body.preview-open {
  overflow: hidden;
}

.preview-modal[hidden] {
  display: none;
}

.preview-carousel[hidden],
.preview-empty[hidden] {
  display: none;
}

.preview-modal {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 18px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.18s ease, visibility 0.18s ease;
}

.preview-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.preview-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 10, 16, 0.62);
  backdrop-filter: blur(5px);
}

.preview-dialog {
  position: relative;
  display: grid;
  width: min(760px, calc(100vw - 36px));
  max-height: min(90dvh, 760px);
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
  border: 1px solid var(--surface-border);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(18px) saturate(125%);
  transform: translateY(12px) scale(0.985);
  transition: transform 0.22s cubic-bezier(0.2, 0.85, 0.25, 1);
}

.preview-modal.is-open .preview-dialog {
  transform: translateY(0) scale(1);
}

.preview-header {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 14px 10px 20px;
}

.preview-heading {
  min-width: 0;
}

.preview-heading strong,
.preview-heading small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-heading strong {
  color: var(--ink);
  font-size: 16px;
  line-height: 1.3;
}

.preview-heading small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11.5px;
}

.preview-close,
.preview-nav,
.preview-dot {
  border: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.preview-close {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: var(--ink);
  background: var(--control);
  font-size: 24px;
  transition: transform 0.18s ease, background 0.18s ease;
}

.preview-close:hover {
  background: var(--control-hover);
  transform: scale(1.05);
}

.preview-carousel {
  display: flex;
  min-height: 300px;
  align-items: center;
  gap: 14px;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 14px 24px;
  background: rgba(86, 121, 169, 0.075);
  scroll-behavior: smooth;
  scroll-padding-inline: 24px;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  overscroll-behavior-inline: contain;
  touch-action: pan-x pan-y;
}

.preview-carousel::-webkit-scrollbar {
  display: none;
}

.preview-slide {
  position: relative;
  display: grid;
  width: auto;
  height: min(58dvh, 520px);
  min-height: 280px;
  aspect-ratio: 858 / 1908;
  flex: 0 0 auto;
  place-items: center;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--item-border);
  border-radius: 20px;
  background: var(--control);
  box-shadow: 0 10px 24px var(--item-shadow);
  scroll-snap-align: center;
  scroll-snap-stop: always;
}

.preview-slide::before {
  width: 36px;
  height: 36px;
  border: 3px solid var(--soft-blue);
  border-top-color: var(--blue);
  border-radius: 50%;
  content: "";
  animation: preview-spin 0.8s linear infinite;
}

.preview-slide.is-loaded::before,
.preview-slide.is-error::before {
  display: none;
}

.preview-slide img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border-radius: inherit;
  object-fit: contain;
  opacity: 0;
  transform: scale(0.99);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.preview-slide.is-loaded img {
  opacity: 1;
  transform: scale(1);
}

.preview-slide.is-error::after {
  color: var(--muted);
  content: "Không tải được ảnh";
  font-size: 12px;
  font-weight: 700;
}

.preview-empty {
  display: grid;
  min-height: 300px;
  place-items: center;
  align-content: center;
  gap: 12px;
  color: var(--muted);
  background: rgba(86, 121, 169, 0.075);
}

.preview-empty p {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
}

.preview-loader {
  width: 34px;
  height: 34px;
  border: 3px solid var(--soft-blue);
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: preview-spin 0.8s linear infinite;
}

.preview-empty.is-empty .preview-loader {
  display: none;
}

.preview-controls {
  display: grid;
  min-height: 62px;
  grid-template-columns: 38px minmax(0, 1fr) auto 38px;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 10px 14px;
  color: var(--muted);
}

.preview-nav {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  color: var(--ink);
  background: var(--control);
  font-size: 25px;
  line-height: 1;
  transition: opacity 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.preview-nav:hover:not(:disabled) {
  background: var(--control-hover);
  transform: scale(1.05);
}

.preview-nav:disabled {
  opacity: 0.32;
  cursor: default;
}

.preview-dots {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.preview-dot {
  width: 7px;
  height: 7px;
  padding: 0;
  border-radius: 99px;
  background: var(--muted);
  opacity: 0.28;
  transition: width 0.2s ease, opacity 0.2s ease, background 0.2s ease;
}

.preview-dot.active {
  width: 20px;
  background: var(--blue);
  opacity: 1;
}

.preview-counter {
  min-width: 32px;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.preview-close:focus-visible,
.preview-nav:focus-visible,
.preview-dot:focus-visible,
.preview-carousel:focus-visible {
  outline: 3px solid rgba(52, 132, 244, 0.28);
  outline-offset: 2px;
}

@keyframes preview-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 600px) {
  .preview-modal {
    padding: 8px;
  }

  .preview-dialog {
    width: calc(100vw - 16px);
    max-height: 88dvh;
    border-radius: 23px;
  }

  .preview-header {
    min-height: 62px;
    padding: 10px 11px 8px 16px;
  }

  .preview-heading strong {
    font-size: 14px;
  }

  .preview-carousel {
    min-height: 260px;
    gap: 10px;
    padding: 10px 16px;
    scroll-padding-inline: 16px;
  }

  .preview-slide {
    height: min(54dvh, 470px);
    min-height: 240px;
    flex-basis: auto;
    border-radius: 17px;
  }

  .preview-controls {
    min-height: 54px;
    grid-template-columns: minmax(0, 1fr) auto;
    padding: 8px 16px 10px;
  }

  .preview-nav {
    display: none;
  }

  .preview-dots {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .preview-modal,
  .preview-dialog,
  .preview-slide img,
  .preview-dot,
  .preview-nav {
    animation: none !important;
    scroll-behavior: auto !important;
    transition: none !important;
  }
}