/* Public learning library: domain navigation, readable list, and beginner lessons. */
.kr-article-library { max-width:960px; margin:auto; }
.kr-article-library .kr-header { padding:32px; border-bottom:1px solid var(--border); }
.kr-article-library h1 { font:600 clamp(28px,4vw,48px)/1.55 var(--font-head); letter-spacing:normal; }
.kr-article-library .kr-crumb { margin-bottom:24px; }
.kr-article-library .kr-lead { line-height:1.9; }
.kr-article-library .kr-actions { display:none; }
@media(max-width:700px) { .kr-article-library .kr-header { padding:16px 6px 24px; } }
.knowledge-page [hidden], .kl-lesson [hidden] { display:none !important; }
.knowledge-page { --kl-ink:#f0f3f8; --kl-muted:#b4bfd1; }
.kl-library-head { display:flex; align-items:baseline; gap:24px; margin-bottom:8px; }
.kl-library-head h1 { font:700 32px/1.5 var(--font-head); margin:0; }
.kl-library-head>p { color:var(--kl-muted); margin:0; font-size:15px; }
.knowledge-page .km-hero { padding:20px 0 24px; gap:24px; border-bottom:0; }
.kl-domain-title { font:600 26px/1.55 var(--font-head); margin:0 0 6px; }
.knowledge-page .km-lead { font-size:15px; color:var(--kl-muted); }
.knowledge-page .km-search input::placeholder { color:var(--kl-muted); }
.knowledge-page .km-guide-button { box-shadow:none; }
.kl-domains { display:flex; flex-wrap:wrap; gap:4px; padding:8px 0; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.kl-domains button { display:inline-flex; align-items:center; gap:8px; font:500 14px/1.6 var(--font-body); text-align:left; color:var(--kl-muted); background:transparent; border:1px solid transparent; border-radius:8px; padding:9px 13px; min-height:44px; cursor:pointer; transition:background .18s,color .18s; }
.kl-domains button>span { font-size:18px; }
.kl-domains button[aria-pressed=true] { color:var(--kl-ink); border-color:color-mix(in srgb,var(--domain) 42%,transparent); background:color-mix(in srgb,var(--domain) 12%,var(--bg)); }
.kl-domains button:hover { color:var(--kl-ink); background:var(--bg-card); }
@media(min-width:701px) { .kl-domains { position:sticky; top:64px; z-index:10; background:var(--bg); } }
.knowledge-page .km-map-toolbar { gap:16px; padding:12px 0 20px; align-items:start; }
.knowledge-page .km-map-toolbar>.km-filters { display:flex; justify-content:flex-start; flex:1; }
.knowledge-page .km-filter span { color:inherit; font-size:inherit; }
.knowledge-page .km-filter { color:var(--kl-muted); min-height:44px; font-size:13px; }
.kl-view-switch { display:flex; flex:none; gap:2px; padding:3px; border:1px solid var(--border); border-radius:8px; }
.kl-view-switch button { font:500 13px/1.6 var(--font-body); color:var(--kl-muted); background:transparent; border:0; border-radius:5px; padding:8px 12px; cursor:pointer; min-height:38px; }
.kl-view-switch button[aria-pressed=true] { color:var(--kl-ink); background:#253044; }
.kl-view-list .km-workspace { display:block; max-width:1160px; margin:0 auto; }
.kl-view-list :is(.km-graph-note,.km-inspector) { display:none; }
.kl-topic-list { min-width:0; padding:20px 0; }
.kl-list-heading { display:flex; justify-content:space-between; align-items:baseline; gap:16px; margin-bottom:20px; }
.kl-list-heading h2 { font:600 24px/1.6 var(--font-head); margin:0; color:var(--kl-ink); }
#kl-result-count { color:var(--kl-muted); font-size:14px; margin:0; }
.kl-start { display:flex; align-items:center; gap:16px; padding:18px 24px; margin-bottom:40px; border:1px solid #3f513e; border-radius:12px; background:#101d1b; text-decoration:none; color:var(--kl-ink); }
.kl-start-icon { font-size:28px; }
.kl-start>span:nth-child(2) { flex:1; }
.kl-start small { display:block; color:#b8cfbd; font-size:13px; line-height:1.8; }
.kl-start b { display:block; font:600 19px/1.65 var(--font-head); }
.kl-start:hover { background:#192b24; }
.kl-list-group { display:grid; grid-template-columns:200px minmax(0,1fr); gap:40px; margin-bottom:44px; }
.kl-list-group>header { padding-top:22px; }
.kl-group-icon { font-size:26px; }
.kl-list-group h3 { font:600 19px/1.65 var(--font-head); margin:10px 0 4px; color:var(--kl-ink); text-wrap:balance; }
.kl-group-count { color:var(--kl-muted); font-size:13px; }
.kl-list-item { border-bottom:1px solid #273142; }
.kl-list-item:first-child { border-top:1px solid #273142; }
