/* ============================================================
   Knowledge base (/knowledge-base/ and its concept pages).
   Generated by build-kb.py; everything is scoped to body.kb.
   Its own look: a numbered learning path (a vertical track
   with stations) on the hub, and a two-column reading layout
   with a sticky "on this page" rail on concept pages.
   ============================================================ */

.kb {
  --kb-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --kb-track: #E2E8F0;
  --kb-tint: #FEF2F2;
  --kb-tint-border: #FECACA;
  --kb-code-bg: #F1F5F9;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .kb {
    --kb-track: #334155;
    --kb-tint: rgba(248,113,113,.08);
    --kb-tint-border: rgba(248,113,113,.28);
    --kb-code-bg: #1E293B;
  }
}
:root[data-theme="dark"] .kb {
  --kb-track: #334155;
  --kb-tint: rgba(248,113,113,.08);
  --kb-tint-border: rgba(248,113,113,.28);
  --kb-code-bg: #1E293B;
}

/* ---------- Breadcrumb (own copy, so it doesn't depend on a newer style.css) ---------- */
.kb .kb-crumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin: 0 0 1.25rem;
  font-size: 0.8125rem; color: var(--text-muted); }
.kb .kb-crumbs a { color: var(--text-muted); text-decoration: none; }
.kb .kb-crumbs a:hover { color: var(--red-text); }
.kb .kb-crumbs [aria-current] { color: var(--text); font-weight: 600; }

/* ============================================================
   Hub
   ============================================================ */
.kb .kb-hubhero { padding: 3.25rem 0 3.5rem; border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--muted-bg), var(--bg)); }
.kb .kb-hubhero__grid { display: grid; grid-template-columns: 1fr; gap: 2.5rem; align-items: start; }
@media (min-width: 980px) { .kb .kb-hubhero__grid { grid-template-columns: 1.25fr 1fr; gap: 4rem; } }
.kb .kb-hubhero__title { margin: 0 0 1.1rem; font-size: clamp(2.1rem, 4.4vw, 3.3rem); font-weight: 800;
  letter-spacing: -0.035em; line-height: 1.08; color: var(--text); text-wrap: balance; }
.kb .kb-hubhero__title em { font-style: normal; color: var(--red-text); }
.kb .kb-hubhero__kicker { display: block; margin-bottom: 0.9rem; padding-left: 0.75rem; border-left: 3px solid var(--red);
  font-size: 1.0625rem; font-weight: 700; letter-spacing: 0; line-height: 1.4; color: var(--text-muted); }
.kb .kb-hubhero__lede { max-width: 600px; margin: 0 0 1.5rem; font-size: 1.0625rem; line-height: 1.7; color: var(--text-muted); }
.kb .kb-hubhero__facts { display: flex; flex-wrap: wrap; gap: 0.5rem 1.75rem; list-style: none; margin: 0 0 1.75rem; padding: 0;
  font-size: 0.9375rem; color: var(--text-muted); }
.kb .kb-hubhero__facts strong { color: var(--text); font-size: 1.25rem; font-weight: 800; margin-right: 0.2rem; }

/* The path map: five stations on a vertical track */
.kb .kb-map { background: var(--surface); border: 1px solid var(--border); border-radius: 0.75rem; padding: 1.5rem 1.5rem 1.25rem;
  box-shadow: var(--shadow-md); }
.kb .kb-map__label { margin: 0 0 1rem; font-family: var(--kb-mono); font-size: 0.75rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-muted); }
.kb .kb-map ol { list-style: none; margin: 0; padding: 0; position: relative; }
.kb .kb-map ol::before { content: ""; position: absolute; left: 1.05rem; top: 1rem; bottom: 1rem; width: 2px; background: var(--kb-track); }
.kb .kb-map li a { position: relative; display: grid; grid-template-columns: 2.1rem 1fr; column-gap: 0.9rem; align-items: center;
  padding: 0.55rem 0; text-decoration: none; color: var(--text); }
.kb .kb-map__num { grid-row: span 2; width: 2.1rem; height: 2.1rem; border-radius: 50%; display: grid; place-items: center;
  background: var(--surface); border: 2px solid var(--red); color: var(--red-text); font-family: var(--kb-mono); font-size: 0.8125rem; font-weight: 700;
  position: relative; z-index: 1; transition: background .15s, color .15s; }
.kb .kb-map__name { font-weight: 700; font-size: 0.975rem; line-height: 1.3; }
.kb .kb-map__aud { font-size: 0.8125rem; color: var(--text-muted); }
.kb .kb-map li a:hover .kb-map__num { background: var(--red); color: #fff; }
.kb .kb-map li a:hover .kb-map__name { color: var(--red-text); }

