/* ============================================================
   code.css
   Code highlighting and code block UI for Firefly Hexo theme
   ============================================================ */

/* Hexo figure.highlight wrapper */
figure.highlight {
  margin: 1rem 0;
  border-left: 3px solid var(--primary);
  background: var(--btn-regular-bg);
  position: relative;
}
figure.highlight table {
  width: 100%;
  border-collapse: collapse;
  margin: 0;
}
figure.highlight .gutter {
  width: 2.5rem;
  text-align: right;
  padding: 0;
  border-right: 1px solid var(--line-divider);
  user-select: none;
}
figure.highlight .gutter pre {
  padding: 1rem 0.5rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--text-tertiary);
  background: transparent;
  margin: 0;
}
figure.highlight .code {
  padding: 0;
}
figure.highlight .code pre {
  padding: 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: transparent;
  margin: 0;
  overflow-x: auto;
}

/* Code block wrapper (for our JS-injected wrapper) */
.code-block-wrapper {
  position: relative;
  margin: 1rem 0;
  border-radius: var(--radius-large);
  overflow: hidden;
  border: 1px solid var(--line-divider);
  background: var(--btn-regular-bg);
}
.code-block-wrapper pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
}
.code-block-wrapper figure.highlight {
  margin: 0;
  border: none;
  border-radius: 0;
}

/* Language badge */
.code-language-badge {
  position: absolute;
  top: 0;
  right: 0.5rem;
  padding: 0.125rem 0.5rem;
  background: var(--btn-regular-bg);
  border-radius: 0 0 var(--radius-small) var(--radius-small);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* Copy button */
.code-copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--line-divider);
  border-radius: var(--radius-small);
  background: var(--card-bg);
  color: var(--text-tertiary);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--duration-fast);
  opacity: 0;
  z-index: 5;
}
figure.highlight:hover .code-copy-btn { opacity: 1; }
.code-block-wrapper:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { color: var(--primary); border-color: var(--primary); }
.code-copy-btn.copied { color: oklch(0.65 0.15 140); border-color: oklch(0.65 0.15 140); }

/* Collapsible code */
.code-collapsible {
  position: relative;
}
.code-collapsible .code-overflow-gradient {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4rem;
  background: linear-gradient(to bottom, transparent, var(--card-bg));
  pointer-events: none;
}
.code-collapsible .code-expand-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.5rem;
  width: 100%;
  border: none;
  background: var(--btn-regular-bg);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: all var(--duration-fast);
}
.code-collapsible .code-expand-btn:hover {
  background: var(--btn-plain-bg-hover);
  color: var(--primary);
}
.code-collapsible.expanded .code-overflow-gradient { display: none; }
.code-collapsible.expanded .code-expand-btn { display: none; }

/* Highlight.js themes integration */
pre code.hljs { display: block; overflow-x: auto; padding: 1rem; }

/* Diff / line numbers */
/* Diff / line numbers */
.hljs-ln { border-collapse: collapse; }
.hljs-ln td { padding: 0 0.5rem; }
.hljs-ln-numbers {
  text-align: right;
  color: var(--text-tertiary);
  border-right: 1px solid var(--line-divider);
  user-select: none;
}

/* ============================================================
   Syntax Highlighting Colors (OKLCH-based)
   Supports Hexo server-side highlight and Highlight.js classes
   ============================================================ */

/* Comments & punctuation */
figure.highlight .comment,
.hljs-comment,
figure.highlight .quote,
.hljs-quote {
  color: var(--text-tertiary);
  font-style: italic;
}

/* Keywords */
figure.highlight .keyword,
.hljs-keyword,
figure.highlight .selector-tag,
.hljs-selector-tag,
figure.highlight .addition,
.hljs-addition {
  color: oklch(0.55 0.18 10); /* rich red/pink */
  font-weight: 600;
}
.dark figure.highlight .keyword,
.dark .hljs-keyword,
.dark figure.highlight .selector-tag,
.dark .hljs-selector-tag,
.dark figure.highlight .addition,
.dark .hljs-addition {
  color: oklch(0.70 0.16 10); /* bright red/pink */
}