.kl-row { display:flex; align-items:center; gap:18px; padding:20px 16px; border-radius:8px; color:var(--kl-ink); text-decoration:none; cursor:pointer; list-style:none; transition:background .18s; }
.kl-row::-webkit-details-marker { display:none; }
.kl-row:hover { background:#111d2e; }
.kl-row-icon { display:grid; place-items:center; width:48px; height:48px; flex-shrink:0; border-radius:10px; font-size:24px; background:color-mix(in srgb,var(--category-color) 10%,var(--bg)); }
.kl-row-copy { flex:1; min-width:0; }
.kl-row-meta { display:flex; align-items:center; flex-wrap:wrap; gap:8px; color:var(--kl-muted); font-size:12px; line-height:1.6; margin-bottom:5px; }
.kl-row-meta>span+span:before { content:'·'; margin-right:8px; }
.kl-row-copy b { display:block; font:600 19px/1.65 var(--font-head); }
.kl-row-summary { display:block; font-size:15px; line-height:1.85; color:var(--kl-muted); margin-top:4px; max-width:65ch; text-wrap:pretty; }
.kl-row-action { flex-shrink:0; font-size:13px; color:var(--kl-muted); white-space:nowrap; }
.kl-row-action i { font-style:normal; display:inline-block; margin-left:8px; color:var(--category-color); font-size:20px; }
.kl-inline-preview { padding:0 24px 24px 82px; max-width:75ch; line-height:1.85; }
.kl-inline-preview .km-lesson-preview { margin-top:0; }
.kl-summary-status { font-size:13px; color:var(--kl-muted); }
#kl-no-results { padding:28px 0; color:var(--kl-muted); }
.kl-memory-buttons button { font:inherit; color:#bdb8cd; background:#191621; border:1px solid #4b425c; border-radius:10px; padding:10px 16px; cursor:pointer; min-height:44px; }
.kl-memory-buttons button[aria-pressed=true] { color:#fff; border-color:#bba5df; background:#342943; }
.kl-related { margin-top:32px; display:flex; flex-wrap:wrap; gap:18px; border-top:1px solid #393042; padding:24px 0; }
.kl-related a { color:#c7adef; }
.kl-lesson { max-width:850px; margin:auto; padding:30px clamp(16px,4vw,44px) 60px; color:var(--text); font-size:17px; line-height:1.95; }
.kl-lesson h2 { font-size:24px; line-height:1.6; margin-bottom:14px; }
.kl-lesson h3 { font-size:19px; line-height:1.6; }
.kl-lesson section { margin:38px 0; }
.kl-lesson p { margin:12px 0; }
.kl-lesson a { color:#cbb0f1; text-underline-offset:4px; }
.kl-date { color:var(--text-muted); font-size:13px; }
.kl-dateline,.kl-small { color:var(--text-muted); font-size:13px; }
.kl-steps { list-style:none; padding:0; }
.kl-steps li { display:grid; grid-template-columns:32px 1fr; gap:14px; margin:22px 0; }
.kl-steps li>span { color:#cbb0f1; font-size:22px; }
.kl-steps li p { margin:0; }
.kl-glossary dl>div { display:contents; }
.kl-lab { padding:22px; border:1px solid #544063; border-radius:14px; background:#201828; }
.kl-lab label { display:block; margin-bottom:12px; }
.kl-lab select { width:100%; font:inherit; padding:12px; background:#30213f; color:#fff; border:1px solid #69577c; border-radius:8px; }
.kl-choice { display:flex; flex-wrap:wrap; gap:10px; }
.kl-choice button { font:inherit; min-height:44px; padding:10px 16px; background:#2a2035; color:#d3c6e1; border:1px solid #645173; border-radius:10px; cursor:pointer; }
.kl-choice button[aria-pressed=true] { background:#513669; color:white; border-color:#c19fe2; }
.kl-flow { margin:32px 0; }
.kl-flow figcaption { color:#b4a3c9; font-size:14px; margin-bottom:12px; }
.kl-flow ol { display:flex; gap:12px; padding:0; list-style:none; }
.kl-flow li { flex:1; border:1px solid #574068; border-radius:12px; padding:16px; text-align:center; background:#241b2e; }
.kl-flow li+li:before { content:'→'; display:block; color:#cbb0f1; }
@media(max-width:700px) { .kl-flow ol { flex-direction:column; } }
.kl-series { display:flex; gap:8px; flex-wrap:wrap; margin:20px 0 30px; }
.kl-series a { font-size:13px; border:1px solid #493c5c; border-radius:8px; padding:6px 12px; text-decoration:none; }
.kl-series a[aria-current=page] { color:#fff; background:#392b4a; }
.kl-mechanism ol { padding-left:26px; }
.kl-mechanism li { padding-left:8px; margin:20px 0; }
.kl-example, .kl-trap, .kl-practice, .kl-interactive, .kl-deeper { padding:22px 26px; border-radius:14px; border:1px solid #44364f; background:#1b1524; }
.kl-example { border-left:3px solid #ad83ef; }
.kl-trap { border-left:3px solid #e5c586; background:#201a20; }
.kl-example>small { color:#b3a7c0; }
.kl-glossary dl { display:grid; grid-template-columns:minmax(90px,1fr) 3fr; gap:12px 22px; }
