/* Microscopy Practice: a microscope bench. Cool grey-green page, methylene-blue accent, geometric headings, eyepiece
   circles with a dark surround, stained cells (eosin outlines, haematoxylin nuclei) on screen and black on white on paper. */
:root {
  --bg: #eef0ee;
  --paper: #ffffff;
  --ink: #18201d;
  --muted: #4a534f;
  --line: #d2d8d4;
  --edge: #87918c;
  --accent: #1e5d8a;
  --accent-ink: #ffffff;
  --accent-soft: #e2edf5;
  --info: #1e5d8a;
  --ok: #17663a;
  --ok-soft: #dff1e6;
  --close: #7a5300;
  --close-soft: #f7ecd4;
  --bad: #a2261f;
  --bad-soft: #f8e1de;
  --focus: #b4540f;
  --head: Futura, "Century Gothic", "Avenir Next", "Trebuchet MS", system-ui, sans-serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
  --r: 3px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121514;
    --paper: #1b201e;
    --ink: #e4e9e6;
    --muted: #a8b2ad;
    --line: #2d3532;
    --edge: #5d6863;
    --accent: #7fbde8;
    --accent-ink: #0b1d2a;
    --accent-soft: #16293a;
    --info: #7fbde8;
    --ok: #8adca6;
    --ok-soft: #142c1e;
    --close: #f0c56b;
    --close-soft: #352a12;
    --bad: #ff9c8f;
    --bad-soft: #3a1c18;
    --focus: #f5a25d;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 var(--sans); }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); text-underline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--paper); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

/* hero: an eyepiece ring beside the title */
.hero { position: relative; padding: 20px 0 2px 64px; max-width: 860px; margin-top: 8px; }
.hero::before { content: ""; position: absolute; left: 0; top: 24px; width: 46px; height: 46px; border-radius: 50%; border: 7px solid var(--ink); background: radial-gradient(circle, var(--paper) 0 52%, var(--accent-soft) 53% 100%); box-shadow: inset 0 0 0 1px var(--edge); }
.hero::after { content: ""; position: absolute; left: 13px; top: 46px; width: 34px; border-top: 2px solid var(--accent); }
h1 { font: 700 clamp(1.75rem, 5vw, 2.6rem)/1.08 var(--head); margin: 0 0 8px; letter-spacing: -0.01em; }
.lede { margin: 0 0 4px; color: var(--muted); max-width: 66ch; }
h2 { font: 700 1.35rem/1.2 var(--head); margin: 0 0 10px; }

