/*
 * code.css — inline code, fenced code blocks, syntax-highlight token colors,
 * the per-block language label + copy button, and Mermaid/KaTeX error styles.
 *
 * Scoped under `.markdown-body`. Highlight.js token colors below are derived from
 * the vendored web/vendor/highlight/styles/github.min.css and github-dark.min.css
 * (BSD-3-Clause, GitHub's own light/dark palettes) and applied as CSS variables so
 * both themes work without swapping stylesheets or re-highlighting on theme change.
 */

:root[data-theme="light"] {
  --mdr-code-chip-bg: #f6f8fa;
  --mdr-code-btn-hover-bg: #eaeef2;
  --mdr-code-copied-fg: #1a7f37;

  --mdr-hljs-fg: #24292e;
  --mdr-hljs-keyword: #d73a49;
  --mdr-hljs-title: #6f42c1;
  --mdr-hljs-attr: #005cc5;
  --mdr-hljs-string: #032f62;
  --mdr-hljs-built-in: #e36209;
  --mdr-hljs-comment: #6a737d;
  --mdr-hljs-name: #22863a;
  --mdr-hljs-section: #005cc5;
  --mdr-hljs-bullet: #735c0f;
  --mdr-hljs-addition-fg: #22863a;
  --mdr-hljs-addition-bg: #f0fff4;
  --mdr-hljs-deletion-fg: #b31d28;
  --mdr-hljs-deletion-bg: #ffeef0;
}

:root[data-theme="dark"] {
  --mdr-code-chip-bg: #151b23;
  --mdr-code-btn-hover-bg: #21262d;
  --mdr-code-copied-fg: #3fb950;

  --mdr-hljs-fg: #c9d1d9;
  --mdr-hljs-keyword: #ff7b72;
  --mdr-hljs-title: #d2a8ff;
  --mdr-hljs-attr: #79c0ff;
  --mdr-hljs-string: #a5d6ff;
  --mdr-hljs-built-in: #ffa657;
  --mdr-hljs-comment: #8b949e;
  --mdr-hljs-name: #7ee787;
  --mdr-hljs-section: #1f6feb;
  --mdr-hljs-bullet: #f2cc60;
  --mdr-hljs-addition-fg: #aff5b4;
  --mdr-hljs-addition-bg: #033a16;
  --mdr-hljs-deletion-fg: #ffdcd7;
  --mdr-hljs-deletion-bg: #67060c;
}

/* ---------------------------------------------------------------------- */
/* Inline code chip                                                        */
/* ---------------------------------------------------------------------- */

.markdown-body code,
.markdown-body tt {
  padding: 0.2em 0.4em;
  margin: 0;
  font-size: 85%;
  white-space: break-spaces;
  color: var(--mdr-code-fg);
  background-color: var(--mdr-code-bg);
  border-radius: 6px;
  font-family: "Cascadia Code", "Cascadia Mono", Consolas, monospace;
}

/* ---------------------------------------------------------------------- */
/* Code blocks                                                             */
/* ---------------------------------------------------------------------- */

.markdown-body pre {
  position: relative;
  margin-top: 0;
  margin-bottom: 16px;
  padding: 16px;
  overflow: auto;
  font-size: 85%;
  line-height: 1.45;
  color: var(--mdr-fg);
  background-color: var(--mdr-bg-subtle);
  border-radius: 6px;
  font-family: "Cascadia Code", "Cascadia Mono", Consolas, monospace;
  tab-size: 4;
  -moz-tab-size: 4;
}

.markdown-body pre code,
.markdown-body pre tt {
  display: inline;
  padding: 0;
  margin: 0;
  overflow: visible;
  line-height: inherit;
  word-wrap: normal;
  /* Higher specificity than `.markdown-body code` above (which sets the
     inline-code chip's --mdr-code-fg color) — fenced code blocks are
     governed by --mdr-fg/the highlight.js token colors, not the inline
     "code" semantic role, so restore inheritance from the surrounding
     `pre` (color: var(--mdr-fg)) explicitly. */
  color: inherit;
  background-color: transparent;
  border: 0;
  font-size: 100%;
  white-space: pre;
}

/* highlight.js applies this class after enhanceCode() runs. Before that,
   the block is still perfectly readable in the plain foreground color. */
.markdown-body pre code.hljs {
  color: var(--mdr-hljs-fg);
  background-color: transparent;
  padding: 0;
}

.markdown-body .hljs-doctag,
.markdown-body .hljs-keyword,
.markdown-body .hljs-meta .hljs-keyword,
.markdown-body .hljs-template-tag,
.markdown-body .hljs-template-variable,
.markdown-body .hljs-type,
.markdown-body .hljs-variable.language_ {
  color: var(--mdr-hljs-keyword);
}

.markdown-body .hljs-title,
.markdown-body .hljs-title.class_,
.markdown-body .hljs-title.class_.inherited__,
.markdown-body .hljs-title.function_ {
  color: var(--mdr-hljs-title);
}

.markdown-body .hljs-attr,
.markdown-body .hljs-attribute,
.markdown-body .hljs-literal,
.markdown-body .hljs-meta,
.markdown-body .hljs-number,
.markdown-body .hljs-operator,
.markdown-body .hljs-selector-attr,
.markdown-body .hljs-selector-class,
.markdown-body .hljs-selector-id,
.markdown-body .hljs-variable {
  color: var(--mdr-hljs-attr);
}

