/* lesson-kit.css — shared styles for PCD study chapters. BARO Editorial adaptation (see baro-site/DESIGN.md): warm paper, cobalt ink, vermilion indexing, hairline rules, 0-4px radii, no soft shadows. Adapt choice: serif body (Charter/Georgia) for long-form reading; mono for metadata, labels and code. Display: condensed uppercase (Archivo/Arial Narrow). Link from a page with: and put class="lk" on . Component classes are prefixed lk-; callouts use .callout. */ :root{ --lk-display:'Archivo Narrow','Arial Narrow','Helvetica Neue',sans-serif; --lk-font:'Charter','Bitstream Charter',Georgia,'Times New Roman',serif; --lk-utility:'Inter','Helvetica Neue',system-ui,sans-serif; --lk-mono:'IBM Plex Mono',ui-monospace,SFMono-Regular,Consolas,monospace; --lk-paper:#F3EFE3; --lk-paper-light:#FAF7EF; --lk-ink:#171813; --lk-ink-soft:#45463F; --lk-cobalt:#1546B8; --lk-cobalt-dark:#10368E; --lk-vermilion:#B83D2D; --lk-forest:#1F5A49; --lk-rule:#6E7068; --lk-rule-soft:#C9C3B6; /* legacy aliases kept for widget markup written against the old kit */ --lk-ac:var(--lk-cobalt); --lk-ac2:var(--lk-vermilion); --lk-text:var(--lk-ink); --lk-muted:var(--lk-ink-soft); --lk-bd:var(--lk-rule-soft); --lk-bg:var(--lk-paper); --lk-soft:var(--lk-paper-light); --lk-code:var(--lk-paper-light); --lk-ok:var(--lk-forest); --lk-okbg:#E9EFE7; --lk-warn:var(--lk-vermilion); --lk-warnbg:#F5E6E1; --lk-exam:var(--lk-vermilion); --lk-note:var(--lk-forest); --lk-hl:#E3E8F4; --lk-shadow:none; } /* base / reading column */ body.lk{font-family:var(--lk-font);color:var(--lk-ink);line-height:1.7; max-width:46rem;margin:0 auto;padding:2.5rem 1.25rem 6rem;background:var(--lk-paper); -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility} body.lk h1,body.lk h2,body.lk h3,body.lk h4{line-height:1.15;letter-spacing:.01em} body.lk h1{font-family:var(--lk-display);text-transform:uppercase;font-weight:700; font-size:clamp(2.1rem,6vw,3rem);line-height:.95;margin:.1em 0 .35em;color:var(--lk-cobalt)} body.lk h2{font-family:var(--lk-display);text-transform:uppercase;font-weight:600; font-size:1.45rem;margin:2.8rem 0 .7rem;padding-bottom:.35rem;border-bottom:1px solid var(--lk-rule)} body.lk h2::before{content:"";display:inline-block;width:.45rem;height:1rem;margin-right:.55rem; vertical-align:-1px;background:var(--lk-vermilion)} body.lk h3{font-size:1.13rem;margin:1.6rem 0 .4rem;font-weight:700} body.lk h4{font-size:1rem;margin:1.2rem 0 .3rem;font-weight:700} body.lk p,body.lk li{font-size:1.05rem} body.lk a{color:var(--lk-cobalt);text-underline-offset:2px} body.lk a:focus-visible{outline:2px solid var(--lk-cobalt);outline-offset:3px} body.lk strong{font-weight:700} body.lk code{background:var(--lk-paper-light);border:1px solid var(--lk-rule-soft); padding:.08em .34em;border-radius:3px;font-size:.85em;font-family:var(--lk-mono)} body.lk var{font-style:normal;font-weight:600;color:var(--lk-cobalt-dark);font-family:var(--lk-mono)} /* header / meta / footer */ .lk-header{margin-bottom:1.75rem;padding-bottom:1.1rem;border-bottom:1px