/* Vertical padding only: the shorthand used to zero .container's side gutter, so on phones
   everything below the hero ran edge to edge. */
.kb .kb-hubbody { padding-top: 3.5rem; padding-bottom: 5rem; }

.kb .kb-howto { margin-bottom: 3.5rem; }
.kb .kb-howto h2 { font-size: 1.375rem; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 1.25rem; }
.kb .kb-howto__grid { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 820px) { .kb .kb-howto__grid { grid-template-columns: repeat(3, 1fr); } }
.kb .kb-howto__grid p { margin: 0; padding: 1.1rem 1.25rem; border: 1px solid var(--border); border-radius: var(--radius);
  font-size: 0.9375rem; line-height: 1.65; color: var(--text-muted); background: var(--surface); }
.kb .kb-howto__grid strong { display: block; color: var(--text); margin-bottom: 0.25rem; }
.kb .kb-howto__grid a, .kb .kb-faq a { color: var(--red-text); }

/* Level sections: sticky heading column + numbered steps on a track */
.kb .kb-levelsec { display: grid; grid-template-columns: 1fr; gap: 1.25rem; padding: 2.75rem 0; border-top: 1px solid var(--border);
  scroll-margin-top: 5rem; }
@media (min-width: 980px) {
  .kb .kb-levelsec { grid-template-columns: 300px 1fr; gap: 3rem; }
  .kb .kb-levelsec__head { position: sticky; top: 5.5rem; align-self: start; }
}
.kb .kb-levelsec__num { margin: 0 0 0.4rem; font-family: var(--kb-mono); font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--red-text); }
.kb .kb-levelsec__head h2 { margin: 0 0 0.4rem; font-size: 1.625rem; font-weight: 800; letter-spacing: -0.025em; line-height: 1.2; }
.kb .kb-levelsec__aud { margin: 0 0 0.75rem; font-size: 0.875rem; color: var(--text-muted); }
.kb .kb-levelsec__sum { margin: 0; font-size: 0.9375rem; line-height: 1.65; color: var(--text-muted); }

.kb .kb-steps { list-style: none; margin: 0; padding: 0; position: relative; }
.kb .kb-steps::before { content: ""; position: absolute; left: 1.2rem; top: 1.5rem; bottom: 1.5rem; width: 2px; background: var(--kb-track); }
.kb .kb-step__link { position: relative; display: grid; grid-template-columns: 2.4rem 1fr; column-gap: 1rem; row-gap: 0.25rem;
  padding: 0.9rem 0.75rem 0.9rem 0; border-radius: var(--radius); text-decoration: none; color: var(--text); }
@media (min-width: 720px) { .kb .kb-step__link { grid-template-columns: 2.4rem 1fr auto; } }
.kb .kb-step__num { width: 2.4rem; height: 2.4rem; border-radius: 50%; display: grid; place-items: center; align-self: start;
  background: var(--bg); border: 2px solid var(--kb-track); font-family: var(--kb-mono); font-size: 0.8125rem; font-weight: 700;
  color: var(--text-muted); position: relative; z-index: 1; transition: border-color .15s, color .15s, background .15s; }
.kb .kb-step__text { display: flex; flex-direction: column; gap: 0.2rem; min-width: 0; }
.kb .kb-step__title { font-weight: 700; font-size: 1.0625rem; line-height: 1.35; }
.kb .kb-step__desc { font-size: 0.9rem; line-height: 1.55; color: var(--text-muted); }
.kb .kb-step__meta { grid-column: 2; font-family: var(--kb-mono); font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; }
@media (min-width: 720px) { .kb .kb-step__meta { grid-column: 3; padding-top: 0.2rem; } }
.kb .kb-step__link:hover .kb-step__num { border-color: var(--red); color: var(--red-text); }
.kb .kb-step__link:hover .kb-step__title { color: var(--red-text); }
.kb .kb-step__link:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

