body {
    background-color: #f5f7fb;
    color: #212529;
}

header {
    background-color: #ffffff;
}

.titulo-sitio {
    font-size: 30px;
    font-weight: bold;
    font-family: Georgia, serif;
}

.nav {
    gap: 8px;
}

.nav-link {
    border-radius: 8px;
    padding: 8px 14px;
}

.nav-link:hover {
    background-color: #eef3ff;
}

.hero {
    background: linear-gradient(135deg, #e8f0ff, #f7f9ff);
    padding: 45px;
    border-radius: 16px;
    margin-bottom: 30px;
    border: 1px solid #dfe7f6;
}

.hero p {
    max-width: 700px;
}

.card {
    margin-bottom: 20px;
    border: 1px solid #e4e7ec;
    border-radius: 14px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
}

.card-body {
    padding: 22px;
}

.seccion-titulo {
    margin-bottom: 18px;
    font-weight: bold;
}

.caja-lateral {
    background-color: #ffffff;
    border: 1px solid #e4e7ec;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
}

.lista-simple {
    padding-left: 18px;
    margin-bottom: 0;
}

.lista-simple li {
    margin-bottom: 8px;
}

.form-card {
    max-width: 560px;
    margin: 50px auto;
}

.encabezado-formulario {
    text-align: center;
    margin-bottom: 22px;
}

footer {
    margin-top: 50px;
    background-color: #ffffff;
}

.no-funciona {
    color: #6c757d;
    text-decoration: none;
    cursor: default;
}

.no-funciona:hover {
    color: #6c757d;
}

.tarjeta-curso h5,
.tarjeta-curso h4 {
    margin-bottom: 12px;
}

.badge-materia {
    background-color: #edf2ff;
    color: #3358b0;
    font-weight: normal;
    padding: 8px 12px;
    border-radius: 20px;
    display: inline-block;
    margin-right: 8px;
    margin-bottom: 8px;
}

@media (max-width: 767px) {
    .titulo-sitio {
        display: inline-block;
        margin: 10px 0;
    }

    .hero {
        padding: 28px;
    }

    .nav {
        justify-content: center !important;
    }
}