/*
 * gallery-addon.css — Celestial Sessions
 * ----------------------------------------
 * Add-on only. Does NOT redefine base styles, fonts, colors, or layout.
 * Link AFTER your existing stylesheet so your variables/tokens cascade through.
 *
 * If your stylesheet exposes CSS custom properties (e.g. --color-bg, --color-text,
 * --font-body, etc.), swap the fallback values below to match. The gallery will
 * then automatically inherit your theme.
 *
 * Sections:
 *   1. Gallery section embed (snippet on index)
 *   2. Event card grid
 *   3. Gallery page header
 *   4. Photo grid
 *   5. Lightbox
 *   6. Responsive overrides
 */

/* ============================================================
   1. Gallery Section (snippet embed)
   ============================================================ */

/*
 * .cs-gallery-section sits inside your existing page flow.
 * It follows whatever spacing/padding rules surround it —
 * just like your ##About or ##Lineup sections.
 * The <h2> inside it will inherit your existing h2 styles.
 */

.cs-gallery-section {
    /* Match your other section spacing — adjust if needed */
    padding: 4rem 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

/* ============================================================
   2. Event Card Grid
   ============================================================ */

.cs-events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.cs-event-card {
    display: block;
    text-decoration: none;
    color: inherit;
    border-radius: 6px;
    overflow: hidden;
    /* Inherits background from your body/section — no override */
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.cs-event-card:hover {
    transform: translateY(-3px);
    opacity: 0.92;
}

.cs-card-img-wrap {
    position: relative;
    aspect-ratio: 3 / 2;
    overflow: hidden;
    background: rgba(255,255,255,0.05); /* subtle placeholder; inherits dark bg */
}

.cs-card-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.cs-event-card:hover .cs-card-thumb {
    transform: scale(1.04);
}

.cs-card-info {
    padding: 0.75rem 0.25rem 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

/* These inherit your existing type styles; sizes keep them secondary */
.cs-card-date {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0.55;
}

.cs-card-title {
    font-size: 1rem;
    font-weight: 500;
}

.cs-card-count {
    font-size: 0.75rem;
    opacity: 0.45;
}

/* ============================================================
   3. Gallery Page Header
   ============================================================ */

.cs-gallery-header {
    padding: 3rem 2rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.cs-back-link {
    /* Inherits your link/color styles */
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.6;
    text-decoration: none;
    transition: opacity 0.2s;
}
.cs-back-link:hover { opacity: 1; }

.cs-event-heading {
    margin-top: 1.5rem;
}

/* h1 inside .cs-event-heading inherits your existing h1 */

.cs-event-date-label {
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    opacity: 0.5;
    margin-bottom: 0.4rem;
}

.cs-photo-count {
    font-size: 0.85rem;
    opacity: 0.4;
    margin-top: 0.4rem;
    font-style: italic;
}

/* ============================================================
   4. Photo Grid
   ============================================================ */

.cs-photo-grid-wrap {
    padding: 0.5rem 1rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.cs-photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 4px;
}

.cs-photo-cell {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    display: block;
    background: rgba(255,255,255,0.04);
    border: none;
    padding: 0;
    cursor: pointer;
}

.cs-photo-cell img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease, filter 0.3s ease;
    filter: brightness(0.9);
}

.cs-cell-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
    color: #fff;
}

.cs-photo-cell:hover img {
    transform: scale(1.05);
    filter: brightness(1);
}
.cs-photo-cell:hover .cs-cell-overlay { opacity: 1; }
.cs-photo-cell:focus-visible { outline: 2px solid currentColor; outline-offset: -2px; }

/* ============================================================
   5. Lightbox
   ============================================================ */

.cs-lb {
    position: fixed;
    inset: 0;
    z-index: 9000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.cs-lb[hidden] { display: none !important; }
.cs-lb--open   { opacity: 1; }

.cs-lb-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.94);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Stage */
.cs-lb-stage {
    position: relative;
    z-index: 2;
    flex: 1;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 56px 72px 8px;
    min-height: 0;
}

.cs-lb-photo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 3px;
    box-shadow: 0 24px 80px rgba(0,0,0,0.7);
    transition: opacity 0.2s ease;
}

