.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--t-base), color var(--t-base),
              border-color var(--t-base), transform var(--t-base);
}

.btn--sm { padding: 10px 20px; font-size: 12px; }
.btn--md { padding: 12px 24px; }
.btn--lg { padding: 15px 26px; }

.btn--solid {
  background: var(--ink);
  color: var(--inverse);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--on-ink {
  background: var(--inverse);
  color: var(--ink);
}

.btn:hover { transform: var(--lift); }
.btn--ghost:hover { border-color: var(--ink); }

.btn--no-lift:hover { transform: none; }

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  flex: none;
  display: inline-block;
  vertical-align: -0.15em;
  width: 1.25em;
  height: 1.25em;
}

.icon--lg { width: 18px; height: 18px; }

.text-link .icon { width: 14px; height: 14px; }

.tag .icon { width: 14px; height: 14px; margin-inline-end: 8px; }

/* Inline link inside prose — the same underline role as every other text link
   in the system (--line-control), so it reads as a link without colouring it. */
.link { border-block-end: 1px solid var(--line-control); }
.link:hover { color: var(--ink); border-block-end-color: var(--ink); }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;

  padding-block: 6px 4px;
  margin-block-start: -6px;
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  color: var(--muted);
  border-block-end: 1px solid var(--line-control);
}

.text-link:hover { color: var(--ink); border-block-end-color: var(--ink); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--muted);
  transition: background var(--t-fast), color var(--t-fast);
}

.icon-btn:hover { background: var(--line); color: var(--ink); }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 15px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-pill);
  font-size: var(--fs-label-xs);
  font-weight: 600;
  letter-spacing: var(--ls-tag);
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: background var(--t-base), color var(--t-base), border-color var(--t-base);
}

.tag.on {
  background: var(--ink);
  color: var(--inverse);
  border-color: var(--ink);
}

.tag.soon {
  color: var(--muted);
  border-color: var(--line);
}

button.tag { cursor: pointer; }
button.tag:hover:not(.on) { border-color: var(--line-strong); color: var(--ink); }

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.input {
  width: 100%;
  padding: 15px 22px;
  background: var(--surface);
  border: 1px solid var(--line-control);
  border-radius: var(--radius-pill);
  font-size: var(--fs-body);
  line-height: 1;
  color: var(--ink);
  transition: border-color var(--t-base), background var(--t-theme);
}

.input:focus { outline: none; border-color: var(--ink); }
.input:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.news-input-row {
  display: flex;
  gap: 10px;
  max-width: 480px;
}

.news-input-row .input { flex: 1; }

.news-input-row[hidden] { display: none; }

.news-status {
  margin-block-start: 12px;
  font-size: var(--fs-body);
  color: var(--ink);
}

.news-status:empty { display: none; }

.news-note {
  margin-block-start: 14px;
  font-size: var(--fs-meta);
  color: var(--muted);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 30px 30px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--t-base), transform var(--t-base),
              box-shadow var(--t-base), background var(--t-theme);
}

.card--project { padding: clamp(28px, 4vw, 34px); }

a.card:hover,
.card--interactive:hover {
  transform: var(--lift);
  box-shadow: var(--shadow-hover);
}

.card__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-card-title);
  line-height: 1.3;
}

.card__text {
  font-size: var(--fs-body-sm);
  line-height: 1.7;
  color: var(--ink-soft);
}

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--inverse);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 16px;
}

.avatar--sm { width: 30px; height: 30px; font-size: 13px; }

.meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  font-size: var(--fs-meta);
  color: var(--muted);
}

.meta__dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--dimmer);
}

.stat-band {
  display: flex;
  align-items: stretch;
  border-block: 1px solid var(--line);
}

.stat-band--narrow {
  max-width: 640px;
  margin-inline: auto;
}

.stat-band--lg .stat-band__cell { padding: 26px 8px; }
.stat-band--lg .stat-band__value { font-size: var(--fs-stat); }

.stat-band__cell {
  flex: 1;
  padding: 20px 8px;
  text-align: center;
}

.stat-band__cell + .stat-band__cell { border-inline-start: 1px solid var(--line); }

.stat-band__value {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-stat-sm);
  line-height: 1.1;
}

.stat-band__value--em { font-style: italic; }

.stat-band__label {
  margin-block-start: 7px;
  font-size: var(--fs-label-sm);
  font-weight: 600;
  letter-spacing: var(--ls-block);
  text-transform: uppercase;
  color: var(--muted);
}

.card[hidden] { display: none; }

.card--item { padding: 28px 28px 24px; gap: 14px; }

.item-card__logo { display: block; align-self: flex-start; inline-size: auto; block-size: 44px; }