.kl-glossary dt { color:#c5a3ef; font-weight:600; overflow-wrap:anywhere; }
.kl-glossary dd { margin:0; }
.kl-lesson summary { cursor:pointer; min-height:44px; padding:8px 0; color:#cbb0f1; }
.kl-sources { border-top:1px solid #45354e; padding-top:24px; }
.kl-sources li { margin-bottom:12px; }
.kl-sources a { overflow-wrap:anywhere; }
.kl-lesson-links li { margin:8px 0; }
.kl-lesson-links a { display:block; min-height:44px; padding:8px 0; }
.kl-next { display:block; border-top:1px solid #44364f; padding:24px 0; margin-top:40px; text-decoration:none; }
.kl-next span { display:block; font-size:14px; color:#a99eb6; }
.kl-interactive label { display:block; margin-bottom:12px; }
.kl-interactive select { font:inherit; width:100%; max-width:100%; background:#282032; color:#f0e8fa; border:1px solid #69577c; padding:12px; border-radius:8px; }
.kl-route { color:#cbb0f1; }
.kl-memory-buttons { display:flex; flex-wrap:wrap; gap:8px; }
.kl-diagram { display:flex; gap:10px; list-style:none; padding:0; align-items:stretch; }
.kl-diagram li { flex:1; text-align:center; border:1px solid #564162; border-radius:12px; padding:18px 12px; background:#241c2f; }
.kl-diagram li+li:before { content:'→'; display:block; color:#cbb0f1; }
.kl-domains button:focus-visible, .kl-lesson :is(button,a,select,summary):focus-visible, .kl-list-item :is(a,summary):focus-visible, .kl-start:focus-visible, .kl-view-switch button:focus-visible { outline:3px solid #cfb0f5; outline-offset:4px; }
@media(max-width:1000px) { .kl-list-group { grid-template-columns:160px minmax(0,1fr); gap:24px; } .knowledge-page .km-map-toolbar { flex-direction:column; } .kl-view-switch { align-self:flex-end; } }
@media(max-width:700px) { .kl-lesson { font-size:16px; } .kl-lesson h2 { font-size:21px; } .kl-example,.kl-trap,.kl-practice,.kl-interactive,.kl-deeper { padding:18px; } .kl-glossary dl { grid-template-columns:1fr; gap:4px; } .kl-glossary dd { margin-bottom:14px; } .kl-diagram { flex-direction:column; } .kl-list-item { gap:4px; } .kl-domain-title { line-height:1.6; } }
@media(prefers-reduced-motion:reduce) { .knowledge-page *, .kl-lesson * { animation:none !important; transition:none !important; } }

.kl-child-menu { margin:24px 0; }
.kl-child-menu h3 { font-size:15px; margin-bottom:10px; }
.kl-child-menu button { display:block; width:100%; text-align:left; min-height:44px; padding:10px 12px; margin:6px 0; color:var(--text); background:var(--bg-card); border:1px solid var(--border); border-radius:8px; font:inherit; cursor:pointer; }

@media(max-width:700px) {
  .knowledge-page { padding-top:96px; }
  .kl-library-head { display:block; }
  .kl-library-head h1 { font-size:28px; }
  .kl-library-head>p { font-size:14px; margin-top:4px; }
  .knowledge-page .km-hero { display:block; padding:20px 0; }
  .kl-domain-title { font-size:22px; }
  .knowledge-page .km-search-actions { margin-top:16px; grid-template-columns:minmax(0,1fr) auto; gap:8px; }
  .knowledge-page .km-search { min-height:46px; padding:0 10px; }
  .knowledge-page .km-guide-button { min-height:46px; font-size:12px; padding:8px; gap:6px; }
  .knowledge-page .km-guide-button>span { display:none; }
  .kl-domains { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:4px; }
  .kl-domains button { padding:8px; font-size:12px; gap:6px; }
  .kl-domains button>span { font-size:16px; }
  .knowledge-page .km-map-toolbar { padding-bottom:12px; gap:8px; }
  .knowledge-page .km-filters { gap:2px; }
  .knowledge-page .km-filter { font-size:12px; padding:6px; }
  .kl-view-switch { align-self:flex-start; }
  .kl-view-switch button { min-height:38px; }
  .kl-topic-list { padding-top:12px; }
  .kl-list-heading { display:block; margin-bottom:16px; }
  .kl-list-heading h2 { font-size:22px; }
  #kl-result-count { margin-top:4px; font-size:13px; }
  .kl-start { padding:16px; margin-bottom:28px; gap:12px; }
  .kl-start b { font-size:17px; }
  .kl-list-group { display:block; margin-bottom:32px; }
  .kl-list-group>header { display:flex; flex-wrap:wrap; align-items:center; gap:8px; padding:0 0 12px; }
  .kl-group-icon { font-size:20px; }
  .kl-list-group h3 { font-size:18px; margin:0; }
  .kl-group-count { margin-left:auto; font-size:12px; }
  .kl-row { gap:12px; padding:18px 4px; align-items:flex-start; }
  .kl-row-icon { width:36px; height:36px; font-size:21px; margin-top:4px; }
