/* Shared by the chapter catalog and static nbconvert readers only. */
:root {
  color-scheme: light;
  --nb-accent: #176b62;
  --nb-accent-dark: #105149;
  --nb-ink: #202322;
  --nb-muted: #626966;
  --nb-line: #dce2df;
  --nb-soft: #f5f7f6;
  --nb-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --nb-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 80px; }
.nb-page, body.jp-Notebook {
  margin: 0;
  background: #fff;
  color: var(--nb-ink);
  font: 16px/1.7 var(--nb-font);
  letter-spacing: 0;
  overflow-wrap: anywhere;
}
button, input, select { font: inherit; letter-spacing: 0; }
a { color: var(--nb-accent); text-underline-offset: 3px; }
a:hover { color: var(--nb-accent-dark); }
:focus-visible { outline: 2px solid var(--nb-accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.nb-sr-only, .nb-skip:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.nb-skip:focus { position: fixed; top: 8px; left: 12px; z-index: 30; padding: 8px; background: #fff; }
.nb-header { padding: 16px 24px; border-bottom: 1px solid var(--nb-line); }
.nb-header-inner { max-width: 1080px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 12px 24px; flex-wrap: wrap; }
.nb-eyebrow { margin: 0; color: var(--nb-muted); font-size: 13px; }
.nb-header h1 { margin: 2px 0 0; font-size: 22px; line-height: 1.45; }
.nb-hub-link, .nb-back-ch { display: inline-flex; align-items: center; min-height: 44px; font-size: 14px; }
.nb-main { max-width: 1128px; padding: 24px 24px 56px; margin: auto; }
.nb-main > h1 { font-size: 22px; line-height: 1.5; }
.nb-chapter { margin: 0 0 36px; }
.nb-chapter-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px; margin-bottom: 8px; }
.nb-chapter-head h2 { margin: 0; font-size: 18px; line-height: 1.5; }
.nb-chapter-count { margin: 0; color: var(--nb-muted); font-size: 14px; }
.nb-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 12px 28px; padding: 20px 0; border-top: 1px solid var(--nb-line); }
.nb-card h2, .nb-card h3 { margin: 0; font-size: 17px; line-height: 1.5; }
.nb-card-blurb { max-width: 760px; margin: 6px 0 0; font-size: 14px; }
.nb-card-meta, .nb-soon { margin: 6px 0 0; font-size: 13px; color: var(--nb-muted); }
.nb-card-points-label { display: block; margin-bottom: 2px; font-size: 12px; }
.nb-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.nb-btn { display: inline-flex; justify-content: center; align-items: center; min-height: 44px; padding: 0 8px; font-size: 14px; }
.nb-btn--primary { border: 1px solid var(--nb-accent); border-radius: 4px; padding: 0 14px; background: var(--nb-accent); color: #fff; text-decoration: none; }
.nb-btn--primary:hover { background: var(--nb-accent-dark); color: #fff; }
.nb-empty h2 { font-size: 20px; margin: 0 0 12px; }

/* Notebook layout keeps code and rich outputs distinct without enclosing cards. */
#ai-labs-chrome { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 8px 20px; padding: 6px max(20px, calc((100% - 1080px) / 2)); border-bottom: 1px solid var(--nb-line); background: #fff; font-size: 14px; }
#ai-labs-chrome a { display: inline-flex; align-items: center; min-height: 44px; flex-shrink: 0; }
#ai-labs-chrome a:last-child { margin-left: auto; }
body.jp-Notebook > main { max-width: 1128px; margin: auto; padding: 24px 24px 64px; }
.jp-Cell { min-width: 0; margin: 0 0 20px; }
.jp-Collapser, .jp-MarkdownCell .jp-InputPrompt { display: none; }
.jp-InputArea, .jp-OutputArea-child { display: grid; grid-template-columns: 68px minmax(0, 1fr); gap: 12px; min-width: 0; }
