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

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f4f4;
    color: #222;
}

/* ENCABEZADO */
.header {
    height: 70px;
    background-color: white;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 50px;

    border-bottom: 1px solid #ddd;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #222;
}

.logo span {
    color: #555;
}

.menu {
    display: flex;
    gap: 35px;
}

.menu a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
}

.menu a:hover {
    color: #0066cc;
}

/* BARRA NARANJA */
.barra-naranja {
    height: 18px;
    background-color: #f05a00;

    color: white;
    text-align: center;

    font-size: 12px;
    line-height: 18px;
}

/* SECCIÓN PRINCIPAL */
.hero {
    height: 300px;

    background: linear-gradient(
        120deg,
        #123e78,
        #0073c6
    );

    color: white;

    text-align: center;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 38px;
    margin-bottom: 18px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 25px;
}

.hero button {
    background-color: #20b84b;

    border: none;

    color: white;

    font-size: 16px;

    padding: 12px 25px;

    border-radius: 4px;

    cursor: pointer;
}

.hero button:hover {
    background-color: #17943a;
}

/* CONTENIDO */
.contenido {
    padding: 35px 50px 50px;

    background-color: #f5f5f5;
}

.contenido h2 {
    font-size: 24px;

    margin-bottom: 25px;

    color: #222;
}

/* TARJETAS */
.cursos {
    display: flex;
    gap: 25px;
    width: 100%;
}

.curso {
    position: relative;

    flex: 1;

    min-height: 190px;

    background-color: white;

    border: 1px solid #c9c9c9;

    padding: 25px;

    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.10);

    border-radius: 2px;
}

.curso h3 {
    font-size: 22px;

    margin-bottom: 18px;

    color: #333;
}

.curso p {
    font-size: 15px;

    line-height: 1.6;

    color: #555;

    margin-bottom: 20px;
}

/* PRECIO */
.precio {
    color: #168b4a;

    font-size: 20px;

    font-weight: bold;
}

/* CURSO DESTACADO */
.destacado {
    border-color: #80a9b5;
}

.etiqueta {
    position: absolute;

    top: -10px;
    right: 20px;

    background-color: #e74c3c;

    color: white;

    font-size: 10px;

    padding: 5px 10px;

    border-radius: 2px;
}

/* PARA CELULAR */
@media (max-width: 700px) {

    .header {
        padding: 0 20px;
    }

    .menu {
        gap: 15px;
    }

    .menu a {
        font-size: 13px;
    }

    .logo {
        font-size: 19px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 15px;
    }

    .cursos {
        flex-direction: column;
    }

    .contenido {
        padding: 25px 20px;
    }
}