custom.css

/* No-op: Removed highlight tag styling as it does not work */

/*
/* Development warning banner */

/* In your custom.css - Force TOC sections to stay expanded */
.bd-sidebar-primary .toctree-l1.current > ul,
.bd-sidebar-primary .toctree-l1.has-children > ul {
    display: block !important;
    height: auto !important;
    opacity: 1 !important;
}

/* Disable the collapse animation entirely */
.bd-sidebar-primary .toctree-l1 > ul {
    transition: none !important;
}

/* Keep expand arrows in expanded state */
.bd-sidebar-primary .toctree-expand {
    transform: rotate(90deg) !important;
}

/* body::before {
    content: "These notes are under active development and may contain errors.";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    margin: 0;
    background-color: #f39c12; /* orange */
    color: #ffffff;
    text-align: center;
    padding: 8px 12px;
    font-weight: bold;
    z-index: 9999;
    font-size: 16px;
/* } */ 

/* Offset page for fixed banner */
/* body { 
    padding-top: 48px; 
} */

/* If theme uses a sticky header, push it below the banner */
/* .bd-header, header, .navbar {
    top: 48px !important;
} */

/* Prefer CSS variables when supported by theme */
:root {
  --bd-sidebar-width: 240px;
  --bd-sidebar-secondary-width: 240px;
  --bd-page-width: 1400px;
  --content-max-width: 1120px;
}

:is(html.dark, html[data-theme="dark"]) {
  --notes-dark-accent: #f3c969;
  --notes-dark-accent-strong: #ffd978;
  --notes-dark-accent-soft: rgba(243, 201, 105, 0.16);
  --notes-dark-accent-border: rgba(243, 201, 105, 0.34);
  --notes-dark-activity: #d8bf7a;
  --notes-dark-activity-soft: rgba(216, 191, 122, 0.16);
  --notes-dark-activity-strong: #f0dca0;
  --notes-dark-nav-link: #f1ece3;
  --notes-dark-nav-link-muted: #d2c7b8;
  --notes-dark-nav-link-strong: #fff4d7;
  --notes-dark-surface: #221d18;
}

/* Keep search beside the toolbar links, with a small gap between controls. */
@media (min-width: 640px) {
  .myst-top-nav-bar > div > div:has(> a) {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-inline-start: 1rem;
  }

  .myst-top-nav-bar > div > div > a {
    margin-inline: 0;
    white-space: nowrap;
  }
}

@media (min-width: 1280px) {
  .myst-top-nav-bar .myst-search-bar {
    flex-shrink: 0;
  }

  .myst-top-nav-bar > div > div:has(> a) {
    flex-wrap: nowrap;
    flex-shrink: 0;
  }
}

/* Edward Tufte's font styles */
body {
    font-family: 'Avenir', 'Helvetica Neue', Helvetica, Arial, system-ui, serif;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Avenir', 'Helvetica Neue', Helvetica, Arial, system-ui, serif;
}

/* Hyperlink styles - override theme defaults for all links in main content, including headings and lists, but not in nav/sidebar */
main a:not(nav a):not(.sidebar a),
article a:not(nav a):not(.sidebar a),
.bd-article a:not(nav a):not(.sidebar a),
.bd-content a:not(nav a):not(.sidebar a),
div.bd-article a:not(nav a):not(.sidebar a),
div.bd-content a:not(nav a):not(.sidebar a) {
    color: #1d3faf !important;
    text-decoration: none !important;
    border-bottom: none !important;
    background: none !important;
    transition: background 0.15s;
}

main a:hover:not(nav a):not(.sidebar a),
article a:hover:not(nav a):not(.sidebar a),
.bd-article a:hover:not(nav a):not(.sidebar a),
.bd-content a:hover:not(nav a):not(.sidebar a),
div.bd-article a:hover:not(nav a):not(.sidebar a),
div.bd-content a:hover:not(nav a):not(.sidebar a) {
    color: #1d3faf !important;
    /* text-decoration: underline !important; */
    border-bottom: none !important;
    background: #ffcb05 !important;
    border-radius: 0.2em;
}

/* Dark mode: content links only (pydata-sphinx-theme / Jupyter Book) */
:is(html.dark, html[data-theme="dark"]) .bd-main .bd-content a:not(.headerlink):not(.toclink),
:is(html.dark, html[data-theme="dark"]) .bd-main .bd-content article a:not(.headerlink):not(.toclink),
:is(html.dark, html[data-theme="dark"]) main.article article.content a[href]:not(nav a),
:is(html.dark, html[data-theme="dark"]) article.content a[href]:not(nav a),
:is(html.dark, html[data-theme="dark"]) .article.content a[href]:not(nav a) {
  color: var(--notes-dark-accent) !important;
}