.tool { display: flex; flex-direction: column; }
.setup { order: 1; margin: 14px 0 4px; }
.work-area { order: 2; min-width: 0; }
.ranges { order: 3; }
@media (min-width: 1020px) {
  .tool { display: grid; grid-template-columns: minmax(0, 1fr) 330px; column-gap: 40px; align-items: start; }
  .setup { grid-column: 1; grid-row: 1; display: flex; flex-wrap: wrap; align-items: flex-end; gap: 4px 24px; margin-top: 18px; }
  .setup .levels { flex: 1 1 100%; max-width: 560px; }
  .setup .topics { flex: 1 1 100%; }
  .setup .check { margin: 0; }
  .ranges { grid-column: 2; grid-row: 1; margin-top: 18px; }
  .work-area { grid-column: 1 / -1; grid-row: 2; }
}
fieldset { border: 0; padding: 0; margin: 0 0 10px; min-width: 0; }
legend { font-weight: 700; padding: 0; margin-bottom: 6px; }
.toggles { display: flex; flex-wrap: wrap; gap: 6px; }
@media (min-width: 1020px) { .toggles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; } }
.tg { position: relative; display: block; cursor: pointer; }
.tg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.tg span { display: flex; flex-direction: column; justify-content: center; min-height: 44px; padding: 5px 12px 5px 32px; border: 1px solid var(--line); border-radius: var(--r); background: var(--paper); color: var(--muted); line-height: 1.2; }
.tg span::before { content: ""; position: absolute; left: 10px; top: 50%; width: 14px; height: 14px; margin-top: -8px; border: 2px solid var(--edge); border-radius: 2px; }
.tg b { font-size: 0.95rem; font-weight: 600; }
.tg small { display: none; color: var(--muted); font-size: 0.84rem; }
@media (min-width: 1200px) { .tg small { display: block; } }
.tg input:checked + span { color: var(--ink); border-color: var(--edge); }
.tg input:checked + span::before { border-color: var(--accent); background: var(--accent); }
.tg input:checked + span::after { content: ""; position: absolute; left: 15px; top: 50%; width: 4px; height: 8px; margin-top: -7px; border: solid var(--accent-ink); border-width: 0 2px 2px 0; transform: rotate(45deg); }
@media (min-width: 1200px) { .tg:has(small) span::before { top: 9px; margin-top: 0; } .tg:has(small) input:checked + span::after { top: 10px; margin-top: 0; } }
.tg input:focus-visible + span, .sg input:focus-visible + span, .check input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.seg { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--edge); border-radius: var(--r); overflow: hidden; }
.sg { position: relative; display: block; cursor: pointer; }
.sg + .sg { border-left: 1px solid var(--edge); }
.sg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.sg .nw, .nw { white-space: nowrap; }
.sg > span { display: flex; align-items: center; justify-content: center; min-height: 44px; padding: 4px 6px; text-align: center; font-size: 0.92rem; font-weight: 600; background: var(--paper); line-height: 1.15; }
.sg input:checked + span { background: var(--accent); color: var(--accent-ink); }
.check { position: relative; display: flex; align-items: center; gap: 10px; min-height: 44px; margin: 0 0 8px; cursor: pointer; font-size: 0.95rem; }
.check input { width: 20px; height: 20px; min-height: 0; margin: 0; accent-color: var(--accent); flex: none; }
.setrow { display: flex; align-items: center; gap: 8px 14px; flex-wrap: wrap; }
label.inline { display: flex; align-items: center; gap: 8px; font-weight: 600; }
select, input { font: inherit; font-size: 16px; color: var(--ink); background: var(--paper); border: 1px solid var(--edge); border-radius: var(--r); min-height: 44px; padding: 6px 10px; }
select { max-width: 100%; }
.btn { font: inherit; font-weight: 650; min-height: 44px; padding: 8px 16px; border-radius: var(--r); border: 1px solid var(--ink); background: var(--paper); color: var(--ink); cursor: pointer; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.small { padding: 6px 14px; }
.btn:hover { filter: brightness(0.95); }
.link { font: inherit; background: none; border: 0; padding: 10px 0; min-height: 44px; color: var(--accent); text-decoration: underline; text-underline-offset: 2px; cursor: pointer; }

.ranges { margin: 18px 0 6px; padding: 10px 14px 6px; border-left: 4px solid var(--accent); background: var(--paper); font-size: 0.95rem; max-width: 520px; }
.ranges h2 { font-size: 1.1rem; margin: 0 0 6px; }
.ranges table { border-collapse: collapse; width: 100%; }
.ranges th, .ranges td { text-align: left; padding: 4px 8px 4px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.ranges th { font-weight: 600; white-space: nowrap; }
.ranges p { margin: 8px 0 4px; color: var(--muted); }

.note { margin: 12px 0; padding: 10px 12px; border-left: 5px solid var(--close); background: var(--close-soft); }
.note.info { border-left-color: var(--info); background: var(--paper); }
.note .link { min-height: 0; padding: 0; font-weight: 600; }

/* the sheet */
.sheet { margin: 12px 0 0; }
.sheet:focus { outline: none; }
.sheet-head { display: flex; justify-content: space-between; align-items: baseline; gap: 4px 12px; flex-wrap: wrap; border-bottom: 3px solid var(--ink); padding-bottom: 4px; }
.sheet-head h2 { margin: 0; font-size: 1.25rem; }
.code { font-family: var(--mono); letter-spacing: 0.08em; color: var(--accent); }
.score { margin: 0; font-size: 0.95rem; color: var(--muted); }
.practice { margin: 6px 0 0; font-size: 0.93rem; color: var(--muted); }
.qs { list-style: none; margin: 0; padding: 0; }
.q { border-bottom: 1px solid var(--line); padding: 20px 0 10px; }
.q h3 { font: 700 1.15rem/1.25 var(--head); margin: 0 0 4px; }
.q h3 .qn { color: var(--accent); margin-right: 6px; }
.q .scen { margin: 0 0 10px; max-width: 72ch; }

