/**
 * Art Gallery Element - Styles
 *
 * Uses CSS custom properties (--nkw-ag-*) injected via the render function
 * so Cornerstone control values take effect. Fallback defaults are provided
 * for every property.
 *
 * @package Nubbernaut_Kidwind
 * @since 1.8.0
 */

/* ═══════ Container ═══════ */

.nkw-submissions-art-gallery {
    font-family: inherit;
}

/* ═══════ Filter Bar ═══════ */

.nkw-submissions-art-gallery .nkw-ag-filter-bar {
    background: var(--nkw-ag-filter-bg, #4D40B2);
    border: 1px solid var(--nkw-ag-filter-border, #4D40B2);
    border-radius: var(--nkw-ag-filter-radius, 0);
    padding: 1em;
    margin-bottom: var(--nkw-ag-section-spacing, 2em);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1em;
}

.nkw-submissions-art-gallery .nkw-ag-search-wrapper {
    flex: 1 1 220px;
    min-width: 180px;
}

.nkw-submissions-art-gallery .nkw-ag-search {
    width: 100%;
    padding: 0.5em 0.75em;
    border: 2px solid var(--nkw-ag-filter-search-border, rgba(255, 255, 255, 0.4));
    border-radius: 0.375em;
    font-size: 0.9375em;
    font-family: inherit;
    background: rgba(255, 255, 255, 0.15);
    color: var(--nkw-ag-filter-search-color, #fff);
    transition: border-color 0.15s ease, background 0.15s ease;
    outline: none;
}

.nkw-submissions-art-gallery .nkw-ag-search:focus {
    border-color: var(--nkw-ag-filter-search-color, #fff);
    background: rgba(255, 255, 255, 0.25);
}

.nkw-submissions-art-gallery .nkw-ag-search::placeholder {
    color: var(--nkw-ag-filter-search-color, rgba(255, 255, 255, 0.6));
    opacity: 0.6;
}

.nkw-submissions-art-gallery .nkw-ag-grade-toggles {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6em;
}

/* Grade toggle buttons */
.nkw-submissions-art-gallery .nkw-ag-grade-btn {
    padding: 0.35em 0.85em;
    border: none;
    border-radius: 0.375em;
    font-size: 0.8125em;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, outline-color 0.15s ease;
    background: var(--nkw-ag-filter-btn-bg, #fff);
    color: var(--nkw-ag-filter-btn-color, #4D40B2);
    line-height: 1.4;
    outline: var(--nkw-ag-filter-outline-width, 3px) solid transparent;
    outline-offset: var(--nkw-ag-filter-outline-offset, 2px);
}

.nkw-submissions-art-gallery .nkw-ag-grade-btn:hover {
    background: var(--nkw-ag-filter-btn-bg-hover, rgba(255, 255, 255, 0.85));
}

/* Grade toggle buttons — selected */
.nkw-submissions-art-gallery .nkw-ag-grade-btn.is-active {
    outline-color: var(--nkw-ag-filter-outline-color, #fff);
}

.nkw-submissions-art-gallery .nkw-ag-grade-btn.is-active:hover {
    background: var(--nkw-ag-filter-btn-bg-hover, rgba(255, 255, 255, 0.85));
}

/* "All" button */
.nkw-submissions-art-gallery .nkw-ag-grade-btn--all {
    background: var(--nkw-ag-filter-all-bg, #FF5E5E);
    color: var(--nkw-ag-filter-all-color, #fff);
}

.nkw-submissions-art-gallery .nkw-ag-grade-btn--all:hover {
    background: var(--nkw-ag-filter-all-bg-hover, #e54e4e);
}

.nkw-submissions-art-gallery .nkw-ag-grade-btn--all.is-active {
    outline-color: var(--nkw-ag-filter-outline-color, #fff);
}

.nkw-submissions-art-gallery .nkw-ag-grade-btn--all.is-active:hover {
    background: var(--nkw-ag-filter-all-bg-hover, #e54e4e);
}

