:root {
  color-scheme: light;
  --bg: #eef2ed;
  --paper: #fffdf8;
  --ink: #191816;
  --muted: #6d665c;
  --line: #cbd2c7;
  --accent: #8b2f24;
  --accent-2: #0c6670;
  --toc-bg: #e2e8df;
  --shadow: 0 18px 48px rgba(34, 29, 22, 0.12);
  --measure: 72ch;
  --chrome: 64px;
  --position-offset: 0px;
  --font-body: ui-serif, Georgia, "Times New Roman", serif;
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1c1e1d;
  --paper: #242724;
  --ink: #eee8db;
  --muted: #b9b0a1;
  --line: #4d493f;
  --accent: #e07a62;
  --accent-2: #73c8c9;
  --toc-bg: #181a19;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-padding-top: calc(var(--chrome) + var(--position-offset) + 20px);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-body);
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent-2);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

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

img {
  display: block;
  max-width: 100%;
  height: auto;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--accent);
  font-family: var(--font-ui);
}

.skip-link:focus {
  top: 1rem;
}

.site-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: var(--chrome);
  padding: 0 1rem 0 1.25rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  font-family: var(--font-ui);
}

.site-bar__brand {
  min-width: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-bar__brand a {
  color: inherit;
  text-decoration: none;
}

.site-bar__meta {
  margin-left: 0.75rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.site-bar__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  justify-content: flex-end;
}

.icon-button {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  background: var(--paper);
  font: 700 1rem/1 var(--font-ui);
  cursor: pointer;
}

.icon-button--text {
  font-size: 0.82rem;
}

.icon-button:hover,
.icon-button[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

.icon-button[aria-pressed="true"] {
  background: color-mix(in srgb, var(--accent) 9%, var(--paper));
}

.icon-button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.reading-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
}

.reader-position {
  position: sticky;
  top: var(--chrome);
  z-index: 9;
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) 2.4rem;
  align-items: center;
  min-height: var(--position-offset);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(14px);
  font-family: var(--font-ui);
}

body.reading-mode .reader-position {
  display: none;
}

.reader-position a {
  min-width: 0;
  color: var(--muted);
  text-decoration: none;
}

.reader-position__step {
  display: grid;
  height: 100%;
  place-items: center;
  font-size: 1rem;
  font-weight: 800;
}

.reader-position__current {
  overflow: hidden;
  padding: 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.reader-position a:hover,
.reader-position a:focus-visible {
  color: var(--accent);
}

.content {
  width: min(100% - 2rem, var(--measure));
  margin: 0 auto;
  padding: 4rem 0 7rem;
}

.doc-reader .content {
  padding-left: 0;
  padding-right: 0;
}

.doc-verbatim .content {
  --measure: 68ch;
}

h1,
h2,
h3,
h4 {
  line-height: 1.15;
  text-wrap: balance;
}

h1.title {
  margin: 0 0 3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font-family: var(--font-ui);
  font-size: clamp(2.3rem, 6vw, 5rem);
  letter-spacing: 0;
}

h2 {
  margin: 4rem 0 1rem;
  color: var(--accent);
  font-family: var(--font-ui);
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  letter-spacing: 0;
}

h3 {
  margin: 2.6rem 0 0.8rem;
  color: var(--accent-2);
  font-family: var(--font-ui);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  letter-spacing: 0;
}

h4 {
  margin: 2rem 0 0.6rem;
  font-family: var(--font-ui);
  font-size: 1rem;
}

p,
li {
  font-size: 1.08rem;
}

p {
  margin: 0 0 1.15rem;
}

.doc-verbatim p {
  margin-bottom: 1.05rem;
}

blockquote {
  margin: 2rem 0;
  padding: 0.2rem 0 0.2rem 1.25rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 22rem);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
  min-height: calc(100vh - var(--chrome) - 8rem);
}

.cover__text {
  min-width: 0;
}

.cover h2:first-child {
  margin-top: 0;
}

.cover h2:first-child::after {
  display: block;
  width: 5rem;
  height: 3px;
  margin-top: 1.2rem;
  background: var(--accent);
  content: "";
}

.cover__image {
  position: sticky;
  top: calc(var(--chrome) + 2rem);
}

.archive-mosaic,
.archive-plate {
  margin: 0;
}

.archive-mosaic {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 0.75rem;
  align-items: stretch;
}

.archive-mosaic img,
.archive-plate img {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
  filter: saturate(0.88) contrast(1.02);
}

.archive-mosaic__primary {
  grid-row: span 2;
}

.archive-mosaic figcaption,
.archive-plate figcaption {
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  line-height: 1.4;
}

