:root {
  color-scheme: light;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 18px;
  color: #252525;
  background: #fafafa;
  --ink: #252525;
  --quiet: #5b5b5b;
  --paper: #fff;
  --wash: #f0f0f0;
  --line: #d1d1d1;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 1.5rem; }
body { margin: 0; line-height: 1.65; }
main { background: var(--paper); padding-bottom: 4rem; }
main:focus { outline: none; }
header, main, footer, section, aside, figure, div { min-width: 0; }
h1, h2, h3, p, ul, ol, dl, figure { margin: 0; }
h1, h2, h3 { font-weight: 400; line-height: 1.16; text-wrap: balance; }
h1 { font-size: clamp(2.4rem, 4.6vw, 3.7rem); letter-spacing: -.045em; }
h1 em { font-weight: 400; }
h2, [data-role="chapter-subheading"] { font-size: clamp(1.65rem, 2.6vw, 2.25rem); letter-spacing: -.025em; }
h3 { font-size: 1.4rem; }
p, li, dd, [data-role="note-body"] { max-width: 67ch; }
p + p { margin-top: 1rem; }
h2 + p, h3 + p { margin-top: 1.2rem; }
ul, ol { padding-left: 1.25rem; }
li + li { margin-top: .7rem; }
dt, [data-role="note-title"] { font-size: 1.18rem; line-height: 1.35; }
dd, [data-role="note-body"] { margin: .65rem 0 0; }
a { color: inherit; text-decoration-thickness: .075em; text-underline-offset: .2em; }
a:hover { text-decoration-thickness: .13em; }
a, button, input, summary { -webkit-tap-highlight-color: #d9d9d9; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 5px;
}
button, input { font: inherit; color: inherit; }
button { cursor: pointer; min-height: 48px; padding: .45rem 1rem; }
input { min-width: 0; min-height: 52px; border: 1px solid #797979; border-radius: .35rem; padding: .65rem .85rem; background: #fff; }
input::placeholder { color: #626262; opacity: 1; }
img { display: block; width: 100%; max-width: 100%; height: auto; }
[hidden] { display: none !important; }

[data-role="skip-link"] {
  position: absolute;
  left: 1rem;
  top: .5rem;
  z-index: 10;
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: .5rem 1rem;
  color: #fff;
  background: var(--ink);
  transform: translateY(-160%);
}
[data-role="skip-link"]:focus { transform: translateY(0); }
[data-role="site-header"], [data-role="site-footer"] { width: min(1160px, calc(100% - 5rem)); margin-inline: auto; }
[data-role="masthead-row"] { display: flex; justify-content: space-between; align-items: center; gap: 2rem; min-height: 130px; padding-block: 1.5rem; }
[data-role="masthead"] { display: inline-flex; align-items: center; gap: 1rem; min-height: 54px; text-decoration: none; font-size: 1.45rem; line-height: 1.2; letter-spacing: -.025em; }
[data-role="masthead-note"] { display: block; font-size: .9rem; line-height: 1.7; letter-spacing: 0; color: var(--quiet); }
[data-role="book-mark"] { position: relative; width: 30px; height: 35px; border: 2px solid #555; border-radius: 3px 9px 9px 3px; transform: rotate(-8deg); }
[data-role="book-mark"]::before { content: ""; position: absolute; inset: -2px auto -2px 5px; border-left: 2px solid #555; }
[data-role="header-note"] { color: var(--quiet); font-size: .95rem; line-height: 1.35; text-align: right; }
[data-role="question-tabs"] { display: grid; grid-template-columns: repeat(4, 1fr); gap: .5rem; position: relative; z-index: 1; }
[data-role="question-tabs"] a { display: flex; flex-direction: column; justify-content: center; gap: .1rem; min-height: 83px; padding: .8rem 1.2rem; background: #ededed; border-radius: 14px 14px 0 0; text-decoration: none; border-bottom: 3px solid transparent; }
[data-role="question-tabs"] a:hover { background: #e2e2e2; }
