/* Médiathèque : grille de vignettes puis diaporama plein écran. Chargé uniquement sur /mediatheque. */

.media-section { padding-top: 1rem; }

/* --- Filtres ------------------------------------------------------------------------------------ */
.media-filters { display: grid; gap: .7rem; justify-items: center; margin-bottom: 2rem; }
.chip-row { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; }
.chip {
    display: inline-flex; align-items: center; padding: .42rem 1.05rem; border-radius: 999px;
    border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-text);
    font-size: .93rem; font-weight: 600; text-decoration: none; transition: background .15s, color .15s, border-color .15s, transform .15s;
}
.chip:hover { border-color: var(--c-primary); color: var(--c-primary-dark); transform: translateY(-1px); }
.chip[aria-current] { background: var(--c-primary); border-color: var(--c-primary); color: var(--c-bg); }
.chip-alt { font-weight: 500; font-size: .88rem; }
.chip-alt[aria-current] { background: var(--c-accent); border-color: var(--c-accent); color: #fff; }

.media-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1.4rem; }
.media-count { margin: 0; color: var(--c-muted); font-weight: 600; font-size: .95rem; }
.media-toolbar .btn { display: inline-flex; align-items: center; gap: .5rem; }
.media-toolbar .btn[hidden] { display: none; }

/* --- Grille ------------------------------------------------------------------------------------- */
.media-grid {
    list-style: none; margin: 0; padding: 0;
    display: grid; gap: 1.1rem; grid-auto-flow: dense;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
}
.media-item { min-width: 0; }
.media-tile {
    position: relative; display: block; aspect-ratio: 4 / 3; height: 100%; overflow: hidden;
    border-radius: 18px; background: var(--c-tint); color: #fff; text-decoration: none;
    box-shadow: var(--shadow); isolation: isolate;
    transition: transform .25s ease, box-shadow .25s ease;
}
.media-tile img, .media-blank { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.2, .7, .2, 1); }
.media-blank { background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary)); }
.media-tile::after {
    content: ""; position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(to top, rgb(6 14 12 / .78) 0%, rgb(6 14 12 / .2) 42%, transparent 65%);
    opacity: .9; transition: opacity .25s;
}
.media-tile:hover, .media-tile:focus-visible { transform: translateY(-4px); box-shadow: 0 18px 40px -18px rgb(0 0 0 / .55); }
.media-tile:hover img { transform: scale(1.06); }
.media-tile:hover::after { opacity: 1; }
.media-cap { position: absolute; z-index: 2; left: 0; right: 0; bottom: 0; display: grid; gap: .15rem; padding: 2.4rem 1.1rem 1rem; }
.media-cap strong { font-family: var(--font-head); font-size: 1.05rem; line-height: 1.25; text-shadow: 0 1px 8px rgb(0 0 0 / .5); }
.media-cap small { font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; opacity: .85; }
.media-badge {
    position: absolute; z-index: 2; top: .8rem; left: .8rem; padding: .22rem .65rem; border-radius: 999px;
    background: rgb(6 14 12 / .6); backdrop-filter: blur(6px); font-size: .74rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
}
.media-play {
    position: absolute; z-index: 2; inset: 0; margin: auto; width: 3.6rem; height: 3.6rem; display: grid; place-items: center;
    border-radius: 50%; background: rgb(255 255 255 / .92); color: var(--c-primary-dark); box-shadow: 0 8px 24px rgb(0 0 0 / .35);
    transition: transform .25s;
}
.media-play svg { margin-left: 3px; }
.media-tile:hover .media-play { transform: scale(1.1); }

/* Première image mise en avant sur les grands écrans (page 1 sans filtre). */
@media (min-width: 900px) {
    .media-item.is-featured { grid-column: span 2; grid-row: span 2; }
    .media-item.is-featured .media-tile { aspect-ratio: auto; min-height: 100%; }
    .media-item.is-featured .media-cap strong { font-size: 1.4rem; }
}
@media (max-width: 480px) { .media-grid { grid-template-columns: 1fr; } }

/* --- Diaporama ---------------------------------------------------------------------------------- */
.lightbox {
    position: fixed; inset: 0; width: 100vw; height: 100dvh; max-width: none; max-height: none; margin: 0; padding: 0; border: 0;
    color: #f2f6f4; background: radial-gradient(circle at 50% 30%, #12211d 0%, #060c0a 75%);
}
.lightbox[open] { display: grid; grid-template-columns: 4.5rem minmax(0, 1fr) 4.5rem; grid-template-rows: auto minmax(0, 1fr) auto auto; animation: lb-in .25s ease; }
.lightbox::backdrop { background: #060c0a; }
@keyframes lb-in { from { opacity: 0; } to { opacity: 1; } }

.lb-top { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; padding: .8rem 1.2rem; }
.lb-count { font-size: .9rem; font-weight: 600; letter-spacing: .08em; color: rgb(242 246 244 / .75); font-variant-numeric: tabular-nums; }
.lb-tools { display: flex; gap: .4rem; }
.lb-btn, .lb-nav {
    display: inline-grid; place-items: center; border: 0; cursor: pointer; color: #f2f6f4; text-decoration: none;
    background: rgb(255 255 255 / .1); transition: background .15s, transform .15s;
}
.lb-btn { width: 2.6rem; height: 2.6rem; border-radius: 12px; }
.lb-btn[hidden] { display: none; }
.lb-btn:hover, .lb-nav:hover { background: rgb(255 255 255 / .22); color: #fff; }
.lb-btn:focus-visible, .lb-nav:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; }
.lb-btn .i-pause { display: none; }
.lb-btn[aria-pressed="true"] .i-play { display: none; }
.lb-btn[aria-pressed="true"] .i-pause { display: block; }
.lb-btn[aria-pressed="true"] { background: var(--c-accent); }

