/* Code playground page. Reuses .header / .header-nav and .result-content from index.css. */

/* Keep the dark header bar full-bleed (site-wide pattern) but align its inner
   content with the centered playground column below it. The background stays on
   .header so it spans the viewport; padding pushes the title/nav inward to the
   same left/right edges as .playground (1340px column + 24px inner padding). */
.header {
  padding-left: max(24px, calc((100% - 1340px) / 2 + 24px));
  padding-right: max(24px, calc((100% - 1340px) / 2 + 24px));
}

.playground {
  max-width: 1340px;
  margin: 0 auto;
  padding: 24px 24px 60px;
}

.playground-note {
  color: #555;
  line-height: 1.6;
  margin: 0 0 18px;
  font-size: 0.95em;
}

.playground-note code {
  background-color: #f0f4f8;
  padding: 1px 5px;
  border-radius: 3px;
  font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
  font-size: 0.9em;
}

.pg-run-icon {
  font-size: 11px;
  margin-right: 2px;
}

/* Two-column workspace; collapses to one column on narrow viewports. */
.playground-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 20px;
  align-items: stretch;
}

/* No overflow:hidden — the "Load example" dropdown in the tab bar must be free
   to extend below the card. Inner elements round their own outer corners. */
.playground-editor {
  display: flex;
  flex-direction: column;
  background-color: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.playground-editor .pg-tabbar {
  border-radius: 8px 8px 0 0;
}

/* Filename strip above the editor. Matches .pg-panel-header (the Output
   header) for a consistent style and height across both cards. */
.pg-tabbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background-color: #f8f9fa;
  border-bottom: 1px solid #e8e8e8;
}

.pg-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: #2c3e50;
}

.pg-tab-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #1976d2;
}

.pg-modified {
  font-size: 11px;
  font-weight: 500;
  color: #8a6d00;
  background-color: #fff6e0;
  border: 1px solid #f0d999;
  border-radius: 10px;
  padding: 1px 8px;
}

.pg-modified[hidden] {
  display: none;
}

.pg-button {
  padding: 8px 16px;
  border: 1px solid #ddd;
  background-color: white;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.2s;
}

.pg-button:hover {
  background-color: #f0f0f0;
}

.pg-button-primary {
  background-color: #1976d2;
  color: white;
  border-color: #1976d2;
  font-weight: 500;
}

.pg-button-primary:hover {
  background-color: #1565c0;
}

.pg-button:disabled {
  background-color: #ccc;
  border-color: #ccc;
  color: #666;
  cursor: not-allowed;
}

/* Compact button variant for the card header rows (editor tab bar, output
   header), where space is tight. */
.pg-button-sm {
  padding: 4px 11px;
  font-size: 13px;
  border-radius: 6px;
}

.pg-button-sm .pg-run-icon {
  font-size: 10px;
}

/* Editor surface: a positioned box that overlays the highlight <pre> and the
   textarea. It takes over the min-height the textarea used to own. */
.pg-editor-surface {
  position: relative;
  flex: 1;
  min-height: 420px;
  background-color: #fff;
  border-radius: 0 0 8px 8px;
  overflow: hidden;
}

/* The textarea (input) and the highlight <pre> (display) must share EXACTLY
   the same text metrics, or the colored glyphs drift out from under the caret.
   Keep every property that affects glyph position in this one shared rule. */
#playgroundCode,
.pg-highlight {
  margin: 0;
  position: absolute;
  inset: 0;
  box-sizing: border-box;
  padding: 16px;
  border: none;
  font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: normal;
  tab-size: 2;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
  border-radius: 0 0 8px 8px;
}

/* The real editor, on top. Its text is transparent so the highlight layer
   shows through; only the caret is painted. No resize — a resized textarea
   would desync from the fixed-height highlight layer. */
#playgroundCode {
  z-index: 1;
  width: 100%;
  height: 100%;
  resize: none;
  color: transparent;
  caret-color: #2c3e50;
  background: transparent;
  overflow: auto;
}

#playgroundCode:focus {
  outline: none;
}

/* The textarea text is transparent (the highlight layer shows through), so a
   solid selection highlight would paint over the colored glyphs and leave the
   selection unreadable. A translucent blue keeps the highlighted text visible
   underneath while still marking the selection. */
#playgroundCode::selection {
  background-color: rgba(25, 118, 210, 0.25);
}

/* When highlighting is unavailable the textarea paints its own (opaque) text,
   so a normal selection highlight is correct there. */
.pg-editor-surface.no-highlight #playgroundCode::selection {
  background-color: #b3d4fc;
}

/* The highlight layer, behind the textarea. Non-interactive; its scroll is
   mirrored from the textarea in JS (so overflow is hidden here). */
.pg-highlight {
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  color: #2c3e50;
  background-color: #fff;
}

.pg-highlight code {
  font: inherit;
  white-space: inherit;
  tab-size: inherit;
}

/* Graceful degradation: if Prism failed to load, JS sets .no-highlight, which
   hides the (empty) highlight layer and restores the textarea's visible text —
   identical to the plain editor we had before highlighting. */
.pg-editor-surface.no-highlight .pg-highlight {
  display: none;
}

.pg-editor-surface.no-highlight #playgroundCode {
  color: #2c3e50;
  caret-color: auto;
}

/* Inline Prism token theme, tuned to the light editor palette (#2c3e50 base
   on #fff). Self-hosted — no vendored theme CSS, no CSP change. */
.pg-highlight .token.comment,
.pg-highlight .token.prolog,
.pg-highlight .token.doctype,
.pg-highlight .token.cdata {
  color: #8a97a4;
  font-style: italic;
}