/* figures: each drawing sits in its own box; on phones "Zoom in" doubles it inside a sideways scroller */
.fig { position: relative; margin: 0 0 14px; max-width: 760px; }
.fig figcaption { font-size: 0.9rem; color: var(--muted); margin-top: 4px; }
.figview { overflow: hidden; }
.figview svg { display: block; width: 100%; height: auto; }
.fig .zoom { display: none; margin: 0 0 6px; }
@media (max-width: 899px) {
  .fig .zoom { display: inline-flex; }
  .qs.zoomed .figview { overflow-x: auto; overscroll-behavior-x: contain; border: 1px solid var(--line); }
  .qs.zoomed .figview > * { width: 250%; max-width: none; }
}
.prt { display: none; }
.gpair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.gpair figure { margin: 0; min-width: 0; }
.gpair figcaption { text-align: center; }
@media (max-width: 560px) { .gpair { grid-template-columns: 1fr; } .qs.zoomed .gpair { grid-template-columns: 1fr 1fr; } }
.gfig { max-width: 1000px; }
.ffig { max-width: 820px; }

/* micrographs */
.mic .mic-bg { fill: #f8f4ec; stroke: #9aa29e; stroke-width: 0.3; }
.mic.em .mic-bg { fill: #cfd2cf; }
.mic .sp-out { fill: #f3dce7; stroke: #9b3a6c; stroke-width: 0.55; }
.mic .sp-wall { fill: none; stroke: #9b3a6c; stroke-width: 0.35; }
.mic .sp-vac { fill: #fbf2f6; stroke: #c78aa9; stroke-width: 0.25; }
.mic .sp-chl { fill: #5f9a52; stroke: #3d6b33; stroke-width: 0.2; }
.mic .sp-nuc { fill: #5865a8; stroke: #333d78; stroke-width: 0.3; }
.mic .sp-org { fill: #c779a2; stroke: none; }
.mic .sp-dot { fill: #6f5a66; }
.mic .sp-dna, .mic .sp-core { fill: none; stroke: #333d78; stroke-width: 0.5; }
.mic .sp-crist { fill: none; stroke: #9b3a6c; stroke-width: 0.45; }
.mic .sp-spike { fill: none; stroke: #9b3a6c; stroke-width: 0.55; }
.mic.em .sp-out { fill: #a9ada9; stroke: #232624; stroke-width: 0.6; }
.mic.em .sp-wall, .mic.em .sp-crist, .mic.em .sp-spike { stroke: #232624; }
.mic.em .sp-org, .mic.em .sp-dot { fill: #3d413e; }
.mic.em .sp-dna, .mic.em .sp-core { stroke: #232624; }
.mic .xy { stroke: #111; stroke-width: 0.35; }
.mic .xy-end { stroke: #111; stroke-width: 0.35; }
.mic .xyl { font: 700 3.6px var(--sans); fill: #111; }
.mic .sbar { fill: #111; }
.mic .sbl { font: 600 3.3px var(--sans); fill: #111; text-anchor: middle; paint-order: stroke; stroke: #f8f4ec; stroke-width: 1.2px; }
.mic.em .sbl { stroke: #cfd2cf; }
.mic .guide { fill: none; stroke: #4a534f; stroke-width: 0.2; stroke-dasharray: 0.6 0.8; }
.mic .ruler { fill: #fffdf5; stroke: #6d6a5c; stroke-width: 0.3; }
.mic .rt { fill: none; stroke: #111; stroke-width: 0.18; }
.mic .rn, .mic .ru { font: 2.7px var(--sans); fill: #111; text-anchor: middle; }
.mic .ru { text-anchor: start; }
.rd { font: 600 3.2px var(--sans); fill: #0d3f63; }
.mic .rd { font-size: 3px; }