  .kl-row-copy b { font-size:18px; }
  .kl-row-summary { font-size:14px; }
  .kl-row-action { font-size:0; padding-top:22px; }
  .kl-row-action i { margin:0; font-size:20px; }
  .kl-inline-preview { padding:0 8px 20px 52px; }
}

/* Chapter reading: a quiet index beside substantial, topic-specific teaching. */
.kr-article-library { max-width:1140px; --chapter-color:#ad83ef; }
.kr-article-library .kl-chapter-hero { padding:12px 0 32px 260px; border-bottom:1px solid #283347; }
.kl-hero-meta { display:flex; align-items:center; flex-wrap:wrap; gap:14px; font-size:13px; color:#b7c3d4; }
.kl-hero-meta a { color:var(--chapter-color); text-decoration:none; }
.kl-hero-icon { font-size:36px; }
.kr-article-library h1 { font:600 clamp(29px,3.3vw,43px)/1.45 var(--font-head); margin:18px 0; text-wrap:pretty; }
.kl-goal { font-size:17px; line-height:1.9; color:#e8eef8; margin:0 0 18px; }
.kl-goal>span { display:block; font:500 13px/1.7 var(--font-head); color:var(--chapter-color); margin-bottom:4px; }
.kr-article-library .kr-lead { max-width:760px; font-size:17px; line-height:1.95; color:#bdc8d9; }
.kl-hero-footer { display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px; margin-top:24px; font-size:12px; color:#b2bfd1; }
.kl-hero-footer a { display:inline-flex; align-items:center; gap:12px; padding:10px 16px; min-height:44px; border:1px solid #43536b; border-radius:6px; color:#f0f3f8; text-decoration:none; font:500 14px var(--font-head); }
.kl-chapter { max-width:none; margin:0; padding:40px 0 0; font-size:17px; line-height:1.95; color:#e2e9f4; }
.kl-layout { display:grid; grid-template-columns:210px minmax(0,760px); gap:50px; }
body:has(.kl-chapter) { overflow-x:clip; }
.kl-prose { min-width:0; overflow-wrap:break-word; }
.kl-toc { position:sticky; top:88px; align-self:start; max-height:calc(100vh - 120px); overflow:auto; padding-right:4px; }
.kl-toc h2 { margin:0 0 14px; font:500 14px var(--font-head); color:#c4cfdd; }
.kl-toc ol,.kl-mobile-toc ol { list-style:none; margin:0; padding:0; }
.kl-toc li { margin:0; }
.kl-toc a { display:block; padding:9px 0; min-height:38px; font-size:13px; line-height:1.7; color:#aebbd0; text-decoration:none; }
.kl-toc a>span { margin-right:8px; color:#778da8; font-variant-numeric:tabular-nums; }
.kl-toc a[aria-current=location] { color:#e5c586; }
.kl-toc a:hover { color:#f3f5fa; }
.kl-toc .kl-back-to-top { margin-top:16px; border-top:1px solid #283347; }
.kl-mobile-toc { display:none; }
.kl-chapter .kl-takeaways { margin:0 0 24px; }
.kl-takeaways h2 { font:500 18px/1.7 var(--font-head); margin:0 0 10px; color:#e5c586; }
.kl-takeaways ul { padding-left:22px; margin:0; }
.kl-takeaways li { padding-left:6px; margin:10px 0; }
.kl-terms { border-top:1px solid #283347; border-bottom:1px solid #283347; padding:6px 0; margin:28px 0 48px; }
.kl-chapter .kl-terms summary { color:#bccce1; font-size:14px; }
.kl-terms dl { margin:12px 0 20px; }
.kl-terms dl>div { display:grid; grid-template-columns:170px minmax(0,1fr); gap:20px; padding:12px 0; border-top:1px solid #202b3b; font-size:15px; }
.kl-terms dt { font-weight:600; color:#e7edf6; }
.kl-terms dd { margin:0; }
.kl-terms small { display:block; color:#b8c5d8; margin-top:6px; }
.kl-chapter .kl-section { margin:0 0 60px; padding:0; scroll-margin-top:96px; }
.kl-chapter h2 { font:600 25px/1.65 var(--font-head); margin:0 0 16px; color:#f0f4fa; text-wrap:pretty; }
.kl-chapter h3 { font:500 19px/1.7 var(--font-head); margin:28px 0 10px; color:#e4edf8; }
.kl-chapter .kl-toc h2 { font:500 14px/1.7 var(--font-head); margin:0 0 14px; color:#c4cfdd; }
.kl-chapter p { margin:14px 0; }
.kl-chapter .kl-section-number { color:#e5c586; font:500 12px var(--font-head); letter-spacing:.08em; margin:0 0 8px; }
.kl-chapter :is(ul,ol)>li { margin:10px 0; padding-left:4px; }
.kl-chapter :is(a,summary) { color:#a7cdf3; }
.kl-chapter b,.kl-chapter strong { color:#fff; font-weight:700; }
.kl-chapter blockquote { margin:24px 0; padding:20px 24px; background:#0e1929; border:1px solid #35465c; border-radius:6px; }
.kl-chapter blockquote p:first-child { margin-top:0; }
.kl-chapter blockquote p:last-child { margin-bottom:0; }
.kl-case { margin:28px 0; padding:24px; background:#101b2b; border:1px solid #344459; border-radius:8px; }
.kl-case>p:first-child,.kl-note>p:first-child,.kl-checklist>p:first-child { margin-top:0; }