[data-role="question-tabs"] a[aria-current="page"] { background: #fff; border-bottom-color: var(--ink); }
[data-role="tab-step"] { color: var(--quiet); font-size: .9rem; }
[data-role="opening"], [data-role="chapter-opening"], [data-role="short-answer"], [data-role="depth"], [data-role="glossary"], [data-role="source-drawer"], [data-role="next-chapter"], [data-role="urgent-help"] {
  width: min(1160px, calc(100% - 5rem));
  margin-inline: auto;
}
[data-role="opening"] { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); align-items: center; gap: 3.8rem; padding-block: 4.1rem 4.7rem; }
[data-role="chapter-line"] { font-size: .95rem; color: var(--quiet); margin-bottom: 1.5rem; }
[data-role="lead"] { font-size: 1.17rem; line-height: 1.6; max-width: 52ch; margin-top: 1.5rem; }
[data-role="primary-link"] { display: inline-flex; gap: 1.4rem; align-items: center; justify-content: space-between; min-height: 54px; margin-top: 1.8rem; padding: .65rem 1.15rem; background: var(--ink); color: #fff; border-radius: 30px; text-decoration: none; }
[data-role="primary-link"]:hover { background: #444; }
[data-role="still-life"] { align-self: center; }
[data-role="image-field"] { position: relative; width: 100%; aspect-ratio: 1; overflow: hidden; background: #ececec; border-radius: 48% 48% 6px 6px; }
[data-role="image-field"] img { position: relative; z-index: 1; aspect-ratio: 1; object-fit: cover; color: transparent; font-size: 0; }
[data-role="paper-fallback"] { position: absolute; inset: 0; background: linear-gradient(120deg, #f5f5f5, #e7e7e7); }
[data-role="paper-fallback"] span:first-child { position: absolute; width: 62%; height: 44%; left: 13%; top: 40%; transform: rotate(-12deg); background: #fff; box-shadow: 5px 12px 20px #00000012; border-radius: 3px; }
[data-role="paper-fallback"] span:nth-child(2) { position: absolute; width: 1px; height: 44%; top: 40%; left: 43%; transform: rotate(-12deg); background: #dedede; }
[data-role="paper-fallback"] span:last-child { position: absolute; width: 15%; height: 10%; right: 10%; bottom: 13%; transform: rotate(20deg); border-radius: 50%; background: #8b8b8b; }
figcaption { color: var(--quiet); font-size: .9rem; line-height: 1.5; margin-top: .8rem; text-align: center; }
[data-role="short-answer"] { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 2.2rem; border-radius: 12px; background: var(--wash); padding: 2.5rem; }
[data-role="section-note"], [data-role="margin-note"] { font-size: .95rem; color: var(--quiet); line-height: 1.5; }
[data-role="section-note"] { padding-top: .35rem; }
[data-role="depth"] { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 2.2rem; padding: 4.5rem 2.5rem; }
[data-role="margin-note"] { padding-top: .4rem; }
[data-role="reading-column"] { max-width: 69ch; }
[data-role="product-notes"], [data-role="cost-notes"], [data-role="caution-notes"] { margin-top: 2rem; }
[data-role="product-notes"] > :is(div, section), [data-role="cost-notes"] > :is(div, section), [data-role="caution-notes"] > :is(div, section) { padding-block: 1.6rem; border-top: 2px solid #dedede; }
[data-role="product-notes"] > :is(div, section):last-child, [data-role="cost-notes"] > :is(div, section):last-child, [data-role="caution-notes"] > :is(div, section):last-child { padding-bottom: 0; }
[data-role="chapter-opening"] { padding: 4rem 2.5rem 3.5rem; }
[data-role="chapter-opening"] h1 { max-width: 19ch; }
[data-role="chapter-opening"] [data-role="lead"] { max-width: 59ch; }
[data-role="text-link"] { display: inline-flex; justify-content: space-between; align-items: center; min-height: 48px; gap: 1.2rem; margin-top: 1.2rem; padding-block: .5rem; }
