/* Oferta Educativa — Instituto Tecnologico de Tlahuac II
   Paleta institucional: azul TecNM #1b396a / vino gob.mx #691c32 / oro #bc955c
*/

.oferta {
    --oferta-radio: 1rem;
    --oferta-borde: rgba(27, 57, 106, 0.12);
    --oferta-sombra: 0 1px 2px rgba(16, 40, 73, 0.06), 0 8px 24px rgba(16, 40, 73, 0.07);
    --oferta-sombra-alta: 0 2px 4px rgba(16, 40, 73, 0.08), 0 18px 40px rgba(16, 40, 73, 0.16);
    --oferta-transicion: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------------------------------------------------------------- Portada */

.oferta-hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 15% 120%, rgba(188, 149, 92, 0.35), transparent 55%),
        linear-gradient(135deg, #1b396a 0%, #142c54 55%, #102849 100%);
    color: #ffffff;
    padding: clamp(2.75rem, 7vw, 4.5rem) 0 clamp(3.5rem, 8vw, 5.5rem);
}

/* Trama geometrica sutil, evoca circuito/red sin competir con el texto */
.oferta-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(ellipse 80% 70% at 70% 0%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 80% 70% at 70% 0%, #000 30%, transparent 75%);
    pointer-events: none;
}

.oferta-hero > .container {
    position: relative;
    z-index: 1;
}

.oferta-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(188, 149, 92, 0.55);
    color: #f0d9b5;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.oferta-hero h1 {
    margin: 1rem 0 0;
    font-size: clamp(1.9rem, 5vw, 3.1rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.01em;
    max-width: 18ch;
}

.oferta-hero h1 em {
    font-style: normal;
    color: var(--gobmx-gold);
}

.oferta-hero-lead {
    margin: 1.1rem 0 0;
    max-width: 58ch;
    font-size: clamp(1rem, 1.6vw, 1.12rem);
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.86);
}

.oferta-hero-datos {
    display: flex;
    flex-wrap: wrap;
    gap: 2.25rem;
    margin: 2rem 0 0;
    padding: 0;
    list-style: none;
}

.oferta-hero-dato strong {
    display: block;
    font-size: clamp(1.6rem, 3.5vw, 2.15rem);
    font-weight: 800;
    line-height: 1;
    color: var(--gobmx-gold);
}

.oferta-hero-dato span {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.78);
}

/* ----------------------------------------------------------------- Filtro */

.oferta-filtro {
    position: relative;
    z-index: 2;
    margin-top: clamp(-2.5rem, -4vw, -1.75rem);
    background: #ffffff;
    border: 1px solid var(--oferta-borde);
    border-radius: var(--oferta-radio);
    box-shadow: var(--oferta-sombra);
    padding: 1rem 1.15rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.85rem;
}

.oferta-filtro-titulo {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: var(--tecnm-gray);
}

.oferta-filtro-grupo {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.oferta-filtro-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: 1px solid var(--oferta-borde);
    background: #ffffff;
    color: var(--tecnm-blue);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--oferta-transicion), color var(--oferta-transicion), border-color var(--oferta-transicion);
}

.oferta-filtro-btn:hover {
    background-color: #eef2f8;
}

.oferta-filtro-btn[aria-pressed="true"] {
    background-color: var(--tecnm-blue);
    border-color: var(--tecnm-blue);
    color: #ffffff;
}

.oferta-filtro-btn[data-modalidad="linea"][aria-pressed="true"] {
    background-color: var(--gobmx-wine);
    border-color: var(--gobmx-wine);
}

.oferta-filtro-btn .oferta-filtro-conteo {
    font-size: 0.78rem;
    opacity: 0.7;
}

/* ---------------------------------------------------------------- Secciones */

.oferta-seccion {
    margin-top: clamp(2.5rem, 5vw, 3.5rem);
}

.oferta-seccion[hidden] {
    display: none;
}

.oferta-seccion-encabezado {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    margin-bottom: 1.5rem;
}

.oferta-seccion-icono {
    flex: 0 0 auto;
    width: 44px;
    height: 44px;
    border-radius: 0.7rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #ffffff;
    background: linear-gradient(140deg, var(--mod-color), var(--mod-color-dark));
}

.oferta-seccion-titulo {
    margin: 0;
    font-size: clamp(1.15rem, 2.4vw, 1.4rem);
    font-weight: 700;
    color: var(--mod-color);
}

.oferta-seccion-texto {
    margin: 0.2rem 0 0;
    font-size: 0.93rem;
    color: var(--tecnm-gray);
    max-width: 70ch;
}

/* Variables por modalidad */
.oferta-presencial {
    --mod-color: #1b396a;
    --mod-color-dark: #102849;
    --mod-rgb: 27, 57, 106;
}

.oferta-linea {
    --mod-color: #691c32;
    --mod-color-dark: #4d1424;
    --mod-rgb: 105, 28, 50;
}

/* ---------------------------------------------------------------- Tarjetas */

.oferta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 1.35rem;
}

.oferta-card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border: 1px solid var(--oferta-borde);
    border-radius: var(--oferta-radio);
    box-shadow: var(--oferta-sombra);
    overflow: hidden;
    transition: transform var(--oferta-transicion), box-shadow var(--oferta-transicion), border-color var(--oferta-transicion);
}

.oferta-card::before {
    content: "";
    display: block;
    height: 5px;
    background: linear-gradient(90deg, var(--mod-color), var(--mod-color-dark));
}