.jp-MarkdownCell .jp-InputArea { display: block; margin-left: 80px; }
.jp-InputPrompt, .jp-OutputPrompt { padding-top: 12px; text-align: right; color: var(--nb-muted); font: 12px/1.6 var(--nb-mono); white-space: nowrap; }
.jp-InputArea-editor { min-width: 0; border: 1px solid var(--nb-line); border-radius: 6px; background: var(--nb-soft); }
.jp-InputArea-editor, .jp-OutputArea-output, .nb-table-scroll { max-width: 100%; overflow: auto; scrollbar-color: #9ba8a1 var(--nb-soft); }
.jp-InputArea-editor pre { min-width: max-content; margin: 0; padding: 12px 16px; }
.jp-CodeCell pre { font: 13px/1.65 var(--nb-mono); letter-spacing: 0; white-space: pre; overflow-wrap: normal; tab-size: 4; }
.nb-code-tools { display: flex; justify-content: flex-end; align-items: center; min-height: 44px; margin-left: 80px; }
.nb-icon-button { width: 44px; height: 44px; flex: 0 0 44px; padding: 0; border: 1px solid transparent; border-radius: 4px; background: #fff; color: var(--nb-accent); font-size: 22px; line-height: 1; cursor: pointer; }
.nb-icon-button:hover { background: var(--nb-soft); border-color: var(--nb-line); }
.nb-copy[data-state="copied"] { color: var(--nb-accent-dark); }
.nb-copy-buffer { position: fixed; top: -10000px; left: 0; }
#ai-labs-status:not(:empty) { position: fixed; bottom: 20px; left: 20px; z-index: 25; max-width: calc(100% - 88px); padding: 8px 12px; background: var(--nb-ink); color: #fff; border-radius: 4px; font-size: 14px; }
#ai-labs-top { position: fixed; right: 16px; bottom: 16px; z-index: 9; border-color: var(--nb-line); }
.jp-Cell-outputWrapper { margin-top: 12px; }
.jp-OutputArea-child + .jp-OutputArea-child { margin-top: 12px; }
.jp-OutputArea-output { min-width: 0; }
.jp-RenderedText pre { margin: 0; padding: 12px 0; }
.jp-RenderedHTMLCommon { min-width: 0; }
.jp-RenderedHTMLCommon h1, .jp-RenderedHTMLCommon h2, .jp-RenderedHTMLCommon h3, .jp-RenderedHTMLCommon h4 { color: var(--nb-ink); line-height: 1.5; letter-spacing: 0; }
.jp-RenderedHTMLCommon h1 { margin: 0 0 16px; font-size: 26px; }
.jp-RenderedHTMLCommon h2 { margin: 28px 0 12px; font-size: 21px; }
.jp-RenderedHTMLCommon h3 { margin: 22px 0 10px; font-size: 18px; }
.jp-RenderedHTMLCommon h4 { font-size: 16px; }
.jp-RenderedHTMLCommon p { margin: 12px 0; }
.jp-RenderedHTMLCommon ul, .jp-RenderedHTMLCommon ol { padding-left: 24px; }
.jp-RenderedHTMLCommon li + li { margin-top: 4px; }
.jp-RenderedHTMLCommon blockquote { margin: 16px 0; padding: 0 16px; border-left: 3px solid var(--nb-line); }
.jp-RenderedHTMLCommon code { padding: 2px 4px; border-radius: 3px; background: var(--nb-soft); font-family: var(--nb-mono); font-size: 0.9em; }
.jp-RenderedHTMLCommon pre { max-width: 100%; padding: 12px; overflow: auto; background: var(--nb-soft); font: 13px/1.65 var(--nb-mono); white-space: pre; overflow-wrap: normal; }
.jp-RenderedHTMLCommon pre code { padding: 0; font-size: inherit; }
.jp-RenderedHTMLCommon details { margin: 16px 0; padding: 12px 0; border-top: 1px solid var(--nb-line); border-bottom: 1px solid var(--nb-line); }
.jp-RenderedHTMLCommon summary { min-height: 32px; cursor: pointer; color: var(--nb-accent); }
.jp-RenderedHTMLCommon .anchor-link { margin-left: 8px; color: var(--nb-accent); text-decoration: none; font-size: 0.75em; opacity: 0; }
.jp-RenderedHTMLCommon :is(h1, h2, h3, h4):hover .anchor-link, .jp-RenderedHTMLCommon .anchor-link:focus-visible { opacity: 1; }