.kl-case>p:last-child,.kl-note>p:last-child,.kl-checklist>p:last-child { margin-bottom:0; }
.kl-note,.kl-checklist { padding:20px 0; margin:22px 0; border-top:1px solid #344459; border-bottom:1px solid #344459; }
.kl-checklist ol,.kl-checklist ul { padding-left:24px; }
.kl-compare { display:grid; grid-template-columns:1fr 1fr; gap:24px; margin:24px 0; }
.kl-compare>div { min-width:0; }
.kl-compare h3 { margin-top:0; }
.kl-table-wrap { overflow-x:auto; max-width:100%; margin:26px 0; border:1px solid #344459; border-radius:6px; }
.kl-chapter table { width:100%; border-collapse:collapse; font-size:15px; line-height:1.8; }
.kl-chapter caption { text-align:left; padding:14px 18px; color:#d3dfed; background:#142238; font-weight:600; }
.kl-chapter :is(th,td) { padding:14px 16px; border-top:1px solid #344459; text-align:left; vertical-align:top; min-width:125px; }
.kl-chapter thead th { background:#0d1829; color:#d6e5f6; font-weight:600; }
.kl-chapter tbody th { color:#e9eff8; font-weight:600; }
.kl-chapter figure { margin:28px 0; }
.kl-chapter figcaption { font-size:13px; line-height:1.85; color:#bbc8da; margin-top:12px; }
.kl-chapter img { max-width:100%; height:auto; border-radius:6px; }
.kl-makeup-panels { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px; margin:28px 0 0; }
.kl-chapter .kl-makeup-panels figure { margin:0; min-width:0; }
.kl-chapter .kl-makeup-panels img { display:block; width:100%; height:auto; aspect-ratio:4/5; object-fit:cover; }
.kl-makeup-panels figure:nth-child(1) img { object-position:left center; }
.kl-makeup-panels figure:nth-child(2) img { object-position:center center; }
.kl-makeup-panels figure:nth-child(3) img { object-position:right center; }
.kl-chapter .kl-lab { background:#111f31; border:1px solid #435a78; border-radius:8px; padding:24px; }
.kl-lab>p:first-child { margin-top:0; }
.kl-chapter .kl-lab label { margin-top:20px; font-size:15px; color:#e2eaf5; }
.kl-lab label output { float:right; font-variant-numeric:tabular-nums; color:#9bd4ff; margin-left:8px; }
.kl-lab input[type=range] { width:100%; height:44px; accent-color:#79bdf2; cursor:pointer; }
.kl-lab textarea,.kl-chapter .kl-lab select { width:100%; max-width:100%; padding:12px; font:inherit; font-size:16px; line-height:1.8; color:#f1f4f9; background:#081421; border:1px solid #587296; border-radius:6px; }
.kl-lab textarea { resize:vertical; }
.kl-lab textarea::placeholder { color:#a6b6cc; }
.kl-capacity-label { display:flex; justify-content:space-between; gap:12px; font-size:14px; margin:12px 0 5px; }
.kl-bar-track { width:100%; height:18px; background:#26344a; border-radius:3px; overflow:hidden; }
.kl-bar { height:100%; }
.kl-bar-available { background:#79bdf2; }
.kl-bar-needed { background:#e5c586; }
.kl-lab-result { font-size:20px; color:#b3e1ff; font-variant-numeric:tabular-nums; }
.kl-answer-preview { white-space:pre-wrap; border-top:1px solid #435a78; padding-top:20px; }
.kl-chapter .kl-practice { border:0; border-radius:0; background:none; }
.kl-question { border:0; border-top:1px solid #3a4a63; padding:24px 0 0; margin:28px 0 36px; min-width:0; }
.kl-question legend { padding:0 10px 0 0; font-weight:600; font-size:17px; line-height:1.9; color:#eef4fc; }
.kl-question legend>span { color:#9dbade; display:block; font-size:13px; margin-bottom:6px; }
.kl-options { display:grid; gap:10px; }
.kl-options button { display:flex; align-items:flex-start; gap:12px; text-align:left; font:400 16px/1.85 var(--font-body); padding:14px 16px; color:#dce7f5; background:#0c1829; border:1px solid #435572; border-radius:6px; cursor:pointer; min-height:48px; }
.kl-options button>span { flex:none; color:#9eb7d8; font-size:13px; padding-top:2px; }
.kl-options button:hover { background:#14263e; border-color:#7ea2cc; }
.kl-options button[data-result=correct] { background:#102b28; border-color:#75b3a3; }
.kl-options button[data-result=retry] { background:#2d2517; border-color:#c6a263; }
.kl-feedback { padding:18px 0; color:#dbd0ae; }
.kl-feedback[data-result=correct] { color:#abd8c7; }
.kl-chapter .kl-sources { border-color:#344459; padding-top:24px; margin:44px 0; scroll-margin-top:96px; }
.kl-chapter .kl-sources ul { padding-left:20px; font-size:14px; }
.kl-chapter .kl-lesson-links { border-top:1px solid #344459; padding-top:24px; margin:40px 0; }
.kl-chapter .kl-lesson-links h2 { font-size:20px; }