solid var(--lk-rule)} .lk-kicker{font-family:var(--lk-utility);font-size:.72rem;font-weight:600;letter-spacing:.14em; text-transform:uppercase;color:var(--lk-vermilion)} .lk-meta{color:var(--lk-ink-soft);font-family:var(--lk-mono);font-size:.8rem; display:flex;gap:1.1rem;flex-wrap:wrap;margin-top:.5rem} .lk-meta a{color:var(--lk-ink-soft)} .lk-foot{margin-top:4.5rem;padding-top:1.5rem;border-top:1px solid var(--lk-rule); font-family:var(--lk-mono);font-size:.78rem;color:var(--lk-ink-soft)} .lk-foot a{color:var(--lk-cobalt)} /* chapter prev/index/next nav */ .lk-chnav{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap; font-family:var(--lk-mono);font-size:.82rem;margin:1.2rem 0} .lk-chnav a{text-decoration:none;border-bottom:1px solid var(--lk-rule-soft);padding-bottom:1px} .lk-chnav a:hover{border-color:var(--lk-cobalt)} /* "in this chapter" overview */ .lk-overview{background:var(--lk-paper-light);border:1px solid var(--lk-rule-soft); border-radius:3px;padding:1rem 1.25rem;margin:1.5rem 0} .lk-overview h2{border:0;margin:.1rem 0 .5rem;font-size:1.05rem} .lk-overview h2::before{display:none} .lk-overview ul{margin:.3rem 0;padding-left:1.2rem} /* table of contents */ .lk-toc{background:var(--lk-paper-light);border:1px solid var(--lk-rule-soft);border-radius:3px; padding:1rem 1.3rem;margin:1.5rem 0} .lk-toc h3{margin:.1rem 0 .5rem;font-family:var(--lk-utility);text-transform:uppercase; font-size:.78rem;letter-spacing:.1em;color:var(--lk-ink-soft)} .lk-toc ol{margin:0;padding-left:1.4rem;columns:2;column-gap:2rem} .lk-toc li{margin:.15rem 0;font-size:.95rem} .lk-toc li::marker{color:var(--lk-vermilion);font-family:var(--lk-mono);font-size:.85em} .lk-toc a{text-decoration:none} .lk-toc a:hover{text-decoration:underline} /* figures — archival technical plates (inline SVG, cobalt line work + sparse vermilion) */ .lk-fig{margin:2rem 0;text-align:center} .lk-fig svg{max-width:100%;height:auto} .lk-fig figcaption{font-family:var(--lk-mono);font-size:.78rem;color:var(--lk-ink-soft); margin-top:.6rem;text-align:left;border-top:1px solid var(--lk-rule-soft);padding-top:.45rem} .lk-fig figcaption b{color:var(--lk-vermilion);font-weight:600} /* callouts */ .callout{padding:.9rem 1.05rem;margin:1.4rem 0;border-radius:3px;background:var(--lk-paper-light); border:1px solid var(--lk-rule-soft);border-left:3px solid var(--lk-rule-soft)} .callout .callout-label{display:block;font-family:var(--lk-utility);font-weight:700; text-transform:uppercase;font-size:.7rem;letter-spacing:.09em;margin-bottom:.35rem} .callout p:last-child{margin-bottom:0} .callout.idea{border-left-color:var(--lk-cobalt)} .callout.idea .callout-label{color:var(--lk-cobalt)} .callout.warn{border-left-color:var(--lk-vermilion);background:var(--lk-warnbg)} .callout.warn .callout-label{color:var(--lk-vermilion)} .callout.exam{border-left-color:var(--lk-vermilion)} .callout.exam .callout-label{color:var(--lk-vermilion)} .callout.note{border-left-color:var(--lk-forest)} .callout.note .callout-label{color:var(--lk-forest)} /* tables */ .lk table,table.lk-table{width:100%;border-collapse:collapse;margin:1.4rem 0;font-size:.95rem} .lk th,.lk td{border:1px solid var(--lk-rule-soft);padding:.55rem .8rem;text-align:left;vertical-align:top} .lk th{background:var(--lk-paper-light);font-family:var(--lk-utility);font-size:.85rem; text-transform:uppercase;letter-spacing:.04em;font-weight:600} .lk tbody tr:nth-child(even){background:var(--lk-paper-light)} /* code blocks — paper-light surfaces, ink-toned syntax (no dark slabs on paper) */ .lk pre{background:var(--lk-paper-light);color:var(--lk-ink);border:1px solid var(--lk-rule-soft); border-radius:3px;padding:1rem 1.1rem;overflow-x:auto;margin:1.2rem 0;font-size:.85rem} .lk pre code{background:none;border:none;padding:0;font-family:var(--lk-mono);font-size:inherit} /* highlight.js: ink-based light palette overriding any linked hljs theme */ .lk pre code.hljs{background:transparent;color:var(--lk-ink);padding:0} .lk pre .hljs-comment,.lk pre .hljs-quote{color:var(--lk-ink-soft);font-style:italic} .lk pre .hljs-keyword,.lk pre .hljs-selector-tag,.lk pre .hljs-built_in,.lk pre .hljs-type,.lk pre .hljs-literal{color:var(--lk-cobalt);font-weight:600} .lk pre .hljs-string,.lk pre .hljs-regexp,.lk pre .hljs-addition,.lk pre .hljs-meta .hljs-string{color:var(--lk-forest)} .lk pre .hljs-number,.lk pre .hljs-symbol,.lk pre .hljs-attr,.lk pre .hljs-attribute,.lk pre .hljs-constant{color:var(--lk-vermilion)} .lk pre .hljs-title,.lk pre .hljs-title.function_,.lk pre .hljs-section,.lk pre .hljs-name,.lk pre .hljs-selector-id,.lk pre .hljs-selector-class{color:var(--lk-cobalt-dark);font-weight:600} .lk pre .hljs-variable,.lk pre .hljs-template-variable,.lk pre .hljs-params,.lk pre .hljs-property{color:var(--lk-ink)} .lk pre .hljs-meta,.lk pre .hljs-doctag{color:var(--lk-ink-soft)} .lk pre .hljs-deletion{color:var(--lk-vermilion)} .lk pre .hljs-emphasis{font-style:italic} .lk pre .hljs-strong{font-weight:600} /* details / collapsible & quiz */ .lk details{background:var(--lk-paper-light);border:1px solid var(--lk-rule-soft);border-radius:3px; padding:.8rem 1.05rem;margin:.8rem 0} .lk details summary{font-weight:700;cursor:pointer} .lk details summary:focus-visible{outline:2px solid var(--lk-cobalt);outline-offset:3px} .lk details[open] summary{margin-bottom:.5rem;color:var(--lk-cobalt)} .lk-quiz{display:flex;flex-direction:column;gap:.6rem} /* timeline */ .lk-timeline{list-style:none;margin:1.4rem 0;padding-left:1.3rem;border-left:1px solid var(--lk-rule)} .lk-timeline li{position:relative;margin:0 0 1.1rem;padding-left:1rem} .lk-timeline li::before{content:"";position:absolute;left:-1.62rem;top:.5rem;width:.6rem;height:.6rem; border-radius:50%;background:var(--lk-cobalt);box-shadow:0 0 0 3px var(--lk-paper)} .lk-timeline .lk-tl-when{font-weight:700;color:var(--lk-cobalt);font-family:var(--lk-mono);font-size:.9em} /* mermaid centering */ .lk .mermaid{margin:1.6rem 0;text-align:center} /* ---- tabs (data-kit="tabs") ---- */ .lk-tabs{margin:1.4rem 0} .lk-tabs .lk-tablist{display:flex;gap:.4rem;border-bottom:1px solid var(--lk-rule);flex-wrap:wrap} .lk-tabs .lk-tab{font-family:var(--lk-utility);font-size:.88rem;cursor:pointer;background:none; border:1px solid transparent;border-bottom:none;padding:.5rem .95rem;border-radius:3px 3px 0 0;color:var(--lk-ink-soft)} .lk-tabs .lk-tab:hover{background:var(--lk-paper-light)} .lk-tabs .lk-tab[aria-selected="true"]{color:var(--lk-cobalt);border-color:var(--lk-rule); background:var(--lk-paper-light);font-weight:600;position:relative;top:1px} .lk-tabs .lk-tab:focus-visible{outline:2px solid var(--lk-cobalt);outline-offset:2px} .lk-tabs .lk-tabpanel{border:1px solid var(--lk-rule);border-top:none;border-radius:0 0 3px 3px; padding:1rem 1.1rem;background:var(--lk-paper-light)} .lk-tabs .lk-tabpanel[hidden]{display:none} /* ---- annotated code ---- */ .lk-acode{border:1px solid var(--lk-rule);border-radius:3px;overflow:hidden;margin:1.2rem 0} .lk-acode .lk-ac-code{background:var(--lk-paper-light);padding:.6rem;margin:0;border:none} .lk-acode .lk-ac-line{display:block;width:100%;text-align:left;font:inherit;font-family:var(--lk-mono); font-size:.85rem;background:none;border:none;border-radius:2px;padding:.15rem .55rem;cursor:pointer; white-space:pre;color:var(--lk-ink)} .lk-acode .lk-ac-line:hover{background:var(--lk-hl)} .lk-acode .lk-ac-line[aria-pressed="true"]{background:var(--lk-hl);box-shadow:inset 3px 0 0 var(--lk-cobalt)} .lk-acode .lk-ac-line:focus-visible{outline:2px solid var(--lk-cobalt);outline-offset:-2px} .lk-acode .lk-ac-expl{padding:.75rem .95rem;border-top:1px solid var(--lk-rule-soft); background:var(--lk-paper);min-height:1.5em;font-size:.95rem} /* ---- state explorer ---- */ .lk-se{border:1px solid var(--lk-rule);border-radius:3px;padding:1.1rem;margin:1.4rem 0;background:var(--lk-paper-light)} .lk-se .lk-se-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:.6rem;margin-bottom:1rem} .lk-se .lk-se-node{font-family:var(--lk-mono);font-size:.85rem;font-weight:600;cursor:pointer; padding:.7rem .5rem;border:1px solid var(--lk-rule);border-radius:3px;background:var(--lk-paper-light); color:var(--lk-ink);text-align:center;transition:.14s} .lk-se .lk-se-node:hover{border-color:var(--lk-cobalt)} .lk-se .lk-se-node:focus-visible{outline:2px solid var(--lk-cobalt);outline-offset:2px} .lk-se .lk-se-node[aria-pressed="true"]{background:var(--lk-hl);border-color:var(--lk-cobalt)} .lk-se .lk-se-node.lk-se-current{box-shadow:0 0 0 2px var(--lk-cobalt) inset} .lk-se .lk-se-panel{border:1px solid var(--lk-rule-soft);border-radius:3px;padding:.9rem;background:var(--lk-paper)} .lk-se .lk-se-panel h4{margin:0 0 .3rem;color:var(--lk-cobalt)} .lk-se .lk-se-cur{font-family:var(--lk-mono);font-size:.8rem;color:var(--lk-ink-soft);margin-bottom:.6rem} .lk-se ul.lk-se-trans{list-style:none;padding:0;margin:.4rem 0 0;display:flex;flex-direction:column;gap:.35rem} .lk-se .lk-se-trans