*{
    padding: 0;
    margin: 0;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

.contenedor{
    display: grid;
    repeat(auto-fit, minmax(valor_min, 1fr));
    repeat(auto-fill, minmax(min_ancho, 1fr));
    flex-direction: column;
    background-image: url(../essets/img/background_3.jpg);
}

.flex-header{
    display: grid;
    grid-template-columns: 1fr 5fr;
    grid-template-areas: "logo titulo" 
                        "logo nav";     
    background: linear-gradient(180deg,rgba(195, 240, 250, 1) 0%, rgba(237, 221, 83, 0) 65%);
}

.flex-header .logo{
    grid-area: logo;
    width: 30px;
}
.flex-header .logo .logo-ifdc{
    position: absolute;
    top: -10px;
    left:10px;
    padding: 10px;
    width: 210px;
    filter: drop-shadow(9px 4px 7px rgb(11, 15, 77))
}

.cabecera{
    grid-area: titulo;
    display: flex;
    align-items: flex-end;
    flex-direction: column;
    text-align: right;
    margin-top: 15px;
    margin-right: 70px;
    filter: drop-shadow(0px 0px 2px rgb(225, 225, 225))
}

.nav{
    grid-area: nav;
}

.flex-header .nav{
    display: flex;
    list-style: none;
    padding: 10px;
    flex-direction: row;
    justify-content: space-around;
}

.flex-header .nav .nav-hijo{
    width: 100%;
    text-align: center;
}

.flex-header .nav li a{
    display: block;
    text-decoration: none;
    color: black;
    padding: 5px;
}

.flex-header .nav li{
    border:1px solid transparent; 
}

.flex-header .nav li:hover{
    text-decoration: none;
    background-color:rgba(223, 242, 247, 0.7); 
    border:1px solid rgba(63, 66, 66, 0.7); 
}

.flex-header .nav li a:hover{
        filter: drop-shadow(0px 0px 2px rgb(240, 235, 235));
}

.grid-main{
    margin: 0 15px 0 15px;
    height: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    background-color:rgba(223, 242, 247, 0.5);    
    border:rgba(160, 169, 172, 0.8) 1px solid;
}

.section{
    display: flex;
    padding: 10px;
}

.principal{
    align-items: center;
    
}
.principal img{
    margin-left: 20px;
    margin-right: 10px;
    width: 400px;
    padding: 5px;
    border: 1px solid white;
    filter: drop-shadow(0px 0px 2px rgb(26, 25, 25));
    
}

.principal article{
    margin-top: 70px;
    margin-left: 20px;
    color: rgb(110, 107, 107);
}

.principal article h2{
    text-align: center;
    border-bottom: 2px solid rgb(110, 107, 107);
}

.principal article p{
    font-size: 15px;
    padding: 10px;
    line-height: 2;
    text-align: center;

}
.secundaria{
    display: flex;
    margin-top:5px ;
    gap:10px;
}

.profesor{
    padding: 10px;
    width: 120px;
    height: 120px;
    border: 1px solid black;
}