/**
 * hero-slider.css
 *
 * Slideshow per il blocco Hero del page builder. Stile "ultra moderno":
 *   - Cross-fade GPU-friendly (opacity + transform)
 *   - Ken Burns: lieve zoom continuo sull'immagine attiva (cinematografico)
 *   - Dots minimal, frecce ghost, progress bar finissima
 *   - Mobile: touch swipe (gestito da JS), niente frecce di default
 *   - Rispetta prefers-reduced-motion
 *
 * Si attiva via class .hero-slider (vedi hero-slider.js).
 * Il contenitore .hero-slider va dentro al .hero-banner come sostituto di .hero-bg / <img>.
 */

.hero-slider {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0; /* sotto a .hero-overlay e .hero-content */
}

/* Variante "in container" per i formati split: il slider riempie il box image-side */
.hero-image-side .hero-slider,
.hero-slider.is-contained {
    position: absolute;
    inset: 0;
}

.hero-slider-track {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    will-change: opacity;
    pointer-events: none;
}

.hero-slide.is-active {
    opacity: 1;
    pointer-events: auto;
    z-index: 1;
}

.hero-slide img,
.hero-slide video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* ─── Ken Burns: zoom continuo sull'immagine attiva ───────────
   Usiamo @keyframes invece di transition perché il primo rendering
   con .is-active applica direttamente lo stato finale senza animare.
   Con animation: parte sempre da capo quando .is-active viene
   computata (anche al primo load).                              */
@keyframes hero-kenburns-in {
    from {
        transform: scale(1.0);
    }
    to {
        transform: scale(1.10);
    }
}

.hero-slider[data-transizione="fade_kenburns"] .hero-slide img,
.hero-slider[data-transizione="fade_kenburns"] .hero-slide video {
    transform: scale(1.0);
    will-change: transform;
}

.hero-slider[data-transizione="fade_kenburns"] .hero-slide.is-active img,
.hero-slider[data-transizione="fade_kenburns"] .hero-slide.is-active video {
    animation: hero-kenburns-in 7s ease-out forwards;
}

/* ─── Slide orizzontale (alternativa classica) ────────────── */
.hero-slider[data-transizione="slide"] .hero-slider-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.hero-slider[data-transizione="slide"] .hero-slide {
    position: relative;
    inset: auto;
    flex: 0 0 100%;
    opacity: 1;
    pointer-events: auto;
    transition: none;
}

/* ─── Dots indicator ────────────────────────────────────────── */
.hero-slider-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 5;
    pointer-events: auto;
}

.hero-slider-dot {
    width: 32px;
    height: 3px;
    background: rgba(255, 255, 255, 0.4);
    border: none;
    border-radius: 999px;
    padding: 0;
    cursor: pointer;
    transition: background 0.2s ease, width 0.3s ease;
    outline-offset: 4px;
}

.hero-slider-dot:hover {
    background: rgba(255, 255, 255, 0.7);
}

.hero-slider-dot.is-active {
    background: rgba(255, 255, 255, 1);
    width: 48px;
}

/* ─── Frecce navigazione ────────────────────────────────────── */
.hero-slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: background 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
    /* Visibili sempre (più accessibili su touch); aumentano contrasto su hover */
    opacity: 0.7;
}

.hero-slider:hover .hero-slider-arrow,
.hero-slider:focus-within .hero-slider-arrow {
    opacity: 1;
}

.hero-slider-arrow:hover {
    background: rgba(0, 0, 0, 0.6);
    transform: translateY(-50%) scale(1.08);
}

.hero-slider-arrow.prev {
    left: 16px;
}

.hero-slider-arrow.next {
    right: 16px;
}

.hero-slider-arrow svg {
    width: 22px;
    height: 22px;
}

/* ─── Progress bar ───────────────────────────────────────────── */
.hero-slider-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 5;
    pointer-events: none;
}

.hero-slider-progress-fill {
    height: 100%;
    background: rgba(255, 255, 255, 0.85);
    width: 0;
    transition: width linear;
    will-change: width;
}

/* ─── Mobile tweaks ──────────────────────────────────────────── */
@media (max-width: 640px) {
    .hero-slider-arrow {
        width: 36px;
        height: 36px;
    }

    .hero-slider-arrow.prev {
        left: 8px;
    }

    .hero-slider-arrow.next {
        right: 8px;
    }

    .hero-slider-dots {
        bottom: 16px;
    }

    .hero-slider-dot {
        width: 24px;
    }

    .hero-slider-dot.is-active {
        width: 36px;
    }
}

/* ─── Reduced motion: rispetta preferenze utente ────────────── */
@media (prefers-reduced-motion: reduce) {
    .hero-slide {
        transition: opacity 0.2s linear;
    }

    .hero-slider[data-transizione="fade_kenburns"] .hero-slide img,
    .hero-slider[data-transizione="fade_kenburns"] .hero-slide video {
        transform: none !important;
        transition: none !important;
    }

    .hero-slider[data-transizione="slide"] .hero-slider-track {
        transition: transform 0.2s linear;
    }

    .hero-slider-progress-fill {
        transition: none;
    }
}