/* Viewer.css */

.viewer-page {
  margin: 0;
  min-height: 100svh;
  background: #171514;
  color: #eee8df;
}

.viewer {
  --viewer-ui-duration: 180ms;

  min-height: 100svh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  position: relative;
  overflow: hidden;
}

.viewer-toolbar,
.viewer-controls {
  position: relative;
  z-index: 5;
  padding: 0.75rem 1rem;
  background: rgb(23 21 20 / 94%);
  transition:
    opacity var(--viewer-ui-duration) ease,
    visibility var(--viewer-ui-duration) ease;
}

.viewer-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.viewer-heading h1 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.viewer-heading p {
  margin: 0.3rem 0 0;
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.viewer-actions,
.viewer-navigation,
.viewer-page-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.viewer button {
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid rgb(238 232 223 / 30%);
  border-radius: 0.2rem;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.viewer button:focus-visible,
.viewer input:focus-visible {
  outline: 2px solid #c7a66a;
  outline-offset: 3px;
}

.viewer button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.viewer-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 0;
  overflow: hidden;
  touch-action: pan-y;
}

.viewer-image-frame {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#manga-image {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.viewer-image-frame.is-transitioning {
  pointer-events: none;
}

.viewer-image-frame.is-exit {
  animation: viewer-page-exit 180ms ease both;
}

.viewer-image-frame.is-enter {
  animation: viewer-page-enter 180ms ease both;
}

@keyframes viewer-page-exit {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(12%);
    opacity: 0;
  }
}

@keyframes viewer-page-enter {
  from {
    transform: translateX(-12%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.page-hit-area {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 2;
  width: 18%;
  min-height: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  opacity: 0;
}

.page-hit-area:hover,
.page-hit-area:focus-visible {
  opacity: 0.65;
}

.page-hit-area--previous {
  right: 0;
}

.page-hit-area--next {
  left: 0;
}

.viewer-error {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  background: #171514;
  text-align: center;
}

.viewer-error[hidden],
.viewer-feedback[hidden],
.viewer-toolbar[hidden],
.viewer-controls[hidden] {
  display: none;
}

.viewer-feedback {
  position: absolute;
  z-index: 6;
  left: 50%;
  bottom: 1rem;
  transform: translateX(-50%);
  max-width: calc(100% - 2rem);
  padding: 0.75rem 1rem;
  background: rgb(0 0 0 / 80%);
  text-align: center;
}

.viewer-page-navigation input[type="range"] {
  width: min(35vw, 20rem);
  accent-color: #c7a66a;
}

.viewer.is-ui-hidden .viewer-toolbar,
.viewer.is-ui-hidden .viewer-controls {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

@media (max-width: 640px) {
  .viewer-toolbar {
    align-items: flex-start;
    padding: 0.65rem;
  }

  .viewer-heading h1 {
    font-size: 0.9rem;
  }

  .viewer-actions,
  .viewer-navigation,
  .viewer-page-navigation {
    gap: 0.25rem;
  }

  .viewer button {
    min-height: 2.25rem;
    padding: 0.4rem 0.5rem;
    font-size: 0.8rem;
  }

  .viewer-controls {
    padding: 0.65rem;
  }

  .viewer-navigation {
    flex-wrap: wrap;
  }

  .viewer-page-navigation input[type="range"] {
    width: 25vw;
  }

  .page-hit-area {
    width: 22%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .viewer-toolbar,
  .viewer-controls {
    transition: none;
  }

  .viewer-image-frame.is-transitioning,
  .viewer-image-frame.is-exit,
  .viewer-image-frame.is-enter {
    animation: none;
  }
}


/* 漫画Viewer：右端を1ページ目、左端を最終ページにする */
#page-slider {
  direction: rtl;
}