.tab-switcher {
  display: inline-flex;
  max-width: 100%;
  gap: 4px;
  padding: 4px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink);
  scrollbar-width: none;
}

.tab-switcher::-webkit-scrollbar {
  display: none;
}

.tab-switcher [role="tab"] {
  flex-shrink: 0;
  min-height: 42px;
  padding: 8px 18px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-muted);
  cursor: pointer;
}

.tab-switcher [role="tab"]:hover {
  color: var(--color-ink);
}

.tab-switcher [role="tab"][aria-selected="true"],
.tab-switcher [role="tab"].is-active {
  background: var(--color-canvas);
  color: var(--color-brand);
  box-shadow: var(--shadow-back);
}

[role="tabpanel"][hidden] {
  display: none;
}

.section--dark .tab-switcher {
  border-color: var(--color-dark-line);
  background: var(--color-dark-cell);
  color: var(--color-white);
}

.section--dark .tab-switcher [role="tab"] {
  color: var(--color-dark-muted);
}

.section--dark .tab-switcher [role="tab"][aria-selected="true"],
.section--dark .tab-switcher [role="tab"].is-active {
  background: var(--color-canvas);
  color: var(--color-brand);
}

.feature-tabs {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.35fr);
  gap: clamp(34px, 6vw, 76px);
  align-items: center;
}

.feature-tabs__list {
  display: grid;
  gap: 8px;
}

.feature-tabs__tab {
  position: relative;
  width: 100%;
  padding: 20px 22px;
  border: 0;
  border-radius: var(--radius-card);
  background: transparent;
  color: var(--color-dark-muted);
  text-align: left;
  cursor: pointer;
}

.feature-tabs__tab strong {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--color-white);
  font-size: 20px;
  font-weight: 400;
}

.feature-tabs__tab p {
  margin: 8px 0 0 19px;
  font-size: 14px;
}

.feature-tabs__tab[aria-selected="true"] {
  background: var(--color-dark-cell);
}

.feature-tabs__tab[aria-selected="true"]::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: var(--gradient-line);
  pointer-events: none;
  -webkit-mask: linear-gradient(var(--color-ink) 0 0) content-box, linear-gradient(var(--color-ink) 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.feature-tabs__panel {
  position: relative;
  min-height: 420px;
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--radius-card-large);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-front);
}

.feature-tabs__panel p {
  color: var(--color-ink-muted);
}

.feature-tabs__caption {
  position: absolute;
  right: 22px;
  bottom: 18px;
  left: 22px;
  padding: 10px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-ink-muted);
  font-size: 13px;
  text-align: center;
  box-shadow: var(--shadow-back);
}

.toc {
  position: sticky;
  top: 18px;
  z-index: 8;
  display: flex;
  max-width: 100%;
  gap: 8px;
  margin-bottom: 36px;
  padding: 8px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-inner);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-back);
  scrollbar-width: thin;
}

.toc a {
  flex-shrink: 0;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-muted);
  font-size: 13px;
  text-decoration: none;
}

.toc a:hover,
.toc a.is-current {
  background: var(--color-brand-soft);
  color: var(--color-brand);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
}

.faq-item summary {
  position: relative;
  padding: 20px 56px 20px 22px;
  color: var(--color-ink);
  font-size: 17px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 16px;
  right: 20px;
  color: var(--color-brand);
  font-size: 24px;
  font-weight: 300;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item__answer {
  padding: 0 22px 22px;
  color: var(--color-ink-muted);
}

.term-grid,
.article-grid,
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.term-card,
.article-card,
.download-card {
  position: relative;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-canvas);
  color: var(--color-ink);
  transition: transform var(--transition-main), box-shadow var(--transition-main), border-color var(--transition-main);
}

.term-card:hover,
.article-card:hover,
.download-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-line-strong);
  box-shadow: var(--shadow-card);
}