.kl-chapter-nav { display:grid; grid-template-columns:1fr 1fr; gap:28px; margin-top:48px; padding:24px 0; border-top:1px solid #344459; }
.kl-chapter-nav>div:last-child { text-align:right; }
.kl-chapter-nav small { display:block; color:#aebdd1; font-size:13px; }
.kl-chapter-nav a { display:block; min-height:44px; padding:8px 0; font-size:16px; text-decoration:none; }
.kl-chapter :is(button,a,select,summary,textarea,input):focus-visible,.kl-chapter-hero a:focus-visible { outline:3px solid #aacff9; outline-offset:4px; }
@media(max-width:1000px) {
  .kr-article-library .kl-chapter-hero { padding-left:0; max-width:760px; margin:auto; }
  .kl-layout { display:block; max-width:760px; margin:auto; }
  .kl-toc { display:none; }
  .kl-mobile-toc { display:block; margin:0 0 32px; border-top:1px solid #344459; border-bottom:1px solid #344459; padding:4px 0; }
  .kl-mobile-toc nav { padding:4px 0 16px; }
  .kl-mobile-toc a { display:block; min-height:44px; padding:8px 0; font-size:14px; text-decoration:none; }
  .kl-mobile-toc a>span { margin-right:10px; color:#9aafc9; }
}
@media(max-width:620px) {
  .kr-article-library .kr-crumb { margin-bottom:16px; font-size:12px; }
  .kr-article-library .kl-chapter-hero { padding:8px 0 24px; }
  .kl-hero-meta { gap:10px; font-size:12px; }
  .kl-hero-icon { font-size:28px; }
  .kr-article-library h1 { font-size:29px; line-height:1.55; }
  .kl-goal,.kr-article-library .kr-lead,.kl-chapter { font-size:16px; line-height:1.9; }
  .kl-hero-footer { display:block; }
  .kl-hero-footer a { margin-top:14px; }
  .kl-chapter { padding-top:28px; }
  .kl-chapter h2 { font-size:22px; }
  .kl-chapter .kl-section { margin-bottom:44px; }
  .kl-chapter .kl-case,.kl-chapter .kl-lab { padding:18px; }
  .kl-terms dl>div { display:block; }
  .kl-terms dd { margin-top:6px; }
  .kl-compare { display:block; }
.kl-makeup-panels { grid-template-columns:1fr; max-width:340px; margin-left:auto; margin-right:auto; gap:28px; }
  .kl-compare>div+div { margin-top:24px; }
  .kl-chapter table { font-size:14px; }
  .kl-chapter :is(th,td) { padding:12px; }
  .kl-options button { font-size:15px; padding:12px; }
  .kl-chapter-nav { grid-template-columns:1fr; gap:20px; }
  .kl-chapter-nav>div:last-child { text-align:left; }
}
.kl-offer-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; margin:16px 0; }
.kl-offer { min-width:0; margin:0; padding:14px 16px 6px; border:1px solid #435a78; border-radius:8px; }
.kl-offer legend { padding:0 6px; color:#e2eaf5; font-weight:600; }
.kl-chapter .kl-offer label { margin-top:10px; font-size:14px; }
.kl-offer input { display:block; width:100%; margin-top:6px; padding:10px; font:inherit; font-size:16px; color:#f1f4f9; background:#081421; border:1px solid #587296; border-radius:6px; }
@media (max-width:640px) { .kl-offer-grid { grid-template-columns:1fr; } }
.kl-chain { display:flex; flex-wrap:wrap; align-items:center; gap:6px; margin:16px 0; }
.kl-chain>span { color:#7d8ea8; }
.kl-chain button { font:inherit; min-height:44px; padding:8px 12px; color:#d3dceb; background:#13233a; border:1px solid #435a78; border-radius:8px; cursor:pointer; }
.kl-chain button[data-state=edited] { background:#4a3415; border-color:#e5a54b; color:#fff; }
.kl-chain button[data-state=broken] { background:#3d1720; border-color:#e06c7f; color:#ffd6dd; text-decoration:line-through; }
.kl-chain button[data-state=ok] { border-color:#5fb98a; }
.kl-flags { display:grid; gap:8px; margin:14px 0; }
.kl-chapter .kl-flags label { display:flex; gap:10px; align-items:flex-start; margin:0; font-size:15px; cursor:pointer; }
.kl-flags input { width:20px; height:20px; margin-top:4px; accent-color:#e06c7f; flex:none; }
@media(max-width:700px) { .kl-domains button:last-child:nth-child(odd) { grid-column:1 / -1; } }
.kl-sec-icon { margin-right:.45em; }
.kl-figure { margin:18px 0 24px; }
.kl-figure img { display:block; width:100%; max-width:100%; height:auto; aspect-ratio:16/9; object-fit:cover; background:#0b1120; border:1px solid #344459; border-radius:10px; }
.kl-figure figcaption { margin-top:8px; font-size:14px; line-height:1.6; color:#c9d3e2; }
.kl-figure figcaption small { display:block; margin-top:2px; font-size:12px; color:#8fa0b8; }
.kl-figure figcaption a { color:#9bd4ff; }
.kl-figure.is-ai img { border-style:dashed; }
/* 🧩 visual components for static-library chapters (parity with MoneyBasics cards/flows) */