/* ═══════ Status Bar (Admin) ═══════ */

.nkw-submissions-art-gallery .nkw-ag-status-bar {
    flex: 0 0 100%;
    display: flex;
    justify-content: center;
    margin-top: 0.25rem;
}

.nkw-submissions-art-gallery .nkw-ag-status-group {
    display: inline-flex;
    border: 2px solid #fff;
    border-radius: 0.375em;
    overflow: hidden;
}

.nkw-submissions-art-gallery .nkw-ag-status-btn {
    padding: 0.25rem 0.5rem;
    border: none;
    font-size: 0.8125em;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, filter 0.15s ease;
    background: #fff;
    color: var(--nkw-ag-heading-bg, #4d40b2);
    line-height: 1.4;
}

.nkw-submissions-art-gallery .nkw-ag-status-btn + .nkw-ag-status-btn {
    border-left: 1px solid rgba(77, 64, 178, 0.3);
}

.nkw-submissions-art-gallery .nkw-ag-status-btn:hover {
    background: rgba(230, 228, 240, 1);
}

.nkw-submissions-art-gallery .nkw-ag-status-btn.is-active {
    background: var(--nkw-ag-heading-bg, #4d40b2);
    color: #fff;
}

.nkw-submissions-art-gallery .nkw-ag-status-btn.is-active:hover {
    filter: brightness(1.15);
}

/* ═══════ Grade Sections ═══════ */

.nkw-submissions-art-gallery .nkw-ag-section + .nkw-ag-section {
    margin-top: var(--nkw-ag-section-spacing, 2em);
}

.nkw-submissions-art-gallery .nkw-ag-section-heading {
    font-size: var(--nkw-ag-heading-size, 2em);
    font-weight: 700;
    color: var(--nkw-ag-heading-color, #fff);
    background: var(--nkw-ag-heading-bg, #4d40b2);
    margin: 0 0 0.6em 0;
    padding: 0.4em 0.75em;
    line-height: 1.4;
    text-align: center;
}

/* ═══════ CSS Filtering ═══════ */

.nkw-submissions-art-gallery .nkw-ag-section.nkw-ag-hidden-grade {
    display: none;
}

.nkw-submissions-art-gallery .nkw-ag-card.nkw-ag-hidden-search {
    display: none;
}

.nkw-submissions-art-gallery .nkw-ag-card.nkw-ag-hidden-status {
    display: none;
}

.nkw-submissions-art-gallery .nkw-ag-card.nkw-ag-hidden-count {
    display: none;
}

/* Fade-in animation for sections and cards appearing */
@keyframes nkw-ag-fade-in {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

.nkw-submissions-art-gallery .nkw-ag-section.nkw-ag-fade-in {
    animation: nkw-ag-fade-in 0.25s ease both;
}

.nkw-submissions-art-gallery .nkw-ag-card.nkw-ag-fade-in {
    animation: nkw-ag-fade-in 0.25s ease both;
}

/* ═══════ Grid ═══════ */

.nkw-submissions-art-gallery .nkw-ag-grid {
    display: grid;
    grid-template-columns: repeat(var(--nkw-ag-grid-cols, 3), 1fr);
    gap: var(--nkw-ag-grid-gap, 1.5em);
    padding: 0 1.5rem;
}

.nkw-submissions-art-gallery .nkw-ag-grid[hidden] {
    display: none;
}

/* ═══════ Card ═══════ */

.nkw-submissions-art-gallery .nkw-ag-card {
    background: var(--nkw-ag-card-bg, #fff);
    border: 1px solid var(--nkw-ag-card-border, #e2e8f0);
    border-radius: var(--nkw-ag-card-radius, 0.5em);
    overflow: hidden;
    transition: box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
}

.nkw-submissions-art-gallery .nkw-ag-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Card Title */
.nkw-submissions-art-gallery .nkw-ag-card-title {
    font-size: var(--nkw-ag-title-size, 1.125em);
    font-weight: 700;
    color: var(--nkw-ag-title-color, #4D40B2);
    padding: 0.6em 0.75em 0.25em;
    margin: 0;
    line-height: 1.3;
    text-align: center;
}

