/* Markdown Viewer & Editor — стили только этого инструмента */
.mdv { --mdv-h: clamp(420px, 68vh, 760px); --gut: 46px; }
.mdv-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 16px 8px; }
.mdv-tabs { display: inline-flex; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.mdv-tab { font: 500 14px var(--font); color: var(--ink); background: var(--surface); border: 0; border-left: 1px solid var(--border); padding: 0 14px; height: 36px; cursor: pointer; }
.mdv-tab:first-child { border-left: 0; }
.mdv-tab[aria-pressed="true"] { background: var(--blue-tint); color: var(--blue); font-weight: 600; }
.mdv-restored { margin: 0 16px 8px; padding: 4px 4px 4px 12px; border-radius: 10px; background: var(--blue-tint); display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.mdv-restored[hidden] { display: none; }

.mdv-toolbar { display: flex; gap: 2px; align-items: center; padding: 6px 16px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); overflow-x: auto; scrollbar-width: thin; background: var(--canvas); }
.mdv-toolbar button { flex: none; font: 500 14px var(--font); color: var(--ink); background: none; border: 1px solid transparent; border-radius: 8px; height: 34px; min-width: 34px; padding: 0 8px; cursor: pointer; white-space: nowrap; }
.mdv-toolbar button:hover { background: var(--surface); border-color: var(--border); }
.mdv-toolbar code { font-size: 12px; background: none; }
.mdv-toolbar .sep { flex: none; width: 1px; height: 20px; background: var(--border); margin: 0 4px; }

.mdv-panes { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.mdv[data-layout="editor"] .mdv-panes, .mdv[data-layout="preview"] .mdv-panes { grid-template-columns: minmax(0, 1fr); }
.mdv[data-layout="editor"] .mdv-prev, .mdv[data-layout="preview"] .mdv-edit,
.mdv[data-layout="preview"] .mdv-toolbar { display: none; }
.mdv-edit, .mdv-prev { min-width: 0; position: relative; }
.mdv-prev { border-left: 1px solid var(--border); }
.mdv[data-layout="preview"] .mdv-prev { border-left: 0; }

/* редактор: textarea поверх подсвеченной копии текста */
.mdv-editor { position: relative; height: var(--mdv-h); background: var(--code-bg); }
.mdv-ta, .mdv-hl-inner { font: 400 14px/1.6 var(--mono); letter-spacing: 0; tab-size: 4; white-space: pre-wrap; overflow-wrap: anywhere; word-break: normal; }
.mdv-ta {
  position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; border: 0; border-radius: 0; resize: none; outline: none;
  padding: 12px 14px 12px var(--gut); background: transparent; color: transparent; caret-color: var(--ink); overflow-y: auto; overflow-x: hidden; z-index: 1;
}
.mdv-ta::placeholder { color: var(--muted); }
.mdv-ta::selection { background: rgba(36, 81, 232, .25); color: transparent; }
.mdv-ta:focus-visible { box-shadow: inset 0 0 0 2px rgba(36, 81, 232, .35); }
.mdv-hl { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.mdv-hl-inner { padding: 12px 14px 12px var(--gut); color: var(--ink); counter-reset: ln; will-change: transform; }
.mdv-hl-inner > div { position: relative; counter-increment: ln; min-height: 1.6em; }
.mdv-hl-inner > div::before { content: counter(ln); position: absolute; left: calc(-1 * var(--gut)); width: calc(var(--gut) - 14px); text-align: right; color: var(--muted); opacity: .6; font-size: 12px; }
.mdv-editor::before { content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: calc(var(--gut) - 8px); border-right: 1px solid var(--border); background: var(--canvas); }
.mdv-editor.plain .mdv-ta { color: var(--ink); }
.mdv-editor.plain .mdv-hl { display: none; }
.mdv-editor.plain::before { display: none; }
.mdv-editor.plain .mdv-ta { padding-left: 14px; }
.mdv-ta.dragover { background: var(--ok-tint); }
.t-h { color: var(--blue); font-weight: 700; }
.t-b { font-weight: 700; }
.t-i { font-style: italic; }
.t-s { text-decoration: line-through; color: var(--muted); }
.t-code, .t-fence { color: #b5427a; }
.t-fence { color: var(--muted); }
.t-link { color: var(--blue); }
.t-url, .t-tag, .t-p, .t-hr { color: var(--muted); }
.t-q, .t-li { color: var(--teal-dark); font-weight: 600; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .t-code { color: #f39fc5; } } :root[data-theme="dark"] .t-code { color: #f39fc5; }

/* превью */
.mdv-prev .mdv-busy { position: absolute; top: 8px; right: 12px; z-index: 2; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 2px 8px; }
.mdv-preview { position: relative; height: var(--mdv-h); overflow: auto; padding: 16px 24px; background: var(--surface); }
.mdv-preview:focus-visible { box-shadow: inset var(--focus); border-radius: 0; }
.mdv-empty { color: var(--muted); }
.mdv-export { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 16px; border-top: 1px solid var(--border); }

