/* ================================================================
   FONDS VERDUN — Galerie photographique
   Palette : noir chaud · or sépia · texte crème
   ================================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg:         #0e0d0b;
    --surface:    #1c1a16;
    --surface-2:  #272420;
    --border:     #3a352c;
    --gold:       #c9a86c;
    --gold-dim:   #7a6440;
    --text:       #e6dbc8;
    --text-dim:   #8a7f6e;
    --white:      #f5f0e8;
    --hh:         62px;   /* header height */
    --fh:         50px;   /* footer height */
    --gap:        3px;
    --radius:     3px;
    --trans:      0.22s ease;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 15px;
    min-height: 100vh;
}

/* ----------------------------------------------------------------
   HEADER
   ---------------------------------------------------------------- */
#header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--hh);
    background: rgba(14, 13, 11, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 18px;
    z-index: 200;
}

.hd-logos {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.hd-logos .logo {
    height: 38px;
    width: auto;
    opacity: 0.8;
    filter: grayscale(15%);
}

.hd-title {
    flex: 1;
    text-align: center;
    min-width: 0;
}
.hd-title h1 {
    font-size: 1.05rem;
    font-weight: normal;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--gold);
    white-space: nowrap;
}
.hd-sub {
    font-size: .7rem;
    color: var(--text-dim);
    letter-spacing: .07em;
    margin-top: 2px;
    font-family: system-ui, sans-serif;
}

.hd-controls {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Bouton info ⓘ */
.btn-info {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.14);
    color: var(--text-dim);
    border-radius: var(--radius);
    width: 34px; height: 34px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--trans), color var(--trans), border-color var(--trans);
}
.btn-info:hover {
    background: rgba(255,255,255,.14);
    color: var(--gold);
    border-color: var(--gold-dim);
}

/* ----------------------------------------------------------------
   PANNEAU INFO
   ---------------------------------------------------------------- */
.info-panel {
    position: fixed;
    inset: 0;
    z-index: 400;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.info-panel[hidden] { display: none; }

.info-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.75);
    cursor: pointer;
}

.info-box {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    max-width: 640px;
    width: 100%;
    max-height: 82vh;
    overflow-y: auto;
    padding: 28px 32px 32px;
    z-index: 1;
}

.info-box h2 {
    font-size: 1.1rem;
    color: var(--gold);
    font-weight: normal;
    letter-spacing: .06em;
    margin-bottom: 20px;
    padding-right: 28px;
}

.info-box h3 {
    font-size: .82rem;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--gold-dim);
    font-weight: normal;
    margin-bottom: 8px;
}

.info-box section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.info-box section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.info-box p, .info-box li {
    font-family: system-ui, sans-serif;
    font-size: .84rem;
    color: var(--text);
    line-height: 1.6;
}

.info-box ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-box li::before {
    content: '·';
    color: var(--gold-dim);
    margin-right: 8px;
}

.info-box strong { color: var(--text); }

.info-box a { color: var(--gold-dim); text-decoration: underline; text-decoration-color: rgba(201,168,108,.3); }
.info-box a:hover { color: var(--gold); text-decoration-color: var(--gold); }

.info-close {
    position: absolute;
    top: 14px; right: 14px;
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 4px;
    transition: color var(--trans);
}
.info-close:hover { color: var(--text); }

.search-wrap {
    display: flex;
    align-items: center;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color var(--trans);
}
.search-wrap:focus-within { border-color: var(--gold-dim); }

.search-icon {
    width: 16px; height: 16px;
    margin-left: 9px;
    color: var(--text-dim);
    flex-shrink: 0;
}

#searchInput {
    background: none;
    border: none;
    outline: none;
    color: var(--text);
    font-family: system-ui, sans-serif;
    font-size: .85rem;
    padding: 7px 8px;
    width: 200px;
}
#searchInput::placeholder { color: var(--text-dim); }

#clearSearch {
    background: none;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 5px 10px;
    font-size: .78rem;
    transition: color var(--trans);
    line-height: 1;
}
#clearSearch:hover { color: var(--text); }

/* ----------------------------------------------------------------
   MAIN / GALLERY
   ---------------------------------------------------------------- */
main {
    padding-top: calc(var(--hh) + var(--gap));
    padding-bottom: calc(var(--fh) + 20px);
    min-height: 100vh;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: var(--gap);
    padding: var(--gap);
}

.card {
    position: relative;
    height: 185px;
    overflow: hidden;
    cursor: pointer;
    background: var(--surface);
    border-radius: var(--radius);
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--trans), filter var(--trans), opacity var(--trans);
    filter: sepia(20%) brightness(.92);
    opacity: 0;
}
.card img.loaded { opacity: 1; }
.card:hover img {
    transform: scale(1.05);
    filter: sepia(6%) brightness(1.04);
}

.card-label {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,.72) 60%);
    padding: 26px 9px 8px;
    font-size: .72rem;
    color: var(--white);
    line-height: 1.3;
    font-family: system-ui, sans-serif;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    opacity: 0;
    transform: translateY(4px);
    transition: opacity var(--trans), transform var(--trans);
}
.card:hover .card-label {
    opacity: 1;
    transform: translateY(0);
}