.item-card__head,
.item-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.item-card__head {
  align-items: baseline;
  padding-block-end: 13px;
  border-block-end: 1px solid var(--line);
}

.item-card__type {
  font-size: var(--fs-label-sm);
  font-weight: 600;
  letter-spacing: var(--ls-block);
  text-transform: uppercase;
  color: var(--muted);
}

.item-card__version {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-num);
  font-weight: 500;
  color: var(--muted);
}

.card--item .card__text { flex: 1; }

.item-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: var(--fs-meta);
  color: var(--muted);
}

.item-card__foot { margin-block-start: auto; }

.callout {
  padding: 32px 36px;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.callout__text {
  margin-block-start: 16px;
  font-size: var(--fs-article-body);
  line-height: 1.75;
  color: var(--ink-body);
}

.callout__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-block-start: 18px;
  padding-block-start: 18px;
  border-block-start: 1px solid var(--line);
}

.callout__item {
  padding-inline-start: 24px;
  font-size: var(--fs-body-sm);
  line-height: 1.65;
  color: var(--ink-soft);
}

.callout__item::before {
  content: "—";
  float: inline-start;
  margin-inline-start: -24px;
  color: var(--faint);
}

.code-block {
  overflow: hidden;
  background: var(--surface-ink);
  border-radius: var(--radius);
}

.code-block__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 26px;
  border-block-end: 1px solid var(--line-on-ink);
  font-size: var(--fs-label-sm);
  font-weight: 600;
  letter-spacing: var(--ls-block);
  text-transform: uppercase;
  color: var(--code-cm);
}

.code-block pre {
  margin: 0;
  padding: 24px 26px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-code);
  line-height: 1.75;
  color: var(--inverse-soft);
  white-space: pre-wrap;
}

.tok-kw { color: var(--code-kw); }
.tok-cm { color: var(--code-cm); }

.install {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  background: var(--surface-ink-deep);
  border: 1px solid var(--line-on-ink);
  border-radius: var(--radius-install);
  font-family: var(--font-mono);
  font-size: var(--fs-code-inline);
  line-height: 1.6;
  color: var(--inverse-soft);
}

.install__prompt { color: var(--code-cm); }

.install__copy {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-block: -4px;
  background: none;
  border: 0;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--faint);
  cursor: pointer;
  transition: color var(--t-fast);
}

.install__copy:hover { color: var(--inverse-soft); }

.pull-quote {
  margin-block-start: clamp(44px, 3.61vw, 52px);
  padding-block: clamp(6px, 0.56vw, 8px);
  padding-inline-start: clamp(22px, 2.22vw, 32px);
  border-inline-start: 2px solid var(--ink);
}

.pull-quote blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: var(--fs-quote);
  line-height: 1.5;
  color: var(--ink-body);
}

.pull-quote figcaption { margin-block-start: 14px; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-block);
  text-transform: uppercase;
}

.breadcrumb a {
  padding-block: 8px 2px;
  margin-block-start: -8px;
  color: var(--muted);
  border-block-end: 1px solid var(--line-control);
}

.breadcrumb a:hover { color: var(--ink); border-block-end-color: var(--ink); }
.breadcrumb__sep { color: var(--faint); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

.lesson-body {
  display: grid;
  grid-template-columns: 230px minmax(0, var(--measure));
  gap: 84px;
  justify-content: center;
  padding-block-start: clamp(48px, 5.56vw, 80px);
}

.lesson-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
  max-height: calc(100svh - var(--header-h) - 48px);
  overflow-y: auto;

  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.lesson-sidebar > * + * {
  margin-block-start: 28px;
  padding-block-start: 24px;
  border-block-start: 1px solid var(--line);
}

.sidebar-block__title { margin-block-end: 14px; }

@media (max-width: 1000px) {
  .lesson-body {
    grid-template-columns: minmax(0, var(--measure));
    gap: 48px;
  }
  .lesson-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
  }
}

.toc__title { margin-block-end: 18px; }

.toc__link {
  display: block;
  padding: 6px 0 6px 16px;
  border-inline-start: 1px solid var(--line);
  font-size: var(--fs-body);
  line-height: 1.5;

  color: var(--muted);
}

.toc__link.is-active {
  border-inline-start-color: var(--ink);
  color: var(--ink);
  font-weight: 500;
}

.row-link {
  display: block;
  transition: background var(--t-fast), transform var(--t-base), box-shadow var(--t-base);
}

.row-link--lift:hover { transform: var(--lift); box-shadow: var(--shadow-hover); }

