:root {
  color-scheme: dark;
  --bg: #15120f;
  --bg-raised: #1c1813;
  --bg-panel: #221d16;
  --ink: #0e0c0a;
  --border: #3a3226;
  --text: #e8e1d3;
  --text-bright: #f5eedd;
  --text-dim: #a89c87;
  --accent: #c9a35d;
  --note: #8a9bb0;
  --tip: #8aa888;
  --warn: #c9a35d;
  --danger: #b5654a;
  --success: #8aa888;
  --important: #a98f6a;
  --link: #c9a35d;
  --mono: "Cascadia Code", "Fira Code", Consolas, "SFMono-Regular", Menlo, monospace;
  --sans: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  --serif: Cambria, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

body { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }
body.resizing { cursor: col-resize; user-select: none; }
body.resizing iframe, body.resizing video { pointer-events: none; }

.app-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 10px 18px;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border);
}

.app-header-title { display: flex; align-items: baseline; gap: 12px; justify-self: start; }

.logo {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--text-bright);
  letter-spacing: 0.3px;
}
.logo em { font-style: italic; }

.tagline { font-size: 12.5px; color: var(--text-dim); }

.site-nav { display: flex; align-items: center; gap: 22px; justify-self: center; }
.site-nav-link {
  font-size: 13px;
  color: var(--text-dim);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.site-nav-link:hover { color: var(--text); }
.site-nav-link.active { color: var(--accent); border-bottom-color: var(--accent); }

.app-header-actions { display: flex; align-items: center; gap: 8px; justify-self: end; }

.badge {
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 10px;
  background: var(--bg-panel);
  border-radius: 999px;
}

.btn {
  font-size: 13px;
  color: var(--text);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: 6px 12px;
  cursor: pointer;
  transition: border-color .15s, color .15s;
  border-radius: 4px;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.active { border-color: var(--accent); color: var(--accent); background: var(--bg-raised); }

.layout {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.content-page {
  flex: 1;
  overflow: auto;
}
.content-page .md-preview {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.pane {
  background: var(--bg);
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 200px;
  overflow: hidden;
}
.pane-editor { flex: 0 0 420px; border-right: 1px solid var(--border); }
.pane-preview { flex: 0 0 560px; border-right: 1px solid var(--border); }
.pane-guide { flex: 1 1 auto; background: var(--bg-raised); }

.resizer {
  flex: 0 0 6px;
  width: 6px;
  cursor: col-resize;
  background: var(--border);
}
.resizer:hover { background: var(--accent); }

.pane-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-raised);
  flex: 0 0 auto;
}
.pane-label-sub { text-transform: none; letter-spacing: 0; opacity: .7; margin-left: 8px; font-family: var(--mono); }

#editor {
  flex: 1;
  width: 100%;
  resize: none;
  border: none;
  outline: none;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.6;
  padding: 16px;
}

.md-preview, .html-output {
  flex: 1;
  overflow: auto;
  padding: 20px 26px;
}

.html-output {
  margin: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--tip);
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg);
}

.guide-scroll { overflow: auto; padding: 14px 16px; flex: 1; }
.guide-scroll h3 {
  font-family: var(--serif);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent);
  margin: 18px 0 8px;
}
.guide-scroll h3:first-child { margin-top: 4px; }
.guide-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.guide-list li { font-size: 12.5px; color: var(--text-dim); line-height: 1.5; }
.guide-list code { color: var(--text); }

/* ---------- Rendered Markdown content ---------- */

.md-preview { font-size: 15px; line-height: 1.65; }
.md-preview > *:first-child { margin-top: 0; }

.md-preview h1, .md-preview h2, .md-preview h3,
.md-preview h4, .md-preview h5, .md-preview h6 {
  font-family: var(--serif);
  color: var(--text-bright);
  font-weight: 600;
  margin: 1.4em 0 .6em;
  line-height: 1.3;
}
.md-preview h1 { font-size: 1.9em; border-bottom: 1px solid var(--border); padding-bottom: .3em; }
.md-preview h2 { font-size: 1.5em; border-bottom: 1px solid var(--border); padding-bottom: .25em; }
.md-preview h3 { font-size: 1.25em; }
.md-preview h4 { font-size: 1.1em; }

.md-anchor {
  margin-left: 8px;
  opacity: 0;
  text-decoration: none;
  color: var(--accent);
  font-size: .8em;
}
.md-preview h1:hover .md-anchor,
.md-preview h2:hover .md-anchor,
.md-preview h3:hover .md-anchor,
.md-preview h4:hover .md-anchor { opacity: 1; }

.md-preview p { margin: .7em 0; }
.md-preview a { color: var(--link); text-decoration: none; border-bottom: 1px solid rgba(201,163,93,.4); }
.md-preview a:hover { border-bottom-color: var(--accent); }

.md-preview strong { color: var(--text-bright); font-weight: 700; }
.md-preview em { color: var(--text-bright); }
.md-preview del { color: var(--text-dim); }
.md-preview mark {
  background: #4a3a1f;
  color: #f3e7c9;
  padding: 0 .2em;
  border-radius: 3px;
}
.md-preview sub, .md-preview sup { color: var(--tip); }
.md-preview kbd {
  font-family: var(--mono);
  font-size: .85em;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  padding: 1px 6px;
  color: var(--text-bright);
  border-radius: 4px;
}