/* eyepiece views */
.view .field, .fovs .field { fill: #fbfbf4; }
.view .field-edge, .fovs .field-edge { fill: none; stroke: #18201d; stroke-width: 2.4; }
.fovs .ft { stroke-linecap: butt; }
.view .gbase { stroke: #111; stroke-width: 0.25; }
.view .gt { stroke: #111; stroke-width: 0.22; }
.view .gn { font: 600 3.4px var(--sans); fill: #111; text-anchor: middle; }
.view .micro { fill: #e9e4d2; }
.view .mbase { stroke: #5a3b12; stroke-width: 0.35; }
.view .mt { stroke: #5a3b12; stroke-width: 0.42; }
.view .cell { fill: #f3dce7; stroke: #9b3a6c; stroke-width: 0.45; }
.view .cellw { fill: none; stroke: #9b3a6c; stroke-width: 0.25; }
.view .cnuc { fill: #5865a8; stroke: #333d78; stroke-width: 0.25; }
.view .rd { font-size: 3.3px; }
.fovs .rd { font-size: 4.6px; }
.fovs .fruler { fill: #fffdf0; stroke: #6d6a5c; stroke-width: 0.3; }
.fovs .ft { stroke: #111; stroke-width: 0.45; }
.fovs .fh { stroke: #111; stroke-width: 0.3; }
.fovs .fn { font: 600 4.4px var(--sans); fill: #111; }
.fovs .fc { fill: #f3dce7; stroke: #9b3a6c; stroke-width: 0.5; }
.fovs .fc2 { fill: #f6e8ee; stroke: #c78aa9; stroke-width: 0.35; }
.fovs .fcn { fill: #5865a8; }
.fovs .fl { font: 600 4.8px var(--sans); fill: var(--ink); text-anchor: middle; }
.fovs .rdw { paint-order: stroke; stroke: #fbfbf4; stroke-width: 1.2; }

/* questions */
.qparts { max-width: 760px; }
.part { margin: 0 0 14px; min-width: 0; }
.part > .prompt { display: block; font-weight: 600; margin: 0 0 6px; }
.ain { display: inline-flex; align-items: center; gap: 6px; max-width: 100%; }
.ain input { width: 8.5em; font-family: var(--mono); }
.ain input.wide { width: 12em; max-width: 100%; }
.ain .unit { color: var(--muted); }
.ain .unit.pre { font-weight: 700; color: var(--ink); }
.qfoot { display: flex; align-items: center; gap: 4px 16px; flex-wrap: wrap; }
.fbwrap:empty { display: none; }
.fb { margin: 6px 0 0; padding: 6px 10px; border-radius: var(--r); max-width: 70ch; }
.fb.right { background: var(--ok-soft); color: var(--ok); }
.fb.close { background: var(--close-soft); color: var(--close); }
.fb.wrong, .fb.unread { background: var(--bad-soft); color: var(--bad); }
.part.is-right .ain input { border-color: var(--ok); box-shadow: inset 0 0 0 1px var(--ok); }
.part.is-wrong .ain input { border-color: var(--bad); box-shadow: inset 0 0 0 1px var(--bad); }
.part.is-close .ain input { border-color: var(--close); box-shadow: inset 0 0 0 1px var(--close); }
.work { margin-top: 4px; }
.work > summary { cursor: pointer; color: var(--muted); font-size: 0.93rem; padding: 10px 0; min-height: 44px; display: flex; align-items: center; list-style: none; }
.work > summary::-webkit-details-marker { display: none; }
.work > summary::before { content: "+"; margin-right: 6px; font-weight: 700; font-family: var(--mono); }
.work[open] > summary::before { content: "−"; }
.work .ans { margin: 0 0 2px; }
.acc { font-weight: 400; color: var(--muted); font-size: 0.92em; }
.steps { margin: 2px 0 10px; padding-left: 1.4em; font-size: 0.94rem; overflow-wrap: anywhere; }
.sheet-foot { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; padding: 12px 0; }

