/**
 * SEMTAK Lightbox - Lightweight Fancybox Replacement CSS
 *
 * @version 1.0.0
 * @author Damian Zięba
 * @description Minimal styling for WooCommerce product gallery lightbox
 * Size: ~4KB (vs Fancybox 25KB)
 */

/* ============================================
   VARIABLES
   ============================================ */

:root {
    --semtak-lb-bg: rgba(24, 24, 27, 0.95);
    --semtak-lb-color: #fff;
    --semtak-lb-btn-bg: rgba(255, 255, 255, 0.1);
    --semtak-lb-btn-hover: rgba(255, 255, 255, 0.2);
    --semtak-lb-thumb-size: 64px;
    --semtak-lb-thumb-gap: 8px;
    --semtak-lb-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --semtak-lb-z-index: 99999;
    /* Smoother animation curves */
    --semtak-lb-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --semtak-lb-ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   CONTAINER
   ============================================ */

.semtak-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: var(--semtak-lb-z-index);
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s var(--semtak-lb-ease-out), visibility 0.4s var(--semtak-lb-ease-out);
}

.semtak-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

/* Initial state for content - hidden and scaled down */
.semtak-lightbox__content {
    position: relative;
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.9) translateY(20px);
    transition: opacity 0.4s var(--semtak-lb-ease-out),
                transform 0.4s var(--semtak-lb-ease-out);
}

.semtak-lightbox.is-open .semtak-lightbox__content {
    opacity: 1;
    transform: scale(1) translateY(0);
    transition-delay: 0.08s;
}

/* ============================================
   BACKDROP
   ============================================ */

.semtak-lightbox__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--semtak-lb-bg);
    cursor: pointer;
}

/* ============================================
   CLOSE BUTTON
   ============================================ */

.semtak-lightbox__close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--semtak-lb-btn-bg);
    color: var(--semtak-lb-color);
    cursor: pointer;
    transition: background var(--semtak-lb-transition), transform var(--semtak-lb-transition);
}

.semtak-lightbox__close:hover {
    background: var(--semtak-lb-btn-hover);
    transform: scale(1.1);
}

.semtak-lightbox__close:focus-visible {
    outline: 2px solid var(--semtak-lb-color);
    outline-offset: 2px;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

.semtak-lightbox__main {
    position: relative;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 80px 20px;
    min-height: 0;
}

@media (max-width: 768px) {
    .semtak-lightbox__main {
        padding: 60px 16px 16px;
    }
}

/* ============================================
   LOADING STATE
   ============================================ */

.semtak-lightbox__content.is-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--semtak-lb-color);
    border-radius: 50%;
    animation: iga-spin 0.8s linear infinite;
}

@keyframes iga-spin {
    to { transform: rotate(360deg); }
}

.semtak-lightbox__image {
    max-width: 100%;
    max-height: calc(100vh - 200px);
    height: auto;
    object-fit: contain;
    /* Transitions handled in ANIMATION section */
}

@media (max-width: 768px) {
    .semtak-lightbox__image {
        max-height: calc(100vh - 180px);
    }
}

/* ============================================
   NAVIGATION ARROWS
   ============================================ */

.semtak-lightbox__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: var(--semtak-lb-btn-bg);
    color: var(--semtak-lb-color);
    cursor: pointer;
    transition: background var(--semtak-lb-transition), transform var(--semtak-lb-transition);
    z-index: 5;
}

.semtak-lightbox__nav--prev {
    left: 16px;
}

.semtak-lightbox__nav--next {
    right: 16px;
}

.semtak-lightbox__nav:hover {
    background: var(--semtak-lb-btn-hover);
    transform: translateY(-50%) scale(1.1);
}

.semtak-lightbox__nav:focus-visible {
    outline: 2px solid var(--semtak-lb-color);
    outline-offset: 2px;
}

@media (max-width: 768px) {
    .semtak-lightbox__nav {
        width: 40px;
        height: 40px;
    }

    .semtak-lightbox__nav--prev {
        left: 8px;
    }

    .semtak-lightbox__nav--next {
        right: 8px;
    }

    .semtak-lightbox__nav svg {
        width: 24px;
        height: 24px;
    }
}

/* ============================================
   THUMBNAILS
   ============================================ */

.semtak-lightbox__thumbs {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--semtak-lb-thumb-gap);
    padding: 12px 16px 20px;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.semtak-lightbox__thumbs::-webkit-scrollbar {
    display: none;
}

.semtak-lightbox__thumb {
    flex: 0 0 auto;
    width: var(--semtak-lb-thumb-size);
    height: var(--semtak-lb-thumb-size);
    padding: 0;
    border: 2px solid transparent;
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.3);
    cursor: pointer;
    overflow: hidden;
    opacity: 0.5;
    transition: opacity var(--semtak-lb-transition), border-color var(--semtak-lb-transition), transform var(--semtak-lb-transition);
}

.semtak-lightbox__thumb:hover {
    opacity: 0.8;
}

.semtak-lightbox__thumb.is-active {
    opacity: 1;
    border-color: var(--semtak-lb-color);
    transform: scale(1.05);
}

.semtak-lightbox__thumb:focus-visible {
    outline: 2px solid var(--semtak-lb-color);
    outline-offset: 2px;
}

.semtak-lightbox__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 768px) {
    .semtak-lightbox__thumbs {
        padding: 8px 12px 16px;
        gap: 6px;
    }

    .semtak-lightbox__thumb {
        width: 48px;
        height: 48px;
    }
}

/* ============================================
   ANIMATION - Image transitions
   ============================================ */

/* Smooth image change animation */
.semtak-lightbox__image {
    transition: opacity 0.25s var(--semtak-lb-ease-in-out),
                transform 0.3s var(--semtak-lb-ease-out);
}

.semtak-lightbox__content.is-loading .semtak-lightbox__image {
    opacity: 0;
    transform: scale(0.98);
}

/* Backdrop fade */
.semtak-lightbox__backdrop {
    opacity: 0;
    transition: opacity 0.4s var(--semtak-lb-ease-out);
}

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

/* Thumbnails and controls fade in */
.semtak-lightbox__thumbs,
.semtak-lightbox__nav,
.semtak-lightbox__close {
    opacity: 0;
    transition: opacity 0.3s var(--semtak-lb-ease-out),
                background 0.2s ease,
                transform 0.2s ease;
}

.semtak-lightbox.is-open .semtak-lightbox__thumbs {
    opacity: 1;
    transition-delay: 0.15s;
}

.semtak-lightbox.is-open .semtak-lightbox__nav,
.semtak-lightbox.is-open .semtak-lightbox__close {
    opacity: 1;
    transition-delay: 0.1s;
}

/* Spinner animation */
@keyframes iga-spin {
    to { transform: rotate(360deg); }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .semtak-lightbox,
    .semtak-lightbox *,
    .semtak-lightbox *::before,
    .semtak-lightbox *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}