.md-spoiler {
  background: var(--bg-panel);
  color: transparent;
  padding: 0 4px;
  cursor: pointer;
  transition: color .1s, background .1s;
  border-radius: 4px;
}
.md-spoiler:hover, .md-spoiler:focus {
  background: var(--border);
  color: var(--text);
  outline: none;
}

.md-swatch {
  display: inline-block;
  width: .9em;
  height: .9em;
  margin-right: 4px;
  vertical-align: -0.1em;
  border: 1px solid rgba(232,225,211,.3);
  border-radius: 2px;
}

.md-preview code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  padding: .15em .4em;
  color: var(--accent);
  border-radius: 4px;
}

.md-preview blockquote {
  margin: 1em 0;
  padding: .4em 1em;
  border-left: 3px solid var(--border);
  background: var(--bg-raised);
  color: var(--text-dim);
  border-radius: 0;
}
.md-preview blockquote p { margin: .4em 0; }

/* Square corners on purpose: a rounded corner where a single colored side
   meets it makes the color visibly "bend" around the curve. */
.md-callout {
  margin: 1em 0;
  padding: .7em 1em 1em;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--bg-raised);
  border-radius: 0;
}
.md-callout-title { font-weight: 700; margin: 0 0 .3em; color: var(--text-bright); }
.md-callout p:last-child { margin-bottom: 0; }
.md-callout-note { border-left-color: var(--note); }
.md-callout-tip { border-left-color: var(--tip); }
.md-callout-important { border-left-color: var(--important); }
.md-callout-warning { border-left-color: var(--warn); }
.md-callout-caution { border-left-color: var(--danger); }
.md-callout-success { border-left-color: var(--success); }

.md-preview ul, .md-preview ol { padding-left: 1.4em; margin: .6em 0; }
.md-preview li { margin: .25em 0; }
.md-task-item { list-style: none; margin-left: -1.4em; }
.md-task-item input { margin-right: 6px; }

.md-preview table {
  border-collapse: collapse;
  margin: 1em 0;
  width: 100%;
  font-size: .92em;
}
.md-preview th, .md-preview td {
  border: 1px solid var(--border);
  padding: 6px 12px;
}
.md-preview th { background: var(--bg-panel); color: var(--text-bright); }
.md-preview tr:nth-child(even) td { background: rgba(232,225,211,.02); }

.md-preview hr { border: none; border-top: 1px solid var(--border); margin: 1.6em 0; }

.md-preview img, .md-video { max-width: 100%; }
.md-embed-wrap { display: block; position: relative; padding-top: 56.25%; height: 0; max-width: 640px; }
.md-embed { position: absolute; inset: 0; width: 100%; height: 100%; border: 1px solid var(--border); }
.md-audio { width: 100%; }

.md-toc {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  padding: .8em 1.2em;
  margin: 1em 0;
  border-radius: 6px;
}
.md-toc ul { list-style: none; margin: 0; padding: 0; }
.md-toc li { margin: .3em 0; }
.md-toc-level-2 { margin-left: 1em; }
.md-toc-level-3 { margin-left: 2em; }
.md-toc a { color: var(--accent); }

.md-footnotes { margin-top: 2em; font-size: .9em; color: var(--text-dim); }
.md-footnote-back { margin-left: 6px; }

.md-codeblock {
  margin: 1em 0;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--ink);
  border-radius: 6px;
}
.md-codeblock-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
}
.md-code-lang { font-family: var(--mono); font-size: 11.5px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .05em; }
.md-copy-btn {
  font-size: 11.5px;
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 2px 8px;
  cursor: pointer;
  border-radius: 4px;
}
.md-copy-btn:hover { color: var(--accent); border-color: var(--accent); }
.md-codeblock pre { margin: 0; padding: 14px 16px; overflow: auto; }
.md-codeblock code { font-family: var(--mono); font-size: 13px; line-height: 1.55; color: var(--text); background: none; border: none; padding: 0; }

.tok-keyword { color: var(--danger); }
.tok-string { color: var(--tip); }
.tok-number { color: var(--accent); }
.tok-comment { color: var(--text-dim); font-style: italic; }
.tok-function { color: var(--note); }
.tok-boolean { color: var(--important); }

/* scrollbars */
* { scrollbar-width: thin; scrollbar-color: #4a4030 var(--bg); }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--bg); }
*::-webkit-scrollbar-thumb { background: #4a4030; }
*::-webkit-scrollbar-thumb:hover { background: #5c4f3a; }

@media (max-width: 1100px) {
  .layout { flex-direction: column; overflow: auto; }
  .pane-editor, .pane-preview { flex: 0 0 auto !important; height: 360px; border-right: none; border-bottom: 1px solid var(--border); }
  .pane-guide { flex: 0 0 auto; }
  .resizer { display: none; }
}

@media (max-width: 720px) {
  .app-header { grid-template-columns: 1fr; justify-items: start; row-gap: 10px; }
  .app-header-title, .site-nav, .app-header-actions { justify-self: start; }
}