@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@100;300;400;500&display=swap');
*{margin: 0; padding: 0; box-sizing: border-box}

/*colores

VERDE: #8dd1b7
AZUL: #07243c
AZUL SUB: #27445c
*/

body{
    font-family: 'Montserrat', sans-serif;
    background: #8dd1b7;
    color: aliceblue; 
    text-align:left;}

header{background: #fff; text-align: center} 

.foto { border-radius: 50%;
;}

.encabezado {display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: space-around;
	align-items: center;
	align-content: center;
    margin: 2rem 0 auto 0;
    padding: 2rem;
    min-height: 2rem;
    color: #8dd195;
}

h1 { 
    font-size: 2rem;
    color: #07243c;
    
}
h2 { 
    font-size: 1.3rem;
    text-align: left;
    color:#27445c;
}
h3{
    color:#07243c;
    text-align:left;
    margin: auto;
    text-align: center;
    font-size: 1.5rem;
    margin: 3% 0 1%;}

.menu{ 
    margin: 0.9% 0 0 0;
    padding: 1% 5%;
    font-size: 1rem;
    text-align: center;
}
.menu a{ 
    text-decoration: none;
    font-weight: 800;
    
}
a:hover {color: #fff;
background: #8dd1b7}


.item { padding: 0.5%;
        margin: 1%;
        color: #27445c;
        border: 2px solid #fff;
    border-radius: 0.6rem;
        background: #fff;
}

.materiasaprobadas {
    margin: 0% 5%;
    padding: 0% 3%;
    display: flex;
	flex-direction: row;
	flex-wrap: nowrap;
	justify-content: space-around;
	align-items: stretch;
	align-content: stretch;
    
} 

.nivel {
 background:  #07243c;
   width: 20%;
    padding: 2rem;
    min-height: 0.1rem;
    border-radius: 0.6rem;}

       
h4{
    color:whitesmoke;
    text-align:center;
    font-size: 1.3rem;
    margin: 0.2rem;}

.nivel p{
    color: aliceblue;
    text-align: center;
    font-size: 1rem;
    }


.alumnas{
    padding: 0 15%;
    display: flex;
	flex-direction: row;
	flex-wrap: nowrap;
	justify-content: space-around;
	align-items: center;
	align-content: flex-start;
}

.alumnas p{
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    color: #27445c;
    
}

.alumnas a{
    text-decoration: none;
    color: #27445c;
    font-weight: 500;
    padding: 0.1rem 0.7rem;
  }

.alumnas a:hover {
     color: #ffff;
   }


footer {margin: 2% 0 1%;
    background: #ffff;
    }
    
footer p {color: #27445c;
    font-style: italic;
    font-size: 0.7rem;
padding: 0 5%;}


 <link rel="stylesheet"type="text/css"href="css/estilos.css">