/* Styles for embedded Markdown (showmd)
   Uses site CSS variables so day/night theme changes are automatic.
   Applied to the container with id #md-embed inside .carbox.li3-box
*/

#md-embed{
  font-family: "Microsoft YaHei", "Noto Sans", Arial, sans-serif;
  line-height: 1.8;
  /* Use headerFont so markdown text matches card text and remains readable
     when the site switches between day/night variables. */
  color: var(--headerFont);
  background: transparent; /* container (.carbox) provides card background */
  padding: 18px;
  box-sizing: border-box;
  transition: color .25s ease, background .25s ease;
}

#md-embed p { text-indent: 0; margin: 0 0 1em; color: var(--headerFont); }
#md-embed h1, #md-embed h2, #md-embed h3 {
  font-family: "Arial", "Microsoft YaHei", "Noto Sans", sans-serif;
  font-weight: 600;
  margin: 0.6em 0 0.4em;
  color: var(--headerFont);
}

#md-embed a { color: var(--mainColor); }

#md-embed pre {
  background: var(--textblock-bg);
  /* pre/code text should match headerFont for contrast on card backgrounds */
  color: var(--headerFont);
  padding: 12px;
  overflow: auto;
  border-radius: 6px;
  border: 1px solid var(--borderline);
}

#md-embed code { color: var(--headerFont); background: transparent; padding: .15em .3em; border-radius: 4px; }

#md-embed table.tableStyle { font-family: inherit; font-size: 13px; color: var(--headerFont); border-collapse: collapse; width:100%; }
#md-embed table.tableStyle th, #md-embed table.tableStyle td { padding:8px; border:1px solid var(--borderline); }

.md-loading { color: var(--headerFont); opacity: .85; }

/* KaTeX: force math to inherit site text color so formulas respond to theme */
/* KaTeX: force math to inherit site text color so formulas respond to theme */
#md-embed .katex,
#md-embed .katex * {
  color: var(--headerFont) !important;
}

/* Ensure inline KaTeX remains inline and aligned with text. Block/display math (katex-display)
   will be wrapped by JS into .md-katex-wrap and displayed as block to allow scrolling. */
#md-embed .katex { display: inline-block; vertical-align: baseline; }
.md-katex-wrap .katex { display: block; }

/* Prism: make sure background and text colors follow theme variables */
#md-embed pre[class*="language-"],
#md-embed code[class*="language-"] {
  background: var(--textblock-bg) !important;
  color: var(--headerFont) !important;
  border-color: var(--borderline) !important;
}

/* Images and iframes responsiveness */
#md-embed img, #md-embed iframe{ max-width: 100%; height: auto; display:block; margin: .6em 0; }

/* Prevent long words/URLs from overflowing on small screens */
#md-embed{ word-break: break-word; overflow-wrap: anywhere; }

/* Wrappers used by showmd.js to provide touch-friendly horizontal scrolling */
.md-code-wrap, .md-table-wrap, .md-katex-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.md-code-wrap pre { margin: 0; }
.md-code-wrap pre code { display: block; }

/* Ensure wrappers take the full available width and don't grow beyond the parent container */
.md-code-wrap, .md-table-wrap, .md-katex-wrap { display: block; width: 100%; box-sizing: border-box; max-width: 100%; }

/* Make inline code wrap on narrow viewports instead of forcing overflow */
#md-embed code:not([class*="language-"]) { white-space: break-spaces; word-break: break-word; }

/* KaTeX display wrappers: allow formulas to scroll horizontally on tiny screens */
.md-katex-wrap { margin: .5em 0; }
/* Keep the formula as a single line inside the wrapper so it can be scrolled horizontally
  rather than overflowing the card. The wrapper itself constrains the width to its parent. */
.md-katex-wrap { /* ensure wrapper itself won't expand beyond parent and will allow horizontal scroll */
  width: 100%;
  max-width: calc(100% - 6px); /* conservative: leave small space to avoid tiny overflow */
  box-sizing: border-box;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  white-space: nowrap; /* keep contents on a single line */
  padding-right: 6px; /* small insurance padding so child edges don't touch outer boundary */
}
.md-katex-wrap .katex { display: inline-block; white-space: nowrap; max-width: none; vertical-align: baseline; }
.md-katex-wrap .katex .katex-html { white-space: nowrap !important; }