.page-hero { padding-block-start: clamp(56px, 6.67vw, 96px); }

.page-hero__eyebrow { margin-block-end: clamp(18px, 1.67vw, 24px); }

.page-hero__title {
  font-size: var(--fs-page-title);
  line-height: 1.1;
}

.page-hero__lede {
  max-width: 560px;
  margin-block-start: clamp(20px, 1.94vw, 28px);
  color: var(--muted);
}

.page-hero--center { text-align: center; }
.page-hero--center .page-hero__lede {
  max-width: 520px;
  margin-inline: auto;
}

.group-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: clamp(36px, 3.06vw, 44px) 8px 16px;
  border-block-end: 1px solid var(--line-mid);
}

.group-head__title {
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--ink-soft);
}

.group-head__count {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-row);
  font-weight: 500;
  white-space: nowrap;
  color: var(--muted);
}

.lesson-row {
  display: grid;
  grid-template-columns: 70px 1fr minmax(90px, max-content) 40px;
  gap: 24px;
  align-items: baseline;
  padding: 26px 8px;
  border-block-end: 1px solid var(--line);
}

a.lesson-row:hover { background: var(--surface); }

.lesson-row__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-row);
  font-weight: 500;
  color: var(--dim);
}

.lesson-row__title {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-row-title);
  line-height: 1.3;
}

.lesson-row__text {
  display: block;
  max-width: 640px;
  margin-block-start: 8px;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--muted);
}

.lesson-row__meta {
  font-size: var(--fs-meta);
  color: var(--muted);
  text-align: end;
}

.lesson-row__go {
  color: var(--muted);
  text-align: end;
  justify-self: end;
}

.roadmap-row .lesson-row__title {
  font-style: italic;
  font-weight: 400;

  color: var(--muted);
}

.roadmap-row .lesson-row__num { color: var(--dimmer); }

.roadmap-row .text-link { justify-self: end; }

.ink-band {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  margin-block-start: 100px;
  padding: 40px 44px;
  background: var(--surface-ink);

  color: var(--inverse-soft);
  border-radius: var(--radius);
}

.ink-band__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-featured-title);
  line-height: 1.25;
}

.ink-band__text {
  margin-block-start: 10px;
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--faint);
}

.ink-band .btn { flex: none; }

.contact { text-align: center; }

.contact__eyebrow {
  justify-content: center;
  margin-block-end: 24px;
}

.contact__title {
  font-size: var(--fs-contact-title);
  line-height: 1.15;
}

.contact__lede {
  max-width: 480px;
  margin: 26px auto 0;
  font-size: var(--fs-body);
  color: var(--muted);
}

.contact__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-block-start: 38px;
}

.contact__socials { display: contents; }

.contact__social { border-color: var(--line-control); }

.contact__news {
  max-width: 480px;
  margin: clamp(40px, 3.9vw, 56px) auto 0;
  padding-block-start: clamp(32px, 3.06vw, 44px);
  border-block-start: 1px solid var(--line);
}

.contact__news-text {
  margin-block-end: 20px;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--muted);
}

.carousel {
  display: flex;
  gap: 48px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
}

.carousel::-webkit-scrollbar { display: none; }

.carousel > * {
  flex: 0 0 100%;
  scroll-snap-align: start;
  min-width: 0;
}

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

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-block-start: clamp(34px, 3.47vw, 50px);
}

.carousel-arrows {
  display: flex;
  align-items: center;
  gap: 12px;
}

.carousel-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--ink);
  transition: background var(--t-base), color var(--t-base),
              border-color var(--t-base), transform var(--t-base), opacity var(--t-base);
}

.carousel-arrow:hover:not(:disabled) {
  background: var(--ink);
  color: var(--inverse);
  border-color: var(--ink);
  transform: var(--lift);
}

.carousel-arrow:disabled { opacity: 0.28; cursor: default; }

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 16px;
}

.carousel-dot {

  width: 24px;
  height: 24px;
  padding: 8px;
  margin: -8px;
  border-radius: 50%;
  background: var(--line-strong);
  background-clip: content-box;
  transition: background var(--t-base), transform var(--t-base);
}

.carousel-dot.is-active {
  background-color: var(--ink);
}

.prevnext {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding-block-start: 30px;
  border-block-start: 1px solid var(--line);
}

.prevnext__dir {
  font-size: var(--fs-label-sm);
  font-weight: 600;
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  color: var(--muted);
}

.prevnext__dir .icon { width: 14px; height: 14px; }

.prevnext__title {
  margin-block-start: 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-card-title);
}

.prevnext__item--end .prevnext__title { color: var(--muted); }
.prevnext__item:last-child { text-align: end; }