/* empty state */
.empty-msg {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-dim);
    font-family: system-ui, sans-serif;
    font-size: .9rem;
}

/* ----------------------------------------------------------------
   LOADING SPINNER
   ---------------------------------------------------------------- */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 36px;
    color: var(--text-dim);
    font-family: system-ui, sans-serif;
    font-size: .85rem;
}
.loading[hidden] { display: none; }

.spinner {
    display: inline-block;
    width: 18px; height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--gold-dim);
    border-radius: 50%;
    animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

#sentinel { height: 1px; }

/* ----------------------------------------------------------------
   LIGHTBOX
   ---------------------------------------------------------------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: flex;
    flex-direction: column;
}
.lightbox[hidden] { display: none; }

.lb-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,.93);
    cursor: pointer;
}

.lb-shell {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

/* toolbar */
.lb-toolbar {
    display: flex;
    align-items: center;
    padding: 10px 14px;
    flex-shrink: 0;
    gap: 8px;
}

.lb-counter {
    color: var(--text-dim);
    font-family: system-ui, sans-serif;
    font-size: .8rem;
    letter-spacing: .04em;
}

.lb-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.lb-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.14);
    color: var(--text);
    border-radius: var(--radius);
    padding: 5px 12px;
    cursor: pointer;
    font-family: system-ui, sans-serif;
    font-size: .78rem;
    letter-spacing: .03em;
    transition: background var(--trans), border-color var(--trans), color var(--trans);
    white-space: nowrap;
}
.lb-btn:hover {
    background: rgba(255,255,255,.14);
    border-color: var(--gold-dim);
    color: var(--gold);
}
.lb-btn.active {
    background: rgba(201,168,108,.2);
    border-color: var(--gold);
    color: var(--gold);
}
.lb-btn:disabled {
    opacity: .3;
    pointer-events: none;
}
.lb-btn-icon { padding: 5px 8px; }

/* stage */
.lb-stage {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: default;
}

#lbImg {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    transform-origin: center center;
    transition: opacity .2s;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

/* nav arrows */
.lb-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.14);
    color: rgba(255,255,255,.8);
    font-size: 2.6rem;
    line-height: 1;
    width: 46px;
    height: 80px;
    border-radius: var(--radius);
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--trans), color var(--trans);
}
.lb-nav:hover {
    background: rgba(255,255,255,.18);
    color: #fff;
}
.lb-nav[hidden] { display: none; }
.lb-nav.prev { left: 14px; }
.lb-nav.next { right: 14px; }

/* caption */
.lb-caption {
    padding: 10px 60px 12px;
    flex-shrink: 0;
    background: rgba(0,0,0,.5);
    border-top: 1px solid rgba(255,255,255,.06);
}

.lb-title {
    display: block;
    font-size: .95rem;
    color: var(--gold);
    margin-bottom: 4px;
    line-height: 1.35;
}

.lb-meta {
    display: block;
    font-family: system-ui, sans-serif;
    font-size: .74rem;
    color: var(--text-dim);
    margin-bottom: 3px;
}

.lb-desc {
    display: block;
    font-size: .82rem;
    color: var(--text);
    font-style: italic;
    line-height: 1.45;
    margin-top: 4px;
}

/* ----------------------------------------------------------------
   FOOTER
   ---------------------------------------------------------------- */
footer {
    position: fixed;
    inset: auto 0 0 0;
    height: var(--fh);
    background: rgba(14, 13, 11, 0.97);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0 18px;
    z-index: 200;
    font-family: system-ui, sans-serif;
    font-size: .73rem;
    color: var(--text-dim);
}

.ft-logos {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.ft-logos img { height: 26px; width: auto; opacity: .55; }

footer p { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--gold); }

/* ----------------------------------------------------------------
   RESPONSIVE
   ---------------------------------------------------------------- */
@media (max-width: 800px) {
    :root { --hh: 96px; }

    #header {
        flex-wrap: wrap;
        height: var(--hh);
        padding: 8px 12px;
        gap: 4px;
        align-content: space-between;
    }

    .hd-logos { display: none; }

    /* Ligne 1 : titre, avec réserve à droite pour le ⓘ absolu */
    .hd-title {
        order: 1;
        flex: 1;
        text-align: left;
        padding-right: 44px;
    }
    .hd-title h1 { font-size: .92rem; }

    /* ⓘ ancré en haut à droite du header (hors flux) */
    .btn-info {
        position: absolute;
        top: 14px;
        right: 12px;
    }

    /* Ligne 2 : barre de recherche pleine largeur */
    .hd-controls {
        order: 2;
        width: 100%;
    }
    .search-wrap { flex: 1; }
    #searchInput { width: 100%; }

    .gallery { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
    .card { height: 145px; }

    .lb-nav { display: none; }
    .lb-caption { padding: 8px 14px 10px; }
}

@media (max-width: 480px) {
    .gallery { grid-template-columns: repeat(2, 1fr); }
    .hd-sub { display: none; }
    .ft-logos { display: none; }
}