/* gallery.css — phần đặc thù của module "gallery" (thư viện ảnh và video).
   Các lớp nền (mt-card, mt-grid, mt-filter, mt-badge, mt-empty, mt-btn, ...) do hệ thiết kế của theme định nghĩa (docs/architecture.md mục 8.3);
   tệp này chỉ bổ sung bố cục của các lớp mt-gallery-* và, trong phạm vi .mt-gallery / .mt-lightbox--gallery, bố cục lưới ảnh, video và lightbox
   để module hiển thị đúng cả khi theme đang dùng chưa định nghĩa các thành phần đó (vd. theme mặc định của lõi trên site sandbox).
   Dùng token --mt-* (có giá trị dự phòng để không vỡ khi theme chưa nạp token). Không URL ngoài, không @import. */

/* ---------- Khung chung ---------- */
.mt-gallery {
  min-width: 0;
}

.mt-gallery__intro {
  margin: 0 0 1em;
  color: var(--mt-text-muted, #576F8F);
}

.mt-gallery__head {
  margin-bottom: 0.5em;
}

.mt-gallery__badges {
  margin: 0 0 0.5em;
}

.mt-gallery__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25em 0;
  margin: 0.5em 0 0;
}

.mt-gallery__meta-item + .mt-gallery__meta-item::before {
  content: "\00b7";
  margin: 0 0.5em;
}

.mt-gallery__description {
  max-width: 48em;
}

.mt-gallery__source a,
.mt-gallery__legacy a {
  text-decoration: underline;
}

.mt-gallery__source,
.mt-gallery__legacy {
  margin: 0;
  color: var(--mt-text-muted, #576F8F);
}

.mt-gallery__back {
  margin: 1em 0 0;
}

.mt-gallery__pagination {
  margin-top: 1.5em;
}

.mt-gallery__pagination ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.375em;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mt-gallery__pagination li > a,
.mt-gallery__pagination li > span {
  display: inline-block;
  min-width: 2.5em;
  padding: 0.5em 0.75em;
  border: 1px solid var(--mt-border-strong, #667E9E);
  border-radius: 0.5em;
  background: var(--mt-bg-card, #FFFFFF);
  color: var(--mt-primary, #0D46A6);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
}

.mt-gallery__pagination li.active > a,
.mt-gallery__pagination li.active > span {
  border-color: var(--mt-primary, #0D46A6);
  background: var(--mt-primary, #0D46A6);
  color: var(--mt-on-primary, #FFFFFF);
}

.mt-gallery__pagination li.disabled > a,
.mt-gallery__pagination li.disabled > span {
  color: var(--mt-text-muted, #576F8F);
}

/* ---------- Bộ lọc ---------- */
.mt-gallery-filter {
  margin: 0 0 1.5em;
}

.mt-gallery-filter .mt-filter__row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75em 1em;
}

.mt-gallery-filter .mt-filter__field {
  display: flex;
  flex: 1 1 11em;
  flex-direction: column;
  gap: 0.25em;
  min-width: 0;
}

.mt-gallery-filter .mt-filter__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
}

.mt-gallery-filter .mt-input,
.mt-gallery-filter .mt-select {
  box-sizing: border-box;
  width: 100%;
  min-height: 2.75em;
  padding: 0.375em 0.625em;
}

/* ---------- Lưới album ---------- */
.mt-gallery-albums {
  display: grid;
  gap: 1.25em;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 15em), 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.mt-gallery-albums__item {
  min-width: 0;
}

.mt-gallery-card {
  position: relative;
  display: flex;
  height: 100%;
  flex-direction: column;
  border: 1px solid var(--mt-border, #C9D2DD);
  border-radius: 0.5em;
  background: var(--mt-bg-card, #FFFFFF);
  overflow: hidden;
}

.mt-gallery-card__media {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--mt-bg-tint, #E0F3FB);
  overflow: hidden;
}

.mt-gallery-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mt-gallery-card__placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, var(--mt-primary-strong, #082D7F), var(--mt-primary, #0D46A6));
  opacity: 0.12;
}

.mt-gallery-card .mt-card__body {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  gap: 0.375em;
  padding: 0.875em 1em 1em;
}

.mt-gallery-card__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375em;
  margin: 0;
}

.mt-gallery-card .mt-card__title {
  margin: 0;
  font-size: 1.0625em;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

/* Liên kết "bao phủ thẻ": cả thẻ bấm được nhưng chỉ có MỘT liên kết cho trình đọc màn hình */
.mt-gallery-card__link::after {
  content: "";
  position: absolute;
  inset: 0;
}

.mt-gallery-card:focus-within {
  outline: 3px solid var(--mt-focus, #082D7F);
  outline-offset: 2px;
}

