*{
box-sizing: border-box;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

:root{
    --color-textos: #000;
    --color-fondo: #f2f2f2;
    --color-1: #d7df23;
    --color-2: #333333;
    --color-3: #63635c;
    --color-5: #50b8b1;
    --color-6: #9283be;
    --textos-cuerpo: serif;
    --textos-titulos: sans-serif;
}

img {
    max-width: 100%;
}
body {
    width: min( 100rem, 100%);
    margin-inline: auto;
    margin-block-start: 0%;
    margin-block-end: 0%;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    background-color: var(--color-fondo);
}
a {
    text-decoration: none;
    color: var(--color-5);
    font-family: var(--tipo-titulos);
    font-weight: bold;
}
p {
    margin-block-end: 1em;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;;
    color: var(--color-textos);
}
header, footer {
    background-color: var(--color-1);
    margin-inline: 0%;
}
ul,
ol {
    list-style: none;
    padding: 0;
}
header .lista{
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header .contenedora{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1em;
}
header img{
    width: 20%;
    height: auto;
    margin: 1em;
}
header, footer {
    background-color: var(--color-1);
    margin-inline: 0%;
}

.intro{
    display: flex;
    flex-wrap: wrap;
    flex-direction: row-reverse;
    justify-content: space-evenly;
    align-items: center;
}
#foto_casiana{
    width: 200px;
    height: auto;
    border-radius: 40%;
    margin-block-start: 2em;
} 
h1, h2{
    color: var(--color-textos);
}
header nav a {
    color: var(--color-fondos1);
    background-color: var(--color-4);
    display: block;
    width: max-content;
    margin: .125rem;
    padding-block: .25em;
    padding-inline: 1em;
    border-radius: 0.25em;
}
header nav a:hover {
    background-color: var(--color-1);
    color: var(--color-6);
}
.header nav,
.header nav ul {
        display: contents;
        background-color: var(--color-1);
}
header .contenedora{
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1em;
}
.boceto h1{
    text-align: center;
}
.volver h2{
    text-align: center;
}

/*escritorio*/
@media screen and (min-width:768px) {
    .header nav,
    .header nav ul {
            display: contents;
    }
    .header nav ul li:first-of-type{
            margin-inline-start: auto;
    }
    
    }