/*
 * AstroPaper theme for org-mode html export.
 * Visual design follows https://github.com/satnaing/astro-paper
 *
 * Colors are CSS custom properties keyed on html[data-theme], so switching
 * themes is a single attribute change. Source block highlighting expects
 * `org-html-htmlize-output-type' to be `css' (class based token colors).
 */

/* ==================================================================== */
/* Tokens                                                               */
/* ==================================================================== */

:root,
html[data-theme="light"] {
  --background: #fdfdfd;
  --foreground: #282728;
  --accent: #006cac;
  --muted: #e6e6e6;
  --border: #ece9e9;
  --border-strong: #d6d2d2;

  --code-bg: #f6f8fa;
  --code-fg: #24292e;
  --code-border: #e4e1e1;
  --inline-code-bg: rgba(230, 230, 230, 0.75);

  --hl-comment: #6a737d;
  --hl-keyword: #d73a49;
  --hl-string: #032f62;
  --hl-function: #6f42c1;
  --hl-variable: #e36209;
  --hl-type: #22863a;
  --hl-constant: #005cc5;
  --hl-builtin: #005cc5;
  --hl-preprocessor: #d73a49;
  --hl-number: #005cc5;
  --hl-doc: #6a737d;
  --hl-warning: #b31d28;
  --hl-regexp: #22863a;
  --hl-rainbow-1: #6f42c1;
  --hl-rainbow-2: #005cc5;
  --hl-rainbow-3: #22863a;
  --hl-rainbow-4: #e36209;
  --hl-rainbow-5: #d73a49;

  --todo: #d73a49;
  --done: #22863a;
  --toc-shadow: rgba(0, 0, 0, 0.18);

  color-scheme: light;
}

html[data-theme="dark"] {
  --background: #212737;
  --foreground: #eaedf3;
  --accent: #ff6b01;
  --muted: rgba(52, 63, 96, 0.75);
  --border: #ab4b08;
  --border-strong: #ab4b08;

  --code-bg: #011627;
  --code-fg: #d6deeb;
  --code-border: rgba(171, 75, 8, 0.55);
  --inline-code-bg: rgba(52, 63, 96, 0.75);

  --hl-comment: #7f9a9a;
  --hl-keyword: #c792ea;
  --hl-string: #ecc48d;
  --hl-function: #82aaff;
  --hl-variable: #addb67;
  --hl-type: #ffcb8b;
  --hl-constant: #f78c6c;
  --hl-builtin: #7fdbca;
  --hl-preprocessor: #c792ea;
  --hl-number: #f78c6c;
  --hl-doc: #919f9f;
  --hl-warning: #ef5350;
  --hl-regexp: #5ca7e4;
  --hl-rainbow-1: #ffd700;
  --hl-rainbow-2: #da70d6;
  --hl-rainbow-3: #179fff;
  --hl-rainbow-4: #addb67;
  --hl-rainbow-5: #f78c6c;

  --todo: #ff5874;
  --done: #addb67;
  --toc-shadow: rgba(0, 0, 0, 0.55);

  color-scheme: dark;
}

:root {
  --font-app: "IBM Plex Mono", "JetBrains Mono", "Cascadia Code", "SF Mono", Menlo, Consolas,
    ui-monospace, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", monospace;
  --font-code: "JetBrains Mono", "Cascadia Code", "SF Mono", Menlo, Consolas, ui-monospace,
    "PingFang SC", "Microsoft YaHei", monospace;
  --page-padding: clamp(1rem, 4vw, 3rem);
  --radius: 0.375rem;
}

/* ==================================================================== */
/* Base                                                                 */
/* ==================================================================== */

html {
  font-family: var(--font-app);
  background-color: var(--background);
  color: var(--foreground);
  scroll-padding-top: 1.5rem;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--background);
  color: var(--foreground);
  font-size: 1rem;
  line-height: 1.75;
  overflow-wrap: break-word;
}

html.ap-ready body,
html.ap-ready .ap-header,
html.ap-ready .ap-toc,
html.ap-ready pre,
html.ap-ready code,
html.ap-ready .ap-back-to-top {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

::selection {
  background-color: color-mix(in srgb, var(--accent) 75%, transparent);
  color: var(--background);
}

:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 1px;
}

.ap-header svg,
.ap-footer svg,
.ap-go-back svg,
.ap-post-meta svg,
.ap-back-to-top svg {
  width: 1.5rem;
  height: 1.5rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.ap-hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0 var(--page-padding);
}