.lb-nav { align-self: center; justify-self: center; width: 3rem; height: 3rem; border-radius: 50%; }
.lb-prev { grid-column: 1; grid-row: 2; }
.lb-next { grid-column: 3; grid-row: 2; }
.lb-nav:hover { transform: scale(1.08); }

.lb-stage { grid-column: 2; grid-row: 2; min-width: 0; min-height: 0; display: flex; align-items: center; justify-content: center; overflow: hidden; touch-action: pan-y; }
.lb-stage img, .lb-stage video {
    max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; border-radius: 10px; background: #000;
    box-shadow: 0 30px 80px -30px rgb(0 0 0 / .8);
}

/* Transitions : l'effet d'entrée est tiré au hasard par js/mediatheque.js (data-fx) ; --dir vaut 1 (suivant) ou -1 (précédent). */
.lb-stage { perspective: 1400px; }
.lb-stage [data-fx] { animation-duration: .75s; animation-timing-function: cubic-bezier(.22, .8, .25, 1); animation-fill-mode: both; }
.lb-stage [data-fx="fade"] { animation-name: fx-fade; animation-duration: .6s; }
.lb-stage [data-fx="slide"] { animation-name: fx-slide; }
.lb-stage [data-fx="zoom-in"] { animation-name: fx-zoom-in; }
.lb-stage [data-fx="zoom-out"] { animation-name: fx-zoom-out; }
.lb-stage [data-fx="rise"] { animation-name: fx-rise; }
.lb-stage [data-fx="flip"] { animation-name: fx-flip; animation-duration: .9s; }
.lb-stage [data-fx="blur"] { animation-name: fx-blur; animation-duration: .9s; }
.lb-stage [data-fx="swing"] { animation-name: fx-swing; animation-duration: .9s; }
@keyframes fx-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes fx-slide { from { opacity: 0; transform: translateX(calc(var(--dir, 1) * 12%)); } to { opacity: 1; transform: none; } }
@keyframes fx-zoom-in { from { opacity: 0; transform: scale(.82); } to { opacity: 1; transform: none; } }
@keyframes fx-zoom-out { from { opacity: 0; transform: scale(1.22); } to { opacity: 1; transform: none; } }
@keyframes fx-rise { from { opacity: 0; transform: translateY(9%); } to { opacity: 1; transform: none; } }
@keyframes fx-flip { from { opacity: 0; transform: rotateY(calc(var(--dir, 1) * 75deg)) scale(.92); } to { opacity: 1; transform: none; } }
@keyframes fx-blur { from { opacity: 0; filter: blur(22px); transform: scale(1.06); } to { opacity: 1; filter: blur(0); transform: none; } }
@keyframes fx-swing { from { opacity: 0; transform: rotate(calc(var(--dir, 1) * 6deg)) translateX(calc(var(--dir, 1) * 6%)) scale(.88); } to { opacity: 1; transform: none; } }

.lb-info { grid-column: 2; grid-row: 3; text-align: center; padding: .9rem .5rem .4rem; max-width: 60rem; margin-inline: auto; }
.lb-title { margin: 0; font-size: 1.25rem; color: #fff; }
.lb-caption { margin: .35rem 0 0; color: rgb(242 246 244 / .85); line-height: 1.5; }
.lb-caption:empty, .lb-meta:empty { display: none; }
.lb-meta { margin: .4rem 0 0; font-size: .82rem; letter-spacing: .05em; text-transform: uppercase; color: rgb(242 246 244 / .55); }

.lb-thumbs { grid-column: 1 / -1; grid-row: 4; display: flex; gap: .5rem; overflow-x: auto; padding: .7rem 1.2rem 1rem; justify-content: safe center; scrollbar-width: thin; }
.lb-thumb { flex: 0 0 auto; width: 4.6rem; height: 3.4rem; padding: 0; border: 2px solid transparent; border-radius: 8px; overflow: hidden; cursor: pointer; opacity: .55; background: #1b2b26; transition: opacity .15s, border-color .15s; }
.lb-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.lb-thumb:hover { opacity: .9; }
.lb-thumb[aria-current="true"] { opacity: 1; border-color: var(--c-accent); }
.lb-thumb:focus-visible { outline: 3px solid var(--c-accent); outline-offset: 2px; }

/* Barre de progression du diaporama automatique. */
.lb-progress { position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: var(--c-accent); }
.lb-progress.is-running { width: 100%; transition: width var(--lb-duration, 5s) linear; }

@media (max-width: 720px) {
    .lightbox[open] { grid-template-columns: 0 minmax(0, 1fr) 0; }
    .lb-nav { position: absolute; top: 45%; z-index: 3; width: 2.6rem; height: 2.6rem; background: rgb(6 14 12 / .55); }
    .lb-prev { left: .5rem; }
    .lb-next { right: .5rem; }
    .lb-stage { padding-inline: .5rem; }
    .lb-thumbs { display: none; }
}
@media (prefers-reduced-motion: reduce) {
    .media-tile, .media-tile img, .media-play, .chip { transition: none; }
    .lightbox[open], .lb-stage [data-fx] { animation: none; }
    .lb-progress.is-running { transition: none; }
}

.lb-open { overflow: hidden; }
.lb-nav[hidden], .lb-thumbs[hidden] { display: none; }