:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #202124;
  background: #f6f7f9;
}

* { box-sizing: border-box; }
body { margin: 0; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.muted { color: #6b7280; font-size: 0.9rem; }
.error { color: #b42318; margin-top: .75rem; }
.danger { color: #b42318; }
.primary { font-weight: 650; }

#app {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

#sidebar {
  background: #1f2937;
  color: white;
  padding: 18px;
  overflow-y: auto;
}

.brand { font-size: 1.2rem; font-weight: 700; margin-bottom: 14px; }
#user-box { font-size: .9rem; margin-bottom: 12px; }
.sidebar-actions { display: flex; gap: 8px; margin-bottom: 10px; }
#page-list { display: flex; flex-direction: column; gap: 2px; }
.page-link { color: white; text-decoration: none; padding: 7px 8px; border-radius: 5px; }
.page-link:hover, .page-link.active { background: #374151; }

#main { min-width: 0; padding: 28px; }
.card { max-width: 440px; margin: 12vh auto 0; padding: 28px; background: white; border: 1px solid #dfe3e8; border-radius: 10px; }
.card label { display: grid; gap: 6px; margin: 14px 0; }
.card input { padding: 9px 10px; }

.page-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-header h1 { margin: 0; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; }
.toolbar button, .sidebar-actions button, .user-form button { padding: 7px 10px; }

.markdown-body {
  background: white;
  border: 1px solid #dfe3e8;
  border-radius: 8px;
  padding: 28px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}
.markdown-body img { max-width: 100%; height: auto; }
.markdown-body pre { overflow: auto; padding: 12px; background: #f3f4f6; border-radius: 6px; }
.markdown-body code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.markdown-body table { border-collapse: collapse; }
.markdown-body th, .markdown-body td { border: 1px solid #d1d5db; padding: 6px 9px; }

.editor-heading { display: grid; gap: 5px; flex: 1; }
.title-input, #edit-summary { padding: 9px 10px; }
#editor-slug-info { min-height: 1.3em; padding-left: 2px; }
.title-input { font-size: 1.25rem; font-weight: 650; }

.editor-shell .EasyMDEContainer {
  width: 100%;
}

.EasyMDEContainer .editor-toolbar {
  border-color: #cfd5dc;
  background: white;
  padding: 6px;
}

.EasyMDEContainer .editor-toolbar button.rw-mde-button {
  width: auto;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  border: 0;
  border-radius: 4px;
  font-family: inherit;
  font-size: .82rem;
  line-height: 30px;
  color: #374151;
}

.EasyMDEContainer .editor-toolbar button.rw-mde-button:hover,
.EasyMDEContainer .editor-toolbar button.rw-mde-button.active {
  background: #e5e7eb;
}

.EasyMDEContainer .editor-toolbar button.rw-mde-bold {
  font-weight: 750;
}

.EasyMDEContainer .editor-toolbar button.rw-mde-italic {
  font-style: italic;
}

.EasyMDEContainer .editor-toolbar button.rw-mde-strikethrough {
  text-decoration: line-through;
}

.EasyMDEContainer .CodeMirror,
.EasyMDEContainer .CodeMirror-scroll,
.EasyMDEContainer .editor-preview-side {
  min-height: 520px;
}

.EasyMDEContainer .CodeMirror {
  border-color: #cfd5dc;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.55;
}

.EasyMDEContainer .editor-preview,
.EasyMDEContainer .editor-preview-side {
  line-height: 1.6;
}

.EasyMDEContainer .editor-preview-side.markdown-body {
  border-radius: 0;
}

.EasyMDEContainer .editor-statusbar {
  padding-right: 4px;
  color: #6b7280;
}

.EasyMDEContainer.dragging {
  outline: 3px dashed #64748b;
  outline-offset: 5px;
}

.preview-pane {
  overflow: auto;
}

.save-row { display: flex; gap: 12px; align-items: center; margin-top: 10px; }
#edit-summary { flex: 1; }

.history-row, .user-row {
  display: grid;
  gap: 8px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid #dfe3e8;
}
.history-row { grid-template-columns: minmax(0, 1fr) auto auto; }
.user-row { grid-template-columns: 1.1fr 1.2fr 110px 80px 1fr 140px; }
.user-row input, .user-row select { padding: 6px 7px; }
.user-form { display: grid; grid-template-columns: 1fr 1fr 1fr 120px auto; gap: 8px; margin-bottom: 20px; }
#diff-target { margin-top: 24px; background: white; }

@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; }
  #sidebar { min-height: auto; }
  .user-form, .user-row { grid-template-columns: 1fr; }
}