/* org's own home/up links are replaced by the header */
#org-div-home-and-up {
  display: none;
}

#content,
#postamble,
.ap-header-inner,
.ap-footer-inner {
  box-sizing: border-box;
  width: 100%;
  padding-left: var(--page-padding);
  padding-right: var(--page-padding);
}

#content {
  flex: 1 0 auto;
  padding-bottom: 2rem;
}

/* ==================================================================== */
/* Header                                                               */
/* ==================================================================== */

#skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 50;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: var(--background);
  text-decoration: none;
}

#skip-to-content:focus {
  top: 1rem;
}

.ap-header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  padding-bottom: 0.75rem;
}

.ap-logo {
  font-size: 1.25rem;
  font-weight: 600;
  white-space: nowrap;
  color: var(--foreground);
  text-decoration: none;
}

.ap-logo:hover {
  color: var(--accent);
}

.ap-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  border: none;
  background: transparent;
  color: var(--foreground);
  cursor: pointer;
  border-radius: var(--radius);
}

.ap-icon-btn:hover {
  color: var(--accent);
}

.ap-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ap-menu a {
  display: block;
  padding: 0.25rem 0.75rem;
  font-weight: 500;
  color: var(--foreground);
  text-decoration: none;
}

.ap-menu a:hover {
  color: var(--accent);
}

.ap-menu a.active {
  text-decoration: underline wavy var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

/* Light shows the moon (go dark), dark shows the sun (go light). */
#theme-btn {
  position: relative;
  width: 2rem;
  height: 2rem;
}

#theme-btn > span {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

#theme-btn .ap-icon-sun,
html[data-theme="dark"] #theme-btn .ap-icon-moon {
  transform: rotate(90deg) scale(0);
  opacity: 0;
}

#theme-btn .ap-icon-moon,
html[data-theme="dark"] #theme-btn .ap-icon-sun {
  transform: rotate(0) scale(1);
  opacity: 1;
}

#menu-btn {
  display: none;
}

#menu-btn .ap-icon-close,
.ap-menu-open #menu-btn .ap-icon-menu {
  display: none;
}

.ap-menu-open #menu-btn .ap-icon-close {
  display: inline-flex;
}

@media (max-width: 639px) {
  #menu-btn {
    display: inline-flex;
  }

  .ap-nav {
    width: 100%;
    display: none;
  }

  .ap-menu-open .ap-nav {
    display: block;
  }

  .ap-menu {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    padding: 1rem 0 0.5rem;
    justify-items: center;
  }

  .ap-menu-theme {
    grid-column: 1 / -1;
  }
}

/* ==================================================================== */
/* Post header                                                          */
/* ==================================================================== */

.ap-go-back {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin: 2rem 0 0.5rem;
  color: var(--foreground);
  text-decoration: none;
}

.ap-go-back:hover {
  opacity: 0.75;
}

.ap-go-back svg {
  width: 1.25rem;
  height: 1.25rem;
}

#content h1.title {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.875rem;
  line-height: 1.3;
  font-weight: 700;
  color: var(--accent);
  text-align: left;
}

.ap-go-back + h1.title {
  margin-top: 0.5rem;
}

#content .subtitle {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  opacity: 0.8;
}

.ap-post-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  font-style: italic;
  opacity: 0.8;
}

.ap-post-meta svg {
  width: 1.25rem;
  height: 1.25rem;
  opacity: 0.9;
}

/* ==================================================================== */
/* Table of contents                                                    */
/* ==================================================================== */

/* Layout follows worg_theme: a tab fixed to the top-right corner that
   expands on hover (or stays open after a click, for touch screens). */
.ap-toc {
  position: fixed;
  top: 5rem;
  right: 0;
  z-index: 30;
  box-sizing: border-box;
  max-width: min(50vw, 36rem);
  max-height: 80vh;
  overflow: auto;
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  background-color: var(--background);
  box-shadow: 0 0 1em var(--toc-shadow);
  font-size: 0.85rem;
  line-height: 1.5;
  text-align: right;
  scrollbar-width: thin;
}

.ap-menu-is-open .ap-toc {
  display: none;
}

.ap-toc-title {
  position: sticky;
  top: 0;
  display: block;
  width: 100%;
  margin: 0;
  padding: 0.4rem 0.9rem;
  border: none;
  background-color: var(--background);
  color: var(--foreground);
  font: inherit;
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
  cursor: pointer;
}

