:root {
    --fuente-heading: 'PT Sans', sans-serif;
    --fuente-parrafos: 'Open Sans', sans-serif;

    --primario: #784d3c;
    --blanco: #fff;
    --gris: #e1e1e1;
    --negro: #000;
}

html {
    box-sizing: border-box;
    font-size: 62.5%; /* ! 1rem = 10px */
}

*,*:before, *:after {
    box-sizing: inherit;
}

body {
    font-family: var(--fuente-parrafos);
    font-size: 1.6rem;
    line-height: 2;
}

/** Globales **/
.contenedor {
    width: min(90%, 120rem);
    margin: 0 auto;
}

a {
    text-decoration: none;
}

h1, h2, h3, h4 {
    font-family: var(--fuente-heading);
    line-height: 1.2;
}

h1 {
    font-size: 4.8rem;
}

h2 {
    font-size: 4rem;
}

h3 {
    font-size: 3.2rem;
}

h4 {
    font-size: 2.8rem;
}

img {
    max-width: 100%;
}

.btn {
    display: block;
    font-family: var(--fuente-heading);
    color: var(--blanco);
    text-align: center;
    padding: 1rem 3rem;
    font-size: 1.8rem;
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 2rem;
    border: none;
}

.btn:hover{
    cursor: pointer;
}

@media (min-width: 768px) {
    .btn {
        display: inline-block;
    }
}

.btn-primario {
    background-color: var(--negro);
}

.btn-secundario {
    background-color: var(--primario);
}

/** Utilidades **/
.no-margin {
    margin: 0;
}

.no-padding {
    padding: 0;
}

.centrar-texto {
    text-align: center;
}

/** Header **/
.header {
    background-image: url(../img/banner.webp);
    height: 60rem;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}

.header_texto {
    text-align: center;
    color: var(--blanco);
    margin-top: 5rem;
}

@media (min-width: 768px) {
    .header_texto {
        margin-top: 15rem;
    }
}

/** Barra **/
.barra {
    padding-top: 4rem;
}

@media (min-width: 768px) {
    .barra {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
}

/** Logo **/
.logo {
    color: var(--blanco);
}

.logo_nombre {
    font-weight: 400;
}

.logo_bold {
    font-weight: 700;
}

/** Navegacion **/
@media (min-width: 768px) {
    .navegacion {
        display: flex;
        gap: 2rem;
    }
}

.navegacion_enlace {
    display: block;
    text-align: center;
    font-size: 1.8rem;
    color: var(--blanco);
}

/** Contenido principal **/
@media (min-width: 768px) {
    .contenido_principal {
        display: grid;
        grid-template-columns: 2fr 1fr;
        column-gap: 4rem;
    }
}

/** Entrada **/
.entrada {
    border-bottom: 1px solid var(--gris);
    margin-bottom: 2rem;
}

.entrada:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
}

/** Sidebar **/
.cursos {
    list-style: none;
}

.widget-curso {
    border-bottom: 1px solid var(--gris);
    margin-bottom: 2rem;
}

.widget-curso:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
}

.widget-curso_label,
.widget-curso_info {
    font-size: 2rem;
}

.widget-curso_label {
    font-family: var(--fuente-heading);
    font-weight: 700;
}

.widget-curso_info {
    font-weight: 400;
}

/** Footer **/
.footer {
    background-color: var(--negro);
    padding-bottom: 3rem;
    margin-top: 4rem;
}

/** Sobre nosotros **/
@media (min-width: 768px) {
    /* Todo: Forma anterior
    .sobre-nosotros {
        display: flex;
        justify-content: space-between;
    }

    .sobre-nosotros_img,
    .sobre-nosotros_texto {
        flex: 0 0 calc(50% - 1rem);
    }
    */

    .sobre-nosotros {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        column-gap: 2rem;
    }
}

/** Cursos **/
.curso {
    padding: 3rem 0;
    border-bottom: 1px solid var(--gris);
}

@media (min-width: 768px) {
    .curso {
        display: grid;
        grid-template-columns: 1fr 2fr;
        column-gap: 2rem;
    }
}

.curso:last-of-type {
    border-bottom: none;
}

.curso_label,
.curso_info {
    font-size: 2rem;
}

.curso_label {
    font-family: var(--fuente-heading);
    font-weight: 700;
}

.curso_info {
    font-weight: 400;
}

/** Contacto **/
.contacto-bg {
    background-image: url(../img/contacto.jpg);
    height: 40rem;
    background-repeat: no-repeat;
    background-size: cover;
}

.formulario {
    background-color: var(--blanco);
    margin: -5rem auto 0 auto;
    width: 95%;
    padding: 5rem;
}

.campo {
    display: flex;
    margin-bottom: 2rem;
    gap: 2rem;
}

.campo_label {
    flex: 0 0 9rem;
    text-align: right;
}

.campo_field {
    flex: 1;
    border: 1px solid var(--gris);
}

.campo_field-textarea {
    height: 20rem;
}