/* Small safeguard: prevent child transforms/margins from visually escaping the wrapper */
.md-katex-wrap .katex, .md-katex-wrap .katex * { box-sizing: border-box; }

/* Also handle KaTeX's native display class in case JS wrapper isn't present */
#md-embed .katex-display,
#md-embed .katex-display .katex {
  display: block;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow-x: auto; /* 公式左右滑动 */
  overflow-y: auto; /* 公式左右滑动 */
  -webkit-overflow-scrolling: touch;
  white-space: nowrap;
}

/* Minimize / visually hide horizontal scrollbars but keep scrolling functional.
   Targets the md wrappers and KaTeX display areas. WebKit, Firefox and IE/Edge handled. */
.md-katex-wrap, .md-code-wrap, .md-table-wrap, #md-embed .katex-display {
  -ms-overflow-style: -ms-autohiding-scrollbar; /* IE/Edge */
  scrollbar-width: thin; /* Firefox */
  scrollbar-color: rgba(0,0,0,0.01) transparent; /* Firefox: thumb + track */
}

/* WebKit browsers: reduce horizontal scrollbar height to 1px and make it nearly transparent */
.md-katex-wrap::-webkit-scrollbar,
.md-code-wrap::-webkit-scrollbar,
.md-table-wrap::-webkit-scrollbar,
#md-embed .katex-display::-webkit-scrollbar {
  height: 1px;
}
.md-katex-wrap::-webkit-scrollbar-track,
.md-code-wrap::-webkit-scrollbar-track,
.md-table-wrap::-webkit-scrollbar-track,
#md-embed .katex-display::-webkit-scrollbar-track {
  background: transparent;
}
.md-katex-wrap::-webkit-scrollbar-thumb,
.md-code-wrap::-webkit-scrollbar-thumb,
.md-table-wrap::-webkit-scrollbar-thumb,
#md-embed .katex-display::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.01);
  border-radius: 1px;
}

/* For dark themes the subtle thumb may be too light; provide a slightly lighter thumb on dark
   using prefers-color-scheme if supported (best-effort) */
@media (prefers-color-scheme: dark) {
  .md-katex-wrap::-webkit-scrollbar-thumb,
  .md-code-wrap::-webkit-scrollbar-thumb,
  .md-table-wrap::-webkit-scrollbar-thumb,
  #md-embed .katex-display::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.01);
  }
  .md-katex-wrap, .md-code-wrap, .md-table-wrap, #md-embed .katex-display {
    scrollbar-color: rgba(255,255,255,0.01) transparent;
  }
}

/* Keep inner html/layout from forcing wrapper overflow */
#md-embed .katex-display .katex * { white-space: nowrap !important; }

/* Tables: allow horizontal scroll on narrow screens while preserving full-width on desktop */
#md-embed table { width: 100%; }
.md-table-wrap { margin: .6em 0; }

/* Small-screen adjustments */
@media (max-width: 600px) {
  #md-embed{ padding: 12px; font-size: 15px; line-height: 1.6; }
  #md-embed pre { padding: 10px; font-size: 13px; }
  #md-embed table.tableStyle th, #md-embed table.tableStyle td { padding: 6px; font-size: 13px; }
}

/* Tablet and phone: scale markdown typography to 80% of desktop for better visual balance
   This applies to all text inside #md-embed so headings and paragraphs scale proportionally. */
@media (max-width: 1250px) {
  /* Use percentage so sizes are exactly 80% of desktop/browser defaults */
  #md-embed { font-size: 80%; line-height: 1.6; }
  /* Code blocks should also scale; keep a readable minimum via font-size in % */
  #md-embed pre { font-size: 80%; }
  #md-embed table.tableStyle th, #md-embed table.tableStyle td { font-size: 80%; }
}

/* Ensure Prism tokens do not use hard-coded colors; fallback to headerFont for contrast */
#md-embed .token.comment, #md-embed .token.prolog, #md-embed .token.doctype, #md-embed .token.cdata { color: var(--headerFont) !important; opacity: .7; }
#md-embed .token.punctuation { color: var(--headerFont) !important; }