:root {
  color-scheme: dark;
  --bg: #111111;
  --panel: #1a1a1a;
  --border: #2a2a2a;
  --text: #f2f2f2;
  --muted: #9a9a9a;
  --accent: #6aa9ff;
  --accent-hover: #9ec5ff;
  --error: #ff6b6b;
  --input-bg: #111111;
  --input-border: #3a3a3a;
  --button-bg: #2a2a2a;
  --button-border: #3a3a3a;
  --info-bg: #152a3a;
  --error-bg: #3a1515;
  --stage-bg: #111111;
  --stage-wrap-bg: #0a0a0a;
  --backdrop: rgba(0, 0, 0, 0.72);
  --selection: rgba(106, 169, 255, 0.48);
  --cm-comment: #c4c7cc;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #f5f5f5;
  --border: #d8d8d8;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --error: #dc2626;
  --input-bg: #ffffff;
  --input-border: #c4c4c4;
  --button-bg: #ececec;
  --button-border: #c4c4c4;
  --info-bg: #e8f0fe;
  --error-bg: #fdecec;
  --stage-bg: #f5f5f5;
  --stage-wrap-bg: #e8e8e8;
  --backdrop: rgba(0, 0, 0, 0.45);
  --selection: rgba(37, 99, 235, 0.22);
  --cm-comment: #6a737d;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.hint {
  color: var(--muted);
  font-size: 13px;
}

.page-title {
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 40vw;
  flex: 0 1 auto;
}

/* --- Search (top bar) --------------------------------------------------- */
.header-search {
  position: relative;
  margin-left: auto;
  flex: 1 1 auto;
  max-width: 420px;
}

#search-input {
  width: 100%;
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 14px;
}

#search-input:focus {
  outline: none;
  border-color: var(--accent);
}

#search-results {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  z-index: 60;
  max-height: 60vh;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

#search-results[hidden] { display: none; }

/* --- Menu lists (search + pages sheet) ---------------------------------- */
.menu-list { display: flex; flex-direction: column; }

.menu-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-radius: 0;
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
}

.menu-item:last-child { border-bottom: none; }
.menu-item:hover, .menu-item:focus { background: var(--button-bg); outline: none; }
.menu-item.create { color: var(--accent); font-weight: 600; }
.menu-item.empty { color: var(--muted); cursor: default; }
.menu-item.empty:hover { background: transparent; }

/* --- Icon buttons ------------------------------------------------------- */
.icon-btn {
  padding: 6px 10px;
  font-size: 16px;
  line-height: 1;
}

/* --- Bottom action bar (thumb reach) ------------------------------------ */
#bottom-bar {
  display: flex;
  align-items: stretch;
  gap: 8px;
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--border);
  background: var(--panel);
}

#bottom-bar button {
  flex: 1 1 0;
  padding: 12px 8px;
  font-size: 15px;
}

#bottom-bar #nav-more { flex: 0 0 auto; }

/* --- Bottom sheets ------------------------------------------------------ */
.sheet { position: fixed; inset: 0; z-index: 120; }
.sheet[hidden] { display: none; }

.sheet-backdrop {
  position: absolute;
  inset: 0;
  background: var(--backdrop);
}

.sheet-panel {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  max-height: 80vh;
  overflow-y: auto;
  padding: 12px 12px calc(16px + env(safe-area-inset-bottom, 0px));
  background: var(--panel);
  border-top: 1px solid var(--border);
  border-radius: 14px 14px 0 0;
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.45);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sheet-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 2px 4px;
}

#more-sheet .sheet-panel button {
  text-align: left;
  padding: 12px;
  font-size: 15px;
}

#pages-filter {
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 9px 10px;
  font-size: 14px;
}

#pages-filter:focus { outline: none; border-color: var(--accent); }

.pages-section[hidden] { display: none; }
.pages-section-label {
  font-size: 12px;
  color: var(--muted);
  margin: 8px 2px 2px;
}

.pages-section .menu-list {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

/* Roomier centred panels on wide screens; bottom bar stays but reads as a
   slim toolbar. One shell, different affordances. */
@media (min-width: 760px) {
  .sheet-panel {
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    width: 520px;
    max-width: calc(100vw - 32px);
    bottom: 64px;
    border-radius: 12px;
    border: 1px solid var(--border);
  }
}