.ap-toc-title:hover,
.ap-toc-open .ap-toc-title {
  color: var(--accent);
}

.ap-toc #text-table-of-contents {
  display: none;
  padding: 0 0.9rem 0.75rem 0.5rem;
  text-align: left;
}

.ap-toc-open #text-table-of-contents,
.ap-toc:has(:focus-visible) #text-table-of-contents {
  display: block;
}

@media (hover: hover) {
  .ap-toc:hover #text-table-of-contents {
    display: block;
  }
}

@media (max-width: 639px) {
  .ap-toc {
    max-width: 85vw;
  }
}

#content .ap-toc ul {
  list-style: none;
  margin: 0.125rem 0;
  padding-left: 1rem;
}

#content .ap-toc #text-table-of-contents > ul {
  padding-left: 0.25rem;
}

#content .ap-toc li {
  margin: 0.125rem 0;
}

#content .ap-toc a {
  color: var(--foreground);
  text-decoration: none;
  opacity: 0.85;
}

#content .ap-toc a:hover {
  color: var(--accent);
  opacity: 1;
}

#content .ap-toc a.active {
  color: var(--accent);
  font-weight: 600;
  opacity: 1;
}

/* ==================================================================== */
/* Prose                                                                */
/* ==================================================================== */

#content h2,
#content h3,
#content h4,
#content h5,
#content h6 {
  margin: 2em 0 0.75em;
  font-weight: 700;
  line-height: 1.4;
  color: var(--foreground);
}

#content h2 { font-size: 1.5rem; }
#content h3 { font-size: 1.3rem; }
#content h4 { font-size: 1.15rem; }
#content h5 { font-size: 1.05rem; }
#content h6 { font-size: 1rem; opacity: 0.9; }

.heading-link {
  margin-left: 0.5rem;
  color: var(--accent);
  font-weight: 400;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}

h2:hover > .heading-link,
h3:hover > .heading-link,
h4:hover > .heading-link,
h5:hover > .heading-link,
h6:hover > .heading-link,
.heading-link:focus-visible {
  opacity: 1;
}

@media (hover: none) {
  .heading-link {
    opacity: 0.5;
  }
}

#content p,
#content ul,
#content ol,
#content dl {
  margin: 1em 0;
}

#content ul,
#content ol {
  padding-left: 1.625em;
}

#content li {
  margin: 0.25em 0;
}

#content li > p {
  margin: 0.5em 0;
}

#content li::marker {
  color: var(--accent);
}

#content dt {
  font-weight: 600;
}

#content dd {
  margin: 0.25em 0 0.75em 1.625em;
}

#content a,
#postamble a {
  color: var(--foreground);
  text-decoration: underline dashed;
  text-underline-offset: 4px;
  overflow-wrap: anywhere;
}

#content a:hover,
#postamble a:hover {
  color: var(--accent);
}

#content .ap-toc a,
#content .heading-link,
#content .ap-go-back {
  text-decoration: none;
}

#content b,
#content strong {
  font-weight: 700;
}

#content .underline {
  text-decoration: underline;
}

#content hr {
  border: none;
  border-top: 1px dashed var(--border-strong);
  margin: 2.5em 0;
}

#content blockquote {
  margin: 1.5em 0;
  padding: 0.25em 0 0.25em 1em;
  border-left: 4px solid color-mix(in srgb, var(--accent) 80%, transparent);
  opacity: 0.85;
  font-style: italic;
}

#content .verse {
  font-style: italic;
  opacity: 0.9;
}

#content .org-center {
  text-align: center;
}

#content .org-right {
  text-align: right;
}

#content .org-left {
  text-align: left;
}

/* Images & figures */
#content img,
#content svg.org-svg,
#content object.org-svg {
  max-width: 100%;
  height: auto;
}

#content .figure {
  margin: 1.5em 0;
  text-align: center;
}

#content .figure p {
  margin: 0.5em 0;
}

#content .figure-number,
#content .table-number,
#content .listing-number {
  font-weight: 600;
  color: var(--accent);
}

#content .figure p:last-child,
#content caption {
  font-size: 0.875rem;
  opacity: 0.85;
}

/* Tables */
.ap-table-wrapper {
  margin: 1.5em 0;
  overflow-x: auto;
}

#content table {
  border-collapse: collapse;
  border: none;
  font-size: 0.9rem;
  line-height: 1.5;
}

#content caption {
  caption-side: top;
  padding-bottom: 0.5em;
  text-align: left;
}

#content th,
#content td {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border-strong);
  vertical-align: top;
}