.kb .kb-faq--hub { padding-top: 2.75rem; border-top: 1px solid var(--border); max-width: 820px; }
.kb .kb-faq--hub h2 { font-size: 1.625rem; font-weight: 800; letter-spacing: -0.025em; margin: 0 0 1rem; }
.kb .kb-hubcta { max-width: 820px; }

/* ============================================================
   Concept pages
   ============================================================ */
.kb .kb-wrap { padding-top: 2rem; padding-bottom: 5rem; }
.kb .kb-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
@media (min-width: 1100px) {
  .kb .kb-layout { grid-template-columns: minmax(0, 740px) 270px; gap: 4rem; justify-content: space-between; }
  .kb .kb-side { position: sticky; top: 5.5rem; align-self: start; max-height: calc(100vh - 7rem); overflow-y: auto; }
}
.kb .kb-article { min-width: 0; }

.kb .kb-hero { padding: 0.5rem 0 1.75rem; }
.kb .kb-level { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 0.45rem; margin: 0 0 0.9rem;
  font-size: 0.8125rem; font-weight: 700; color: var(--text); }
.kb .kb-level__num { display: inline-grid; place-items: center; min-width: 1.9rem; height: 1.9rem; padding: 0 0.3rem; border-radius: 50%;
  border: 2px solid var(--red); color: var(--red-text); font-family: var(--kb-mono); font-size: 0.75rem; }
.kb .kb-level__sep { color: var(--text-muted); font-weight: 400; }
.kb .kb-hero h1 { margin: 0 0 0.85rem; font-size: clamp(1.85rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15;
  text-wrap: balance; }
.kb .kb-meta { margin: 0; font-size: 0.875rem; color: var(--text-muted); }
.kb .kb-prereq { margin: 0.75rem 0 0; font-size: 0.875rem; color: var(--text-muted); }
.kb .kb-prereq span { font-weight: 700; color: var(--text); }
.kb .kb-prereq a { color: var(--red-text); }

.kb .kb-def { margin: 0 0 2.25rem; padding: 1.25rem 1.5rem; border: 1px solid var(--kb-tint-border); border-radius: 0.75rem; background: var(--kb-tint); }
.kb .kb-def__label { margin: 0 0 0.4rem; font-family: var(--kb-mono); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--red-text); }
.kb .kb-def p:last-child { margin: 0; font-size: 1.0625rem; line-height: 1.7; color: var(--text); }

.kb .kb-body h2 { scroll-margin-top: 5.5rem; }
.kb .kb-body pre { margin: 1.25rem 0 1.5rem; padding: 1rem 1.25rem; overflow-x: auto; border-radius: var(--radius); background: var(--kb-code-bg);
  border: 1px solid var(--border); font-size: 0.85rem; line-height: 1.6; }
.kb .kb-body code { font-family: var(--kb-mono); font-size: 0.9em; background: var(--kb-code-bg); padding: 0.1em 0.35em; border-radius: 0.25rem;
  overflow-wrap: anywhere; }
.kb .kb-body pre code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; }
.kb .kb-body .stride-table td, .kb .kb-body .stride-table th { font-size: 0.9375rem; }

.kb .kb-formula { margin: 1.5rem 0; padding: 1rem 1.25rem; border: 1px dashed var(--border); border-radius: var(--radius); text-align: center; }
.kb .kb-formula p { margin: 0 !important; font-family: var(--kb-mono); font-size: 1.0625rem !important; font-weight: 700; }

.kb .kb-example { margin: 2rem 0; padding: 1.25rem 1.5rem 0.5rem; border: 1px solid var(--border); border-top: 3px solid var(--text);
  border-radius: 0 0 var(--radius) var(--radius); background: var(--muted-bg); }
.kb .kb-example__label { margin: 0 0 0.6rem !important; font-family: var(--kb-mono); font-size: 0.75rem !important; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted) !important; }
.kb .kb-example p, .kb .kb-example li { font-size: 1rem; }
.kb .kb-example .table-scroll { margin: 1rem 0 1.25rem; }