.archive-mosaic figcaption {
  grid-column: 1 / -1;
}

.cover ul {
  display: grid;
  gap: 1rem;
  padding: 0;
  margin: 2rem 0 0;
  list-style: none;
}

.cover li {
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  font-family: var(--font-ui);
  font-size: 1rem;
}

.cover li a {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 800;
  text-decoration: none;
}

.reader-toc {
  position: fixed;
  top: var(--chrome);
  left: 0;
  bottom: 0;
  z-index: 8;
  width: min(22rem, 86vw);
  padding: 1.25rem;
  overflow: auto;
  border-right: 1px solid var(--line);
  background: var(--toc-bg);
  font-family: var(--font-ui);
  transform: translateX(-100%);
  transition: transform 180ms ease;
}

body.toc-open .reader-toc {
  transform: translateX(0);
}

body.reading-mode .reader-toc,
body.reading-mode .site-bar__meta {
  display: none;
}

body.reading-mode .content {
  --measure: 66ch;
}

.reader-toc h2 {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reader-toc ul {
  padding-left: 0;
  margin: 0;
  list-style: none;
}

.reader-toc ul ul {
  padding-left: 0.85rem;
  margin: 0.35rem 0 0.55rem;
  border-left: 1px solid var(--line);
}

.reader-toc li {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.35;
}

.reader-toc a {
  display: block;
  padding: 0.28rem 0;
  color: var(--muted);
  text-decoration: none;
}

.reader-toc a:hover,
.reader-toc a.is-active {
  color: var(--accent);
}

.figure-index {
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.figure-index summary {
  color: var(--accent);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.figure-index ol {
  display: grid;
  gap: 0.25rem;
  max-height: 22rem;
  padding-left: 1.4rem;
  margin: 0.75rem 0 0;
  overflow: auto;
}

.figure-index li {
  padding-left: 0.15rem;
}

.figure-index button {
  display: block;
  width: 100%;
  border: 0;
  color: var(--muted);
  background: transparent;
  font: 500 0.82rem/1.35 var(--font-ui);
  text-align: left;
  cursor: pointer;
}

.figure-index button:hover {
  color: var(--accent);
}

.chapter-overview {
  margin: -1rem 0 3.5rem;
  padding: 1rem 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-ui);
}

.archive-plate + .chapter-overview {
  margin-top: -1.75rem;
}

.chapter-overview h2 {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chapter-overview ol {
  display: grid;
  gap: 0;
  padding: 0;
  margin: 0;
  list-style: none;
}

.chapter-overview li {
  border-top: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}

.chapter-overview a {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.65rem 1rem;
  padding: 0.9rem 0;
  color: var(--ink);
  text-decoration: none;
}

.chapter-overview a:hover strong {
  color: var(--accent);
}

.chapter-overview a.is-active strong {
  color: var(--accent);
}

.chapter-overview a.is-active span {
  color: var(--accent);
}

.chapter-overview span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.chapter-overview strong {
  color: var(--accent-2);
  font-size: 1rem;
  line-height: 1.25;
}

.chapter-overview em {
  grid-column: 2;
  color: var(--muted);
  font-size: 0.86rem;
  font-style: normal;
  line-height: 1.45;
}

.search-panel {
  position: fixed;
  top: var(--chrome);
  right: 0;
  bottom: 0;
  z-index: 12;
  display: grid;
  grid-template-rows: auto auto 1fr;
  width: min(32rem, 92vw);
  padding: 1rem;
  border-left: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
  font-family: var(--font-ui);
  transform: translateX(100%);
  transition: transform 180ms ease;
}

body.search-open .search-panel {
  transform: translateX(0);
}

.search-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.search-panel__header label {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.search-panel input {
  width: 100%;
  min-height: 2.8rem;
  padding: 0 0.85rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  background: var(--bg);
  font: 500 1rem/1 var(--font-ui);
}

.search-panel__results {
  min-height: 0;
  margin-top: 1rem;
  overflow: auto;
}

.search-panel__results ol {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.search-panel__results a {
  display: grid;
  gap: 0.2rem;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--bg);
  text-decoration: none;
}

.search-panel__results a:hover {
  border-color: var(--accent);
}

.search-panel__results strong {
  color: var(--accent);
  font-size: 0.98rem;
}

.search-panel__results span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.search-panel__results em,
.search-panel__hint {
  color: var(--muted);
  font-size: 0.9rem;
  font-style: normal;
  line-height: 1.45;
}

.section-nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  margin-top: 5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-ui);
}

