:root {
  color-scheme: light dark;
  --reader-bg: #f5f2ea;
  --reader-surface: #fffdf8;
  --reader-text: #202124;
  --reader-muted: #5f6368;
  --reader-link: #075ea8;
  --reader-visited: #6741a5;
  --reader-border: #d4cec0;
  --reader-focus: #d9480f;
  --reader-width: 76rem;
  font-synthesis: none;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--reader-bg);
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background: var(--reader-bg);
  color: var(--reader-text);
  font-family: Charter, "Bitstream Charter", "Noto Serif", Georgia, serif;
  font-size: clamp(1rem, 0.96rem + 0.18vw, 1.125rem);
  line-height: 1.68;
}

.reader-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem 1.5rem;
  padding: 0.75rem max(1rem, calc((100vw - var(--reader-width)) / 2));
  border-bottom: 1px solid var(--reader-border);
  background: color-mix(in srgb, var(--reader-surface) 94%, transparent);
  backdrop-filter: blur(0.45rem);
  font-family: system-ui, sans-serif;
}

.reader-home {
  color: var(--reader-text);
  font-weight: 750;
  text-decoration: none;
}

.reader-edition {
  color: var(--reader-muted);
  font-size: 0.9rem;
}

.reader-main {
  width: min(calc(100% - 2rem), var(--reader-width));
  min-width: 0;
  min-height: 70vh;
  margin-inline: auto;
  padding: clamp(1.25rem, 3vw, 3.5rem) clamp(0rem, 1vw, 1.25rem) 5rem;
  overflow-wrap: anywhere;
}

.reader-cover {
  max-width: 54rem;
  margin: clamp(2rem, 8vh, 7rem) auto;
  text-align: center;
}

.reader-cover h1 {
  margin-bottom: 0.35em;
  font-size: clamp(2.3rem, 7vw, 4.8rem);
}

.reader-cover-volume {
  margin-block: 0.25em 1.75em;
  font-size: clamp(1.35rem, 4vw, 2.4rem);
}

.reader-cover-author {
  font-size: 1.2rem;
}

.reader-cover hr {
  width: min(18rem, 60%);
  margin-block: 2.5rem;
  border: 0;
  border-top: 0.14rem solid var(--reader-link);
}

.reader-cover-license {
  margin-top: 2rem;
  font-size: 0.95rem;
}

.reader-cover-status {
  color: var(--reader-muted);
  font-size: 0.92rem;
}

.reader-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding: 1.5rem max(1rem, calc((100vw - var(--reader-width)) / 2));
  border-top: 1px solid var(--reader-border);
  color: var(--reader-muted);
  background: var(--reader-surface);
  font-family: system-ui, sans-serif;
  font-size: 0.875rem;
}

.reader-unit {
  display: flow-root;
  min-width: 0;
  scroll-margin-top: 5rem;
}

.reader-anchor-fallback {
  display: block;
  position: relative;
  top: -5rem;
  visibility: hidden;
}

.hint-label {
  display: inline-block;
  margin-inline-end: 0.45em;
  padding: 0.08em 0.55em;
  border: 1px solid var(--reader-border);
  border-radius: 999px;
  background: var(--reader-surface);
  font-family: system-ui, sans-serif;
  font-size: 0.82em;
  font-weight: 700;
}

figure.reader-diagram {
  max-width: 100%;
  margin: 1.5rem auto;
  text-align: center;
}

figure.reader-diagram img {
  display: inline-block;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.5rem;
  left: 0.5rem;
  padding: 0.65rem 0.9rem;
  border-radius: 0.25rem;
  background: var(--reader-text);
  color: var(--reader-surface);
  font-family: system-ui, sans-serif;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 120ms ease-out;
}

.skip-link:focus {
  transform: translateY(0);
}

:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 3px solid var(--reader-focus);
  outline-offset: 3px;
}

a {
  color: var(--reader-link);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.16em;
}

a:visited {
  color: var(--reader-visited);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  max-width: 34em;
  scroll-margin-top: 5rem;
  color: var(--reader-text);
  font-family: system-ui, sans-serif;
  line-height: 1.22;
  text-wrap: balance;
}

.tableofcontents {
  max-width: 68rem;
  margin-block: 2rem;
  padding: clamp(1rem, 2.5vw, 2rem);
  border: 1px solid var(--reader-border);
  border-radius: 0.5rem;
  background: var(--reader-surface);
}

.tableofcontents a {
  display: inline-block;
  padding-block: 0.12rem;
}

.reader-unit-index {
  max-width: 68rem;
  margin-block: 2rem;
  padding: 1rem clamp(1rem, 2.5vw, 2rem);
  border: 1px solid var(--reader-border);
  border-radius: 0.5rem;
  background: var(--reader-surface);
  font-family: system-ui, sans-serif;
}

.reader-unit-index summary {
  cursor: pointer;
  font-weight: 750;
}

.reader-unit-index ol {
  columns: 2 22rem;
}

.reader-unit-index li {
  break-inside: avoid;
  margin-block: 0.25rem;
}

img,
svg {
  max-width: 100%;
  height: auto;
}

table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

math[display="block"],
.math-display,
.displaymath,
mjx-container[display="true"] {
  display: block;
  width: 100%;
  max-width: 100%;
  margin-block: 1.2rem;
  overflow-x: auto;
  overflow-y: hidden;
}

.math.display {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.math.display > mjx-container[display="true"] {
  min-width: 0 !important;
}

mjx-container {
  max-width: 100%;
}

.math.inline {
  display: inline-block;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  vertical-align: middle;
}

pre,
code,
kbd,
samp {
  font-family: "Cascadia Mono", "Noto Sans Mono", Consolas, monospace;
}

pre {
  max-width: 100%;
  padding: 1rem;
  overflow-x: auto;
  border: 1px solid var(--reader-border);
  border-radius: 0.35rem;
  background: var(--reader-surface);
}

@media (prefers-color-scheme: dark) {
  :root {
    --reader-bg: #17191c;
    --reader-surface: #22252a;
    --reader-text: #f0eee8;
    --reader-muted: #b8b4aa;
    --reader-link: #83c5ff;
    --reader-visited: #c4a7ff;
    --reader-border: #464a50;
    --reader-focus: #ff922b;
  }
}

@media (max-width: 42rem) {
  .reader-header {
    position: static;
  }

  html {
    scroll-padding-top: 1rem;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    scroll-margin-top: 1rem;
  }
}

@media print {
  :root {
    color-scheme: light;
    --reader-bg: #fff;
    --reader-surface: #fff;
    --reader-text: #000;
    --reader-muted: #333;
    --reader-border: #bbb;
  }

  .reader-header,
  .reader-footer,
  .skip-link {
    display: none;
  }

  .reader-main {
    width: 100%;
    padding: 0;
  }
}