/* Hover/focus */
:is(html.dark, html[data-theme="dark"]) .bd-main .bd-content a:not(.headerlink):not(.toclink):hover,
:is(html.dark, html[data-theme="dark"]) .bd-main .bd-content a:not(.headerlink):not(.toclink):focus,
:is(html.dark, html[data-theme="dark"]) main.article article.content a[href]:not(nav a):hover,
:is(html.dark, html[data-theme="dark"]) main.article article.content a[href]:not(nav a):focus,
:is(html.dark, html[data-theme="dark"]) article.content a[href]:not(nav a):hover,
:is(html.dark, html[data-theme="dark"]) article.content a[href]:not(nav a):focus,
:is(html.dark, html[data-theme="dark"]) .article.content a[href]:not(nav a):hover,
:is(html.dark, html[data-theme="dark"]) .article.content a[href]:not(nav a):focus {
  color: #000 !important;
  background: var(--notes-dark-accent-strong) !important;
  text-decoration: none;
}

/* Dark mode UI accents */
:is(html.dark, html[data-theme="dark"]) .bd-header,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar-primary,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar-secondary,
:is(html.dark, html[data-theme="dark"]) .bd-toc {
  --color-link: var(--notes-dark-accent);
  --color-link-hover: var(--notes-dark-accent-strong);
}

:is(html.dark, html[data-theme="dark"]) .bd-header a,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar a,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar summary,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar .caption,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar .sidebar-heading,
:is(html.dark, html[data-theme="dark"]) .bd-toc a,
:is(html.dark, html[data-theme="dark"]) .bd-toc summary,
:is(html.dark, html[data-theme="dark"]) .bd-toc .toc-title,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item a {
  color: var(--notes-dark-nav-link) !important;
}

:is(html.dark, html[data-theme="dark"]) .bd-sidebar summary,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar .caption,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar .sidebar-heading,
:is(html.dark, html[data-theme="dark"]) .bd-toc summary,
:is(html.dark, html[data-theme="dark"]) .bd-toc .toc-title {
  color: var(--notes-dark-nav-link-muted) !important;
}

:is(html.dark, html[data-theme="dark"]) .bd-header .navbar-nav > li > a:hover,
:is(html.dark, html[data-theme="dark"]) .bd-header .navbar-nav > li > a:focus,
:is(html.dark, html[data-theme="dark"]) .bd-header .navbar-nav > li.current > a,
:is(html.dark, html[data-theme="dark"]) .bd-header a:hover,
:is(html.dark, html[data-theme="dark"]) .bd-header a:focus,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar summary:hover,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar summary:focus,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar a:hover,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar a:focus,
:is(html.dark, html[data-theme="dark"]) .bd-toc summary:hover,
:is(html.dark, html[data-theme="dark"]) .bd-toc summary:focus,
:is(html.dark, html[data-theme="dark"]) .bd-toc a:hover,
:is(html.dark, html[data-theme="dark"]) .bd-toc a:focus {
  color: var(--notes-dark-nav-link-strong) !important;
}

:is(html.dark, html[data-theme="dark"]) .search-button,
:is(html.dark, html[data-theme="dark"]) .search-button__button,
:is(html.dark, html[data-theme="dark"]) .bd-search .form-control,
:is(html.dark, html[data-theme="dark"]) .bd-search input {
  border-color: var(--notes-dark-accent-border) !important;
}

:is(html.dark, html[data-theme="dark"]) .search-button:focus-within,
:is(html.dark, html[data-theme="dark"]) .search-button__button:hover,
:is(html.dark, html[data-theme="dark"]) .search-button__button:focus,
:is(html.dark, html[data-theme="dark"]) .bd-search .form-control:focus,
:is(html.dark, html[data-theme="dark"]) .bd-search input:focus {
  box-shadow: 0 0 0 0.18rem var(--notes-dark-accent-soft) !important;
  border-color: var(--notes-dark-accent) !important;
}

:is(html.dark, html[data-theme="dark"]) .bd-sidebar .active,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar a.active,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar .current > a,
:is(html.dark, html[data-theme="dark"]) .bd-sidebar .current-page,
:is(html.dark, html[data-theme="dark"]) .bd-toc .active,
:is(html.dark, html[data-theme="dark"]) .bd-toc a.active,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item.myst-outline-item-active {
  color: var(--notes-dark-accent-strong) !important;
  background-color: var(--notes-dark-accent-soft) !important;
  border-left-color: var(--notes-dark-accent) !important;
}

