/* Load after the A4 content stylesheet. This file scales the paper, not its contents. */
:root {
  --viewer-paper-width: 210mm;
  --viewer-paper-height: 297mm;
  --viewer-scale: 1;
  --viewer-gutter: 18px;
  --viewer-page-gap: 26px;
  --viewer-toolbar-offset: 88px;
}

html { scroll-padding-top: var(--viewer-toolbar-offset); }
body { margin: 0; }
.toolbar, .viewer-toolbar {
  position: sticky;
  top: 0;
  left: 0;
  z-index: 100;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  width: 100vw;
  max-width: 100vw;
  min-height: 56px;
  padding: 9px 14px;
  border-bottom: 1px solid #d9dedf;
  background: rgba(255, 253, 248, .98);
  color: #243a54;
  font-family: "Noto Sans JP", "Yu Gothic", Meiryo, sans-serif;
  font-size: 12px;
  line-height: 1.5;
  box-shadow: 0 2px 12px rgba(29, 42, 52, .05);
}
.toolbar a, .viewer-toolbar a { color: #31597d; text-underline-offset: 3px; }
.viewer-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
}
.toolbar button, .viewer-toolbar button {
  box-sizing: border-box;
  min-width: 42px;
  min-height: 40px;
  padding: 7px 11px;
  border: 1px solid #cbd4dc;
  border-radius: 5px;
  background: #fffefa;
  color: #243e5a;
  font: inherit;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
}
.toolbar button:hover, .viewer-toolbar button:hover { background: #eef3f7; }
.toolbar button[aria-pressed="true"], .viewer-toolbar button[aria-pressed="true"] {
  border-color: #244b72;
  background: #244b72;
  color: #fff;
}
.toolbar button:disabled, .viewer-toolbar button:disabled { opacity: .48; cursor: default; }
.toolbar a:focus-visible, .toolbar button:focus-visible,
.viewer-toolbar a:focus-visible, .viewer-toolbar button:focus-visible {
  outline: 3px solid #a7763e;
  outline-offset: 3px;
}
[data-viewer-scale] { display: inline-block; min-width: 4em; text-align: center; font-variant-numeric: tabular-nums; }
.viewer-page-status { white-space: nowrap; color: #617184; font-variant-numeric: tabular-nums; }
[data-viewer-status]:empty { display: none; }
[data-viewer-status]:not(:empty) { flex-basis: 100%; margin: 0; color: #7d5735; text-align: center; }

@media screen {
  body { background: #e9ebe9; }
  .reader-heading {
    box-sizing: border-box;
    width: min(794px, 100vw);
    max-width: 100vw;
    margin: 0 auto;
    padding: 22px var(--viewer-gutter) 18px;
  }
  .book {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--viewer-page-gap);
    width: max-content;
    min-width: 100%;
    max-width: none;
    margin: 0;
    padding: 0 var(--viewer-gutter) 40px;
    touch-action: auto;
  }
  .book .sheet {
    box-sizing: border-box;
    flex-shrink: 0;
    width: var(--viewer-paper-width);
    min-width: var(--viewer-paper-width);
    max-width: var(--viewer-paper-width);
    height: var(--viewer-paper-height);
    min-height: var(--viewer-paper-height);
    max-height: var(--viewer-paper-height);
    margin: 0;
  }
  .page-frame {
    position: relative;
    box-sizing: content-box;
    flex: 0 0 auto;
    width: calc(var(--viewer-paper-width) * var(--viewer-scale));
    height: calc(var(--viewer-paper-height) * var(--viewer-scale));
    margin: 0;
    padding: 0;
    border: 0;
    scroll-margin-top: var(--viewer-toolbar-offset);
  }
  .page-frame > .sheet {
    position: absolute;
    top: 0;
    left: 0;
    transform: scale(var(--viewer-scale));
    transform-origin: top left;
  }
  .viewer-no-js { max-width: min(44rem, calc(100vw - 36px)); margin: 1rem auto; color: #5d6c7d; }
}

@media screen and (max-width: 600px) {
  :root { --viewer-gutter: 10px; --viewer-page-gap: 18px; }
  .toolbar, .viewer-toolbar { gap: 6px 11px; padding: 8px 10px; font-size: 11px; }
  .viewer-controls { gap: 5px; }
  .toolbar button, .viewer-toolbar button { min-height: 40px; padding: 7px 9px; }
  .reader-heading { padding-top: 18px; padding-bottom: 15px; }
}

@page { size: A4 portrait; margin: 0; }
@media print {
  html { scroll-padding: 0; }
  body { margin: 0; padding: 0; background: #fff; }
  .toolbar, .viewer-toolbar, .reader-heading, .screen-only,
  .viewer-no-js, .back-to-contents, .skip-link { display: none !important; }
  .book {
    display: block;
    width: 210mm;
    min-width: 0;
    max-width: none;
    margin: 0;
    padding: 0;
  }
  .page-frame {
    position: relative;
    display: block;
    box-sizing: border-box;
    width: 210mm;
    height: 297mm;
    min-height: 297mm;
    margin: 0;
    padding: 0;
    border: 0;
    transform: none;
    break-after: page;
    page-break-after: always;
    break-inside: avoid;
    page-break-inside: avoid;
  }
  .book .sheet, .page-frame > .sheet {
    position: relative;
    top: auto;
    left: auto;
    box-sizing: border-box;
    width: 210mm;
    min-width: 210mm;
    max-width: 210mm;
    height: 297mm;
    min-height: 297mm;
    max-height: 297mm;
    margin: 0;
    transform: none;
    transform-origin: initial;
    box-shadow: none;
    break-after: page;
    page-break-after: always;
  }
  .page-frame:last-child, .page-frame:last-child > .sheet,
  .book > .sheet:last-child { break-after: auto; page-break-after: auto; }
}