.kl-cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(170px,1fr)); gap:14px; margin:22px 0; }
.kl-cards[data-n="4"] { grid-template-columns:repeat(2,minmax(0,1fr)); }
.kl-path>li { text-align:left; }
.kl-card { min-width:0; padding:16px 16px 14px; background:#18294a; border:1px solid #4a6488; border-top:3px solid #e5c586; border-radius:10px; }
.kl-card-ic { display:block; font-size:26px; line-height:1.2; }
.kl-chapter .kl-card h4 { margin:8px 0 6px; font-size:16px; line-height:1.5; color:#f1f4f9; }
.kl-card p { margin:0; font-size:14.5px; line-height:1.75; color:#c9d3e2; }
.kl-path { list-style:none; display:flex; flex-wrap:wrap; gap:26px; margin:24px 0; padding:0; counter-reset:none; }
.kl-path>li { position:relative; flex:1 1 170px; min-width:0; margin:0; padding:14px 14px 12px; background:#18294a; border:1px solid #5a77a0; border-radius:10px; }
.kl-path>li:not(:last-child)::after { content:'→'; position:absolute; right:-21px; top:50%; transform:translateY(-50%); color:#e5c586; font-size:18px; }
.kl-path-n { display:inline-flex; align-items:center; justify-content:center; width:26px; height:26px; margin-bottom:8px; border-radius:50%; background:#e5c586; color:#0b1120; font-size:14px; font-weight:700; }
.kl-path>li p { margin:0; font-size:14.5px; line-height:1.75; }
.kl-block { font-family:ui-monospace,SFMono-Regular,Consolas,monospace; font-size:13px; }
.kl-block code { color:#9bd4ff; word-break:break-all; }
.kl-path { flex-wrap:nowrap; }
.kl-compare .kl-path, .kl-path:has(> li:nth-child(4)) { flex-direction:column; gap:22px; }
.kl-compare .kl-path>li, .kl-path:has(> li:nth-child(4))>li { flex:0 0 auto; }
.kl-compare .kl-path>li:not(:last-child)::after, .kl-path:has(> li:nth-child(4))>li:not(:last-child)::after { content:'↓'; right:auto; left:50%; top:auto; bottom:-21px; transform:translateX(-50%); }
@media (max-width:700px) { .kl-cards[data-n="4"] { grid-template-columns:1fr; } .kl-path { flex-direction:column; gap:22px; } .kl-path>li { flex:0 0 auto; } .kl-path>li:not(:last-child)::after { content:'↓'; right:auto; left:50%; top:auto; bottom:-21px; transform:translateX(-50%); } }
/* DRAM leak toy + HBM compare (2026-10-06) */
.kl-lab h3 { margin:22px 0 8px; font-size:18px; }
.kl-lab h3:first-child { margin-top:0; }
.kl-check { display:flex; align-items:center; gap:10px; margin:12px 0; min-height:44px; cursor:pointer; }
.kl-check input { width:20px; height:20px; accent-color:#e5c586; }
.kl-toy-msg { margin:14px 0 6px; padding:12px 14px; background:#14243c; border-left:3px solid #e5c586; border-radius:6px; color:#e6edf6; }
.kl-hbm-compare { list-style:none; margin:12px 0; padding:0; display:grid; gap:8px; }
.kl-hbm-compare li { padding:10px 12px; background:#14243c; border:1px solid #344459; border-radius:8px; }
.kl-hbm-compare output { color:#b3e1ff; font-weight:700; font-variant-numeric:tabular-nums; }
.kl-more { margin:20px 0; border:1px solid #344459; border-radius:8px; background:#101b2b; }
.kl-more>summary { cursor:pointer; padding:14px 16px; min-height:44px; font-weight:700; color:#e6edf6; }
.kl-more>summary span { margin-left:8px; font-weight:400; font-size:13px; color:var(--text-muted); }
.kl-more>*:not(summary) { margin-left:16px; margin-right:16px; }
.kl-more[open]>summary { border-bottom:1px solid #344459; margin-bottom:12px; }

/* End-of-lesson mark (Audi 2026-10-17: "ระบบติกว่าอ่านแล้ว … ทั้งสองอย่างเลย"): satin card with a gold-foil edge;
   gold button before, green state after; the course page counts the same mark. */
.kr-done { position:relative; isolation:isolate; display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:14px 20px; margin:40px auto 28px; max-width:920px; padding:18px 22px; border-radius:16px; background:linear-gradient(155deg,#34405f,#1d2640); color:#f3eee2; box-shadow:0 26px 52px -32px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.14); }
.kr-done::before { content:""; position:absolute; inset:0; z-index:-1; padding:1.5px; border-radius:inherit; background:linear-gradient(135deg,#f2e1b4,#a8853f 32%,#f6e6bd 55%,#8f6d2e 80%,#e9d3a0); pointer-events:none; -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0); -webkit-mask-composite:xor; mask:linear-gradient(#000 0 0) content-box exclude,linear-gradient(#000 0 0); }
.kr-done-copy { display:grid; gap:2px; min-width:0; }