.cm-s-material-darker .cm-wiki-link,
.cm-s-default .cm-wiki-link {
  color: var(--accent) !important;
  text-decoration: underline;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  touch-action: manipulation;
}

.cm-s-material-darker .cm-wiki-link:hover,
.cm-s-default .cm-wiki-link:hover {
  color: var(--accent-hover) !important;
}

#error.info {
  background: var(--info-bg);
  color: var(--accent);
}

button {
  background: var(--button-bg);
  color: var(--text);
  border: 1px solid var(--button-border);
  border-radius: 4px;
  padding: 6px 14px;
  font-size: 14px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

#error {
  margin: 0;
  padding: 8px 14px;
  background: var(--error-bg);
  color: var(--error);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  white-space: pre-wrap;
}

#error[hidden] {
  display: none;
}

main {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

#editor {
  flex: 1;
  min-width: 0;
  min-height: 0;
}

#editor .CodeMirror {
  height: 100%;
  font-size: 13px;
}

/* --- Read view ---------------------------------------------------------- */
#reader {
  flex: 1;
  min-width: 0;
  min-height: 0;
  width: 100%;
  overflow: auto;
  padding: 24px 28px 64px;
  background: var(--bg);
  color: var(--text);
}

#reader[hidden] {
  display: none;
}

/* Comfortable reading measure, centred. */
#reader > * {
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.read-h1 { font-size: 1.9em; line-height: 1.2; margin-top: 0.2em; margin-bottom: 0.5em; }
.read-h2 {
  font-size: 1.5em;
  line-height: 1.25;
  margin-top: 1.4em;
  margin-bottom: 0.5em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.2em;
}
.read-h3 { font-size: 1.2em; margin-top: 1.2em; margin-bottom: 0.4em; }
.read-h4, .read-h5, .read-h6 { font-size: 1.05em; margin-top: 1em; margin-bottom: 0.3em; }

.read-p { margin-top: 0; margin-bottom: 1em; line-height: 1.65; }
.read-ul { margin-top: 0; margin-bottom: 1em; padding-left: 1.4em; line-height: 1.65; }
.read-ul li { margin: 0.2em 0; }

.read-code {
  padding: 14px 16px;
  margin-top: 0;
  margin-bottom: 1.2em;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.5;
  white-space: pre;
}
.read-code code { font-family: inherit; }

.read-code-inline {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
}

.read-ext-link { color: var(--accent); }

#reader .cm-wiki-link {
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
}
#reader .cm-wiki-link:hover { color: #9ec5ff; }

/* Dark (material-darker) editor: make the selection clearly visible. */
.cm-s-material-darker div.CodeMirror-selected,
.cm-s-material-darker.CodeMirror-focused div.CodeMirror-selected {
  background: var(--selection) !important;
}

.cm-s-material-darker .CodeMirror-line::selection,
.cm-s-material-darker .CodeMirror-line > span::selection,
.cm-s-material-darker .CodeMirror-line > span > span::selection {
  background: var(--selection) !important;
  color: #ffffff !important;
}

.cm-s-material-darker .CodeMirror-line::-moz-selection,
.cm-s-material-darker .CodeMirror-line > span::-moz-selection,
.cm-s-material-darker .CodeMirror-line > span > span::-moz-selection {
  background: var(--selection) !important;
  color: #ffffff !important;
}

/* Light (default) editor: keep CodeMirror's own selection, just tint it. */
.cm-s-default div.CodeMirror-selected,
.cm-s-default.CodeMirror-focused div.CodeMirror-selected {
  background: var(--selection) !important;
}

.cm-s-material-darker .cm-comment,
.cm-s-default .cm-comment {
  color: var(--cm-comment);
}