.share { position: relative; }

.share__trigger {
  display: inline-flex;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--inverse);
  font-size: 11.5px;
  font-weight: 500;
}

.share__menu {
  position: absolute;
  inset-block-end: calc(100% + 12px);
  z-index: var(--z-popover);
  width: 212px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-popover);
}

.share__menu[hidden] { display: none; }

.share__item {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-control);
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--ink);
  transition: background var(--t-fast);
}

.share__item:hover { background: var(--bg); }

.share__glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line-control);
  border-radius: 50%;
  font-size: var(--fs-label);
  font-weight: 600;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  z-index: calc(var(--z-header) + 1);
  padding: 12px 24px;
  background: var(--ink);
  color: var(--inverse);
  border-radius: var(--radius-pill);
  font-size: var(--fs-body);
  transform: translate(-50%, 12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base), transform var(--t-base);
}

.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding-block-start: 48px;
  border-block-start: 1px solid var(--line);
}

.cta-band__title { font-size: var(--fs-h3); line-height: 1.2; }

.cta-band__text {
  max-width: 480px;
  margin-block-start: 12px;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--muted);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-lang);
}

.lang-switch__sep { color: var(--muted); }

.lang-switch a {
  padding: 6px;
  margin: -6px;
  color: var(--muted);
}
.lang-switch a[aria-current="true"] { color: var(--ink); }
.lang-switch a:hover { color: var(--ink); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--muted);
  transition: background var(--t-fast), color var(--t-fast);
}

.theme-toggle:hover { background: var(--line); color: var(--ink); }

.theme-toggle .icon--sun { display: none; }
[data-theme="dark"] .theme-toggle .icon--sun { display: block; }
[data-theme="dark"] .theme-toggle .icon--moon { display: none; }

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-control);
}

.menu-toggle__bar {
  width: 20px;
  height: 1.5px;
  margin-inline: auto;
  background: var(--ink);
  transition: transform var(--t-menu), opacity var(--t-menu);
}

.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(1) {
  transform: translateY(3.25px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] .menu-toggle__bar:nth-child(2) {
  transform: translateY(-3.25px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  padding: 8px var(--pad) 40px;
  background: var(--bg);
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-menu), visibility var(--t-menu);
}

.mobile-nav.is-open { opacity: 1; visibility: visible; }

.mobile-nav__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-block-end: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 30px;
}

.mobile-nav__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-num);
  font-weight: 500;
  color: var(--dim);
}

.mobile-nav__lang { margin-block-start: 28px; }

.mobile-nav__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-block-start: 24px;
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--ls-nav);
  text-transform: uppercase;
  color: var(--muted);
}

.mobile-nav__foot a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 12px 14px 0;
}

.mobile-nav__foot a:hover { color: var(--ink); }

body.is-locked { overflow: hidden; }

.article-head {
  padding-block-start: clamp(48px, 6.67vw, 96px);
  text-align: center;
}

.article-head .breadcrumb { justify-content: center; }

.article-logo {
  display: block;
  inline-size: auto;
  block-size: 64px;
  margin: clamp(28px, 2.78vw, 40px) auto 0;
}

.article-title {
  margin-block-start: clamp(20px, 1.94vw, 28px);
  font-size: var(--fs-article-title);
  line-height: 1.18;
  letter-spacing: var(--ls-display);
}

.article-title__em {
  font-style: italic;
  font-weight: 400;
  color: var(--faint);
}

.article-meta {
  justify-content: center;
  margin-block-start: clamp(20px, 2.08vw, 30px);
}

.article-author {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-block-start: clamp(18px, 1.81vw, 26px);
  font-size: var(--fs-body);
  color: var(--ink-soft);
}

.article-author__name { border-block-end: 1px solid var(--line-control); }

a.article-author__name:hover { color: var(--ink); border-color: var(--ink); }

.article > p,
.tech-panel > p {
  margin-block-start: 24px;
  font-size: var(--fs-article-body);
  line-height: 1.85;
  color: var(--ink-body);
}

.article > p:first-child { margin-block-start: 0; }

.article > .callout,
.article > .code-block,
.article > .tech-panel,
.tech-panel > .code-block {
  margin-block-start: 24px;
}

.article > .callout:first-child,
.article > .code-block:first-child {
  margin-block-start: 0;
}

.article strong { font-weight: 600; }

.term {
  padding-block-end: 1px;
  border-block-end: 1px dotted var(--line-strong);
}

.drop-cap {
  float: inline-start;
  padding: 10px 12px 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-drop-cap);
  line-height: 0.8;
}

