*{
    font-family: 'Roboto', sans-serif;
}

html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main{
    flex: 1;
}

main.main-info{
    width: 1400px;
    margin: 0 auto;
}

.main-content{
    width: 100%;
    margin: 0 auto;
    padding: 20px;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 1)),
        url('../img/background.jpg');
    background-position: center;
    background-size: cover;
}
.main-content h1{
    text-align: center;
    padding: 0.5rem 0;
}
.main-content p{
    text-align: center;
    padding: 0 1rem;
}
.main-content-cta{
    display: flex;
    justify-content: center;
    gap: 1rem;
    padding: 1rem 0;
}

a.cta-button{
    border-radius: 10%;
    border: #000 1px solid;
    background-color: #000;
    color: #fff;
    padding: 0.2rem 0.5rem;
    text-decoration: none;
}

section.main-how-works{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

section.how-works-steps{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 1rem;
}

section.step{
    padding: 1rem;
    margin: 1rem;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    border: #000 4px solid;
}
.step h3{
    text-align: center;
    color: red;
}
.step p{
    text-align: center;
}

.main-featured-personal{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.main-listado-personal{
    display: grid;
    justify-content: center;
    grid-template-columns: repeat(3, 1fr);
}

.main-personal-card,
.main-listado-personal .personal-card{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    margin: 1rem;
    border: #000 2px solid;
    width: 300px;
    border-radius: 10%;
}
.main-personal-card img,
.main-listado-personal .personal-card img{
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background-color: #000;
}

.main-listado-personal .personal-tags{
    display: flex;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 0;
}
.main-listado-personal .personal-card p{
    margin: 0.3rem 0;
    text-align: center;
}

.main-asignaturas-list{
    display: grid;
    justify-content: center;
    grid-template-columns: repeat(4, 2fr);
}
.main-asignaturas-card{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    margin: 1rem;
    border: #000 2px solid;
    width: 300px;
    border-radius: 10%;
}
.main-asignaturas h2{
    text-align: center;
}

section.main-comparativa{
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
}
table.tabla-comparativa{
    border-collapse: collapse;
    width: 100%;
    max-width: 900px;
}
.tabla-comparativa caption{
    padding: 0.5rem;
    font-style: italic;
}
.tabla-comparativa th,
.tabla-comparativa td{
    border: #000 1px solid;
    padding: 0.5rem 1rem;
    text-align: center;
}
.tabla-comparativa thead th{
    background-color: #000;
    color: #fff;
}
.tabla-comparativa tbody th{
    text-align: left;
    background-color: #f4f4f4;
}