* {
    box-sizing: border-box;
    font-family: 'Raleway', sans-serif;
}

h1 {
    font-size: 2em;
}

h2 {
    font-size: 1.5em;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    min-height: 100vh;
    background-color: #ffd7bd;
    color: #1A3254;
}

header {
    margin: 0;
    padding: .2em 1em;
    background-color: #ee701d;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    position: fixed;
}

header img {
    height: 2.8em;
}

header nav {
    display: block;
}

header ul {
    list-style-type: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header ul li {
    padding: .5em 1em;
}

header ul li:not(:last-child){
    border-right: .2em solid white;
}

header a {
    text-decoration: none;
    color: white;
    font-weight: bold;
}

main {
    margin: 0em 1em;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 80vh;
}

main h1 {
    margin: .5em;
    margin-top: 3em;
}

main #maria {
    display: flex;
    flex-direction: column;
    align-items: center;
}

main #maria img {
    border-radius: 50%;
    border: solid 0.2em;
    border-color: #1A3254;
    width: 50%;
    max-width: 30vh
}

main #maria h2 {
    margin-bottom: 0;
}

main #maria div {
    padding: 1em;
    margin: 1em;
    width: 100%;
    background-color: #ffb17d;
    border-radius: 1.2em;
    display: flex;
    flex-direction: column;
    align-items: center;
}

main #integrantes {
    display:flex;
    flex-direction: column;
    align-items: center;
    background-color: #ffc6a1;
    border-radius: 1em;
    margin: 1em 2em;
}

main ul {
    list-style-type: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1em;
    margin: 0;
}


main #integrantes ul li {
    margin: .5em;
}

main #integrantes a {
    text-decoration: none;
    background-color: #ee701d;
    color: white;
    border-radius: .4em;
    padding: .4em;
}

main #datos-academicos {
    margin: 1em;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: black;
}

main #datos-academicos div {
    background-color: #ffc6a1;
    box-shadow: .2em .2em rgba(163, 79, 22, 0.41);
    border-top-left-radius: 1em;
    border-top-right-radius: 1em;
    margin: 1em;
    width: 100%;
    max-width: 30em;
    display: flex;
    flex-direction: column;
    align-items: center;
}

main #datos-academicos img {
    width: 35vw;
    max-width: 9em;
}

footer {
    padding: 1.25em 2.5em;
    background-color: #ee701d;
    color: white;
}




<!---mediaqueries--->


@media (min-width:80em) {
    #maria {
        display: flex;
        
    }
}


<!---Mapa--->

main {
    
}

#mapa a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    padding: 1em;
}

#mapa #integrantes img {
   height: 8em;
    border: .1em solid #ee701d;
    border-radius: 50%;
    box-shadow: .1em .1em .2em #a98763;
}

#mapa #integrantes ul {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

#mapa #integrantes ul a {
    background-color: rgba(238, 112, 29, 0);
    color: none;
    border-radius: 0;
    padding: 0;
}

.propuesta {
    padding: 0;
    margin: 1em;
}

.propuesta img {
    width: 100%;
    height: auto;
}



<!---Plan--->

main {
    
}


#plan a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    padding: 1em;
}

#plan #integrantes img {
   height: 8em;
    border: .1em solid #ee701d;
    border-radius: 50%;
    box-shadow: .1em .1em .2em #a98763;
}

#plan #integrantes ul {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

#plan #integrantes ul a {
    background-color: rgba(238, 112, 29, 0);
    color: none;
    border-radius: 0;
    padding: 0;
}

.propuesta-grafica {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0;
    margin: 1em;
}

.propuesta-grafica div {
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.propuesta-grafica img {
    max-width: 80%;
    height: auto;
    margin: 1em 0em;
}