#content thead th {
  background-color: var(--muted);
  font-weight: 600;
}

#content tbody tr:nth-child(even) td {
  background-color: color-mix(in srgb, var(--muted) 35%, transparent);
}

/* Org keywords, tags, timestamps */
#content .todo,
#content .done {
  font-weight: 700;
  font-size: 0.85em;
  letter-spacing: 0.02em;
}

#content .todo {
  color: var(--todo);
}

#content .done {
  color: var(--done);
}

#content .tag {
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  margin-left: 0.5rem;
  font-size: 0;
  font-weight: 400;
}

#content .tag > span {
  margin-right: 0.25rem;
  padding: 0 0.4rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  font-size: 0.75rem;
  line-height: 1.6;
  opacity: 0.85;
}

#content .timestamp,
#content .timestamp-wrapper {
  font-size: 0.875em;
  opacity: 0.8;
}

/* Footnotes */
#content .footnotes {
  margin-top: 3rem;
  font-size: 1.25rem;
}

#content .footdef {
  display: flex;
  gap: 0.5rem;
  font-size: 0.9rem;
}

#content .footdef .footpara {
  margin: 0;
}

#content sup a.footref,
#content sup a.footnum {
  text-decoration: none;
  color: var(--accent);
}

/* ==================================================================== */
/* Code                                                                 */
/* ==================================================================== */

#content code,
#content kbd,
#content samp {
  font-family: var(--font-code);
  font-size: 0.875em;
  padding: 0.125em 0.375em;
  border-radius: 0.25rem;
  background-color: var(--inline-code-bg);
  overflow-wrap: anywhere;
}

#content kbd {
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
}

.org-src-container {
  margin: 1.25em 0;
}

.org-src-container > label.org-src-name {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  opacity: 0.85;
}

.ap-code-block {
  position: relative;
  margin: 1.25em 0;
}

.org-src-container .ap-code-block {
  margin: 0;
}

#content pre {
  box-sizing: border-box;
  margin: 1.25em 0;
  padding: 1rem 1.125rem;
  overflow-x: auto;
  border: 1px solid var(--code-border);
  border-radius: var(--radius);
  background-color: var(--code-bg);
  color: var(--code-fg);
  font-family: var(--font-code);
  font-size: 0.85rem;
  line-height: 1.65;
  tab-size: 4;
  white-space: pre;
  overflow-wrap: normal;
}

#content pre,
#content code,
#content kbd,
#content samp {
  font-variant-ligatures: none;
}

#content .ap-code-block > pre {
  margin: 0;
}

/* org-mode's default stylesheet puts a language label in ::before */
#content pre.src::before {
  content: none;
}

/* Pages exported before switching to css htmlize carry inline Emacs colors
   tuned for a dark background: keep their block dark in both themes. */
#content pre.src:has(span[style]) {
  background-color: #292e34;
  color: #b2b2b2;
  border-color: #3b4048;
}

.ap-code-toolbar {
  position: absolute;
  top: 0.4rem;
  right: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transition: opacity 0.2s ease;
  font-size: 0.75rem;
  line-height: 1;
}

.ap-code-block:hover .ap-code-toolbar,
.ap-code-block:focus-within .ap-code-toolbar {
  opacity: 1;
}

@media (hover: none) {
  .ap-code-toolbar {
    opacity: 0.85;
  }
}

.ap-code-lang {
  color: var(--code-fg);
  opacity: 0.6;
  text-transform: lowercase;
}

pre.src:has(span[style]) + .ap-code-toolbar .ap-code-lang {
  color: #b2b2b2;
}

.ap-copy-btn {
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--code-border);
  border-radius: 0.25rem;
  background-color: var(--background);
  color: var(--foreground);
  font-family: inherit;
  font-size: 0.75rem;
  cursor: pointer;
}

.ap-copy-btn:hover,
.ap-copy-btn.copied {
  color: var(--accent);
  border-color: var(--accent);
}

.ap-copy-buffer {
  position: fixed;
  top: -1000px;
  opacity: 0;
}

#content .linenr {
  display: inline-block;
  min-width: 2.5em;
  margin-right: 0.75em;
  opacity: 0.45;
  user-select: none;
}

#content .code-highlighted {
  background-color: color-mix(in srgb, var(--accent) 25%, transparent);
}

pre.mermaid,
#content pre.mermaid {
  background: transparent;
  border: none;
  text-align: center;
  white-space: pre;
  color: var(--foreground);
}

pre.mermaid:not([data-processed]) {
  opacity: 0.4;
}

pre.mermaid svg {
  max-width: 100%;
  height: auto;
}

/* htmlize (css output) token classes */
.org-comment,
.org-comment-delimiter {
  color: var(--hl-comment);
  font-style: italic;
}