/* Document styling follows the restrained layout of Racket's Scribble manuals:
   light navigation, readable measure, compact headings, and code-oriented text. */
:root {
  --wiki-text: #202020;
  --wiki-muted: #666;
  --wiki-link: #3b4f91;
  --wiki-border: #d8d8d8;
  --wiki-sidebar: #f1f1f1;
  --wiki-code-bg: #f4f4f4;
  --wiki-font-size: 16px;
  --wiki-line-height: 1.55;
  --wiki-h1-size: 2rem;
  --wiki-h2-size: 1.5rem;
  --wiki-h3-size: 1.25rem;
  --wiki-h4-size: 1.08rem;
}

body {
  color: var(--wiki-text);
  background: white;
}

#app {
  grid-template-columns: 300px minmax(0, 1fr);
}

#sidebar {
  background: var(--wiki-sidebar);
  color: var(--wiki-text);
  border-right: 1px solid var(--wiki-border);
  padding: 18px 16px 28px;
}

.brand {
  color: #111;
  font-size: 1.18rem;
  margin-bottom: 14px;
}

#user-box,
#sidebar .muted {
  color: var(--wiki-muted);
}

.sidebar-actions button {
  background: #fff;
  color: #222;
  border: 1px solid #c7c7c7;
  border-radius: 3px;
}

.sidebar-section {
  margin-top: 20px;
}

.sidebar-heading {
  margin: 0 6px 7px;
  color: #555;
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

#page-list,
.toc-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.page-link,
.toc-link {
  color: var(--wiki-link);
  text-decoration: none;
  border-radius: 3px;
}

.page-link {
  padding: 5px 7px;
}

.page-link:hover,
.page-link.active,
.toc-link:hover {
  background: #e2e2e2;
  color: #1e2f6d;
}

.toc-link {
  padding: 3px 7px;
  font-size: .9rem;
  line-height: 1.3;
}

.toc-level-2 { padding-left: 18px; }
.toc-level-3 { padding-left: 30px; font-size: .86rem; }
.toc-level-4 { padding-left: 42px; font-size: .83rem; }
.toc-empty {
  padding: 3px 7px;
  color: #888;
  font-size: .86rem;
  font-style: italic;
}

.pages-section {
  padding-top: 12px;
  border-top: 1px solid #d7d7d7;
}

#main {
  padding: 30px 42px 60px;
}

#page-view,
#not-found-view,
#history-view,
#admin-view {
  max-width: 1040px;
}

.markdown-body,
.EasyMDEContainer .editor-preview,
.EasyMDEContainer .editor-preview-side {
  font-family: Arial, Helvetica, sans-serif;
  font-size: var(--wiki-font-size);
  line-height: var(--wiki-line-height);
  color: var(--wiki-text);
}

.markdown-body {
  background: white;
  border: 0;
  border-radius: 0;
  padding: 0;
  max-width: 900px;
}

.markdown-body h1,
.EasyMDEContainer .editor-preview h1,
.EasyMDEContainer .editor-preview-side h1 {
  font-size: var(--wiki-h1-size);
  line-height: 1.18;
  margin: 1.15em 0 .45em;
}

.markdown-body h2,
.EasyMDEContainer .editor-preview h2,
.EasyMDEContainer .editor-preview-side h2 {
  font-size: var(--wiki-h2-size);
  line-height: 1.22;
  margin: 1.25em 0 .45em;
}

.markdown-body h3,
.EasyMDEContainer .editor-preview h3,
.EasyMDEContainer .editor-preview-side h3 {
  font-size: var(--wiki-h3-size);
  line-height: 1.25;
  margin: 1.2em 0 .4em;
}

.markdown-body h4,
.EasyMDEContainer .editor-preview h4,
.EasyMDEContainer .editor-preview-side h4 {
  font-size: var(--wiki-h4-size);
  line-height: 1.3;
  margin: 1.1em 0 .35em;
}

.markdown-body h5,
.markdown-body h6,
.EasyMDEContainer .editor-preview h5,
.EasyMDEContainer .editor-preview h6,
.EasyMDEContainer .editor-preview-side h5,
.EasyMDEContainer .editor-preview-side h6 {
  font-size: 1rem;
}

.markdown-body a,
.EasyMDEContainer .editor-preview a,
.EasyMDEContainer .editor-preview-side a {
  color: var(--wiki-link);
}