:is(html.dark, html[data-theme="dark"]) .bd-toc .toc-entry > .nav-link.active,
:is(html.dark, html[data-theme="dark"]) .bd-toc nav a.active,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item-active > a {
  color: var(--notes-dark-accent-strong) !important;
  border-left-color: var(--notes-dark-accent) !important;
  background-color: var(--notes-dark-accent-soft) !important;
}

/* MyST dark-mode navigation chrome */
:is(html.dark, html[data-theme="dark"]) .myst-top-nav a,
:is(html.dark, html[data-theme="dark"]) .myst-home-link,
:is(html.dark, html[data-theme="dark"]) .myst-theme-button,
:is(html.dark, html[data-theme="dark"]) .myst-search-bar,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc a,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc .cursor-pointer,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc button,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc svg,
:is(html.dark, html[data-theme="dark"]) .myst-fm-block-header a,
:is(html.dark, html[data-theme="dark"]) .myst-fm-block-header button {
  color: var(--notes-dark-nav-link) !important;
}

:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc [data-state="open"] > .myst-toc-item .cursor-pointer,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc .text-blue-800,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc .dark\:text-blue-200 {
  color: var(--notes-dark-accent-strong) !important;
}

:is(html.dark, html[data-theme="dark"]) .myst-top-nav a:hover,
:is(html.dark, html[data-theme="dark"]) .myst-home-link:hover,
:is(html.dark, html[data-theme="dark"]) .myst-theme-button:hover,
:is(html.dark, html[data-theme="dark"]) .myst-search-bar:hover,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc a:hover,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc .cursor-pointer:hover,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc button:hover,
:is(html.dark, html[data-theme="dark"]) .myst-fm-block-header a:hover,
:is(html.dark, html[data-theme="dark"]) .myst-fm-block-header button:hover {
  color: var(--notes-dark-nav-link-strong) !important;
}

:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc a.active,
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc a[aria-current="page"],
:is(html.dark, html[data-theme="dark"]) .myst-primary-sidebar .myst-toc .active {
  color: var(--notes-dark-accent-strong) !important;
  background-color: var(--notes-dark-accent-soft) !important;
}

/* Remove navigation buttons */
footer {
    display: none !important;
}

/* Remove navigation buttons from content pages */
.content-container {
    padding-bottom: 0 !important;
}

/* Remove navigation buttons from sidebar */
.sidebar {
    padding-bottom: 0 !important;
    width: 240px !important;
    max-width: 240px !important;
}

.myst-footer {
    display: none;
}

/* Additional sidebar width controls */
.bd-sidebar,
.bd-sidebar-primary,
.bd-sidebar-secondary,
.sidebar-drawer {
    width: 240px !important;
    max-width: 240px !important;
}

/* Right-hand on-this-page TOC */
.bd-toc {
    width: 240px !important;
    max-width: 240px !important;
}

.bd-toc details[data-activities-toc] {
  margin-top: 0.75rem;
}

/* Ghost heading for activity TOC entries - visually hidden but maintains anchor for TOC navigation */
.activity-toc-heading,
h1.activity-toc-heading,
h2.activity-toc-heading,
h3.activity-toc-heading,
h4.activity-toc-heading,
h5.activity-toc-heading,
h6.activity-toc-heading,
span.activity-toc-heading,
[id^="activity-"]:is(h1, h2, h3, h4, h5, h6, span):not(.admonition):not(.admonition-title) {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Bold all TOC links and normalize color (prevent graying of deeper headings) */
.bd-toc li a,
li.myst-outline-item a {
  font-weight: 450 !important;
  color: #1e293b !important;
  opacity: 1 !important;
}

/* Dark mode TOC links */
:is(html.dark, html[data-theme="dark"]) .bd-toc li a,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item a,
:is(html.dark, html[data-theme="dark"]) .bd-toc summary {
  color: var(--notes-dark-nav-link) !important;
}

/* Activity TOC link styling - override Tailwind utility classes */
.bd-toc li a[href^="#activity-"],
.bd-toc [data-activities-toc] a,
#activities-toc a,
li.myst-outline-item a[href^="#activity-"] {
  color: #4a8f6b !important; /* A slightly grayer, muted green */
  font-weight: 500 !important;
  position: relative;
}