/* Card Image */
.nkw-submissions-art-gallery .nkw-ag-card-image {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    overflow: hidden;
}

.nkw-submissions-art-gallery .nkw-ag-image-link {
    display: block;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.nkw-submissions-art-gallery .nkw-ag-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.3s ease;
}

.nkw-submissions-art-gallery .nkw-ag-no-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.05);
    color: var(--nkw-ag-meta-color, #718096);
    font-size: 0.875em;
}

/* Unapproved (admin view) */
.nkw-submissions-art-gallery .nkw-ag-card--unapproved .nkw-ag-img {
    opacity: var(--nkw-ag-unapproved-opacity, 0.4);
}

.nkw-submissions-art-gallery .nkw-ag-card--unapproved:hover .nkw-ag-img {
    opacity: 1;
}

/* ═══════ Student Info ═══════ */

.nkw-submissions-art-gallery .nkw-ag-card-student {
    font-size: var(--nkw-ag-meta-size, 0.875em);
    color: var(--nkw-ag-meta-color, #4D40B2);
    padding: 0.25em 0.75em 0.75em;
    line-height: 1.4;
    text-align: center;
}

.nkw-submissions-art-gallery .nkw-ag-student-state {
    color: var(--nkw-ag-meta-color, #4D40B2);
    opacity: 0.8;
}

/* ═══════ Admin Controls ═══════ */

.nkw-submissions-art-gallery .nkw-ag-card-admin {
    padding: 0.5em 0.75em;
    border-top: 1px solid var(--nkw-ag-card-border, #e2e8f0);
    background: rgba(0, 0, 0, 0.02);
    display: flex;
    gap: 0.5em;
}

.nkw-submissions-art-gallery .nkw-ag-edit-btn {
    flex: 1;
    padding: 0.4em 0.75em;
    background: #fff;
    color: var(--nkw-ag-heading-bg, #4d40b2);
    border: 1px solid var(--nkw-ag-heading-bg, #4d40b2);
    border-radius: 4px;
    font-size: 0.75em;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    line-height: 1.4;
}

.nkw-submissions-art-gallery .nkw-ag-edit-btn:hover {
    background: var(--nkw-ag-heading-bg, #4d40b2);
    color: #fff;
}

.nkw-submissions-art-gallery .nkw-ag-approve-btn {
    flex: 1;
    padding: 0.4em 0.75em;
    border: none;
    border-radius: 4px;
    font-size: 0.75em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.nkw-submissions-art-gallery .nkw-ag-approve-btn--unapproved {
    background: var(--nkw-ag-approve-bg, #38a169);
    color: var(--nkw-ag-approve-color, #fff);
}

.nkw-submissions-art-gallery .nkw-ag-approve-btn--unapproved:hover {
    filter: brightness(1.1);
}

.nkw-submissions-art-gallery .nkw-ag-approve-btn--approved {
    background: var(--nkw-ag-unapprove-bg, #e53e3e);
    color: var(--nkw-ag-unapprove-color, #fff);
}

.nkw-submissions-art-gallery .nkw-ag-approve-btn--approved:hover {
    filter: brightness(1.1);
}

.nkw-submissions-art-gallery .nkw-ag-approve-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

/* ═══════ Toggle Button (Show All / Show Less) ═══════ */

.nkw-submissions-art-gallery .nkw-ag-toggle-btn {
    display: block;
    margin: var(--nkw-ag-grid-gap, 1.5em) auto 0;
    padding: 0.6em 1.5em;
    background: var(--nkw-ag-btn-bg, #FF5E5E);
    color: var(--nkw-ag-btn-color, #fff);
    border: none;
    border-radius: var(--nkw-ag-btn-radius, 0.375em);
    font-size: 0.9375em;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.nkw-submissions-art-gallery .nkw-ag-toggle-btn:hover {
    background: var(--nkw-ag-btn-bg-hover, #e53232);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nkw-submissions-art-gallery .nkw-ag-toggle-btn:focus {
    outline: 2px solid var(--nkw-ag-btn-bg, #FF5E5E);
    outline-offset: 2px;
}

