/* ============================
Colores corporativos Editora Delta
Azul institucional: #002B5B
Rojo acento: #B22222
Gris neutro: #F5F5F5
============================ */

/* ============================
Estilos generales
============================ */
body {
font-family: Calibri, Arial, sans-serif;
background-color: #F5F5F5;
color: #1a1a1a;
line-height: 1.6;
}

/* ============================
Encabezado y barra de navegación
============================ */
.navbar {
background-color: #002B5B;
box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
font-size: 1.6rem;
font-weight: bold;
color: #ffffff !important;
letter-spacing: 0.5px;
}

.navbar a.nav-link {
color: #ffffff !important;
font-weight: 600;
padding: 10px 18px;
border-radius: 6px;
transition: all 0.25s ease;
}

.navbar a.nav-link:hover,
.navbar a.nav-link:focus {
background-color: #B22222;
color: #fff !important;
}

/* ============================
Slider
============================ */
.carousel-item img {
width: 100%;
height: 500px;
object-fit: cover;
}

.carousel-control-prev-icon,
.carousel-control-next-icon {
background-color: rgba(0, 0, 0, 0.3);
border-radius: 50%;
}

/* ============================
Títulos y secciones
============================ */
h2, h3, h4 {
color: #002B5B;
font-weight: 700;
letter-spacing: 0.5px;
}

hr {
border-top: 3px solid #B22222;
opacity: 0.3;
width: 80%;
margin: 1.5rem auto;
}

/* ============================
Botones de ofertas
============================ */
.btn-oferta {
background-color: #B22222;
color: white;
border: none;
border-radius: 8px;
padding: 12px 22px;
text-decoration: none;
font-size: 1.1rem;
margin: 6px;
display: inline-block;
transition: all 0.2s ease-in-out;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
}

.btn-oferta:hover {
background-color: #8b1a1a;
transform: translateY(-2px);
color: #fff;
}

/* ============================
Bloques de texto
============================ */
.container p.lead {
font-size: 1.1rem;
max-width: 800px;
margin: 0 auto;
color: #333;
}

/* ============================
Sección de contacto
============================ */
.contacto {
background-color: #ffffff;
border-top: 4px solid #002B5B;
border-radius: 8px;
padding: 25px;
box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
}

/* ============================
Footer
============================ */
footer {
background-color: #002B5B;
color: white;
text-align: center;
padding: 30px 0;
font-size: 0.95rem;
}

footer a {
color: #ffb3b3;
text-decoration: none;
}

footer a:hover {
text-decoration: underline;
}

/* ============================
Responsividad
============================ */
@media (max-width: 768px) {
.carousel-item img {
height: 300px;
}

.btn-oferta {
width: 80%;
margin: 8px auto;
}
}