:is(html.dark, html[data-theme="dark"]) .bd-toc li a[href^="#activity-"],
:is(html.dark, html[data-theme="dark"]) .bd-toc [data-activities-toc] a,
:is(html.dark, html[data-theme="dark"]) #activities-toc a,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item a[href^="#activity-"] {
  color: var(--notes-dark-activity) !important;
}

/* Add ✍️ after activity TOC links */
li.myst-outline-item a[href^="#activity-"]::after {
  content: ' ✍️';
  font-size: 0.5em;
  margin-left: 0.25em;
  vertical-align: middle;
}

.bd-toc li a[href^="#activity-"]:hover,
.bd-toc li a[href^="#activity-"]:focus,
li.myst-outline-item a[href^="#activity-"]:hover,
li.myst-outline-item a[href^="#activity-"]:focus {
  background-color: #d4edda !important;
  color: #155724 !important;
  border-radius: 0.2em;
  text-decoration: none !important;
}

:is(html.dark, html[data-theme="dark"]) .bd-toc li a[href^="#activity-"]:hover,
:is(html.dark, html[data-theme="dark"]) .bd-toc li a[href^="#activity-"]:focus,
:is(html.dark, html[data-theme="dark"]) .bd-toc [data-activities-toc] a:hover,
:is(html.dark, html[data-theme="dark"]) .bd-toc [data-activities-toc] a:focus,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item a[href^="#activity-"]:hover,
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item a[href^="#activity-"]:focus {
  background-color: var(--notes-dark-activity-soft) !important;
  color: var(--notes-dark-activity-strong) !important;
}

/* Override Tailwind classes on the parent li for activity items */
li.myst-outline-item:has(a[href^="#activity-"]) {
  background-color: transparent !important;
  border-left-color: transparent !important;
}

li.myst-outline-item:has(a[href^="#activity-"]):hover {
  background-color: #d4edda !important;
  border-left-color: #155724 !important;
}

li.myst-outline-item.myst-outline-item-active:has(a[href^="#activity-"]),
li.myst-outline-item:has(a[href^="#activity-"]).myst-outline-item-active {
  background-color: #c3e6cb !important;
  border-left-color: #155724 !important;
}

:is(html.dark, html[data-theme="dark"]) li.myst-outline-item:has(a[href^="#activity-"]) {
  border-left-color: transparent !important;
}

:is(html.dark, html[data-theme="dark"]) li.myst-outline-item:has(a[href^="#activity-"]):hover {
  background-color: var(--notes-dark-activity-soft) !important;
  border-left-color: var(--notes-dark-activity) !important;
}

:is(html.dark, html[data-theme="dark"]) li.myst-outline-item.myst-outline-item-active:has(a[href^="#activity-"]),
:is(html.dark, html[data-theme="dark"]) li.myst-outline-item:has(a[href^="#activity-"]).myst-outline-item-active {
  background-color: rgba(216, 191, 122, 0.22) !important;
  border-left-color: var(--notes-dark-activity) !important;
}

/* Widen reading column on large screens */
@media (min-width: 992px) {
  .bd-page-width {
    max-width: 1400px !important;
  }

  .bd-content .bd-article-container {
    max-width: 1120px !important;
  }
}

/* UM Gold text selection highlighting */
::selection {
    background-color: #ffcb05;
    color: #000;
}

::-moz-selection {
    background-color: #ffcb05;
    color: #000;
}

/* Keep the logo reasonable on smaller screens */
@media (max-width: 768px) {
  header.bd-header .navbar-brand img,
  header.bd-header .navbar-brand svg,
  .navbar .navbar-brand img,
  .navbar .navbar-brand svg,
  .bd-header .navbar-brand img,
  .bd-header .navbar-brand svg {
    height: 32px !important;
    max-height: 32px !important;
  }
}

/* Fix sidebar navigation expansion for Chapter 1 */
/* When on Chapter 1 pages, keep Chapter 1 section expanded */
body[data-page*="01_introduction_to_supervised_learning"] .bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"]) {
  display: block !important;
}

body[data-page*="01_introduction_to_supervised_learning"] .bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"]) summary::after {
  transform: rotate(90deg) !important;
}

/* Alternative approach: Force Chapter 1 to stay expanded when viewing Chapter 1 content */
.bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"]) {
  display: block !important;
}

.bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"]) summary::after {
  transform: rotate(90deg) !important;
}

/* Ensure the details element is open by default for Chapter 1 */
.bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"]) {
  open: true !important;
}

/* Additional protection against JavaScript interference */
.bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"])[open] {
  display: block !important;
}

.bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"])[open] summary::after {
  transform: rotate(90deg) !important;
}

/* Force the content to be visible even if details is closed */
.bd-sidebar .bd-toc details:has(summary a[href*="01_introduction_to_supervised_learning/00-index"]) > * {
  display: block !important;
}

/* General fix for all chapter index pages - prevent TOC collapse when clicking chapter index */
.bd-sidebar .bd-toc details:has(summary a[href*="00-index"]) {
  open: true !important;
  display: block !important;
}

.bd-sidebar .bd-toc details:has(summary a[href*="00-index"]) summary::after {
  transform: rotate(90deg) !important;
}

/* Ensure chapter content is always visible when on chapter index pages */
.bd-sidebar .bd-toc details:has(summary a[href*="00-index"]) > * {
  display: block !important;
}

/* Processing banner - orange banner at top of page */
.processing-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: #ff9500; /* orange */
  color: #ffffff;
  text-align: center;
  padding: 12px 16px;
  font-weight: 500;
  font-size: 15px;
  z-index: 9999;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Offset page content when banner is active */
body.processing-banner-active {
  padding-top: 48px;
}

/* Adjust header position when banner is active */
body.processing-banner-active .bd-header,
body.processing-banner-active header,
body.processing-banner-active .navbar {
  top: 48px !important;
}

/* Light mode reminder banner */
.lightmode-banner {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: 20px;
  background-color: #ff9500;
  color: #ffffff;
  text-align: center;
  padding: 0 16px;
  font-weight: 500;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  box-sizing: border-box;
}

.lightmode-banner__close {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  height: 16px;
  width: 16px;
  border: 0;
  background: transparent;
  color: #ffffff;
  font-size: 16px;
  line-height: 16px;
  cursor: pointer;
  padding: 0;
}

body.lightmode-banner-active .bd-header,
body.lightmode-banner-active header,
body.lightmode-banner-active .navbar {
  top: 20px !important;
}

body.lightmode-banner-active .processing-banner {
  top: 20px;
}

body.lightmode-banner-active.processing-banner-active {
  padding-top: 68px;
}

body.lightmode-banner-active.processing-banner-active .bd-header,
body.lightmode-banner-active.processing-banner-active header,
body.lightmode-banner-active.processing-banner-active .navbar {
  top: 68px !important;
}

/* Optional reading font; math and code retain their dedicated fonts. */
html.font-palatino body,
html.font-palatino :is(h1, h2, h3, h4, h5, h6) {
  font-family: Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
}

/* The native theme button remains available until its replacement is mounted. */
html[data-notes-settings="ready"] .myst-theme-button { display: none; }

/* Paper: soft neutral cream, with matching page and navigation surfaces. */
html[data-notes-appearance="paper"] {
  --paper-page: #f0eee6;
  --paper-sidebar: #f0eee6;
  --paper-border: #d8d4c9;
  --paper-ink: #3d3929;
  --paper-accent: #a35139;
  background: var(--paper-page);
  color-scheme: light;
}
html[data-notes-appearance="paper"] body,
html[data-notes-appearance="paper"] .myst-top-nav {
  background-color: var(--paper-page);
  color: var(--paper-ink);
}
html[data-notes-appearance="paper"] .myst-primary-sidebar-pointer {
  background-color: var(--paper-sidebar);
  color: var(--paper-ink);
}
html[data-notes-appearance="paper"] article.content,
html[data-notes-appearance="paper"] article.content :is(h1, h2, h3, h4, h5, h6) {
  color: var(--paper-ink);
}
html[data-notes-appearance="paper"] .myst-top-nav {
  box-shadow: 0 1px 0 var(--paper-border);
}
html[data-notes-appearance="paper"] .myst-primary-sidebar a[aria-current="page"] {
  background: #e2ded3;
  color: var(--paper-ink);
}

/* Include navigation, page contents, and translucent white theme panels. */
html[data-notes-appearance="paper"] :is(.myst-outline, .myst-top-nav, .myst-top-nav-bar, .myst-search-dialog, .myst-search, .myst-dropdown) {
  background-color: var(--paper-page);
  color: var(--paper-ink);
}
html[data-notes-appearance="paper"] :is(.myst-primary-sidebar-nav, .myst-primary-sidebar-footer, .myst-toc, .myst-toc-nav) {
  background-color: var(--paper-sidebar);
  color: var(--paper-ink);
}
html[data-notes-appearance="paper"] :is(.myst-outline, .myst-top-nav, .myst-primary-sidebar-pointer) :is([class~="bg-white"], [class~="bg-white/80"], [class~="bg-white/95"], [class~="bg-gray-50"]) {
  background-color: var(--paper-page);
}
html[data-notes-appearance="paper"] .myst-outline :is(a, button),
html[data-notes-appearance="paper"] .myst-primary-sidebar :is(a, button) {
  color: var(--paper-ink);
}
html[data-notes-appearance="paper"] .myst-outline-item {
  border-color: var(--paper-border);
}

