/* Book page editor: the site's palette (style.css), a bar on top, pages by part on the left, pages on the right.
   The window never scrolls as a whole: the list and the pages scroll inside, one page fits the window. */
html, body { height: 100%; }
body { padding: 0; display: flex; flex-direction: column; overflow: hidden; }
.bk-bar {
  flex: none; z-index: 5; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px;
  padding: 10px 70px 10px 16px; background: var(--container-bg); border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 5px var(--shadow-color); font-size: 14px;
}
.bk-bar h1 { font-size: 18px; font-weight: normal; margin: 0 6px 0 0; }
.bk-bar label { display: flex; align-items: center; gap: 6px; color: var(--meta-color); }
.bk-bar select { max-width: 260px; }
select, .bk-pages textarea {
  padding: 5px 7px; border: 1px solid var(--border-color); border-radius: 4px; background: var(--container-bg);
  color: var(--text-color); font: inherit;
}
.bk-back { color: var(--link); text-decoration: none; }
.bk-status { flex: 1; min-width: 160px; color: var(--meta-color); font-size: 13px; }
.bk-status .bad { color: var(--error-color); }
.bk-status .edited { color: var(--link); }
button { padding: 6px 12px; font-size: 14px; }
button.bk-light { background: var(--form-bg); color: var(--text-color); border: 1px solid var(--border-color); }
button.bk-light:hover { background: var(--bg-color); }
button:disabled { opacity: .5; cursor: default; }

.bk-layout { flex: 1; min-height: 0; display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.bk-toc {
  min-height: 0; overflow: auto; padding: 10px 12px 20px;
  border-right: 1px solid var(--border-color); background: var(--container-bg); font-size: 13px;
}
.bk-toc-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-bottom: 6px; }
.bk-toc-head label { color: var(--meta-color); white-space: nowrap; cursor: pointer; }
.bk-summary { color: var(--meta-color); margin-bottom: 8px; line-height: 1.5; }
.bk-summary .bad { color: var(--error-color); }
.bk-part { margin: 8px 0 4px; }
.bk-part-title { display: block; color: var(--text-color); font-weight: bold; margin-bottom: 4px; overflow-wrap: anywhere; }
.bk-part-title small { font-weight: normal; color: var(--meta-color); }
.bk-chips { display: flex; flex-wrap: wrap; gap: 3px; }
.bk-chip {
  min-width: 30px; padding: 2px 4px; border: 1px solid var(--border-color); border-radius: 3px; background: var(--form-bg);
  color: var(--text-color); font-size: 12px; text-align: center; cursor: pointer; line-height: 1.4;
}
.bk-chip:hover { border-color: var(--link); }
.bk-chip.bad { background: var(--error-bg); color: var(--error-color); border-color: var(--error-color); }
.bk-chip.empty { color: var(--meta-color); font-style: italic; }
.bk-chip.edited { box-shadow: inset 0 -3px 0 var(--button-bg); }
.bk-chip.current { outline: 2px solid var(--link); outline-offset: 1px; font-weight: bold; }