.term-card {
  padding: 24px;
}

.term-card__name {
  margin-bottom: 8px;
  color: var(--color-brand);
  font-family: var(--font-mono);
  font-size: 17px;
}

.term-card p {
  margin-bottom: 0;
  color: var(--color-ink-muted);
}

.article-card {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 26px;
  text-decoration: none;
}

.article-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--color-ink-muted);
  font-size: 13px;
}

.article-card h3 {
  margin: 18px 0 12px;
  font-size: 23px;
}

.article-card p {
  color: var(--color-ink-muted);
}

.article-card__more {
  margin-top: auto;
  color: var(--color-brand);
  font-size: 14px;
}

.download-card {
  padding: 26px;
}

.download-card__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.download-card__icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

.download-card__title {
  margin-bottom: 4px;
  font-size: 25px;
}

.download-card__version {
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.download-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.badge {
  display: inline-flex;
  min-height: 28px;
  max-width: 100%;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-ink-muted);
  font-size: 12px;
  line-height: 1.35;
  white-space: nowrap;
}

.badge::before {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-dot);
  content: "";
}

.badge--primary {
  border-color: var(--color-brand);
  color: var(--color-brand);
}

.badge--primary::before {
  background: var(--color-brand);
}

.badge--featured {
  border-color: var(--color-coral);
  color: var(--color-brand-deep);
}

.badge--featured::before {
  background: var(--color-coral);
}

.badge--recommended {
  border-color: var(--color-positive);
  color: var(--color-ink);
}

.badge--recommended::before {
  background: var(--color-positive);
}

.badge--retired {
  background: var(--color-panel);
  color: var(--color-ink-muted);
}

.callout {
  position: relative;
  padding: 20px 22px 20px 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-inner);
  background: var(--color-panel);
  color: var(--color-ink);
}

.callout::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 0;
  width: 4px;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--color-brand);
  content: "";
}

.callout--warning::before {
  background: var(--color-caution);
}

.callout--success::before {
  background: var(--color-positive);
}

.callout strong {
  color: var(--color-ink);
}

.callout p:last-child {
  margin-bottom: 0;
}

.table-scroll,
.prose > .data-table {
  display: block;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-scroll table,
.prose > .data-table {
  min-width: 640px;
}

.download-guide-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  margin-top: 48px;
  padding: 28px;
  border-radius: var(--radius-card);
  background: var(--color-panel-deep);
  color: var(--color-white);
}

.download-guide-card h2,
.download-guide-card h3 {
  margin-bottom: 8px;
  color: var(--color-white);
}

.download-guide-card p {
  margin-bottom: 0;
  color: var(--color-dark-muted);
}

.dl-fab {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 80;
  display: inline-flex;
  min-height: 48px;
  max-width: calc(100vw - 32px);
  align-items: center;
  gap: 9px;
  padding: 9px 20px 9px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-brand);
  box-shadow: var(--shadow-fab);
  font-size: 14px;
  text-decoration: none;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.dl-fab svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.dl-fab:hover {
  transform: translateY(-2px);
  border-color: var(--color-brand);
  color: var(--color-brand-deep);
}

@media (max-width: 820px) {
  .feature-tabs {
    grid-template-columns: 1fr;
  }

  .feature-tabs__list {
    display: grid;
    max-width: 100%;
    padding-bottom: 6px;
  }

  .feature-tabs__tab {
    width: 100%;
  }

  .feature-tabs__panel {
    min-height: 360px;
  }
}

@media (max-width: 700px) {
  .term-grid,
  .article-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .download-guide-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .tab-switcher {
    width: 100%;
  }

  .tab-switcher [role="tab"] {
    padding-inline: 14px;
  }

  .badge-row {
    flex-direction: row;
    align-items: center;
  }

  .faq-item summary {
    padding-left: 18px;
  }

  .feature-tabs__caption {
    position: static;
    margin-top: 24px;
  }

  .dl-fab {
    right: 16px;
    bottom: 16px;
  }
}