/* WCHNT syntax colours — dark theme */
.cm-s-material-darker .cm-wchnt-class,
.cm-s-material-darker .cm-wchnt-class span { color: #82aaff; }
.cm-s-material-darker .cm-wchnt-type,
.cm-s-material-darker .cm-wchnt-type span { color: #89ddff; }
.cm-s-material-darker .cm-wchnt-name,
.cm-s-material-darker .cm-wchnt-name span { color: #f07178; }
.cm-s-material-darker .cm-wchnt-sigil,
.cm-s-material-darker .cm-wchnt-sigil span { color: #ffcb6b; }
.cm-s-material-darker .cm-wchnt-keyword,
.cm-s-material-darker .cm-wchnt-keyword span {
  color: #c792ea;
  font-weight: 600;
}
.cm-s-material-darker .cm-wchnt-string,
.cm-s-material-darker .cm-wchnt-string span { color: #c3e88d; }
.cm-s-material-darker .cm-wchnt-number,
.cm-s-material-darker .cm-wchnt-number span { color: #f78c6c; }
.cm-s-material-darker .cm-wchnt-method,
.cm-s-material-darker .cm-wchnt-method span { color: #82aaff; }
.cm-s-material-darker .cm-wchnt-path,
.cm-s-material-darker .cm-wchnt-path span { color: #babed8; }
.cm-s-material-darker .cm-wchnt-error,
.cm-s-material-darker .cm-wchnt-error span {
  background: rgba(255, 80, 80, 0.22);
}
.cm-s-material-darker .cm-wchnt-error {
  border-bottom: 2px solid #ff6b6b;
}

/* WCHNT syntax colours — light theme */
.cm-s-default .cm-wchnt-class,
.cm-s-default .cm-wchnt-class span { color: #1c5fbf; }
.cm-s-default .cm-wchnt-type,
.cm-s-default .cm-wchnt-type span { color: #0a7d9c; }
.cm-s-default .cm-wchnt-name,
.cm-s-default .cm-wchnt-name span { color: #c0392b; }
.cm-s-default .cm-wchnt-sigil,
.cm-s-default .cm-wchnt-sigil span { color: #8a6d00; }
.cm-s-default .cm-wchnt-keyword,
.cm-s-default .cm-wchnt-keyword span {
  color: #7c3aed;
  font-weight: 600;
}
.cm-s-default .cm-wchnt-string,
.cm-s-default .cm-wchnt-string span { color: #2e7d32; }
.cm-s-default .cm-wchnt-number,
.cm-s-default .cm-wchnt-number span { color: #b34700; }
.cm-s-default .cm-wchnt-method,
.cm-s-default .cm-wchnt-method span { color: #1c5fbf; }
.cm-s-default .cm-wchnt-path,
.cm-s-default .cm-wchnt-path span { color: #5a5a7a; }
.cm-s-default .cm-wchnt-error,
.cm-s-default .cm-wchnt-error span {
  background: rgba(220, 38, 38, 0.15);
}
.cm-s-default .cm-wchnt-error {
  border-bottom: 2px solid #dc2626;
}

#run-modal[hidden] {
  display: none;
}

#run-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
}

.run-modal-backdrop {
  width: 100%;
  height: 100%;
  background: var(--backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.run-modal-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
  max-width: calc(100vw - 48px);
  max-height: calc(100vh - 48px);
  overflow: hidden;
}

.run-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.run-modal-header span {
  font-weight: 600;
}

.run-modal-hint {
  margin: 0;
  padding: 8px 16px 12px;
  color: var(--muted);
  font-size: 13px;
}

#stage-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--stage-wrap-bg);
}

#stage {
  display: block;
  width: 800px;
  height: 600px;
  max-width: 100%;
  background: var(--stage-bg);
  border: 1px solid var(--border);
}

#stage-keys {
  position: absolute;
  width: 800px;
  height: 600px;
  max-width: calc(100% - 32px);
  padding: 0;
  margin: 0;
  border: 1px solid transparent;
  border-radius: 0;
  resize: none;
  overflow: hidden;
  opacity: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  z-index: 1;
}

#stage-keys:focus {
  opacity: 0;
  border-color: var(--accent);
  outline: none;
}

@media (max-width: 860px) {
  #stage,
  #stage-keys {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
  }
}

#stage-wrap[hidden],
#cli-wrap[hidden],
.run-modal-hint[hidden] {
  display: none;
}

#cli-wrap {
  display: flex;
  flex-direction: column;
  width: 800px;
  max-width: 100%;
  height: min(600px, 70vh);
  background: var(--stage-wrap-bg);
}

#cli-transcript {
  flex: 1;
  margin: 0;
  padding: 12px 16px;
  overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  background: var(--stage-bg);
}

#cli-line {
  border: 0;
  border-top: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  padding: 10px 16px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
}

#cli-line:focus {
  outline: none;
  box-shadow: inset 0 0 0 1px var(--accent);
}