.share { margin: 10px 0 8px; }
.print-row { display: flex; align-items: flex-end; gap: 8px 10px; flex-wrap: wrap; }
.print-row label, .share-out label { display: flex; flex-direction: column; gap: 3px; font-size: 0.9rem; font-weight: 600; }
.share-out input { width: 100%; }
.recent { margin-top: 12px; border-top: 1px solid var(--line); }
.recent summary { cursor: pointer; padding: 11px 0; font-weight: 600; min-height: 44px; }
.recent ul { list-style: none; margin: 0; padding: 0; }
.recent li { display: flex; justify-content: space-between; align-items: center; gap: 10px; border-top: 1px solid var(--line); padding: 4px 0; }
.recent small { display: block; color: var(--muted); }
.hint { color: var(--muted); font-size: 0.9rem; margin: 8px 0 10px; }

.toast { position: fixed; left: 50%; bottom: 16px; transform: translate(-50%, 160%); background: var(--ink); color: var(--bg); padding: 10px 14px; border-radius: var(--r); max-width: calc(100% - 32px); transition: transform 0.2s; z-index: 20; }
.toast.on { transform: translate(-50%, 0); }
@media (prefers-reduced-motion: reduce) { .toast { transition: none; } }

.content { padding: 22px 0 8px; max-width: 820px; }
.content h2 { margin-top: 30px; }
.content p { max-width: 68ch; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 11px 0; font-weight: 600; min-height: 44px; }
.faq details p { margin: 0 0 12px; }
.sources { font-size: 0.92rem; color: var(--muted); overflow-wrap: anywhere; margin-top: 22px; }

footer { border-top: 1px solid var(--line); margin-top: 20px; padding: 16px 0 28px; color: var(--muted); font-size: 0.92rem; }
.indep { margin: 0 0 10px; }
.sb-footer p { margin: 6px 0; }
.sb-more { line-height: 1.8; }
.sb-footer a { color: var(--ink); }
a.btn { display: inline-flex; align-items: center; text-decoration: none; }

@media (max-width: 600px) {
  .hero { padding-top: 6px; padding-left: 52px; }
  .hero::before { top: 10px; width: 38px; height: 38px; border-width: 6px; }
  .hero::after { left: 10px; top: 28px; width: 28px; }
  .toggles { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 5px; }
  .tg .long { display: none; }
  .tg span { padding: 5px 2px; text-align: center; align-items: center; font-size: 0.86rem; }
  .tg span::before, .tg input:checked + span::after { display: none; }
  .tg input:checked + span { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  .sg > span { font-size: 0.86rem; padding: 4px 3px; }
}
.tg .short { display: none; }
@media (max-width: 600px) { .tg .short { display: block; } }