.pg-highlight .token.punctuation {
  color: #5b6b7b;
}

.pg-highlight .token.keyword,
.pg-highlight .token.boolean,
.pg-highlight .token.atrule {
  color: #1565c0;
}

.pg-highlight .token.string,
.pg-highlight .token.template-string,
.pg-highlight .token.char,
.pg-highlight .token.regex {
  color: #1a7f5a;
}

.pg-highlight .token.number,
.pg-highlight .token.constant,
.pg-highlight .token.symbol {
  color: #b5651d;
}

.pg-highlight .token.function,
.pg-highlight .token.class-name {
  color: #8a4fbf;
}

.pg-highlight .token.operator {
  color: #c0392b;
}

.pg-highlight .token.parameter,
.pg-highlight .token.property {
  color: #2c3e50;
}

/* Copy icon button, at the far right of each card header (tab bar / output
   header). SVG glyph, no text. */
.pg-copy-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid #e0e0e0;
  border-radius: 6px;
  background-color: #fff;
  color: #6a737d;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.pg-copy-icon:hover {
  background-color: #f0f4f8;
  border-color: #c8d2dd;
  color: #1976d2;
}

/* Default: show the copy glyph, hide the check. */
.pg-copy-icon .pg-check-glyph { display: none; }

/* Copied: swap to a green check. */
.pg-copy-icon.is-copied {
  border-color: #27ae60;
  color: #27ae60;
}

.pg-copy-icon.is-copied .pg-copy-glyph { display: none; }
.pg-copy-icon.is-copied .pg-check-glyph { display: inline; }

/* Output card mirrors the editor card. */
.playground-output-card {
  display: flex;
  flex-direction: column;
  background-color: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.pg-panel-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background-color: #f8f9fa;
  border-bottom: 1px solid #e8e8e8;
}

.pg-panel-header-spacer {
  flex: 1;
}

/* Run status shown beside the Output title (not in the output body). Matches
   the title's font-size and line-height so the two read on the same line. */
.pg-status {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  line-height: 1;
  font-weight: 500;
  color: #6a737d;
}

.pg-status[hidden] {
  display: none;
}

.pg-status.running {
  color: #1976d2;
}

.pg-status.done {
  color: #27ae60;
}

.pg-status.error {
  color: #e74c3c;
}

.pg-panel-title {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  line-height: 1;
  font-weight: 600;
  color: #2c3e50;
}

.pg-panel-title::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #27ae60;
  transition: background-color 0.15s;
}

/* Tint the status dot to match the run status shown next to it. The status
   span (#playgroundStatus) is the title's immediate next sibling. */
.pg-panel-title:has(+ .pg-status.running)::before {
  background-color: #1976d2;
}

.pg-panel-title:has(+ .pg-status.error)::before {
  background-color: #e74c3c;
}


#playgroundOutput {
  flex: 1;
  min-height: 420px;
  max-height: 600px;
  border: none;
  box-shadow: none;
  border-radius: 0 0 8px 8px;
}

.pg-line {
  white-space: pre-wrap;
  word-wrap: break-word;
}

.pg-line.error {
  color: #e74c3c;
}

.pg-line.warn {
  color: #b8860b;
}

.pg-line.result {
  color: #27ae60;
}

/* Example pills + overflow dropdown (rendered into #playgroundExamples). */
/* "Load example" dropdown, anchored in the editor tab bar. */
.playground-examples {
  position: relative;
  display: inline-flex;
}

.pg-load-example {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid #bcd6f3;
  background-color: #eef4fb;
  color: #1565c0;
  border-radius: 6px;
  padding: 4px 11px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s, border-color 0.15s;
}

.pg-load-example:hover {
  background-color: #e2eefb;
  border-color: #9ec2ec;
}

.pg-pill-caret {
  font-size: 9px;
  opacity: 0.7;
  display: inline-block;
  transition: transform 0.15s;
}

/* Flip the caret (▾ → ▲) while the dropdown is open. */
.pg-load-example[aria-expanded="true"] .pg-pill-caret {
  transform: rotate(180deg);
}

.pg-pill-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 20;
  min-width: 260px;
  max-height: 360px;
  overflow-y: auto;
  background-color: #fff;
  border: 1px solid #dde1e6;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  padding: 6px;
}

.pg-pill-menu[hidden] {
  display: none;
}

.pg-pill-menu-header {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #9aa5b1;
  padding: 8px 10px 4px;
}

.pg-pill-menu-header:not(:first-child) {
  border-top: 1px solid #f0f0f0;
  margin-top: 4px;
}

.pg-pill-menu-item {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: none;
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
  color: #3a4a5a;
  cursor: pointer;
}

.pg-pill-menu-item:hover {
  background-color: #f3f6fa;
  color: #1565c0;
}

.pg-pill-menu-item.is-active {
  background-color: #e8f1fb;
  color: #1565c0;
}

.pg-pill-menu-title {
  display: block;
  font-weight: 500;
}

.pg-pill-menu-item .pg-pill-menu-desc {
  display: block;
  font-size: 11px;
  color: #8a97a4;
  margin-top: 2px;
}

.playground-examples-intro {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid #e8e8e8;
  color: #888;
  font-size: 0.85em;
  line-height: 1.5;
  text-align: center;
}

/* Collapse to a single column on narrow viewports. */
@media (max-width: 900px) {
  .playground-workspace {
    grid-template-columns: 1fr;
  }

  #playgroundOutput {
    min-height: 220px;
  }
}