.kr-done-copy b { color:#f5e3b3; font:600 19px/1.4 var(--font-head); }
.kr-done-copy small { color:#dfe5f0; font-size:14px; line-height:1.5; }
.kr-done.is-on .kr-done-copy b { color:#a5f0c8; }
.kr-done-actions { display:flex; flex-wrap:wrap; align-items:center; gap:8px; }
.kr-done-btn { display:inline-flex; align-items:center; gap:8px; min-height:46px; padding:10px 18px; border:1px solid #f0cf80; border-radius:999px; background:linear-gradient(110deg,#f1c65c,#dca844); color:#171207; font:800 15px/1.2 var(--font-head); cursor:pointer; box-shadow:0 10px 24px -12px rgba(241,198,92,.75); transition:transform .16s, filter .16s; }
.kr-done-btn:hover { filter:brightness(1.06); transform:translateY(-1px); }
.kr-done.is-on .kr-done-btn { border-color:#5fcf98; background:rgba(77,210,160,.18); color:#a5f0c8; box-shadow:none; }
.kr-done-back, .kr-done-undo { display:inline-flex; align-items:center; min-height:46px; padding:10px 16px; border:1px solid rgba(226,232,242,.3); border-radius:999px; background:rgba(8,14,30,.42); color:#eef1f7; font:700 14px/1.2 var(--font-head); text-decoration:none; cursor:pointer; }
.kr-done-back:hover, .kr-done-undo:hover { border-color:#f0cf80; color:#f5e3b3; }
.kr-done-undo { border-color:#f0cf80; color:#f5d98d; }
.kr-done :is(.kr-done-btn,.kr-done-back,.kr-done-undo):focus-visible { outline:2px solid #f5d98d; outline-offset:3px; }
@media (max-width:700px) { .kr-done { margin:28px 12px 20px; padding:16px; } .kr-done-actions { width:100%; display:grid; grid-template-columns:1fr; } .kr-done-btn,.kr-done-back,.kr-done-undo { justify-content:center; } }
html[data-ak-light][data-theme=light] .kr-done { background:linear-gradient(155deg,#fffdf8,#f4f1ea); color:#2b2212; box-shadow:0 22px 44px -30px rgba(64,48,20,.45), inset 0 1px 0 #fff; }
html[data-ak-light][data-theme=light] .kr-done::before { background:linear-gradient(135deg,#c9a251,#7d5a1c 32%,#d9b86a 55%,#6d4c14 80%,#c49a48); }
html[data-ak-light][data-theme=light] .kr-done-copy b { color:#6d4c14; }
html[data-ak-light][data-theme=light] .kr-done.is-on .kr-done-copy b { color:#17663f; }
html[data-ak-light][data-theme=light] .kr-done-copy small { color:#4a4232; }
html[data-ak-light][data-theme=light] .kr-done.is-on .kr-done-btn { border-color:#23935a; background:#e3f6ea; color:#17663f; }
html[data-ak-light][data-theme=light] :is(.kr-done-back,.kr-done-undo) { border-color:#b9a77d; background:#fff; color:#2b2212; }
html[data-ak-light][data-theme=light] .kr-done :is(.kr-done-btn,.kr-done-back,.kr-done-undo):focus-visible { outline-color:#7a4f06; }
@media (prefers-reduced-motion:reduce) { .kr-done-btn { transition:none; } }

/* Diary paper for the lesson tick card (same tokens as knowledge-map.css). */
.knowledge-page, .kr-done {
  --pp-paper: radial-gradient(140% 90% at 50% 0%, #fffaf0, #f6eedb 70%, #efe4cb);
  --pp-flat: #f6eedb;
  --pp-ink: #2a2118;
  --pp-ink2: #5a4a36;
  --pp-ink3: #6e5c44;
  --pp-line: rgba(42, 33, 24, .14);
  --pp-accent: #7a3a17;
  --pp-chip: linear-gradient(90deg, rgba(201, 162, 79, .3), rgba(201, 162, 79, .1));
  --pp-ring: #b08a3a;
  --pp-green: #1d6a43;
  --pp-amber: #7a5208;
  --pp-stack: 0 0 0 1px rgba(60, 40, 20, .35), 3px 4px 0 -1px #e3d8bf, 6px 7px 0 -2px #cdbf9f, 9px 10px 0 -3px #b9a984;
  --pp-soft: 0 0 0 1px rgba(60, 40, 20, .28), 3px 4px 0 -1px #e3d8bf, 6px 7px 0 -2px #cdbf9f;
}

/* Lesson page tick card (learn-node.html). */
html:not([data-theme=light]) .kr-done { background: var(--pp-paper), var(--pp-flat); color: var(--pp-ink); box-shadow: var(--pp-stack); }
html:not([data-theme=light]) .kr-done::before { display: none; }
html:not([data-theme=light]) .kr-done-copy b { color: var(--pp-ink); }
html:not([data-theme=light]) .kr-done.is-on .kr-done-copy b { color: var(--pp-green); }
html:not([data-theme=light]) .kr-done-copy small { color: var(--pp-ink2); }
html:not([data-theme=light]) .kr-done.is-on .kr-done-btn { border-color: var(--pp-green); background: #e3f1e6; color: var(--pp-green); }
html:not([data-theme=light]) .kr-done-back, html:not([data-theme=light]) .kr-done-undo { border-color: rgba(42, 33, 24, .32); background: #fffaf0; color: var(--pp-ink); }
html:not([data-theme=light]) .kr-done-undo { border-color: var(--pp-ring); color: var(--pp-accent); }
html:not([data-theme=light]) .kr-done :is(.kr-done-btn, .kr-done-back, .kr-done-undo):focus-visible { outline-color: #7a4f06; }