.mt-gallery-card__link:focus {
  outline: none;
}

.mt-gallery-card__meta,
.mt-gallery-card__counts {
  margin: 0;
  color: var(--mt-text-muted, #576F8F);
  font-size: 0.9375em;
}

@media (prefers-reduced-motion: no-preference) {
  .mt-gallery-card {
    transition: box-shadow 0.2s ease;
  }

  .mt-gallery-card:hover {
    box-shadow: 0 4px 16px rgba(8, 45, 127, 0.18);
  }
}

.mt-gallery-block__more {
  margin: 0.75em 0 0;
}

/* ---------- Lưới ảnh của album ---------- */
.mt-gallery .mt-gallery-grid {
  display: grid;
  gap: 0.75em;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 10em), 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.mt-gallery .mt-gallery-grid__item {
  position: relative;
  margin: 0;
  min-width: 0;
  overflow: hidden;
  border-radius: 0.5em;
  background: var(--mt-bg-tint, #E0F3FB);
}

.mt-gallery .mt-gallery-grid__item a {
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  cursor: zoom-in;
}

.mt-gallery .mt-gallery-grid__item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mt-gallery .mt-gallery-grid__item a:focus-visible {
  outline: 3px solid var(--mt-focus, #082D7F);
  outline-offset: -3px;
}

/* Chú thích nằm DƯỚI ảnh (ghi đè kiểu phủ lên ảnh của theme để chú thích dài vẫn đọc được) */
.mt-gallery .mt-gallery-grid__caption {
  position: static;
  display: -webkit-box;
  margin: 0;
  padding: 0.375em 0.5em 0.5em;
  background: none;
  color: var(--mt-text, #1E2C58);
  font-size: 0.8125em;
  line-height: 1.35;
  overflow: hidden;
  overflow-wrap: anywhere;
  pointer-events: auto;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-clamp: 2;
}

@media (prefers-reduced-motion: no-preference) {
  .mt-gallery .mt-gallery-grid__item img {
    transition: transform 0.35s ease;
  }

  .mt-gallery .mt-gallery-grid__item a:hover img {
    transform: scale(1.05);
  }
}

/* ---------- Video ---------- */
.mt-gallery-videos {
  display: grid;
  gap: 1.5em;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 20em), 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.mt-gallery-videos__item {
  min-width: 0;
}

.mt-gallery-video {
  margin: 0;
}

.mt-gallery-video__caption a {
  text-decoration: underline;
}

.mt-gallery-video__caption {
  padding-top: 0.5em;
  color: var(--mt-text-muted, #576F8F);
  font-size: 0.9375em;
  overflow-wrap: anywhere;
}

.mt-gallery .mt-video {
  position: relative;
  aspect-ratio: 16 / 9;
  margin: 0;
  overflow: hidden;
  border-radius: 0.5em;
  background: var(--mt-primary-strong, #082D7F);
}

.mt-gallery .mt-video video,
.mt-gallery .mt-video iframe,
.mt-gallery .mt-video .mt-video__el {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #000;
  object-fit: contain;
}

.mt-gallery .mt-video .mt-video__play {
  position: absolute;
  inset: 0;
  display: grid;
  width: 100%;
  place-items: center;
  padding: 0;
  border: 0;
  background: linear-gradient(140deg, var(--mt-primary-strong, #082D7F), var(--mt-primary, #0D46A6));
  color: #FFFFFF;
  text-decoration: none;
  cursor: pointer;
}

.mt-gallery .mt-video .mt-video__poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.mt-gallery .mt-video .mt-video__icon {
  position: relative;
  display: grid;
  width: 4em;
  height: 4em;
  place-items: center;
  border-radius: 50%;
  background: var(--mt-accent, #FAD233);
  color: var(--mt-on-accent, #1E2C58);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

.mt-gallery .mt-video .mt-video__label {
  position: absolute;
  right: 1em;
  bottom: 0.75em;
  left: 1em;
  color: #FFFFFF;
  font-weight: 600;
  text-align: left;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.7);
  overflow-wrap: anywhere;
}

.mt-gallery .mt-video .mt-video__play:focus-visible {
  outline: 3px solid var(--mt-accent, #FAD233);
  outline-offset: -5px;
}

@media (prefers-reduced-motion: no-preference) {
  .mt-gallery .mt-video .mt-video__icon {
    transition: transform 0.2s ease;
  }

  .mt-gallery .mt-video .mt-video__play:hover .mt-video__icon {
    transform: scale(1.08);
  }
}

/* ---------- Lightbox (js/gallery.js dựng; chỉ hiện khi có JS) ---------- */
html.mt-gallery-lb-open {
  overflow: hidden;
}