.oferta-card:hover,
.oferta-card:focus-within {
    transform: translateY(-5px);
    box-shadow: var(--oferta-sombra-alta);
    border-color: rgba(var(--mod-rgb), 0.3);
}

.oferta-card-cuerpo {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    padding: 1.4rem 1.4rem 1.5rem;
}

.oferta-card-icono {
    width: 54px;
    height: 54px;
    border-radius: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--mod-color);
    background-color: rgba(var(--mod-rgb), 0.08);
    border: 1px solid rgba(var(--mod-rgb), 0.16);
    transition: background-color var(--oferta-transicion), color var(--oferta-transicion);
}

.oferta-card:hover .oferta-card-icono,
.oferta-card:focus-within .oferta-card-icono {
    background-color: var(--mod-color);
    color: #ffffff;
}

.oferta-card-badge {
    position: absolute;
    top: 1.35rem;
    right: 1.4rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--mod-color);
    background-color: rgba(var(--mod-rgb), 0.08);
    border: 1px solid rgba(var(--mod-rgb), 0.2);
}

.oferta-card-titulo {
    margin: 1.05rem 0 0;
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.35;
    color: var(--tecnm-blue);
}

.oferta-linea .oferta-card-titulo {
    color: var(--mod-color);
}

.oferta-card-texto {
    margin: 0.6rem 0 0;
    font-size: 0.92rem;
    line-height: 1.6;
    color: #4b5563;
    flex: 1 1 auto;
}

.oferta-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1rem;
    margin: 1.1rem 0 0;
    padding: 0.85rem 0 0;
    border-top: 1px dashed rgba(var(--mod-rgb), 0.2);
    list-style: none;
    font-size: 0.82rem;
    color: var(--tecnm-gray);
}

.oferta-card-meta li {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.oferta-card-meta i {
    color: var(--mod-color);
    opacity: 0.75;
}

.oferta-card-enlace {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-top: 1.1rem;
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--mod-color);
    text-decoration: none;
}

/* El enlace cubre la tarjeta para ampliar el area de clic; el texto sigue
   siendo el destino accesible para lectores de pantalla y teclado. */
.oferta-card-enlace::after {
    content: "";
    position: absolute;
    inset: 0;
}

.oferta-card-enlace i {
    transition: transform var(--oferta-transicion);
}

.oferta-card:hover .oferta-card-enlace i {
    transform: translateX(4px);
}

.oferta-card-enlace:hover,
.oferta-card-enlace:focus-visible {
    color: var(--mod-color-dark);
    text-decoration: underline;
}

.oferta-card:focus-within {
    outline: 3px solid rgba(var(--mod-rgb), 0.45);
    outline-offset: 3px;
}

.oferta-card-enlace:focus-visible {
    outline: none;
}

/* ------------------------------------------------------------ Cierre / CTA */

.oferta-cta {
    margin: clamp(3rem, 6vw, 4.5rem) 0 0;
    padding: clamp(1.75rem, 4vw, 2.5rem);
    border-radius: var(--oferta-radio);
    background:
        radial-gradient(circle at 92% 8%, rgba(188, 149, 92, 0.28), transparent 45%),
        linear-gradient(135deg, #1b396a, #102849);
    color: #ffffff;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
}

.oferta-cta h2 {
    margin: 0;
    font-size: clamp(1.15rem, 2.6vw, 1.5rem);
    font-weight: 700;
}

.oferta-cta p {
    margin: 0.4rem 0 0;
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.95rem;
    max-width: 60ch;
}

.oferta-cta-acciones {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.oferta-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.3rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.93rem;
    text-decoration: none;
    border: 1px solid transparent;
    transition: background-color var(--oferta-transicion), color var(--oferta-transicion);
}

.oferta-cta-btn-solido {
    background-color: var(--gobmx-gold);
    color: #23180a;
}

.oferta-cta-btn-solido:hover,
.oferta-cta-btn-solido:focus {
    background-color: #d0ae76;
    color: #23180a;
}

.oferta-cta-btn-linea {
    border-color: rgba(255, 255, 255, 0.5);
    color: #ffffff;
}

.oferta-cta-btn-linea:hover,
.oferta-cta-btn-linea:focus {
    background-color: rgba(255, 255, 255, 0.14);
    color: #ffffff;
}

/* ------------------------------------------------------------ Adaptaciones */

@media (max-width: 575.98px) {
    .oferta-filtro {
        flex-direction: column;
        align-items: stretch;
    }

    .oferta-hero-datos {
        gap: 1.5rem;
    }

    .oferta-card-badge {
        position: static;
        margin-top: 0.9rem;
        align-self: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    .oferta-card,
    .oferta-card-icono,
    .oferta-card-enlace i,
    .oferta-filtro-btn {
        transition: none;
    }

    .oferta-card:hover,
    .oferta-card:focus-within {
        transform: none;
    }

    .oferta-card:hover .oferta-card-enlace i {
        transform: none;
    }
}

/* Modo de alto contraste del sitio */
.high-contrast .oferta-card,
.high-contrast .oferta-filtro,
.high-contrast .oferta-cta {
    background: #111111 !important;
    border-color: #ffffff !important;
    color: #ffffff !important;
}

.high-contrast .oferta-card-titulo,
.high-contrast .oferta-card-texto,
.high-contrast .oferta-card-enlace,
.high-contrast .oferta-seccion-titulo {
    color: #ffffff !important;
}