.markdown-body pre,
.EasyMDEContainer .editor-preview pre,
.EasyMDEContainer .editor-preview-side pre {
  padding: 10px 12px;
  background: var(--wiki-code-bg);
  border: 1px solid #e1e1e1;
  border-radius: 2px;
}

.markdown-body code,
.EasyMDEContainer .editor-preview code,
.EasyMDEContainer .editor-preview-side code {
  font-family: "DejaVu Sans Mono", Consolas, "Liberation Mono", monospace;
  font-size: .94em;
}

.markdown-body blockquote,
.EasyMDEContainer .editor-preview blockquote,
.EasyMDEContainer .editor-preview-side blockquote {
  margin-left: 0;
  padding-left: 1em;
  border-left: 3px solid #bbb;
  color: #555;
}

/*
 * The source editor deliberately uses a slightly smaller, tighter monospace
 * body than the rendered document. Monospace text is wider than proportional
 * document text; keeping it at the same 16px size made the source wrap much
 * earlier and therefore consume far more vertical space. Headings keep the
 * same scale as their rendered counterparts.
 */
.EasyMDEContainer .CodeMirror {
  font-family: "DejaVu Sans Mono", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.38;
}

.EasyMDEContainer .CodeMirror pre.CodeMirror-line,
.EasyMDEContainer .CodeMirror pre.CodeMirror-line-like {
  line-height: 1.38;
}

.EasyMDEContainer .CodeMirror .cm-header-1 { font-size: var(--wiki-h1-size); line-height: 1.18; }
.EasyMDEContainer .CodeMirror .cm-header-2 { font-size: var(--wiki-h2-size); line-height: 1.22; }
.EasyMDEContainer .CodeMirror .cm-header-3 { font-size: var(--wiki-h3-size); line-height: 1.25; }
.EasyMDEContainer .CodeMirror .cm-header-4 { font-size: var(--wiki-h4-size); line-height: 1.3; }
.EasyMDEContainer .CodeMirror .cm-header-5,
.EasyMDEContainer .CodeMirror .cm-header-6 { font-size: 1rem; line-height: var(--wiki-line-height); }

.EasyMDEContainer .editor-toolbar button {
  width: 30px;
  min-width: 30px;
  padding: 0;
  color: #333;
}

.EasyMDEContainer .editor-toolbar button.fa::before {
  font-family: FontAwesome;
}

@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; }
  #sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--wiki-border);
  }
  #main { padding: 22px 18px 50px; }
}

.breadcrumbs {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .4rem;
  max-width: 1040px;
  margin: 0 0 22px;
  color: var(--wiki-muted);
  font-size: .86rem;
}

.breadcrumbs a {
  color: var(--wiki-link);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumb-label {
  color: #777;
  font-size: .82rem;
}

.breadcrumb-separator {
  color: #999;
}

.breadcrumb-current {
  color: #444;
}

.page-details {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1rem;
  max-width: 900px;
  margin-top: 38px;
  padding-top: 10px;
  border-top: 1px solid #e2e2e2;
  color: #777;
  font-size: .78rem;
  line-height: 1.45;
}

.page-tag {
  color: #555;
}

.editor-metadata-row {
  display: grid;
  grid-template-columns: minmax(180px, .8fr) minmax(260px, 1.4fr) auto;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

#editor-tags,
#edit-summary {
  min-width: 0;
  padding: 9px 10px;
}

@media (max-width: 900px) {
  .editor-metadata-row {
    grid-template-columns: 1fr;
  }
}


.wiki-search {
  margin-top: 16px;
}

.wiki-search input {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid #c6c6c6;
  border-radius: 3px;
  background: white;
  color: var(--wiki-text);
  font: inherit;
}

#search-view {
  max-width: 900px;
}

.search-results {
  margin-top: 24px;
}

.search-result {
  padding: 0 0 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid #e2e2e2;
}

.search-result h2 {
  margin: 0 0 5px;
  font-size: 1.08rem;
}

.search-result h2 a {
  color: var(--wiki-link);
  text-decoration: none;
}

.search-result h2 a:hover {
  text-decoration: underline;
}

.search-result p {
  margin: 0;
  line-height: 1.5;
  color: #444;
}

.search-result mark {
  background: #fff1a8;
  padding: 0 .08em;
}


/* Long-document editing ---------------------------------------------------
   In editor mode the chrome stays in place while the source and preview
   become the scrollable regions. This keeps breadcrumbs, title/actions,
   EasyMDE toolbar and the page TOC available throughout a long document. */

#sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.toc-section {
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  flex-direction: column;
}