.mt-lightbox.mt-lightbox--gallery {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 3.5em 0.75em 0.75em;
  background: rgba(4, 14, 44, 0.94);
  color: #FFFFFF;
}

.mt-lightbox--gallery .mt-lightbox__figure {
  display: flex;
  max-width: 100%;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75em;
  margin: 0;
  touch-action: pan-y pinch-zoom;
}

.mt-lightbox--gallery .mt-lightbox__img {
  display: block;
  max-width: 100%;
  min-height: 0;
  max-height: calc(100vh - 11em);
  max-height: calc(100dvh - 11em);
  object-fit: contain;
  border-radius: 0.25em;
  background: rgba(255, 255, 255, 0.06);
}

.mt-lightbox--gallery .mt-lightbox__caption {
  max-width: 52em;
  margin: 0;
  padding: 0 3.5em;
  color: #FFFFFF;
  font-size: 0.9375em;
  line-height: 1.4;
  text-align: center;
  overflow-wrap: anywhere;
}

.mt-lightbox--gallery .mt-lightbox__error {
  margin: 0;
  color: #FFFFFF;
}

.mt-lightbox--gallery .mt-lightbox__counter {
  position: absolute;
  top: 1.25em;
  left: 1em;
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9375em;
}

.mt-lightbox--gallery .mt-lightbox__original {
  color: #FFFFFF;
  font-size: 0.9375em;
  text-decoration: underline;
}

.mt-lightbox--gallery .mt-lightbox__btn {
  position: absolute;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  padding: 0;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  background: rgba(6, 22, 66, 0.75);
  color: #FFFFFF;
  cursor: pointer;
}

.mt-lightbox--gallery .mt-lightbox__btn:hover,
.mt-lightbox--gallery .mt-lightbox__btn:focus {
  border-color: var(--mt-accent, #FAD233);
  background: var(--mt-accent, #FAD233);
  color: var(--mt-on-accent, #1E2C58);
}

.mt-lightbox--gallery .mt-lightbox__btn:focus-visible,
.mt-lightbox--gallery .mt-lightbox__original:focus-visible {
  outline: 3px solid #FFFFFF;
  outline-offset: 2px;
}

.mt-lightbox--gallery .mt-lightbox__btn--close {
  top: 0.75em;
  right: 0.75em;
}

.mt-lightbox--gallery .mt-lightbox__btn--prev,
.mt-lightbox--gallery .mt-lightbox__btn--next {
  top: 50%;
  margin-top: -24px;
}

.mt-lightbox--gallery .mt-lightbox__btn--prev {
  left: 0.5em;
}

.mt-lightbox--gallery .mt-lightbox__btn--next {
  right: 0.5em;
}

.mt-lightbox--gallery .mt-lightbox__btn svg {
  display: block;
  width: 24px;
  height: 24px;
}

.mt-lightbox--gallery [hidden] {
  display: none;
}

@media (max-width: 40em) {
  .mt-lightbox--gallery .mt-lightbox__caption {
    padding: 0 0.25em;
  }

  .mt-lightbox--gallery .mt-lightbox__btn--prev,
  .mt-lightbox--gallery .mt-lightbox__btn--next {
    top: auto;
    bottom: 0.75em;
    margin-top: 0;
  }

  .mt-lightbox--gallery .mt-lightbox__btn--prev {
    left: 0.75em;
  }

  .mt-lightbox--gallery .mt-lightbox__btn--next {
    right: 0.75em;
  }

  .mt-lightbox.mt-lightbox--gallery {
    padding-bottom: 4.5em;
  }

  .mt-lightbox--gallery .mt-lightbox__img {
    max-height: calc(100vh - 13em);
    max-height: calc(100dvh - 13em);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .mt-lightbox.mt-lightbox--gallery {
    animation: mt-gallery-lb-in 0.15s ease-out;
  }
}

@keyframes mt-gallery-lb-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@media print {
  .mt-lightbox.mt-lightbox--gallery,
  .mt-gallery-filter,
  .mt-gallery__pagination {
    display: none;
  }

  .mt-gallery a[href]::after {
    content: none;
  }

  .mt-gallery .mt-gallery-video__caption a[href^="http"]::after {
    content: " (" attr(href) ")";
  }

  .mt-video--youtube {
    display: none;
  }

  .mt-gallery-grid__item,
  .mt-gallery-card,
  .mt-gallery-video {
    break-inside: avoid;
  }
}

/* Chữ chỉ dành cho trình đọc màn hình (dự phòng khi theme chưa định nghĩa .mt-visually-hidden) */
.mt-gallery .mt-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}