[data-role="question-list"] { list-style: none; padding: 0; margin-block: 1.5rem; }
[data-role="question-list"] li { padding: .8rem 0 .8rem 1.6rem; position: relative; border-bottom: 1px solid #d6d6d6; margin: 0; }
[data-role="question-list"] li::before { content: "—"; position: absolute; left: 0; color: #666; }
[data-role="glossary"] { padding: 2.5rem; background: #f0f0f0; border-radius: 12px; }
[data-role="glossary"] h2 { margin-top: .6rem; }
[data-role="filter-controls"] { margin-top: 1.7rem; max-width: 620px; }
[data-role="filter-controls"] label { display: block; margin-bottom: .45rem; }
[data-role="filter-row"] { display: flex; gap: .7rem; }
[data-role="filter-row"] input { flex: 1; }
[data-role="clear-filter"] { background: #fff; border: 1px solid #797979; border-radius: 6px; }
[data-role="clear-filter"]:hover { background: #e1e1e1; }
[data-role="filter-status"] { font-size: .95rem; color: var(--quiet); margin-top: .7rem; }
[data-role="word-list"] { margin-top: 1.5rem; display: grid; grid-template-columns: 1fr 1fr; column-gap: 2.5rem; }
[data-role="word"] { padding-block: 1.3rem; border-top: 1px solid #bdbdbd; }
[data-role="word"] dd { font-size: 1rem; }
[data-role="no-matches"] { margin-top: 1.5rem; }
[data-role="source-drawer"] { margin-top: 3.5rem; border-top: 2px solid #959595; border-bottom: 2px solid #959595; }
[data-role="source-drawer"] summary { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 76px; padding: 1.1rem 1.4rem; list-style: none; cursor: pointer; font-size: 1.05rem; }
[data-role="source-drawer"] summary::-webkit-details-marker { display: none; }
[data-role="source-drawer"] summary::after { content: "+"; font-family: Georgia, serif; font-size: 1.7rem; line-height: 1; flex: 0 0 auto; }
[data-role="source-drawer"][open] summary::after { content: "−"; }
[data-role="source-drawer"] summary:hover { background: #f5f5f5; }
[data-role="drawer-body"] { padding: .5rem 1.4rem 1.5rem; }
[data-role="drawer-body"] ul { list-style: none; padding: .6rem 0 0; }
[data-role="drawer-body"] li { margin: 0; max-width: none; }
[data-role="drawer-body"] a { display: flex; justify-content: space-between; align-items: center; gap: 1rem; min-height: 52px; padding-block: .6rem; }
[data-role="next-chapter"] { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 110px; margin-top: 2.5rem; padding: 1.5rem 2rem; background: #e8e8e8; text-decoration: none; border-radius: 12px; font-size: 1.35rem; line-height: 1.35; }
[data-role="next-chapter"] > span:last-child { font-size: 2rem; }
[data-role="next-chapter"]:hover { background: #dedede; }
[data-role="next-note"] { display: block; color: var(--quiet); font-size: .9rem; margin-bottom: .5rem; }
[data-role="urgent-help"] { padding: 2.3rem 2.5rem; border-left: 7px solid #4a4a4a; background: #eeeeee; border-radius: 0 12px 12px 0; }
[data-role="urgent-help"] p { max-width: 70ch; }
[data-role="urgent-help"] p:last-child { color: var(--quiet); font-size: .95rem; }
[data-role="site-footer"] { display: flex; justify-content: space-between; gap: 3rem; padding-block: 2.5rem 3rem; font-size: .95rem; }
[data-role="site-footer"] > p { max-width: 53ch; }
[data-role="site-footer"] nav { flex: 0 0 auto; display: flex; flex-direction: column; align-items: flex-start; }
[data-role="site-footer"] a { display: inline-flex; gap: .8rem; align-items: center; min-height: 48px; padding: .45rem 0; }
[data-kind="missing"] { min-height: 530px; }

@media (max-width: 1000px) {
  [data-role="opening"] { gap: 2rem; }