/* White plot backgrounds take on the surrounding paper color automatically,
   including raster outputs, SVG diagrams, and interactive WebGL canvases.
   Multiplication also keeps antialiased edges smooth and gridlines visible. */
html[data-notes-appearance="paper"] article :is(
  .js-plotly-plot, [data-name="safe-output-image"], [data-name="safe-output-svg"],
  .course-caption .jp-RenderedSVG, .notes-diagram img
) {
  mix-blend-mode: multiply;
}

/* Preserve photographs, image-valued data, and explicit original-color outputs. */
html[data-notes-appearance="paper"][data-notes-image-data] article [data-name="safe-output-image"],
html[data-notes-appearance="paper"] article .js-plotly-plot:has(.heatmaplayer image, .imagelayer image),
html[data-notes-appearance="paper"] article .notes-original-colors {
  mix-blend-mode: normal;
}

/* Shared dark reading palette. Diagram pixels and authored text use the same
   50% white / 50% source-color mapping, without modifying notebook content.
   The SVG filter lives in font-preference.js and also covers WebGL canvases. */
:is(html.dark, html[data-theme="dark"]) {
  --notes-ink-blue: #9ec0fa;
  --notes-ink-green: #80a6a0;
  --notes-ink-pink: #ec8db0;
  --notes-ink-purple: #c080c0;
  --notes-ink-orange: #ffd280;
  --notes-ink-dark-orange: #ffc680;
  --notes-ink-gold: #ffeb80;
  --notes-ink-light-blue: #d6ecf2;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#3d81f6" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #3d81f6" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(61, 129, 246)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(61, 129, 246)" i] {
  color: var(--notes-ink-blue) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#004d40" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #004d40" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(0, 77, 64)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(0, 77, 64)" i] {
  color: var(--notes-ink-green) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#d81b60" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #d81b60" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#d81a60" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #d81a60" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(216, 27, 96)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(216, 27, 96)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(216, 26, 96)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(216, 26, 96)" i] {
  color: var(--notes-ink-pink) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:purple" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: purple" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#800080" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #800080" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(128, 0, 128)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(128, 0, 128)" i] {
  color: var(--notes-ink-purple) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:orange" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: orange" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#ffa500" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #ffa500" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(255, 165, 0)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(255, 165, 0)" i] {
  color: var(--notes-ink-orange) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#ff8c00" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #ff8c00" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(255, 140, 0)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(255, 140, 0)" i] {
  color: var(--notes-ink-dark-orange) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:gold" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: gold" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#ffd700" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #ffd700" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(255, 215, 0)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(255, 215, 0)" i] {
  color: var(--notes-ink-gold) !important;
}

:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:lightblue" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: lightblue" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:#add8e6" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: #add8e6" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color:rgb(173, 216, 230)" i],
:is(html.dark, html[data-theme="dark"]) article :is(span, mstyle):not(.js-plotly-plot *, [data-name="safe-output-svg"] *)[style*="color: rgb(173, 216, 230)" i] {
  color: var(--notes-ink-light-blue) !important;
}

/* Filter once at the outside of a visual, never each SVG glyph/trace. This
   keeps raster plots, 3D shading, labels, and slider redraws in agreement. */
:is(html.dark, html[data-theme="dark"]) article :is(
  .js-plotly-plot, [data-name="safe-output-image"], [data-name="safe-output-svg"],
  .course-caption .jp-RenderedSVG, .notes-diagram img
) {
  filter: url(#notes-dark-diagram-colors);
}

/* Screen a zeroed background onto the page so authored PNG diagrams also
   match warm dark-paper tones exactly. */
:is(html.dark, html[data-theme="dark"]) article .notes-diagram img[src] {
  filter: url(#notes-dark-diagram-colors) contrast(1.25);
  mix-blend-mode: screen;
}

/* Photographs and image-valued data must retain their actual pixel values. */
:is(html.dark, html[data-theme="dark"])[data-notes-image-data] article [data-name="safe-output-image"],
:is(html.dark, html[data-theme="dark"]) article .js-plotly-plot:has(.heatmaplayer image, .imagelayer image),
:is(html.dark, html[data-theme="dark"]) article .notes-original-colors {
  filter: none;
}