.markdown-body .hljs-meta .hljs-string,
.markdown-body .hljs-regexp,
.markdown-body .hljs-string {
  color: var(--mdr-hljs-string);
}

.markdown-body .hljs-built_in,
.markdown-body .hljs-symbol {
  color: var(--mdr-hljs-built-in);
}

.markdown-body .hljs-code,
.markdown-body .hljs-comment,
.markdown-body .hljs-formula {
  color: var(--mdr-hljs-comment);
}

.markdown-body .hljs-name,
.markdown-body .hljs-quote,
.markdown-body .hljs-selector-pseudo,
.markdown-body .hljs-selector-tag {
  color: var(--mdr-hljs-name);
}

.markdown-body .hljs-subst {
  color: var(--mdr-hljs-fg);
}

.markdown-body .hljs-section {
  color: var(--mdr-hljs-section);
  font-weight: 700;
}

.markdown-body .hljs-bullet {
  color: var(--mdr-hljs-bullet);
}

.markdown-body .hljs-emphasis {
  color: var(--mdr-hljs-fg);
  font-style: italic;
}

.markdown-body .hljs-strong {
  color: var(--mdr-hljs-fg);
  font-weight: 700;
}

.markdown-body .hljs-addition {
  color: var(--mdr-hljs-addition-fg);
  background-color: var(--mdr-hljs-addition-bg);
}

.markdown-body .hljs-deletion {
  color: var(--mdr-hljs-deletion-fg);
  background-color: var(--mdr-hljs-deletion-bg);
}

/* ---------------------------------------------------------------------- */
/* Code block toolbar: language label + copy button                      */
/* ---------------------------------------------------------------------- */

.markdown-body .mdr-code-toolbar {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.12s ease-in-out;
}

.markdown-body pre:hover .mdr-code-toolbar,
.markdown-body pre:focus-within .mdr-code-toolbar {
  opacity: 1;
}

@media (hover: none) {
  /* Touch devices have no hover: keep the toolbar reachable. */
  .markdown-body .mdr-code-toolbar {
    opacity: 1;
  }
}

.markdown-body .mdr-code-lang {
  font-family: -apple-system, "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  font-size: 12px;
  line-height: 1.4;
  color: var(--mdr-fg-muted);
  background-color: var(--mdr-code-chip-bg);
  border: 1px solid var(--mdr-border);
  border-radius: 6px;
  padding: 2px 8px;
  user-select: none;
}

.markdown-body .mdr-code-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--mdr-border);
  border-radius: 6px;
  background-color: var(--mdr-code-chip-bg);
  color: var(--mdr-fg-muted);
  cursor: pointer;
}

.markdown-body .mdr-code-copy:hover {
  background-color: var(--mdr-code-btn-hover-bg);
  color: var(--mdr-fg);
}

.markdown-body .mdr-code-copy:focus-visible {
  outline: 2px solid var(--mdr-accent);
  outline-offset: 2px;
}

.markdown-body .mdr-code-copy.is-copied {
  color: var(--mdr-code-copied-fg);
}

.markdown-body .mdr-code-copy-icon {
  width: 16px;
  height: 16px;
  background-color: currentColor;
  -webkit-mask-image: url("../vendor/octicons/copy.svg");
  mask-image: url("../vendor/octicons/copy.svg");
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: 16px 16px;
  mask-size: 16px 16px;
}

.markdown-body .mdr-code-copy.is-copied .mdr-code-copy-icon {
  -webkit-mask-image: url("../vendor/octicons/check.svg");
  mask-image: url("../vendor/octicons/check.svg");
}

.markdown-body .mdr-code-copy-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------------- */
/* KaTeX error styles                                                      */
/* ---------------------------------------------------------------------- */

.markdown-body .katex-error,
.markdown-body .mdr-math-error {
  color: var(--mdr-alert-caution) !important;
  font-family: "Cascadia Code", "Cascadia Mono", Consolas, monospace;
}

.markdown-body .mdr-math-error {
  display: inline-block;
  font-size: 85%;
  white-space: pre-wrap;
  cursor: help;
}

/* ---------------------------------------------------------------------- */
/* Mermaid error styles                                                    */
/* ---------------------------------------------------------------------- */

.markdown-body pre.mdr-mermaid-error {
  display: block;
  margin: 16px 0;
  padding: 12px 16px;
  overflow-x: auto;
  color: var(--mdr-fg);
  background-color: var(--mdr-bg-subtle);
  border: 1px solid var(--mdr-alert-caution);
  border-radius: 6px;
  font-family: "Cascadia Code", "Cascadia Mono", Consolas, monospace;
  font-size: 85%;
  white-space: pre-wrap;
}

.markdown-body pre.mdr-mermaid-error .mdr-mermaid-error-message {
  display: block;
  margin-bottom: 8px;
  color: var(--mdr-alert-caution);
  font-weight: 600;
  font-family: -apple-system, "Segoe UI Variable Text", "Segoe UI", system-ui, sans-serif;
  white-space: normal;
}

.markdown-body pre.mdr-mermaid-error .mdr-mermaid-error-source {
  display: block;
  color: var(--mdr-fg-muted);
}

/* ---------------------------------------------------------------------- */
/* Print                                                                   */
/* ---------------------------------------------------------------------- */

@media print {
  .markdown-body .mdr-code-toolbar {
    display: none;
  }

  .markdown-body pre {
    white-space: pre-wrap;
    word-wrap: break-word;
  }
}