.kb .kb-takeaways { margin: 3rem 0 0; padding: 1.5rem 1.5rem 0.75rem; border: 1px solid var(--border); border-radius: 0.75rem; }
.kb .kb-takeaways h2 { margin-top: 0 !important; font-size: 1.125rem !important; }
.kb .kb-takeaways ul { list-style: none; padding-left: 0; }
.kb .kb-takeaways li { position: relative; padding-left: 1.75rem; }
.kb .kb-takeaways li::before { content: ""; position: absolute; left: 0.2rem; top: 0.55em; width: 0.7rem; height: 0.4rem;
  border-left: 2px solid var(--red); border-bottom: 2px solid var(--red); transform: rotate(-45deg); }

/* FAQ: the site's .faq-list / .faq-item component (style.css). The question is an <h3> in
   the <summary>, so reset the heading and .post-body sizes that would otherwise apply. */
.kb .kb-faq .faq-list { margin-top: 1rem; }
.kb .kb-faq .faq-item summary h3 { margin: 0 !important; font-size: 1rem; font-weight: 600; line-height: 1.45; color: var(--text); }
.kb .kb-faq .faq-item p { margin: 0 !important; font-size: 0.9375rem !important; line-height: 1.7 !important; color: var(--text-muted) !important; }
.kb .kb-faq .faq-item p a { color: var(--red-text); }
@media (max-width: 640px) {
  .kb .kb-faq .faq-item summary { padding: 1rem 1.1rem; }
  .kb .kb-faq .faq-item p { padding: 0.5rem 1.1rem 1.1rem; }
}

.kb .kb-pathnav a { max-width: 48%; }
@media (max-width: 560px) { .kb .kb-pathnav a { max-width: 100%; } }

/* Side rail */
.kb .kb-side { display: flex; flex-direction: column; gap: 1rem; }
.kb .kb-side__box { padding: 1.1rem 1.25rem; border: 1px solid var(--border); border-radius: 0.75rem; background: var(--surface); }
.kb .kb-side__label { margin: 0 0 0.6rem; font-family: var(--kb-mono); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-muted); }
.kb .kb-toc, .kb .kb-levellist { margin: 0; padding: 0; list-style: none; }
.kb .kb-toc li a, .kb .kb-levellist li a { display: block; padding: 0.3rem 0; font-size: 0.875rem; line-height: 1.4; color: var(--text-muted);
  text-decoration: none; }
.kb .kb-toc li a:hover, .kb .kb-levellist li a:hover { color: var(--red-text); }
.kb .kb-levellist { counter-reset: kb; }
.kb .kb-levellist li { counter-increment: kb; }
.kb .kb-levellist li a::before { content: counter(kb, decimal-leading-zero); display: inline-block; width: 1.75rem; font-family: var(--kb-mono);
  font-size: 0.75rem; color: var(--text-muted); }
.kb .kb-levellist li.is-current a { color: var(--text); font-weight: 700; }
.kb .kb-levellist li.is-current a::before { color: var(--red-text); }
.kb .kb-side__all { display: inline-block; margin-top: 0.75rem; font-size: 0.8125rem; font-weight: 700; color: var(--red-text); text-decoration: none; }

/* ============================================================
   Collapsible parts (hub levels, "How to use"). Open on desktop,
   where the summary is just a heading; on phones the summary is a
   tappable row with a chevron (the hub script collapses them).
   ============================================================ */
.kb details > summary { list-style: none; }
.kb details > summary::-webkit-details-marker { display: none; }
.kb .kb-howto > summary h2 { display: inline; }

/* Level chips: phones and tablets only, stuck under the site nav. */
.kb .kb-levelnav { display: none; }

/* Compact bar under a concept's title: phones and tablets only. */
.kb .kb-mbar { display: none; }

@media (max-width: 979px) {
  .kb .kb-map { display: none; }
  .kb .kb-hubhero { padding-bottom: 2rem; }

