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

/*Estilos generales */

body{background: #57aca1; font-family: serif;}
header{background: #57aca1; font-family: serif;}

main section article {background: darkseagreen; padding: 1rem}
main section aside {background: #66cbbf; padding: 1rem}


h1 {color: #7dfdd2;}
h2 {color:aquamarine}
footer{background:#7bada7 }
footer p{font-size: 0.5rem;}


.inicio {display: flex; justify-content: space-between;}

.Integrantes{background: #7bada7; width: 30%; margin; 5%; padding: 5%; min-height: 8rem; border-radius: 1rem;}
.Descripcion{background: #7bada7; width:30%; margin; 5%; padding: 5%; min-height: 8rem; border-radius: 1rem;}
.Columna-3{background: #7bada7; width: 30%; margin; 5%; padding: 5%; min-height: 8rem; border-radius: 1rem;}

header h2{color: #7dfdd2; text-align: center;}

/* Menu */
nav {background: #7bada7; padding: 0.7rem; margin: 0.5rem; text-align: center}
nav ul li{display: inline-block;}
nav ul li a {color: #7dfdd2; text-decoration:none; padding: 1rem}
.link-activo {background: gray;}
.alumno {text-align: center;}
.materias {display: flex; justify-content: space-around;}
.año-1 {background: #7bada7; width: 30%; margin; 5%; padding: 5%; min-height: 8rem; border-radius: 1rem; text-align: left;}
.año-1 h2 {text-align: left;}
.año-2 {background: #7bada7; width: 30%; margin; 5%; padding: 5%; min-height: 8rem; border-radius: 1rem; text-align: left;}
.año-2 h2{text-align: left;}
.año-3 {background: #7bada7; width: 30%; margin; 5%; padding: 5%; min-height: 8rem; border-radius: 1rem; text-align: left;}
.año-3 h2{text-align: left;}