/* Strings */
figure.highlight .string,
.hljs-string,
figure.highlight .meta .string,
.hljs-meta .string,
figure.highlight .doctag,
.hljs-doctag {
  color: oklch(0.48 0.14 140); /* rich green */
}
.dark figure.highlight .string,
.dark .hljs-string,
.dark figure.highlight .meta .string,
.dark .hljs-meta .string,
.dark figure.highlight .doctag,
.dark .hljs-doctag {
  color: oklch(0.75 0.14 140); /* bright green */
}

/* Numbers & Literals */
figure.highlight .number,
.hljs-number,
figure.highlight .literal,
.hljs-literal,
figure.highlight .variable,
.hljs-variable,
figure.highlight .template-variable,
.hljs-template-variable {
  color: oklch(0.50 0.15 65); /* rich orange/yellow */
}
.dark figure.highlight .number,
.dark .hljs-number,
.dark figure.highlight .literal,
.dark .hljs-literal,
.dark figure.highlight .variable,
.dark .hljs-variable,
.dark figure.highlight .template-variable,
.dark .hljs-template-variable {
  color: oklch(0.72 0.15 65); /* bright orange */
}

/* Titles, Function Names, Classes */
figure.highlight .title,
.hljs-title,
figure.highlight .attr,
.hljs-attr,
figure.highlight .attribute,
.hljs-attribute,
figure.highlight .section,
.hljs-section,
figure.highlight .name,
.hljs-name {
  color: oklch(0.48 0.16 260); /* rich blue */
}
.dark figure.highlight .title,
.dark .hljs-title,
.dark figure.highlight .attr,
.dark .hljs-attr,
.dark figure.highlight .attribute,
.dark .hljs-attribute,
.dark figure.highlight .section,
.dark .hljs-section,
.dark figure.highlight .name,
.dark .hljs-name {
  color: oklch(0.72 0.14 260); /* bright blue */
}

/* Built-ins, Types */
figure.highlight .built_in,
.hljs-built_in,
figure.highlight .type,
.hljs-type,
figure.highlight .class,
.hljs-class,
figure.highlight .selector-class,
.hljs-selector-class,
figure.highlight .selector-id,
.hljs-selector-id {
  color: oklch(0.46 0.15 200); /* rich teal/cyan */
}
.dark figure.highlight .built_in,
.dark .hljs-built_in,
.dark figure.highlight .type,
.dark .hljs-type,
.dark figure.highlight .class,
.dark .hljs-class,
.dark figure.highlight .selector-class,
.dark .hljs-selector-class,
.dark figure.highlight .selector-id,
.dark .hljs-selector-id {
  color: oklch(0.70 0.15 200); /* bright teal */
}

/* Regexp & Special Characters */
figure.highlight .regexp,
.hljs-regexp,
figure.highlight .link,
.hljs-link,
figure.highlight .meta,
.hljs-meta,
figure.highlight .symbol,
.hljs-symbol,
figure.highlight .bullet,
.hljs-bullet {
  color: oklch(0.48 0.16 330); /* rich magenta */
}
.dark figure.highlight .regexp,
.dark .hljs-regexp,
.dark figure.highlight .link,
.dark .hljs-link,
.dark figure.highlight .meta,
.dark .hljs-meta,
.dark figure.highlight .symbol,
.dark .hljs-symbol,
.dark figure.highlight .bullet,
.dark .hljs-bullet {
  color: oklch(0.72 0.16 330); /* bright magenta */
}

/* Deletions (diff blocks) */
figure.highlight .deletion,
.hljs-deletion {
  color: oklch(0.50 0.18 20); /* rich dark red */
  background: oklch(0.50 0.18 20 / 0.1);
  display: inline-block;
  width: 100%;
}
.dark figure.highlight .deletion,
.dark .hljs-deletion {
  color: oklch(0.70 0.16 20); /* bright red */
  background: oklch(0.70 0.16 20 / 0.15);
}