/* Shared LIGHT theme for server-rendered Markdown (`.article-content`).
   Layout/overflow rules come from chat/css/chat-rich-content.css (specificity-0
   :where() selectors); this file only provides the THEME so every light surface
   (blog article, wiki page, wiki live preview) renders rich content identically. */

.article-content {
  color: var(--text-color);
  font-size: 1.02rem;
  line-height: 1.75;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
  margin: 1.8rem 0 0.8rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-emphasis);
}

.article-content h1:first-child,
.article-content h2:first-child,
.article-content h3:first-child {
  margin-top: 0;
}

.article-content h2 {
  font-size: 1.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(var(--primary-rgb), 0.14);
}

.article-content h3 {
  font-size: 1.3rem;
}

.article-content h4 {
  font-size: 1.1rem;
}

.article-content p {
  margin: 0 0 1.1rem;
}

.article-content a {
  color: var(--primary-dark);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.article-content a:hover {
  color: var(--accent-color);
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.1rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.35rem;
}

.article-content blockquote {
  margin: 1.2rem 0;
  padding: 0.8rem 1.2rem;
  border-left: 4px solid var(--primary-color);
  background: var(--primary-light);
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
  color: var(--text-color);
}

.article-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.2rem auto;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

.article-content hr {
  margin: 2rem 0;
  border: 0;
  border-top: 1px solid rgba(var(--primary-rgb), 0.18);
}

/* Inline code : light chip. Code BLOCKS stay dark (atom-one-dark, like chat). */
.article-content code {
  padding: 0.12rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.88em;
  color: var(--primary-dark);
  background: var(--primary-light);
  border: 1px solid rgba(var(--primary-rgb), 0.18);
  border-radius: 6px;
}

.article-content pre {
  overflow: auto;
  margin: 1.2rem 0;
  padding: 14px;
  background: #081824;
  border: 1px solid rgba(7, 21, 33, 0.4);
  border-radius: var(--border-radius-md);
}

.article-content pre code {
  padding: 0;
  color: #dbeafe;
  background: transparent;
  border: 0;
}

/* Tables : light */
.article-content .table-wrap {
  margin: 1.2rem 0;
  border: 1px solid rgba(var(--primary-rgb), 0.14);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

.article-content table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.article-content th,
.article-content td {
  padding: 0.6rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid rgba(var(--primary-rgb), 0.1);
}

.article-content thead th {
  font-weight: 700;
  color: var(--text-emphasis);
  background: var(--primary-light);
}

.article-content tbody tr:hover {
  background: rgba(var(--primary-rgb), 0.05);
}

/* Callouts : light variants (structure from chat-utils.js transformCallouts) */
.article-content .md-callout {
  margin: 1.2rem 0;
  padding: 0.9rem 1.1rem;
  border-radius: var(--border-radius-md);
  border: 1px solid;
  background: #fff;
}

.article-content .md-callout-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  font-weight: 700;
  font-size: 0.92rem;
}

.article-content .md-callout-icon {
  display: inline-flex;
  width: 1.1rem;
  height: 1.1rem;
}

.article-content .md-callout-body > :last-child {
  margin-bottom: 0;
}

.article-content .md-callout-note {
  border-color: rgba(var(--primary-rgb), 0.35);
  background: var(--primary-light);
}

.article-content .md-callout-note .md-callout-title {
  color: var(--primary-dark);
}

.article-content .md-callout-tip {
  border-color: rgba(25, 131, 111, 0.35);
  background: #e6f6f2;
}

.article-content .md-callout-tip .md-callout-title {
  color: var(--secondary-color);
}

.article-content .md-callout-important {
  border-color: rgba(41, 86, 215, 0.35);
  background: #e9effc;
}

.article-content .md-callout-important .md-callout-title {
  color: var(--accent-color);
}

.article-content .md-callout-warning {
  border-color: rgba(217, 145, 22, 0.4);
  background: #fdf3e0;
}

.article-content .md-callout-warning .md-callout-title {
  color: #a86e0d;
}

.article-content .md-callout-danger {
  border-color: rgba(200, 40, 40, 0.35);
  background: #fdeaea;
}

.article-content .md-callout-danger .md-callout-title {
  color: #b02525;
}

/* Mermaid / Chart.js blocks : light surfaces */
.article-content .mermaid-block,
.article-content .chart-block {
  margin: 1.4rem 0;
  padding: 1.2rem;
  background: #fff;
  border: 1px solid rgba(var(--primary-rgb), 0.14);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
}

.article-content .mermaid-error,
.article-content .chart-error {
  margin: 1.2rem 0;
  padding: 0.9rem 1.1rem;
  color: #b02525;
  background: #fdeaea;
  border: 1px solid rgba(200, 40, 40, 0.35);
  border-radius: var(--border-radius-md);
}

.article-content .mermaid-pending,
.article-content .chart-pending {
  display: none;
}

/* Copy / PNG buttons : visible on light surfaces */
.article-content .code-block {
  position: relative;
}

.article-content .code-copy-btn,
.article-content .mermaid-png-btn,
.article-content .chart-png-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.article-content .code-block:hover .code-copy-btn,
.article-content .mermaid-block:hover .mermaid-png-btn,
.article-content .chart-block:hover .chart-png-btn {
  opacity: 1;
}

.article-content .code-copy-btn:hover,
.article-content .mermaid-png-btn:hover,
.article-content .chart-png-btn:hover {
  color: var(--primary-dark);
  border-color: var(--primary-color);
}

.article-content .code-copy-btn svg,
.article-content .mermaid-png-btn svg,
.article-content .chart-png-btn svg {
  width: 0.9rem;
  height: 0.9rem;
}

@media (max-width: 575.98px) {
  .article-content .code-copy-btn,
  .article-content .mermaid-png-btn,
  .article-content .chart-png-btn {
    opacity: 1;
  }
}