/* Keep solution headers green in dark mode, matching their green border. */
:is(html.dark, html[data-theme="dark"]) .notes-solution > .myst-admonition-header {
  background-color: rgb(22 163 74 / 16%);
}

/* Match the explanatory figure captions used in Math 124. */
figure.course-caption figcaption {
  font-size: 0.9em;
  font-style: italic;
  color: #626262;
  text-align: center;
  margin-top: 0.4rem;
}
:is(html.dark, html[data-theme="dark"]) figure.course-caption figcaption {
  color: #b8b8b8;
}

/* The taxonomy SVG uses its own dark palette; keep embedded pictures intact.
   Explicit color-scheme also makes manual appearance override the OS theme. */
figure.ml-taxonomy img { color-scheme: light; }
:is(html.dark, html[data-theme="dark"]) figure.ml-taxonomy img { color-scheme: dark; }
@media print {
  :is(html.dark, html[data-theme="dark"]) figure.ml-taxonomy img { color-scheme: light; }
}

/* Reading preferences share the Search area, separate from course-resource links. */
:root {
  --notes-settings-bg: #fff;
  --notes-settings-ink: #292524;
  --notes-settings-muted: #62605b;
  --notes-settings-border: #d6d3d1;
  --notes-settings-hover: #f5f5f4;
  --notes-settings-accent: #1d3faf;
  --notes-settings-selected: #eef2ff;
}
html[data-notes-appearance="paper"] {
  --notes-settings-bg: #f0eee6;
  --notes-settings-ink: #3d3929;
  --notes-settings-muted: #68614f;
  --notes-settings-border: #d8d4c9;
  --notes-settings-hover: #e5e2d8;
  --notes-settings-accent: #a35139;
  --notes-settings-selected: #e9e1d4;
}
html.dark {
  --notes-settings-bg: #221d18;
  --notes-settings-ink: #f1ece3;
  --notes-settings-muted: #d2c7b8;
  --notes-settings-border: #554a3d;
  --notes-settings-hover: #302922;
  --notes-settings-accent: #f3c969;
  --notes-settings-selected: #3a3324;
}
.notes-settings-button {
  display: inline-flex;
  flex: 0 0 44px;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-inline-start: 8px;
  border: 1px solid var(--notes-settings-border);
  border-radius: 8px;
  color: var(--notes-settings-muted);
  background: var(--notes-settings-bg);
  cursor: pointer;
  touch-action: manipulation;
}
.notes-settings-button:hover,
.notes-settings-button[aria-expanded="true"] {
  color: var(--notes-settings-accent);
  background: var(--notes-settings-hover);
}
.notes-settings-button:focus-visible,
.notes-reading-settings button:focus-visible {
  outline: 2px solid var(--notes-settings-accent);
  outline-offset: 3px;
}
html[data-notes-settings="ready"] .myst-top-nav-bar > div:first-child {
  min-width: 0;
  flex-shrink: 1;
  margin-inline-end: 16px;
}
html[data-notes-settings="ready"] .myst-home-link { min-width: 0; }
html[data-notes-settings="ready"] .notes-course-title-full {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-inline-end: 0;
}
.notes-course-title-short { display: none; white-space: nowrap; }
.notes-toolbar-tools { flex-shrink: 0; }
html[data-notes-settings="ready"] .myst-search-bar { min-width: 44px; height: 44px; }
html[data-notes-settings="ready"] .notes-toolbar-links {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 8px;
  margin-inline-start: 12px;
}
.notes-toolbar-more { display: none; }
/* The old footer only holds bootstrap widgets; do not reserve blank sidebar space. */
html[data-notes-settings="ready"] .myst-primary-sidebar-footer { display: none; }
@media (max-width: 1279px) {
  html[data-notes-settings="ready"] .myst-search-bar { width: 44px; }
  html[data-notes-settings="ready"] .myst-search-text-placeholder,
  html[data-notes-settings="ready"] .myst-search-shortcut { display: none; }
}
@media (max-width: 1279px) {
  html[data-notes-settings="ready"] .notes-course-title-full { display: none; }
  .notes-course-title-short { display: inline; }
}
@media (max-width: 767px) {
  html[data-notes-settings="ready"] .notes-toolbar-links { display: none; }
  html[data-notes-settings="ready"] .myst-top-nav-bar > div:first-child { margin-inline-end: 8px; }
  html[data-notes-settings="ready"] .myst-home-link { margin-inline-start: 4px; }
  .notes-toolbar-more { display: block; margin-inline-start: 4px; }
  .notes-toolbar-more .myst-action-menu-button,
  html[data-notes-settings="ready"] .myst-top-nav-menu-button { min-width: 44px; min-height: 44px; justify-content: center; align-items: center; }
}
.notes-reading-settings, .notes-reading-settings * { box-sizing: border-box; }