.section-nav__current {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.section-nav__link {
  min-width: 0;
  padding: 0.75rem 0;
  color: var(--accent-2);
  font-size: 0.9rem;
  font-weight: 700;
  overflow-wrap: anywhere;
  text-decoration: none;
}

.section-nav__next {
  text-align: right;
}

.section-nav__link:hover {
  color: var(--accent);
}

.figure {
  margin: 2.4rem 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.figure img {
  margin: 0 auto;
  cursor: zoom-in;
}

.formula-image {
  display: flex;
  justify-content: center;
  margin: 1.5rem 0;
  padding: 0.75rem;
  overflow-x: auto;
  border-block: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 72%, transparent);
}

.formula-image img {
  max-width: none;
  cursor: default;
}

.figure p {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  line-height: 1.45;
}

.dialogue {
  position: relative;
  margin: 1.35rem 0;
  padding: 0.9rem 1rem 0.9rem 3.7rem;
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--paper) 78%, transparent);
}

.dialogue > span:first-child {
  position: absolute;
  left: 0.9rem;
  top: 0.85rem;
  display: grid;
  width: 2.1rem;
  height: 2.1rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--accent);
  background: var(--paper);
  font: 800 0.82rem/1 var(--font-ui);
}

.dialogue-fritz > span:first-child {
  color: var(--accent-2);
}

.dialogue-fritz {
  border-left-color: var(--accent-2);
}

.dialogue-question + .dialogue-fritz,
.dialogue-fritz + .dialogue-question {
  margin-top: -0.65rem;
}

.archive-plate {
  display: grid;
  grid-template-columns: 1fr 0.86fr 0.86fr;
  gap: 0.75rem;
  align-items: stretch;
  margin: -1.5rem 0 3rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.archive-plate img {
  aspect-ratio: 4 / 3;
}

.archive-plate img:first-child {
  aspect-ratio: 3 / 4;
}

.archive-plate figcaption {
  grid-column: 1 / -1;
}

.doc-verbatim .outline-text-2 > p:not(.dialogue) {
  text-indent: 1.4em;
}

.doc-verbatim .outline-text-2 > p.dialogue + p:not(.dialogue),
.doc-verbatim .outline-text-2 > p:not(.dialogue):first-child {
  text-indent: 0;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(15, 14, 13, 0.88);
}

.lightbox.is-open {
  display: flex;
}

.lightbox img {
  max-width: min(96vw, 1100px);
  max-height: 88vh;
  border-radius: 8px;
  background: #fff;
}

.lightbox button {
  position: fixed;
  top: 1rem;
  right: 1rem;
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  background: rgba(0, 0, 0, 0.35);
}

@media (min-width: 1200px) {
  body.toc-open .content {
    transform: translateX(8rem);
  }

  .content {
    transition: transform 180ms ease;
  }
}

@media (max-width: 820px) {
  .content {
    width: min(100% - 1.25rem, var(--measure));
    padding-top: 2rem;
  }

  .cover {
    grid-template-columns: 1fr;
  }

  .cover__image {
    position: static;
  }

  h1.title {
    font-size: 2.4rem;
  }

  .site-bar__meta {
    display: none;
  }

  .section-nav {
    grid-template-columns: 1fr;
  }

  .section-nav__current,
  .section-nav__next {
    text-align: left;
  }

  .chapter-overview a {
    grid-template-columns: 2rem minmax(0, 1fr);
  }

  .archive-plate {
    grid-template-columns: 1fr 1fr;
  }

  .archive-plate img:first-child {
    grid-row: span 2;
  }
}

@media (max-width: 520px) {
  :root {
    --chrome: 88px;
  }

  .site-bar {
    grid-template-columns: 1fr;
    gap: 0.45rem;
    padding-left: 0.75rem;
    padding-top: 0.45rem;
    padding-bottom: 0.45rem;
  }

  .site-bar__brand {
    font-size: 0.72rem;
  }

  .site-bar__nav {
    justify-content: space-between;
  }

  .icon-button {
    width: 2rem;
    height: 2rem;
  }

  .archive-mosaic,
  .archive-plate {
    grid-template-columns: 1fr;
  }

  .archive-mosaic__primary,
  .archive-plate img:first-child {
    grid-row: auto;
  }

  p,
  li {
    font-size: 1rem;
  }

  .figure {
    margin-left: -0.35rem;
    margin-right: -0.35rem;
    padding: 0.65rem;
  }

  .dialogue {
    padding: 0.85rem 0.85rem 0.85rem 3.1rem;
  }

  .dialogue > span:first-child {
    left: 0.75rem;
    width: 1.8rem;
    height: 1.8rem;
  }

  .chapter-overview em {
    grid-column: 1 / -1;
  }
}