#toc-list {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.pages-section {
  flex: 0 0 auto;
  max-height: 34vh;
  overflow-y: auto;
}

body.editor-mode {
  overflow: hidden;
}

body.editor-mode #app {
  height: 100vh;
  min-height: 0;
}

body.editor-mode #main {
  display: grid;
  height: 100vh;
  min-height: 0;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
  padding-bottom: 18px;
}

body.editor-mode #breadcrumbs {
  position: relative;
  z-index: 30;
  margin-bottom: 10px;
  padding: 3px 0 7px;
  background: white;
}

body.editor-mode #editor-view:not(.hidden) {
  display: grid;
  min-height: 0;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
}

body.editor-mode #editor-view .page-header {
  position: relative;
  z-index: 29;
  margin-bottom: 10px;
  padding-bottom: 9px;
  background: white;
  border-bottom: 1px solid var(--wiki-border);
}

body.editor-mode .editor-shell .EasyMDEContainer {
  --editor-toolbar-height: 43px;
  --editor-status-height: 25px;
  position: relative;
  display: grid;
  min-height: 0;
  height: 100%;
  grid-template-rows: auto minmax(0, 1fr) auto;
  overflow: hidden;
}

body.editor-mode .EasyMDEContainer .editor-toolbar {
  position: relative;
  z-index: 25;
  grid-row: 1;
  margin: 0;
  background: white;
}

body.editor-mode .EasyMDEContainer .CodeMirror {
  grid-row: 2;
  min-height: 0 !important;
  height: 100% !important;
  overflow: hidden;
}

body.editor-mode .EasyMDEContainer .CodeMirror-scroll {
  min-height: 0 !important;
  height: 100%;
  overflow-y: auto !important;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

body.editor-mode .EasyMDEContainer .editor-statusbar {
  grid-row: 3;
  min-height: var(--editor-status-height);
  background: white;
}

/* EasyMDE normally positions the side preview against the viewport. In the
   wiki it belongs to the editor work area, so it gets its own independent
   scroll region beside CodeMirror instead. */
body.editor-mode .EasyMDEContainer .editor-preview-side {
  position: absolute;
  z-index: 20;
  top: var(--editor-toolbar-height);
  right: 0;
  bottom: var(--editor-status-height);
  left: 50%;
  width: 50%;
  height: auto;
  min-height: 0;
  margin: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  border-top: 0;
}

body.editor-mode .EasyMDEContainer .CodeMirror-sided {
  width: 50% !important;
}

body.editor-mode .editor-metadata-row {
  position: relative;
  z-index: 29;
  margin-top: 8px;
  padding-top: 8px;
  background: white;
  border-top: 1px solid var(--wiki-border);
}

@media (max-width: 900px) {
  #sidebar {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
  }

  .toc-section,
  #toc-list,
  .pages-section {
    max-height: none;
    overflow: visible;
  }

  body.editor-mode {
    overflow: auto;
  }

  body.editor-mode #app,
  body.editor-mode #main {
    display: block;
    height: auto;
    overflow: visible;
  }

  body.editor-mode #editor-view:not(.hidden),
  body.editor-mode .editor-shell .EasyMDEContainer {
    display: block;
    height: auto;
    overflow: visible;
  }

  body.editor-mode .EasyMDEContainer .CodeMirror,
  body.editor-mode .EasyMDEContainer .CodeMirror-scroll {
    min-height: 520px !important;
    height: auto !important;
  }
}

/* Todo and connection status -------------------------------------------- */
.connection-status {
  position: fixed;
  z-index: 2000;
  top: 12px;
  right: 14px;
  padding: 7px 11px;
  border: 1px solid;
  border-radius: 4px;
  background: white;
  font-size: .86rem;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .12);
}

.connection-status.offline {
  color: #8b1f1f;
  border-color: #d9a0a0;
  background: #fff1f1;
}

.connection-status.online {
  color: #286b3d;
  border-color: #9dcaaa;
  background: #f1fbf4;
}

.wiki-todo {
  display: inline-block;
  padding: .08em .38em;
  border: 1px solid #c9aa58;
  border-radius: 3px;
  background: #fff8dc;
  color: #5d4700;
}

.todo-items {
  max-width: 900px;
}

.todo-item {
  display: grid;
  grid-template-columns: minmax(160px, 260px) 1fr auto;
  gap: 10px 18px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid #e2e2e2;
}

.todo-item > a {
  color: var(--wiki-link);
  font-weight: 600;
  text-decoration: none;
}

.todo-item > a:hover {
  text-decoration: underline;
}

@media (max-width: 700px) {
  .todo-item {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}