/* --- Definitive Gallery Styles (v2.0) --- */
:root {
    --wpmg-timing: 0.35s;
    --wpmg-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

a.wpmg-gallery-item {
    cursor: pointer;
    line-height: 0;
    display: inline-block;
}
a.wpmg-gallery-item img {
    transition: transform 0.3s var(--wpmg-easing), filter 0.3s var(--wpmg-easing);
}
a.wpmg-gallery-item:hover img {
    transform: scale(1.03);
    filter: brightness(1.08);
}

/* --- Modal Overlay & Layout --- */
.wpmg-modal {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 99999;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--wpmg-timing) var(--wpmg-easing), visibility var(--wpmg-timing);
}
.wpmg-modal.is-visible {
    opacity: 1;
    visibility: visible;
}
.wpmg-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* --- UI Elements: Header, Counter, Close --- */
.wpmg-header, .wpmg-caption {
    opacity: 0;
    transform: translateY(-20px);
    transition: opacity 0.3s, transform 0.3s;
}
.is-visible .wpmg-header, .is-visible .wpmg-caption {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.2s;
}

.wpmg-header {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
    z-index: 10;
}
.wpmg-close {
    font-size: 40px;
    line-height: 1;
    opacity: 0.8;
    transition: transform 0.2s, opacity 0.2s;
}
.wpmg-close:hover {
    transform: scale(1.1);
    opacity: 1;
}

/* --- Container & Image Wrapper for Sliding --- */
.wpmg-container {
    width: 100%; height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.wpmg-image-wrapper {
    position: relative;
    width: calc(100% - 80px); /* Breathing room */
    height: calc(100% - 120px); /* Breathing room */
    transform: translateX(0);
    transition: transform var(--wpmg-timing) var(--wpmg-easing);
}

/* --- The Image & Zoom/Pan styles --- */
.wpmg-modal-image {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: contain;
    cursor: zoom-in;
    transition: opacity var(--wpmg-timing), transform 0.3s var(--wpmg-easing);
    will-change: transform; /* Performance hint for the browser */
}
.wpmg-modal-image.is-dragging {
    cursor: grabbing;
}
.wpmg-modal-image.is-zoomed {
    cursor: grab;
}
.wpmg-modal-image.no-zoom {
    cursor: default;
}

/* --- Navigation Buttons --- */
.wpmg-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    color: white;
    padding: 20px 15px;
    opacity: 0.7;
    transition: opacity 0.2s, transform 0.2s;
    z-index: 10;
}
.wpmg-nav:hover {
    opacity: 1;
    transform: translateY(-50%) scale(1.05);
}
.wpmg-prev { left: 10px; }
.wpmg-next { right: 10px; }
.wpmg-modal.is-single-image .wpmg-nav,
.wpmg-modal.is-single-image .wpmg-counter {
    display: none;
}

/* --- UI Elements: Loader & Caption --- */
.wpmg-loader {
    position: absolute;
    top: 50%; left: 50%;
    width: 40px; height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: white;
    border-radius: 50%;
    animation: wpmg-spin 1s linear infinite;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 11;
}
.wpmg-modal.is-loading .wpmg-loader { opacity: 1; }
@keyframes wpmg-spin { to { transform: rotate(360deg); } }

.wpmg-caption {
    position: absolute;
    bottom: 15px; left: 50%;
    transform: translateX(-50%) translateY(20px);
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    max-width: 80vw;
}

/* --- Base button styles for accessibility --- */
.wpmg-nav, .wpmg-close {
    background: none;
    border: none;
    cursor: pointer;
}
.wpmg-nav:focus-visible, .wpmg-close:focus-visible {
    outline: 2px solid dodgerblue;
    outline-offset: 2px;
}

/* --- Mobile Adjustments --- */
@media (max-width: 768px) {
    .wpmg-image-wrapper {
        width: 100%;
        height: calc(100% - 100px);
    }
    .wpmg-nav { display: none; }
}