/* ==========================================================================
   CARRUSEL DE IMÁGENES (BANNER) - I.E. ANTONIO RICAURTE CASD
   --------------------------------------------------------------------------
   Estilos compartidos por las subsecciones de Especialidades.
   La estructura del HTML NO cambia, solo se conserva esta base:

       <div class="slider">
           <img class="slide active" src="..." alt="...">
           <img class="slide" src="..." alt="...">
           <img class="slide" src="..." alt="...">
       </div>

   js/carrusel.js agrega automáticamente el fondo ambiental, las flechas,
   los indicadores y la barra de progreso.
   ========================================================================== */

.slider {
    position: relative;
    width: 100%;
    height: clamp(240px, 38vw, 520px);
    margin: 24px auto 0;
    overflow: hidden;
    border-radius: 22px;
    background: linear-gradient(135deg, #0a2a1a 0%, #1a4a2a 50%, #0a2a1a 100%);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.14);
    isolation: isolate;
    outline: none;
    touch-action: pan-y;
    -webkit-user-select: none;
    user-select: none;
}

.slider:focus-visible {
    box-shadow: 0 0 0 4px rgba(15, 109, 47, 0.4), 0 20px 45px rgba(0, 0, 0, 0.14);
}

/* --------------------------------------------------------------------------
   FONDO AMBIENTAL
   Copia difuminada de la imagen activa: rellena las franjas laterales que
   deja el object-fit: contain sin recortar ni ocultar nada de la fotografía.
   -------------------------------------------------------------------------- */
.slider .carrusel-fondo {
    position: absolute;
    inset: -14%;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    filter: blur(30px) brightness(0.42) saturate(1.2);
    opacity: 0;
    z-index: 0;
    transition: opacity 0.9s ease;
    pointer-events: none;
}

.slider .carrusel-fondo.activo {
    opacity: 1;
}

/* --------------------------------------------------------------------------
   IMÁGENES
   La fotografía completa siempre es visible (contain) y la que está activa
   tiene un zoom lento tipo Ken Burns.
   -------------------------------------------------------------------------- */
.slider .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center center;
    opacity: 0;
    z-index: 1;
    transform: scale(1);
    transition: opacity 0.9s ease, transform 0.9s ease;
    will-change: opacity, transform;
    backface-visibility: hidden;
    -webkit-user-drag: none;
}

.slider .slide.active {
    opacity: 1;
    z-index: 2;
    transform: scale(1.05);
    transition: opacity 0.9s ease, transform 9s ease-out;
}

/* --------------------------------------------------------------------------
   FLECHAS ANTERIOR / SIGUIENTE
   -------------------------------------------------------------------------- */
.slider .carrusel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.32);
    color: #ffffff;
    cursor: pointer;
    z-index: 6;
    opacity: 0;
    transition: opacity 0.3s ease, background 0.3s ease, transform 0.3s ease;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.slider .carrusel-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
    pointer-events: none;
}

.slider .carrusel-prev {
    left: 16px;
}

.slider .carrusel-next {
    right: 16px;
}

.slider:hover .carrusel-btn,
.slider:focus-within .carrusel-btn {
    opacity: 1;
}

.slider .carrusel-btn:hover {
    background: rgba(15, 109, 47, 0.92);
    border-color: transparent;
    transform: translateY(-50%) scale(1.08);
}

.slider .carrusel-btn:active {
    transform: translateY(-50%) scale(0.95);
}

.slider .carrusel-btn:focus-visible {
    opacity: 1;
    outline: 3px solid rgba(241, 196, 15, 0.9);
    outline-offset: 2px;
}

/* En pantallas táctiles las flechas se muestran siempre */
@media (hover: none) {
    .slider .carrusel-btn {
        opacity: 1;
    }
}

/* --------------------------------------------------------------------------
   INDICADORES (PUNTOS)
   -------------------------------------------------------------------------- */
.slider .carrusel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 13px;
    border-radius: 30px;
    background: rgba(0, 0, 0, 0.3);
    z-index: 6;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.slider .carrusel-dot {
    width: 9px;
    height: 9px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.45);
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider .carrusel-dot:hover {
    background: rgba(255, 255, 255, 0.85);
}

.slider .carrusel-dot.active {
    width: 26px;
    border-radius: 5px;
    background: #f1c40f;
    box-shadow: 0 0 12px rgba(241, 196, 15, 0.6);
}

.slider .carrusel-dot:focus-visible {
    outline: 2px solid #f1c40f;
    outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   BARRA DE PROGRESO
   -------------------------------------------------------------------------- */
.slider .carrusel-progreso {
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.14);
    z-index: 6;
    pointer-events: none;
}

.slider .carrusel-progreso span {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #f1c40f, #f39c12);
}

/* --------------------------------------------------------------------------
   MOVIMIENTO REDUCIDO
   -------------------------------------------------------------------------- */
.slider.sin-animacion .slide,
.slider.sin-animacion .carrusel-fondo {
    transition: none !important;
}

.slider.sin-animacion .slide.active {
    transform: none;
}

@media (prefers-reduced-motion: reduce) {

    .slider .slide,
    .slider .slide.active,
    .slider .carrusel-fondo,
    .slider .carrusel-btn,
    .slider .carrusel-dot {
        transition: none !important;
    }

    .slider .slide.active {
        transform: none;
    }
}

/* --------------------------------------------------------------------------
   RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .slider {
        height: clamp(230px, 44vw, 430px);
        border-radius: 18px;
    }
}

@media (max-width: 768px) {
    .slider {
        height: clamp(210px, 52vw, 340px);
        margin-top: 18px;
        border-radius: 16px;
        box-shadow: 0 14px 30px rgba(0, 0, 0, 0.12);
    }

    .slider .carrusel-btn {
        width: 38px;
        height: 38px;
    }

    .slider .carrusel-btn svg {
        width: 17px;
        height: 17px;
    }

    .slider .carrusel-prev {
        left: 10px;
    }

    .slider .carrusel-next {
        right: 10px;
    }

    .slider .carrusel-dots {
        bottom: 12px;
        padding: 6px 10px;
        gap: 7px;
    }

    .slider .carrusel-dot.active {
        width: 22px;
    }
}

@media (max-width: 480px) {
    .slider {
        height: clamp(190px, 56vw, 260px);
        border-radius: 14px;
    }

    .slider .carrusel-progreso {
        height: 3px;
    }

    .slider .carrusel-dots {
        bottom: 10px;
        padding: 5px 9px;
        gap: 6px;
    }

    .slider .carrusel-dot {
        width: 8px;
        height: 8px;
    }

    .slider .carrusel-dot.active {
        width: 18px;
    }
}