.nkw-submissions-art-gallery .nkw-ag-toggle-btn[hidden] {
    display: none;
}

/* ═══════ Empty State ═══════ */

.nkw-submissions-art-gallery .nkw-ag-empty {
    padding: 1.5rem 2.5rem;
    margin: var(--nkw-ag-section-spacing, 2em) auto;
    max-width: 600px;
    text-align: center;
    color: var(--nkw-ag-heading-bg, #4d40b2);
    background: #fff;
    border-radius: var(--nkw-ag-card-radius, 0.5em);
    border: 1px solid var(--nkw-ag-heading-bg, #4d40b2);
    box-sizing: border-box;
}

/* ═══════ Lightbox ═══════ */

.nkw-ag-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100000;
    align-items: center;
    justify-content: center;
}

.nkw-ag-lightbox.nkw-ag-lb-open {
    display: flex;
}

/* Dark backdrop */
.nkw-ag-lb-overlay {
    position: absolute;
    inset: 0;
    background: var(--nkw-ag-lb-overlay-bg, rgba(0, 0, 0, 0.85));
}

/* Content container */
.nkw-ag-lb-content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 90vw;
    max-height: 90vh;
}

/* The image */
.nkw-ag-lb-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--nkw-ag-lb-img-radius, 4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Close button */
.nkw-ag-lb-close {
    position: absolute;
    top: -2.5rem;
    right: -0.5rem;
    background: none;
    border: none;
    color: var(--nkw-ag-lb-btn-color, #fff);
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    opacity: 0.8;
    transition: opacity 0.2s, color 0.2s;
    z-index: 2;
}

.nkw-ag-lb-close:hover {
    opacity: 1;
    color: var(--nkw-ag-lb-btn-color-hover, #fff);
}

/* Prev / Next arrows */
.nkw-ag-lb-prev,
.nkw-ag-lb-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--nkw-ag-lb-nav-bg, rgba(0, 0, 0, 0.5));
    border: none;
    color: var(--nkw-ag-lb-btn-color, #fff);
    font-size: 2.5rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    opacity: 0.7;
    transition: opacity 0.2s, background 0.2s, color 0.2s;
    z-index: 2;
}

.nkw-ag-lb-prev:hover,
.nkw-ag-lb-next:hover {
    opacity: 1;
    background: var(--nkw-ag-lb-nav-bg-hover, rgba(0, 0, 0, 0.7));
    color: var(--nkw-ag-lb-btn-color-hover, #fff);
}

.nkw-ag-lb-prev {
    left: -3.5rem;
}

.nkw-ag-lb-next {
    right: -3.5rem;
}

/* Image counter */
.nkw-ag-lb-counter {
    position: absolute;
    bottom: -2rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--nkw-ag-lb-counter-color, rgba(255, 255, 255, 0.8));
    font-size: 0.875rem;
    white-space: nowrap;
}

/* ═══════ Responsive ═══════ */

/* Lightbox - move arrows inside on small screens */
@media (max-width: 768px) {
    .nkw-ag-lb-prev {
        left: 0.5rem;
    }

    .nkw-ag-lb-next {
        right: 0.5rem;
    }

    .nkw-ag-lb-close {
        top: -2rem;
        right: 0;
    }
}

/* Grid - 2 columns */
@media (max-width: 900px) {
    .nkw-submissions-art-gallery .nkw-ag-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Filter bar + grid - stack on mobile */
@media (max-width: 540px) {
    .nkw-submissions-art-gallery .nkw-ag-filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .nkw-submissions-art-gallery .nkw-ag-search-wrapper {
        flex: none;
    }

    .nkw-submissions-art-gallery .nkw-ag-grade-toggles {
        justify-content: center;
    }

    .nkw-submissions-art-gallery .nkw-ag-grid {
        grid-template-columns: 1fr;
    }
}