  .kb .kb-levelnav { display: block; position: sticky; top: calc(4rem + 1px); z-index: 50;
    background: var(--bg); border-bottom: 1px solid var(--border); }
  .kb .kb-levelnav__inner { display: flex; gap: 0.5rem; overflow-x: auto; padding-top: 0.6rem; padding-bottom: 0.6rem;
    scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .kb .kb-levelnav__inner::-webkit-scrollbar { display: none; }
  /* Fade the right edge so it's clear more levels scroll into view. */
  .kb .kb-levelnav__inner { -webkit-mask-image: linear-gradient(to right, #000 85%, transparent); mask-image: linear-gradient(to right, #000 85%, transparent); }
  .kb .kb-levelnav__chip { flex: none; display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.4rem 0.8rem;
    border: 1px solid var(--border); border-radius: 999px; background: var(--surface); font-size: 0.8125rem; font-weight: 600;
    color: var(--text); text-decoration: none; white-space: nowrap; }
  .kb .kb-levelnav__chip span { font-family: var(--kb-mono); font-size: 0.75rem; color: var(--red-text); }

  .kb .kb-hubbody { padding-top: 1.5rem; }
  .kb details.kb-levelsec { display: block; padding: 0; border-top: 0; margin-bottom: 0.75rem;
    border: 1px solid var(--border); border-radius: 0.75rem; background: var(--surface);
    scroll-margin-top: calc(4rem + 3.6rem); }
  .kb details.kb-levelsec > summary { position: relative; display: block; padding: 1rem 3rem 1rem 1.1rem; cursor: pointer; }
  .kb details.kb-levelsec > summary::after, .kb details.kb-howto > summary::after {
    content: ""; position: absolute; right: 1.2rem; top: 1.45rem; width: 0.55rem; height: 0.55rem;
    border-right: 2px solid var(--text-muted); border-bottom: 2px solid var(--text-muted); transform: rotate(45deg); transition: transform .15s; }
  .kb details[open].kb-levelsec > summary::after, .kb details[open].kb-howto > summary::after { transform: rotate(-135deg); top: 1.7rem; }
  .kb .kb-levelsec__num { margin-bottom: 0.15rem; font-size: 0.75rem; }
  .kb .kb-levelsec__head h2 { font-size: 1.25rem; margin-bottom: 0.2rem; }
  .kb .kb-levelsec__aud { margin: 0; font-size: 0.8125rem; }
  .kb .kb-levelsec__sum { display: none; margin-top: 0.6rem; font-size: 0.875rem; }
  .kb details[open].kb-levelsec .kb-levelsec__sum { display: block; }
  .kb details.kb-levelsec .kb-steps { padding: 0 0.6rem 0.6rem; border-top: 1px solid var(--border); }
  .kb .kb-steps::before { display: none; }
  .kb .kb-step + .kb-step { border-top: 1px solid var(--border); }
  .kb .kb-step__link { grid-template-columns: 1.9rem 1fr; column-gap: 0.75rem; padding: 0.75rem 0.4rem; }
  .kb .kb-step__num { width: 1.9rem; height: 1.9rem; font-size: 0.6875rem; border-width: 1.5px; }
  .kb .kb-step__title { font-size: 0.975rem; }
  .kb .kb-step__desc { display: none; }
  .kb .kb-step__meta { font-size: 0.6875rem; }

  .kb details.kb-howto { position: relative; margin-bottom: 1.5rem; border: 1px solid var(--border); border-radius: 0.75rem; background: var(--muted-bg); }
  .kb details.kb-howto > summary { padding: 0.9rem 3rem 0.9rem 1.1rem; cursor: pointer; }
  .kb details.kb-howto > summary h2 { font-size: 1rem; margin: 0; }
  .kb details.kb-howto > summary::after { top: 1.2rem; }
  .kb details[open].kb-howto > summary::after { top: 1.45rem; }
  .kb details.kb-howto .kb-howto__grid { padding: 0 1rem 1rem; gap: 0.6rem; }
  .kb details.kb-howto .kb-howto__grid p { padding: 0; border: 0; background: none; }
  .kb .kb-faq--hub { padding-top: 1.5rem; border-top: 0; }
}