.notes-reading-settings {
  position: fixed;
  inset: auto;
  z-index: 60;
  width: min(320px, calc(100vw - 24px));
  margin: 0;
  padding: 8px 18px 18px;
  overflow-y: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--notes-settings-border);
  border-radius: 12px;
  background: var(--notes-settings-bg);
  color: var(--notes-settings-ink);
  box-shadow: 0 8px 30px #00000029;
  font-family: 'Avenir', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.4;
}
.notes-reading-settings::backdrop { background: #00000038; }
.notes-settings-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.notes-reading-settings h2 {
  margin: 0;
  font-family: inherit;
  font-size: 18px;
  font-weight: 600;
  color: inherit;
}
html.font-palatino .notes-reading-settings h2 {
  font-family: 'Avenir', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
.notes-settings-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  margin-inline-end: -8px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  touch-action: manipulation;
}
.notes-settings-close:hover { background: var(--notes-settings-hover); }
.notes-reading-settings fieldset { min-width: 0; border: 0; padding: 0; margin: 0 0 18px; }
.notes-reading-settings legend { padding: 0; margin-bottom: 9px; color: var(--notes-settings-muted); font-size: 13px; }
.notes-font-options, .notes-color-options { display: grid; gap: 10px; }
.notes-font-options { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.notes-color-options { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.notes-settings-choice { position: relative; min-width: 0; cursor: pointer; touch-action: manipulation; }
.notes-settings-choice input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.notes-choice-content {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  min-height: 86px;
  height: 100%;
  padding: 12px;
  border: 1px solid var(--notes-settings-border);
  border-radius: 9px;
  color: inherit;
  background: var(--notes-settings-bg);
}
.notes-settings-choice input:checked + .notes-choice-content {
  border-color: var(--notes-settings-accent);
  box-shadow: inset 0 0 0 1px var(--notes-settings-accent);
  background: var(--notes-settings-selected);
}
.notes-settings-choice input:focus-visible + .notes-choice-content {
  outline: 2px solid var(--notes-settings-accent);
  outline-offset: 3px;
}
.notes-font-sample { font-size: 27px; line-height: 1.1; }
.notes-font-palatino { font-family: Palatino, 'Palatino Linotype', 'Book Antiqua', Georgia, serif; }
.notes-choice-check { display: none; position: absolute; right: 7px; top: 5px; font-size: 12px; color: var(--notes-settings-accent); }
.notes-settings-choice input:checked + .notes-choice-content .notes-choice-check { display: block; }
.notes-color-choice .notes-choice-content { align-items: center; padding: 10px 6px 8px; min-height: 82px; font-size: 13px; }
.notes-color-sample { display: flex; align-items: center; justify-content: center; width: 36px; height: 32px; border: 1px solid #00000020; border-radius: 4px; font: 18px Georgia, serif; }
.notes-sample-light { background: #fff; color: #292524; }
.notes-sample-paper { background: #f0eee6; color: #3d3929; }
.notes-sample-dark { background: #221d18; color: #f1ece3; border-color: #6b6054; }
.notes-settings-done { display: block; width: 100%; min-height: 44px; border: 0; border-radius: 8px; background: var(--notes-settings-accent); color: var(--notes-settings-bg); font: inherit; font-size: 15px; cursor: pointer; touch-action: manipulation; }
@media (max-width: 639px) {
  .notes-reading-settings {
    inset: auto 0 0;
    width: 100vw;
    max-width: 100vw;
    max-height: calc(100vh - 16px);
    max-height: calc(100dvh - 16px);
    padding: 8px 20px max(18px, env(safe-area-inset-bottom));
    border-radius: 18px 18px 0 0;
    border-bottom: 0;
  }
}
@media print {
  .notes-settings-button, .notes-reading-settings { display: none !important; }
}

/* Use a circle-arrow for solution headers, distinct from activity pencils. */
.notes-solution > .myst-admonition-header > svg:first-child {
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.5'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M8 12h8m-4-4 4 4-4 4'/%3E%3C/svg%3E") center / 24px 24px no-repeat;
}
.notes-solution > .myst-admonition-header > svg:first-child > * { visibility: hidden; }