/* print: worksheet and key only; drawings in black on white; micrographs life size */
.print-root { display: none; }
@page { margin: 0.45in 0.5in; }
@media print {
  :root { --ink: #000; --muted: #333; --line: #999; --paper: #fff; --edge: #555; }
  body { background: #fff; color: #000; font: 10.5pt/1.38 var(--sans); }
  main, footer, .toast, .skip { display: none !important; }
  .print-root { display: block; }
  svg { print-color-adjust: exact; -webkit-print-color-adjust: exact; }
  table.pt { width: 100%; border-collapse: collapse; }
  table.pt > tbody > tr > td, table.pt > thead > tr > td { padding: 0; }
  .prun { font: 8.5pt var(--sans); color: #444; text-align: right; padding-bottom: 6pt !important; }
  .ph { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 2pt solid #000; margin-bottom: 6pt; }
  .ph h2 { font: 700 15pt var(--head); margin: 0; }
  .ph p { margin: 0; }
  .pmeta { display: flex; justify-content: space-between; gap: 12pt; margin: 4pt 0 6pt; }
  .plabel { margin: 0 0 6pt; font-size: 9pt; font-style: italic; }
  .pq { list-style: none; margin: 0; padding: 0; }
  .pq > li { padding: 6pt 0 4pt; border-bottom: 0.75pt solid #999; break-inside: avoid; page-break-inside: avoid; }
  .pqh { break-after: avoid; page-break-after: avoid; }
  .pq h3 { font: 700 11.5pt var(--head); margin: 0 0 2pt; }
  .pq .pscen { margin: 0 0 4pt; }
  .pq .fig { margin: 0 0 5pt; max-width: none; break-inside: avoid; }
  .pq .fig .zoom, .scr { display: none !important; }
  .prt { display: inline; }
  .pq .fig figcaption { font-size: 8.5pt; color: #000; margin-top: 1pt; }
  .pq .figview { overflow: visible; }
  .pq .bfig svg { width: 156mm; height: 76mm; }
  .pq .gpair { display: flex; gap: 4mm; }
  .pq .gpair figure { width: 90mm; }
  .pq .gpair svg { width: 90mm; height: 50.4mm; }
  .pq .ffig svg { width: 112mm; height: 58.24mm; }
  .mic .mic-bg { fill: #fff; stroke: #000; stroke-width: 0.3; }
  .mic.em .mic-bg { fill: #fff; }
  .mic .sp-out, .mic.em .sp-out { fill: #fff; stroke: #000; stroke-width: 0.45; }
  .mic .sp-wall, .mic .sp-vac, .mic .sp-crist, .mic .sp-spike, .mic .sp-dna, .mic .sp-core { stroke: #000; fill: none; }
  .mic .sp-chl, .mic .sp-nuc, .mic .sp-org, .mic .sp-dot { fill: #bdbdbd; stroke: #000; stroke-width: 0.2; }
  .mic .sp-dot { stroke: none; fill: #555; }
  .mic .ruler { fill: #fff; stroke: #000; }
  .mic .sbl, .mic.em .sbl { stroke: #fff; }
  .mic .guide { stroke: #555; }
  .rd { fill: #000; }
  .view .field, .fovs .field { fill: #fff; }
  .view .field-edge, .fovs .field-edge { stroke: #000; stroke-width: 1.2; }
  .view .micro { fill: #fff; }
  .view .mbase, .view .mt { stroke: #000; }
  .view .mt { stroke-width: 0.5; }
  .view .cell, .fovs .fc { fill: #fff; stroke: #000; }
  .view .cellw { stroke: #000; }
  .view .cnuc, .fovs .fcn { fill: #bdbdbd; stroke: #000; stroke-width: 0.2; }
  .fovs .fc2 { fill: #fff; stroke: #888; }
  .fovs .fruler { fill: #fff; stroke: #000; }
  .fovs .fl { fill: #000; }
  .pparts { columns: 2; column-gap: 8mm; }
  .pq > li.pq-fov { display: flex; flex-wrap: wrap; gap: 0 6mm; align-items: flex-start; }
  .pq > li.pq-fov .pqh { flex: 0 0 100%; }
  .pq > li.pq-fov .fig { flex: 0 0 112mm; }
  .pq > li.pq-fov .pparts { flex: 1 1 0; min-width: 0; columns: 1; }
  .pq > li.pq-fov .pparts .pp { margin-bottom: 4pt; }
  .pparts .pp { margin: 0 0 7pt; break-inside: avoid; page-break-inside: avoid; }
  .pparts .pp p { margin: 0 0 3pt; }
  .pparts .pline { margin-top: 8pt !important; }
  .pkey { break-before: page; page-break-before: always; }
  .pk { margin: 0; padding-left: 18pt; }
  .pk > li { padding: 4pt 0 5pt; border-bottom: 0.75pt solid #bbb; break-inside: avoid; page-break-inside: avoid; } /* a key never starts a page with an unnamed part */
  .pk .pkp { break-inside: avoid; page-break-inside: avoid; }
  .pk h3 { font: 700 10.5pt var(--head); margin: 0; break-after: avoid; page-break-after: avoid; }
  .pk p { margin: 1pt 0 0; }
  .pk .pka { font-weight: 700; }
  .pk .pka .acc { font-weight: 400; color: #333; }
  .pk ul { margin: 1pt 0 0; padding-left: 13pt; font-size: 9pt; line-height: 1.35; }
}