/* ==========================================================================
   Przystań — warstwy nad treścią: lightbox, powrót na górę, sticky CTA
   ========================================================================== */

/* --------------------------------------------------------------------------
   Lightbox
   -------------------------------------------------------------------------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: grid;
    place-items: center;
    padding: clamp(0.75rem, 2vw, 2rem);
    opacity: 0;
    transition: opacity var(--duration-base) var(--ease-out-soft);
}

.lightbox.is-open {
    opacity: 1;
}

.lightbox[hidden] {
    display: none;
}

.lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(18, 24, 24, 0.9);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    cursor: zoom-out;
}

.lightbox__dialog {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    width: min(1100px, 100%);
    max-height: 100%;
    transform: scale(0.96);
    transition: transform var(--duration-base) var(--ease-spring);
}

.lightbox.is-open .lightbox__dialog {
    transform: scale(1);
}

.lightbox__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

.lightbox__caption {
    color: var(--text-on-dark);
    font-size: var(--step-1);
    font-weight: 600;
}

.lightbox__counter {
    color: var(--text-on-dark-muted);
    font-size: var(--step--1);
    text-align: center;
}

.lightbox__stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
}

.lightbox__image {
    max-width: 100%;
    max-height: min(74vh, 900px);
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 40px 100px -30px rgba(0, 0, 0, 0.8);
}

.lightbox__btn {
    display: grid;
    place-items: center;
    width: 2.9rem;
    height: 2.9rem;
    border-radius: 50%;
    background: rgba(var(--white-rgb), 0.14);
    color: var(--text-on-dark);
    transition:
        background-color var(--duration-base) var(--ease-out-soft),
        transform var(--duration-base) var(--ease-spring);
}

.lightbox__btn:hover {
    background: rgba(var(--white-rgb), 0.28);
    transform: scale(1.06);
}

.lightbox__btn--nav {
    position: absolute;
    top: 50%;
    translate: 0 -50%;
    z-index: 1;
}

.lightbox__btn--prev { left: clamp(0.25rem, 1.5vw, 1rem); }
.lightbox__btn--next { right: clamp(0.25rem, 1.5vw, 1rem); }

/* --------------------------------------------------------------------------
   Przycisk powrotu na górę
   -------------------------------------------------------------------------- */
.to-top {
    position: fixed;
    right: max(1.15rem, env(safe-area-inset-right));
    bottom: max(1.15rem, env(safe-area-inset-bottom));
    z-index: var(--z-sticky);
    display: grid;
    place-items: center;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--gradient-brand);
    color: var(--white);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition:
        opacity var(--duration-base) var(--ease-out-soft),
        transform var(--duration-base) var(--ease-spring),
        visibility 0s linear var(--duration-base),
        box-shadow var(--duration-base) var(--ease-out-soft);
}

.to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition-delay: 0s;
}

.to-top:hover {
    box-shadow: var(--shadow-glow-warm);
}

/* --------------------------------------------------------------------------
   Pływające CTA na mobile
   -------------------------------------------------------------------------- */
.sticky-cta {
    position: fixed;
    left: max(1rem, env(safe-area-inset-left));
    bottom: max(1.15rem, env(safe-area-inset-bottom));
    z-index: var(--z-sticky);
    display: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition:
        opacity var(--duration-base) var(--ease-out-soft),
        transform var(--duration-base) var(--ease-spring),
        visibility 0s linear var(--duration-base);
}

.sticky-cta.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition-delay: 0s;
}

/* Pływające CTA ma sens tam, gdzie nawigacja jest schowana pod hamburgerem */
@media (max-width: 1024px) {
    .sticky-cta {
        display: inline-flex;
    }
}