.org-doc {
  color: var(--hl-doc);
  font-style: italic;
}

.org-keyword,
.org-negation-char {
  color: var(--hl-keyword);
}

.org-string,
.org-string-escape {
  color: var(--hl-string);
}

.org-function-name,
.org-function-call,
.org-method-call {
  color: var(--hl-function);
}

.org-variable-name,
.org-variable-use,
.org-property-name,
.org-property-use {
  color: var(--hl-variable);
}

.org-type {
  color: var(--hl-type);
}

.org-constant,
.org-highlight-numbers-number,
.org-number {
  color: var(--hl-number);
}

.org-builtin {
  color: var(--hl-builtin);
}

.org-preprocessor {
  color: var(--hl-preprocessor);
}

.org-warning,
.org-error {
  color: var(--hl-warning);
  font-weight: 600;
}

.org-regexp-grouping-backslash,
.org-regexp-grouping-construct,
.org-regexp,
.org-escape {
  color: var(--hl-regexp);
}

.org-sh-quoted-exec,
.org-sh-heredoc {
  color: var(--hl-string);
}

.org-css-selector,
.org-nxml-element-local-name,
.org-web-mode-html-tag {
  color: var(--hl-keyword);
}

.org-css-property,
.org-nxml-attribute-local-name,
.org-web-mode-html-attr-name {
  color: var(--hl-variable);
}

.org-rainbow-delimiters-depth-1,
.org-rainbow-delimiters-depth-6 { color: var(--hl-rainbow-1); }
.org-rainbow-delimiters-depth-2,
.org-rainbow-delimiters-depth-7 { color: var(--hl-rainbow-2); }
.org-rainbow-delimiters-depth-3,
.org-rainbow-delimiters-depth-8 { color: var(--hl-rainbow-3); }
.org-rainbow-delimiters-depth-4,
.org-rainbow-delimiters-depth-9 { color: var(--hl-rainbow-4); }
.org-rainbow-delimiters-depth-5 { color: var(--hl-rainbow-5); }

.org-rainbow-delimiters-unmatched,
.org-rainbow-delimiters-mismatched {
  color: var(--hl-warning);
}

/* ==================================================================== */
/* Postamble (comments) & footer                                        */
/* ==================================================================== */

#postamble {
  margin-top: 1rem;
  padding-top: 1.5rem;
  padding-bottom: 2rem;
  border-top: 1px dashed var(--border-strong);
}

#postamble:empty {
  display: none;
}

html[data-theme="dark"] .vssue {
  color: var(--foreground);
}

html[data-theme="dark"] .vssue textarea,
html[data-theme="dark"] .vssue input {
  background-color: var(--code-bg);
  color: var(--foreground);
  border-color: var(--code-border);
}

html[data-theme="dark"] .vssue .markdown-body,
html[data-theme="dark"] .vssue .vssue-comment-body {
  color: inherit;
  background: transparent;
}

.ap-footer {
  margin-top: auto;
}

.ap-footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  font-size: 0.875rem;
}

.ap-socials {
  display: flex;
  gap: 0.5rem;
}

.ap-socials a {
  display: inline-flex;
  padding: 0.25rem;
  color: var(--foreground);
}

.ap-socials a:hover {
  color: var(--accent);
}

.ap-sep {
  margin: 0 0.5rem;
  opacity: 0.6;
}

@media (min-width: 640px) {
  .ap-footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ==================================================================== */
/* Scroll widgets                                                       */
/* ==================================================================== */

.ap-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: 3px;
  pointer-events: none;
}

.ap-progress-bar {
  height: 100%;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}

.ap-back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: 9999px;
  background-color: var(--background);
  color: var(--foreground);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.ap-back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.ap-back-to-top:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.ap-back-to-top svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* ==================================================================== */
/* Print                                                                */
/* ==================================================================== */

@media print {
  .ap-header,
  .ap-footer,
  .ap-progress,
  .ap-back-to-top,
  .ap-go-back,
  .ap-code-toolbar,
  .heading-link,
  #postamble {
    display: none !important;
  }

  .ap-toc {
    position: static !important;
    max-width: none !important;
    max-height: none !important;
    box-shadow: none !important;
    text-align: left !important;
  }

  .ap-toc #text-table-of-contents {
    display: block !important;
  }
}