  [data-role="short-answer"], [data-role="depth"] { grid-template-columns: 150px minmax(0, 1fr); gap: 1.6rem; padding-inline: 1.8rem; }
  [data-role="question-tabs"] a { padding-inline: .9rem; }
}

@media (max-width: 720px) {
  :root { font-size: 18px; }
  h1 { font-size: 2.55rem; letter-spacing: -.04em; }
  h2, [data-role="chapter-subheading"] { font-size: 1.8rem; }
  [data-role="site-header"], [data-role="site-footer"], [data-role="opening"], [data-role="chapter-opening"], [data-role="short-answer"], [data-role="depth"], [data-role="glossary"], [data-role="source-drawer"], [data-role="next-chapter"], [data-role="urgent-help"] { width: calc(100% - 2rem); }
  [data-role="masthead-row"] { min-height: 105px; gap: 1rem; padding-block: 1.2rem; }
  [data-role="masthead"] { font-size: 1.3rem; gap: .75rem; }
  [data-role="header-note"] { display: none; }
  [data-role="question-tabs"] { grid-template-columns: 1fr 1fr; gap: .4rem; padding-bottom: .5rem; }
  [data-role="question-tabs"] a { border-radius: 10px; min-height: 76px; padding: .65rem .85rem; font-size: 1rem; }
  [data-role="tab-step"] { font-size: .9rem; }
  [data-role="opening"] { grid-template-columns: 1fr; gap: 2.2rem; padding-block: 2.6rem 3rem; }
  [data-role="chapter-line"] { margin-bottom: 1.2rem; }
  [data-role="lead"] { font-size: 1.12rem; }
  [data-role="primary-link"] { margin-top: 1.4rem; padding-inline: 1rem; gap: 1rem; font-size: 1rem; }
  [data-role="still-life"] { width: min(82%, 330px); margin-inline: auto; }
  [data-role="short-answer"], [data-role="depth"] { grid-template-columns: 1fr; gap: 1rem; }
  [data-role="short-answer"] { padding: 1.6rem 1.2rem; }
  [data-role="depth"] { padding: 3rem .2rem; }
  [data-role="margin-note"], [data-role="section-note"] { padding: 0; }
  [data-role="chapter-opening"] { padding: 2.5rem .2rem 2.8rem; }
  [data-role="chapter-opening"] h1 { max-width: 20ch; }
  [data-role="glossary"] { padding: 1.6rem 1.2rem; }
  [data-role="word-list"] { grid-template-columns: 1fr; }
  [data-role="filter-row"] { gap: .5rem; }
  [data-role="clear-filter"] { padding-inline: .7rem; }
  [data-role="source-drawer"] { margin-top: 2.8rem; }
  [data-role="source-drawer"] summary { padding-inline: .4rem; gap: .8rem; }
  [data-role="drawer-body"] { padding-inline: .4rem; }
  [data-role="drawer-body"] a { padding-block: .8rem; }
  [data-role="next-chapter"] { padding: 1.4rem 1.2rem; font-size: 1.25rem; }
  [data-role="urgent-help"] { padding: 1.6rem 1.1rem; border-left-width: 5px; }
  [data-role="site-footer"] { flex-direction: column; gap: 1.3rem; padding-block: 2rem; }
  main { padding-bottom: 2.8rem; }
  [data-kind="missing"] { min-height: 420px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  :root { font-size: 12pt; background: #fff; }
  [data-role="question-tabs"], [data-role="header-note"], [data-role="primary-link"], [data-role="next-chapter"], [data-role="filter-controls"], [data-role="site-footer"] nav { display: none; }
  [data-role="site-header"], [data-role="site-footer"], main > *, [data-role="chapter-group"] > * { width: 100%; }
  [data-role="opening"] { display: block; padding-block: 1rem 2rem; }
  [data-role="still-life"] { display: none; }
  [data-role="depth"], [data-role="short-answer"] { grid-template-columns: 1fr; gap: .6rem; padding: 1.5rem 0; }
  [data-role="chapter-opening"] { padding: 1rem 0 2rem; }
  h1 { font-size: 30pt; }
  h2, [data-role="chapter-subheading"] { font-size: 21pt; }
}

/* Outline levels retain the original definition-label typography. */
[data-role="note-title"] { margin: 0; font-weight: 400; text-wrap: wrap; }