padding:1rem;
    text-align: center;
    margin-top: 1rem;
}


h3 {
	background-color: #000000;
	font-size: 0.8rem;
    color:azure;
	padding: 0.5rem;
    text-align: center;
    }

article h3 {
	background-color: #edc932;
	font-size: 1.5rem;
    color:azure;
	padding: 1rem;
    border-radius:0.2rem;
    text-align: center;
    box-sizing: border-box;
    width: 15rem;
    
    }

img {
display:block;
margin:auto;
}
        
.columnas { display: flex; 
            justify-content:center;
            margin: 0 rem, 2rem;
            font-size: 0.8rem;
            color: grey;
    
}

ul {font-size: 1.2rem;
    color:#a37f69;
    text-align: center;
    padding: 1.5rem;
    
}

li {font-family: "Roboto Condensed",sans-serif;
    font-weight: 300;
    font-size: 1rem;
    text-align: center;
    list-style-type: none;
    line-height: 2rem;
    }

body a {padding: 1rem;
text-align: center;
text-decoration: none;    
}



.atras {
    margin: 2rem 40%;
    text-align: center;
    padding: 1rem;
    background-color: #edc932;
}


footer {background-color: black;
color:azure;
font-family: "Roboto Condensed",sans-serif;  
text-align: center;
padding: 0.7rem;
line-height: 1.1rem;
display: block;    
}

footer p  {font-size: 0.8rem;
            font-weight: 200;
}

footer a {text-decoration: none; 
            color:#ffffff;
}


@media (max-width:900px)
{ .columnas {display: inline;}
    article h3 {width: auto;
        min-width: 14rem;
    margin: 3rem;}
    h1 {width: auto;
        min-width: 18rem;
    margin: 0 5rem;}
     }

}