button{font:inherit;font-size:.95rem;cursor:pointer;text-align:left;width:100%; padding:.4rem .6rem;border:1px solid var(--lk-rule-soft);border-radius:3px;background:var(--lk-paper-light)} .lk-se .lk-se-trans button:hover{background:var(--lk-hl);border-color:var(--lk-cobalt)} .lk-se .lk-se-trans code{background:var(--lk-hl);border:none;padding:0 .25rem;border-radius:2px;color:var(--lk-cobalt-dark)} /* ---- step simulator ---- */ .lk-step{border:1px solid var(--lk-rule);border-radius:3px;padding:1.1rem;margin:1.4rem 0;background:var(--lk-paper-light)} .lk-step h4{margin:0 0 .25rem;color:var(--lk-cobalt-dark)} .lk-step .lk-step-sub{margin:0 0 .7rem;font-size:.9rem;color:var(--lk-ink-soft)} .lk-step .lk-step-cols{display:flex;gap:.6rem;flex-wrap:wrap} .lk-step .lk-step-th{flex:1;min-width:140px;border:1px solid var(--lk-rule-soft);border-radius:3px;padding:.5rem .65rem;background:var(--lk-paper)} .lk-step .lk-step-th h5{margin:0 0 .35rem;font-size:.9rem;font-family:var(--lk-utility)} .lk-step .lk-step-ins{list-style:none;margin:0;padding:0} .lk-step .lk-step-ins li{font:13px/1.7 var(--lk-mono);padding:.1rem .4rem;border-radius:2px;color:var(--lk-ink-soft)} .lk-step .lk-step-ins li.on{background:var(--lk-hl);color:var(--lk-cobalt-dark);font-weight:600} .lk-step .lk-step-ins li.done{color:var(--lk-rule);text-decoration:line-through} .lk-step .lk-step-ins li.blocked{background:var(--lk-warnbg);color:var(--lk-vermilion)} .lk-step .lk-step-state{display:flex;gap:.7rem;flex-wrap:wrap;align-items:center;margin:.7rem 0;font-size:.85rem} .lk-step .lk-step-box{border:1px solid var(--lk-rule-soft);border-radius:3px;padding:.35rem .65rem;background:var(--lk-paper)} .lk-step .lk-step-box b{font-family:var(--lk-mono)} .lk-step .lk-step-verdict{font-size:.9rem;padding:.45rem .7rem;border-radius:3px;margin:.5rem 0;background:var(--lk-paper);min-height:1.3em} .lk-step .lk-step-verdict.ok{background:var(--lk-okbg);color:var(--lk-forest)} .lk-step .lk-step-verdict.bad{background:var(--lk-warnbg);color:var(--lk-vermilion)} .lk-step .lk-step-btns{display:flex;gap:.4rem;flex-wrap:wrap;margin-top:.6rem} .lk-step .lk-step-btns button{font-family:var(--lk-utility);font-size:.85rem;font-weight:600;cursor:pointer; padding:.45rem .95rem;border-radius:3px;border:1px solid var(--lk-cobalt);background:var(--lk-cobalt);color:var(--lk-paper-light)} .lk-step .lk-step-btns button:hover{background:var(--lk-cobalt-dark)} .lk-step .lk-step-btns button:focus-visible{outline:2px solid var(--lk-cobalt);outline-offset:2px} .lk-step .lk-step-btns button.lk-step-reset{background:var(--lk-paper-light);color:var(--lk-ink-soft);border-color:var(--lk-rule)} .lk-step .lk-step-btns button:disabled{opacity:.4;cursor:not-allowed} @media (max-width:640px){ body.lk{padding:1.5rem .9rem 4rem} .lk-toc ol{columns:1} .lk-step .lk-step-cols{flex-direction:column} } @media (prefers-reduced-motion:reduce){ .lk *{transition:none!important} } @media print{ .lk-step-btns,.lk-se-grid,.lk-chnav{display:none} a{color:inherit} body.lk{max-width:none} }