/* Below the desktop breakpoint the side rail is replaced by .kb-mbar at the top. */
@media (max-width: 1099px) {
  .kb .kb-side { display: none; }
  .kb .kb-layout { gap: 0; }
  .kb .kb-mbar { display: block; margin: 0 0 1.5rem; padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: 0.75rem; background: var(--surface); }
  .kb .kb-mbar__row { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
  .kb .kb-mbar__level { font-size: 0.8125rem; font-weight: 700; color: var(--text); text-decoration: none; }
  .kb .kb-mbar__level:hover { color: var(--red-text); }
  .kb .kb-mbar__pos { font-family: var(--kb-mono); font-size: 0.75rem; color: var(--text-muted); white-space: nowrap; }
  .kb .kb-mbar__progress { display: block; width: 100%; height: 4px; margin: 0.5rem 0 0.25rem; border: 0; border-radius: 999px;
    background: var(--kb-track); color: var(--red); appearance: none; -webkit-appearance: none; overflow: hidden; }
  .kb .kb-mbar__progress::-webkit-progress-bar { background: var(--kb-track); border-radius: 999px; }
  .kb .kb-mbar__progress::-webkit-progress-value { background: var(--red); border-radius: 999px; }
  .kb .kb-mbar__progress::-moz-progress-bar { background: var(--red); border-radius: 999px; }
  .kb .kb-mbar__toc { margin-top: 0.4rem; border-top: 1px solid var(--border); }
  .kb .kb-mbar__toc > summary { position: relative; padding: 0.6rem 2rem 0.1rem 0; font-size: 0.8125rem; font-weight: 700; color: var(--text); cursor: pointer; }
  .kb .kb-mbar__toc > summary::after { content: ""; position: absolute; right: 0.3rem; top: 0.85rem; width: 0.45rem; height: 0.45rem;
    border-right: 2px solid var(--text-muted); border-bottom: 2px solid var(--text-muted); transform: rotate(45deg); }
  .kb .kb-mbar__toc[open] > summary::after { transform: rotate(-135deg); top: 1.05rem; }
  .kb .kb-mbar__toc .kb-toc { margin-top: 0.4rem; }
  .kb .kb-mbar__toc .kb-toc li a { padding: 0.45rem 0; font-size: 0.9rem; }

  /* Previous/next: two full-width cards, next first. */
  .kb .kb-pathnav { flex-direction: column; gap: 0.6rem; }
  .kb .kb-pathnav a { max-width: none; width: 100%; margin: 0; padding: 0.85rem 1rem; text-align: left;
    border: 1px solid var(--border); border-radius: 0.75rem; background: var(--surface); color: var(--text); }
  .kb .kb-pathnav a.next { order: -1; text-align: left; border-color: var(--red); }
}

/* Tables become one card per row on phones; each cell shows its column header. */
@media (max-width: 639px) {
  .kb .kb-body .table-scroll { overflow: visible; margin-left: 0; margin-right: 0; }
  .kb .kb-body .stride-table, .kb .kb-body .stride-table tbody, .kb .kb-body .stride-table tr { display: block; width: 100%; }
  .kb .kb-body .stride-table thead { display: none; }
  .kb .kb-body .stride-table tr { margin-bottom: 0.75rem; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
  .kb .kb-body .stride-table td { display: grid; grid-template-columns: minmax(5.5rem, 36%) 1fr; gap: 0.75rem;
    padding: 0.5rem 0.85rem; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
  .kb .kb-body .stride-table td::before { content: attr(data-label); font-weight: 700; font-size: 0.8125rem; color: var(--text-muted); }
  .kb .kb-body .stride-table td:first-child { display: block; background: var(--muted-bg); font-weight: 700; }
  .kb .kb-body .stride-table td:first-child::before { display: none; }
  .kb .kb-body .stride-table tr td:last-child { border-bottom: 0; }
  .kb .kb-body .stride-table td:empty { display: none; }
}
@media (max-width: 640px) {
  .kb .kb-hubhero { padding-top: 2.25rem; }
  .kb .kb-def, .kb .kb-example, .kb .kb-takeaways { padding-left: 1.1rem; padding-right: 1.1rem; }
  .kb .kb-level__sep { display: none; }
  .kb .kb-level__aud { flex-basis: 100%; padding-left: 2.35rem; margin-top: -0.35rem; font-weight: 600; color: var(--text-muted); }
}