.h-num {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-block-start: 64px;
}

.h-num__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-row);
  font-weight: 500;
  color: var(--dim);
}

.h-num__title {
  font-size: var(--fs-h3);
  line-height: 1.25;
}

.h-num__em,
.heading-em {
  font-style: italic;
  font-weight: 400;
  color: var(--muted);
}

.article-sub {
  margin-block-start: 40px;
  font-size: var(--fs-card-title);
  line-height: 1.3;
}

@media (max-width: 760px) {
  .article-sub { margin-block-start: 32px; }
}

.anatomy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-block-start: 32px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.anatomy__cell {
  padding: 24px 28px;
  background: var(--surface);
}

.anatomy__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.anatomy__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-card-title);
}

.anatomy__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-num);
  font-weight: 500;
  color: var(--dimmer);
}

.anatomy__text {
  margin-block-start: 10px;
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--muted);
}

.faq {
  margin-block-start: 64px;
  padding-block-start: 60px;
  border-block-start: 1px solid var(--line);
}

.faq__title {
  margin-block-start: 18px;
  font-size: var(--fs-h3);
  line-height: 1.25;
}

.faq__list {
  margin-block-start: 38px;
  border-block-start: 1px solid var(--line-mid);
}

.faq-row { border-block-end: 1px solid var(--line); }

.faq-row__q {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  width: 100%;
  padding: 28px 0;
  text-align: start;
  background: none;
  border: 0;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-card-title);
  line-height: 1.4;
  color: var(--ink);
}

.faq-row__glyph {
  flex: none;
  font-weight: 300;
  font-size: 20px;
  line-height: 1;
  color: var(--faint);
}

.faq-row__q[aria-expanded="true"] .faq-row__glyph-plus,
.faq-row__q[aria-expanded="false"] .faq-row__glyph-minus { display: none; }

.faq-row__a {
  max-width: 580px;
  margin-block: -14px 28px;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--ink-soft);
}

.faq-row__a[hidden] { display: none; }

@media (max-width: 760px) {
  .h-num { margin-block-start: 48px; }
  .anatomy { grid-template-columns: 1fr; }
  .faq { margin-block-start: 48px; padding-block-start: 44px; }
}

@media (max-width: 900px) {
  .menu-toggle { display: inline-flex; }
}

@media (max-width: 760px) {

  .carousel { gap: 28px; }

  .prevnext { grid-template-columns: 1fr; gap: 24px; }
  .prevnext__item:last-child { text-align: start; }
  .cta-band { flex-direction: column; align-items: flex-start; gap: 28px; }

  .pill-row--scroll {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    scrollbar-width: none;
  }
  .pill-row--scroll::-webkit-scrollbar { display: none; }
  .pill-row--scroll > * { flex: none; scroll-snap-align: start; }

  .lesson-row {
    grid-template-columns: 40px 1fr auto;
    gap: 0 16px;
    padding: 22px 4px;
  }

  .lesson-row__num  { grid-area: 1 / 1 / 2 / 2; }
  .lesson-row__body { grid-area: 1 / 2 / 2 / 4; }
  .lesson-row__meta { grid-area: 2 / 2 / 3 / 3; text-align: start; }
  .lesson-row__go   { grid-area: 2 / 3 / 3 / 4; }

  .lesson-row__meta,
  .lesson-row__go,
  .roadmap-row .text-link { margin-block-start: 10px; }

  .roadmap-row .text-link {
    grid-area: 2 / 2 / 3 / 3;
    justify-self: start;
  }

  .ink-band {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    margin-block-start: 72px;
    padding: 32px 28px;
  }
}

@media (max-width: 520px) {

  .stat-band { flex-direction: column; }
  .stat-band__cell + .stat-band__cell {
    border-inline-start: 0;
    border-block-start: 1px solid var(--line);
  }

  .news-input-row { flex-direction: column; }
  .news-input-row .btn { width: 100%; }
  .cta-band__text { max-width: none; }

  .contact__actions {
    flex-direction: column;
    align-items: stretch;
    margin-block-start: 30px;
  }
  .contact__actions .btn--md { width: 100%; }

  .contact__socials {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-block-start: 24px;
  }

  .contact__social {
    padding: 14px 4px;
    margin: -14px -4px;
    border: 0;
    border-radius: 0;
    font-size: var(--fs-label);
    font-weight: 600;
    letter-spacing: var(--ls-nav);
    text-transform: uppercase;
    color: var(--muted);
  }

  .contact__social:hover { color: var(--ink); transform: none; }
  .ink-band .btn { width: 100%; text-align: center; }
}