/* Spinner */
.cs-lb-spinner {
    display: none;
    position: absolute;
    inset: 0;
    align-items: center;
    justify-content: center;
    gap: 8px;
    z-index: 3;
}
.cs-lb-spinner span {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.5;
    animation: cs-pulse 1s ease-in-out infinite;
}
.cs-lb-spinner span:nth-child(2) { animation-delay: 0.18s; }
.cs-lb-spinner span:nth-child(3) { animation-delay: 0.36s; }

@keyframes cs-pulse {
    0%, 100% { opacity: 0.15; transform: scale(0.8); }
    50%       { opacity: 0.7;  transform: scale(1.1); }
}

/* Close */
.cs-lb-close {
    position: absolute;
    top: 16px; right: 16px;
    z-index: 10;
    width: 38px; height: 38px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,0.7);
    transition: color 0.2s, border-color 0.2s;
}
.cs-lb-close:hover { color: #fff; border-color: #fff; }

/* Nav arrows */
.cs-lb-nav {
    position: absolute;
    top: 50%; transform: translateY(-50%);
    z-index: 10;
    width: 44px; height: 44px;
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,0.65);
    transition: color 0.2s, border-color 0.2s;
}
.cs-lb-prev { left: 16px; }
.cs-lb-next { right: 16px; }
.cs-lb-nav:hover { color: #fff; border-color: rgba(255,255,255,0.7); }

/* Bottom bar */
.cs-lb-bar {
    position: relative;
    z-index: 10;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 20px 4px;
    gap: 12px;
}
.cs-lb-bar-left  { flex: 1; }
.cs-lb-bar-right { display: flex; justify-content: flex-end; flex: 1; }

.cs-lb-event {
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.5);
}

.cs-lb-date {
    display: block;
    font-size: 0.7rem;
    color: rgba(255,255,255,0.3);
    margin-top: 2px;
}

.cs-lb-counter {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    letter-spacing: 0.1em;
    white-space: nowrap;
}

.cs-lb-dl-btn {
    color: rgba(255,255,255,0.4);
    display: flex; align-items: center;
    text-decoration: none;
    transition: color 0.2s;
}
.cs-lb-dl-btn:hover { color: rgba(255,255,255,0.9); }

/* Filmstrip */
.cs-lb-strip {
    position: relative;
    z-index: 10;
    display: flex;
    gap: 3px;
    overflow-x: auto;
    padding: 4px 20px 14px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.15) transparent;
    max-width: 100%;
}
.cs-lb-strip::-webkit-scrollbar       { height: 3px; }
.cs-lb-strip::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }

.cs-lb-thumb {
    flex-shrink: 0;
    width: 52px; height: 38px;
    overflow: hidden;
    border-radius: 2px;
    border: 2px solid transparent;
    background: none;
    padding: 0;
    cursor: pointer;
    opacity: 0.4;
    transition: opacity 0.2s, border-color 0.2s;
}
.cs-lb-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cs-lb-thumb:hover         { opacity: 0.75; }
.cs-lb-thumb--active       { opacity: 1; border-color: rgba(255,255,255,0.7); }

/* ============================================================
   6. Responsive
   ============================================================ */

@media (max-width: 768px) {
    .cs-gallery-section  { padding: 2.5rem 1rem; }
    .cs-events-grid      { grid-template-columns: 1fr 1fr; gap: 1rem; }
    .cs-gallery-header   { padding: 2rem 1rem 1rem; }
    .cs-photo-grid-wrap  { padding: 0.5rem 0.5rem 3rem; }
    .cs-photo-grid       { grid-template-columns: repeat(3, 1fr); gap: 3px; }
    .cs-lb-stage         { padding: 48px 10px 6px; }
    .cs-lb-prev          { left: 6px; }
    .cs-lb-next          { right: 6px; }
    .cs-lb-event         { display: none; }
}

@media (max-width: 480px) {
    .cs-events-grid { grid-template-columns: 1fr; }
    .cs-photo-grid  { grid-template-columns: repeat(2, 1fr); }
}