.bk-main { padding: 10px 16px 12px; min-width: 0; min-height: 0; overflow: auto; display: flex; flex-direction: column; }
.bk-nav, .bk-hint { flex: none; }
.bk-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 12px; font-size: 14px; }
.bk-nav label { color: var(--meta-color); cursor: pointer; display: flex; align-items: center; gap: 4px; }
.bk-nav #where { min-width: 150px; text-align: center; }
.bk-gap { flex: 1; }
.bk-pages { display: grid; gap: 16px; align-items: start; }
.bk-pages.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
/* two pages: each card is a column (page, text, original) and the pages area scrolls */
.bk-pages.two .bk-page { display: flex; flex-direction: column; }
.bk-pages.two .bk-view { display: contents; }
.bk-pages.two .bk-ru { order: 1; }
.bk-pages.two .bk-edit { order: 2; }
.bk-pages.two .bk-en, .bk-pages.two .bk-jp-wrap { order: 3; }
/* one page: fills the rest of the window, drawings on the left, the text on the right */
.bk-pages.one { flex: 1; min-height: 0; grid-template-rows: minmax(0, 1fr); }
.bk-pages.one .bk-page { height: 100%; min-height: 0; display: grid; gap: 4px 14px;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); }
.bk-pages.one .bk-page-head { grid-column: 1 / -1; margin: 0; }
.bk-pages.one .bk-view { min-height: 0; overflow: hidden; display: flex; flex-direction: column; }
.bk-pages.one .bk-edit { min-height: 0; display: flex; flex-direction: column; }
.bk-pages.one .bk-edit .bk-label { margin-top: 0; }
.bk-pages.one textarea { flex: 1; min-height: 0; resize: none; }
.bk-pages.one .bk-jp { overflow: auto; }
.bk-page {
  background: var(--container-bg); border: 1px solid var(--border-color); border-radius: 5px; padding: 10px 12px 12px;
  box-shadow: 0 2px 5px var(--shadow-color); min-width: 0;
}
.bk-page.bad { border-color: var(--error-color); }
.bk-page-head { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; color: var(--meta-color); margin-bottom: 6px; }
.bk-page-head strong { color: var(--text-color); }
.bk-page-head .bad { color: var(--error-color); font-weight: bold; }
.bk-page-head .ok { color: var(--link); }
.bk-page canvas { display: block; width: 100%; border-radius: 3px; }
/* invisible letters over the drawn page: selection and copying work as on ordinary text */
.bk-canvas { position: relative; }
.bk-layer { position: absolute; inset: 0; color: transparent; overflow: hidden; }
.bk-layer div { position: absolute; right: 0; line-height: 1; white-space: nowrap; }
.bk-layer span { display: inline-block; height: 100%; vertical-align: top; overflow: hidden; white-space: pre; }
.bk-layer span.code { width: 4px; margin: 0 -2px; cursor: help; }      /* no width, but the hint shows on hover */
.bk-layer ::selection { background: rgba(76, 175, 80, .35); color: transparent; }
.bk-page .bk-label { font-size: 11px; font-weight: bold; color: var(--meta-color); margin: 8px 0 3px; display: flex; justify-content: space-between; }
.bk-page textarea {
  display: block; width: 100%; min-height: 12em; resize: vertical; font-family: Consolas, 'Courier New', monospace;
  font-size: 13px; line-height: 1.45; white-space: pre; overflow-x: auto; tab-size: 4;
}
.bk-page textarea.changed { border-color: var(--button-bg); }
/* Zero / Azure: the book title, on the first page of each book */
.bk-title { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--meta-color); margin-bottom: 6px; }
.bk-title input {
  flex: 1; min-width: 0; padding: 4px 7px; border: 1px solid var(--border-color); border-radius: 4px;
  background: var(--container-bg); color: var(--text-color); font: inherit; font-size: 13px;
}
.bk-part-title .edited { color: var(--link); font-weight: normal; }
.bk-page .bk-jp { white-space: pre-wrap; font-size: 13px; line-height: 1.5; background: var(--original-bg); padding: 6px 8px; border-radius: 3px; }
.bk-page .bk-reset { background: none; color: var(--link); border: 0; padding: 0; font-size: 11px; cursor: pointer; }
.bk-hint { color: var(--meta-color); font-size: 14px; line-height: 1.6; max-width: 760px; margin-top: 10px; }
.bk-drop {
  position: fixed; inset: 0; z-index: 20; display: flex; align-items: center; justify-content: center; font-size: 22px;
  background: rgba(46, 125, 50, .18); border: 4px dashed var(--button-bg); color: var(--text-color); pointer-events: none;
}
.bk-drop[hidden] { display: none; }

@media (max-width: 1100px) {
  .bk-pages.two { grid-template-columns: minmax(0, 1fr); }
  .bk-pages.one .bk-page { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1.4fr) minmax(0, 1fr); }
}
/* phones: the window scrolls as usual */
@media (max-width: 760px) {
  body { display: block; overflow: auto; height: auto; }
  .bk-layout { grid-template-columns: minmax(0, 1fr); }
  .bk-toc { max-height: 40vh; border-right: 0; border-bottom: 1px solid var(--border-color); }
  .bk-main { overflow: visible; }
  .bk-pages.one .bk-page { height: auto; display: flex; flex-direction: column; }
  .bk-bar { padding-right: 56px; }
}