.jp-RenderedHTMLCommon table { width: max-content; max-width: none; border-collapse: collapse; margin: 8px 0 16px; font-size: 14px; line-height: 1.6; }
.jp-RenderedHTMLCommon th, .jp-RenderedHTMLCommon td { padding: 8px 12px; border-bottom: 1px solid var(--nb-line); text-align: left; white-space: nowrap; }
.jp-RenderedHTMLCommon thead th { background: var(--nb-soft); font-weight: 600; }
.jp-RenderedHTMLCommon tbody tr:nth-child(even) { background: #fafbfa; }
.jp-RenderedHTMLCommon img, .jp-RenderedImage img, .jp-RenderedSVG img, .jp-RenderedSVG svg { display: block; max-width: 100%; height: auto; }
.nb-figure { margin: 0; }
.nb-figure-tools { display: flex; justify-content: flex-end; min-height: 44px; }
.nb-figure img[data-zoomable] { cursor: zoom-in; }
.nb-image-dialog { width: calc(100% - 32px); max-width: 1440px; max-height: calc(100dvh - 32px); padding: 12px; border: 1px solid var(--nb-line); border-radius: 6px; color: var(--nb-ink); background: #fff; }
.nb-image-dialog::backdrop { background: rgb(0 0 0 / 65%); }
.nb-image-dialog header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.nb-image-dialog h2 { margin: 0; font-size: 16px; line-height: 1.5; }
.nb-image-detail { max-height: 72dvh; overflow: auto; overscroll-behavior: contain; }
.nb-image-detail img { display: block; max-width: none; height: auto; margin: auto; }
body.nb-dialog-open { overflow: hidden; }

/* Local syntax colors; no JupyterLab UI bundle or webfonts are needed. */
.highlight { color: var(--nb-ink); }
.highlight :is(.k, .kc, .kd, .kn, .kp, .kr, .kt, .ow) { color: var(--nb-accent-dark); font-weight: 600; }
.highlight :is(.s, .s1, .s2, .sa, .sb, .sc, .sd, .se, .sh, .si, .sr, .ss) { color: #296349; }
.highlight :is(.c, .c1, .cm, .cp, .cs) { color: var(--nb-muted); font-style: italic; }
.highlight :is(.nf, .nc, .nb, .nd) { color: var(--nb-accent); }
.highlight :is(.err, .gr, .gt) { color: #a32828; }
.ansi-red-fg { color: #a32828; }
.ansi-green-fg { color: #296349; }
.ansi-bold { font-weight: 700; }

@media (max-width: 700px) {
  .nb-header { padding: 12px 16px; }
  .nb-header h1 { font-size: 20px; }
  .nb-main { padding: 16px 16px 40px; }
  .nb-card { grid-template-columns: minmax(0, 1fr); gap: 10px; padding: 16px 0; }
  #ai-labs-chrome { gap: 8px 12px; padding: 4px 12px; font-size: 13px; }
  #ai-labs-chrome a { min-width: 0; flex-shrink: 1; }
  body.jp-Notebook > main { padding: 20px 12px 56px; }
  .jp-InputArea, .jp-OutputArea-child { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .jp-InputPrompt, .jp-OutputPrompt { display: none; }
  .jp-MarkdownCell .jp-InputArea, .nb-code-tools { margin-left: 0; }
  .jp-RenderedHTMLCommon h1 { font-size: 22px; }
  .jp-RenderedHTMLCommon h2 { font-size: 19px; }
  .jp-InputArea-editor pre { padding: 12px; }
  .nb-image-dialog { width: calc(100% - 16px); padding: 8px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  #ai-labs-chrome, #ai-labs-top, #ai-labs-status, .nb-code-tools, .nb-figure-tools, .nb-skip, .nb-image-dialog { display: none !important; }
  body.jp-Notebook > main { max-width: none; padding: 0; }
  .jp-InputArea-editor, .jp-OutputArea-output, .nb-table-scroll { overflow: visible; }
  .jp-InputArea-editor pre, .jp-RenderedText pre { min-width: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
  .jp-RenderedHTMLCommon table { width: 100%; }
  .jp-RenderedHTMLCommon th, .jp-RenderedHTMLCommon td { white-space: normal; }
  .jp-RenderedHTMLCommon .anchor-link { display: none; }
}