/* GitHub-стиль (тема — системная) */
.markdown-body { font: 16px/1.6 var(--font); color: var(--ink); overflow-wrap: break-word; }
.markdown-body > *:first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 { margin: 24px 0 16px; font-weight: 600; line-height: 1.25; letter-spacing: 0; }
.markdown-body h1 { font-size: 2em; }
.markdown-body h2 { font-size: 1.5em; }
.markdown-body h3 { font-size: 1.25em; }
.markdown-body h4 { font-size: 1em; }
.markdown-body h5 { font-size: .875em; }
.markdown-body h6 { font-size: .85em; color: var(--muted); }
.markdown-body p, .markdown-body blockquote, .markdown-body ul, .markdown-body ol, .markdown-body table, .markdown-body pre, .markdown-body details, .markdown-body dl { margin: 0 0 16px; }
.markdown-body ul, .markdown-body ol { padding-left: 2em; }
.markdown-body li + li { margin-top: .25em; }
.markdown-body ul:has(> li > input[type="checkbox"]) { list-style: none; }
.markdown-body li > input[type="checkbox"] { margin: 0 .35em .2em -1.4em; vertical-align: middle; }
.markdown-body blockquote { padding: 0 1em; color: var(--muted); border-left: .25em solid var(--border); }
.markdown-body code, .markdown-body kbd, .markdown-body pre { font-family: var(--mono); font-size: 85%; }
.markdown-body code { padding: .2em .4em; background: rgba(129, 139, 152, .15); border-radius: 6px; }
.markdown-body pre { padding: 16px; overflow: auto; line-height: 1.45; background: var(--canvas); border-radius: 8px; }
.markdown-body pre code { padding: 0; background: none; font-size: 100%; }
.markdown-body pre code.hljs { padding: 0; background: none; }
.markdown-body kbd { padding: 2px 5px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 6px; background: var(--canvas); }
.markdown-body hr { height: .25em; margin: 24px 0; padding: 0; background: var(--border); border: 0; }
.markdown-body table { border-collapse: collapse; display: block; width: max-content; max-width: 100%; overflow: auto; }
.markdown-body th, .markdown-body td { padding: 6px 13px; border: 1px solid var(--border); }
.markdown-body th { font-weight: 600; }
.markdown-body tr:nth-child(2n) { background: var(--canvas); }
.markdown-body img { max-width: 100%; }
.markdown-body a { color: var(--blue); }
.markdown-body .footnotes { font-size: 85%; color: var(--muted); border-top: 1px solid var(--border); padding-top: 8px; }
.markdown-body .img-relative { color: var(--muted); font-style: italic; text-decoration: underline dotted; cursor: help; }
.markdown-body .math-display { display: block; margin: 0 0 16px; text-align: center; overflow-x: auto; overflow-y: hidden; }
.markdown-body .math-err { color: var(--danger); font-family: var(--mono); font-size: 90%; cursor: help; }
.markdown-body .mermaid-block { margin: 0 0 16px; text-align: center; overflow-x: auto; white-space: pre-wrap; font-family: var(--mono); font-size: 13px; color: var(--muted); }
.markdown-body .mermaid-block svg { max-width: 100%; height: auto; }
.markdown-body .md-err { color: var(--danger); background: var(--danger-tint); border-radius: 8px; padding: 8px 12px; font: 14px var(--font); text-align: left; }
.markdown-body details.front-matter { border: 1px solid var(--border); border-radius: 8px; padding: 6px 12px; }
.markdown-body details.front-matter summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.markdown-body details.front-matter pre { margin: 8px 0 0; }
.markdown-body.gh h1, .markdown-body.gh h2 { padding-bottom: .3em; border-bottom: 1px solid var(--border); }
/* Plain */
.markdown-body.plain { font-family: Georgia, "Times New Roman", serif; font-size: 17px; line-height: 1.65; }
.markdown-body.plain h1, .markdown-body.plain h2 { border: 0; }
.markdown-body.plain table, .markdown-body.plain th, .markdown-body.plain td { border-color: transparent; }
.markdown-body.plain th { border-bottom: 1px solid var(--ink); }
.markdown-body.plain tr:nth-child(2n) { background: none; }
.markdown-body.plain pre { background: none; border: 1px solid var(--border); }

/* mobile: вкладки Editor | Preview */
@media (max-width: 768px) {
  .mdv { --mdv-h: 60vh; --gut: 38px; }
  .mdv-bar { padding: 10px 12px 6px; }
  .mdv-tab[data-layout-btn="split"] { display: none; }
  .mdv-tab[data-layout-btn="editor"] { border-left: 0; }
  .mdv-tab { height: 40px; padding: 0 18px; }
  .mdv-toolbar { padding: 6px 12px; }
  .mdv-toolbar button { height: 40px; min-width: 40px; }
  .mdv-panes { grid-template-columns: minmax(0, 1fr) !important; }
  .mdv[data-layout="split"] .mdv-prev { display: none; }
  .mdv-prev { border-left: 0; }
  .mdv-preview { padding: 12px 14px; }
  .mdv-export { padding: 10px 12px; }
  .mdv-ta { font-size: 16px; } /* без автозума iOS */
  .mdv-hl-inner { font-size: 16px; }
}

/* печать: только превью, светлая тема */
@media print {
  :root { color-scheme: light; }
  body * { visibility: hidden; }
  .mdv-preview, .mdv-preview * { visibility: visible; }
  .mdv-edit, .mdv-toolbar, .mdv-bar, .mdv-export, .options, .notice, .mdv-busy { display: none !important; }
  .mdv-prev, .mdv-edit, .tool { position: static !important; }
  .mdv, .tool, .mdv-panes, .mdv-prev { display: block !important; border: 0 !important; box-shadow: none !important; }
  .mdv-preview { position: absolute; left: 0; top: 0; width: 100%; height: auto !important; overflow: visible !important; padding: 0;
    --ink: #1f2328; --muted: #59636e; --border: #d1d9e0; --canvas: #f6f8fa; --surface: #fff; --blue: #0969da; background: #fff; color: #1f2328; }
  .mdv-preview pre { white-space: pre-wrap; }
  .page-head, .breadcrumbs, .content, .related, .tool-foot, .site-footer, .site-header { display: none !important; }
}