.tab-shell {
  display: grid;
  grid-template-columns: minmax(210px, .72fr) minmax(0, 1.6fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
}

.tab-list {
  display: grid;
  gap: 8px;
}

.tab-list[aria-orientation="horizontal"] {
  display: flex;
  flex-wrap: wrap;
}

.tab-button {
  position: relative;
  display: flex;
  width: 100%;
  min-height: 52px;
  align-items: center;
  gap: 11px;
  padding: 11px 16px;
  border-radius: var(--radius-round);
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  font-size: 15px;
  font-weight: 800;
  text-align: left;
}

.tab-button:hover {
  background: var(--color-surface-soft);
}

.tab-button[aria-selected="true"],
.tab-button.is-active {
  background: var(--color-current);
  color: var(--color-on-brand);
}

.tab-check {
  display: inline-grid;
  width: 25px;
  height: 25px;
  flex-shrink: 0;
  place-items: center;
  border: 1.5px solid var(--color-line-strong);
  border-radius: var(--radius-round);
  background: var(--color-surface);
  color: var(--color-brand);
  font-size: 13px;
}

.tab-button[aria-selected="true"] .tab-check,
.tab-button.is-active .tab-check {
  border-color: var(--color-on-brand);
  color: var(--color-current);
}

.tab-panel {
  padding: clamp(24px, 4vw, 42px);
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-hero);
  background: var(--color-surface);
}

.tab-panel[hidden] {
  display: none;
}

.tab-example {
  display: block;
  max-width: 100%;
  margin-top: 22px;
  padding: 13px 16px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-surface-soft);
  color: var(--color-brand-deep);
  font-family: var(--font-code);
  font-size: 13px;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
}

.toc {
  position: sticky;
  z-index: 10;
  top: 10px;
  display: flex;
  max-width: 100%;
  margin-bottom: 44px;
  padding: 9px;
  overflow-x: auto;
  gap: 5px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  background: var(--color-surface);
  -webkit-overflow-scrolling: touch;
}

.toc a {
  display: inline-flex;
  min-height: 38px;
  flex: 0 0 auto;
  align-items: center;
  padding: 7px 14px;
  border-radius: var(--radius-round);
  color: var(--color-ink-soft);
  font-size: 13px;
  font-weight: 750;
  white-space: nowrap;
}

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

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

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

.faq-item[open] {
  border-color: var(--color-line-strong);
}

.faq-question {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 20px;
  cursor: pointer;
  color: var(--color-ink);
  font-weight: 800;
  list-style: none;
}

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

.faq-question::after {
  display: grid;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-round);
  background: var(--color-surface-soft);
  color: var(--color-brand);
  content: "+";
  font-family: var(--font-code);
  font-size: 18px;
}

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

.faq-answer {
  padding: 0 20px 20px;
  color: var(--color-ink-soft);
}

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

.term-card {
  position: relative;
  padding: 26px;
  overflow-x: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.term-card::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--color-brand);
  content: "";
}

.term-card dt {
  margin-bottom: 8px;
  color: var(--color-brand);
  font-family: var(--font-code);
  font-size: 17px;
  font-weight: 750;
}

.term-card dd {
  margin: 0;
  color: var(--color-ink-soft);
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.client-card {
  position: relative;
  display: flex;
  min-height: 100%;
  padding: clamp(24px, 4vw, 34px);
  flex-direction: column;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-hero);
  background: var(--color-surface);
}

.client-card.is-primary {
  border-color: var(--color-brand);
}

.client-card.is-retired {
  background: var(--color-surface-soft);
  color: var(--color-ink-soft);
}

.client-card-head {
  display: flex;
  align-items: center;
  gap: 16px;
}

.client-logo {
  width: 54px;
  height: 54px;
}

.client-card h3 {
  margin-bottom: 3px;
}

.client-meta {
  color: var(--color-ink-soft);
  font-family: var(--font-code);
  font-size: 12px;
}

.client-card-body {
  margin-top: 20px;
  color: var(--color-ink-soft);
}

.client-actions {
  display: flex;
  margin-top: auto;
  padding-top: 22px;
  flex-wrap: wrap;
  gap: 10px;
}

.client-badge {
  position: absolute;
  top: 18px;
  right: 18px;
}

.badge-recommended {
  border-color: var(--color-brand);
  background: var(--color-brand);
  color: var(--color-on-brand);
}

.badge-first {
  border-color: var(--color-current);
  background: var(--color-current);
  color: var(--color-on-brand);
}

.badge-retired {
  border-color: var(--color-negative);
  color: var(--color-negative);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.article-card {
  display: flex;
  min-height: 100%;
  padding: 26px;
  flex-direction: column;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background: var(--color-surface);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.article-card:hover {
  border-color: var(--color-brand);
  transform: translateY(-3px);
}

.article-card-meta {
  display: flex;
  margin-bottom: 15px;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  color: var(--color-ink-soft);
  font-family: var(--font-code);
  font-size: 12px;
}

.article-card h3 {
  font-size: 21px;
}

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

.article-card-link {
  margin-top: auto;
  padding-top: 10px;
  color: var(--color-brand);
  font-weight: 800;
}

.callout {
  position: relative;
  margin: 26px 0;
  padding: 22px 24px 22px 52px;
  overflow-x: clip;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-card);
  background: var(--color-surface-soft);
}

.callout::before {
  position: absolute;
  top: 23px;
  left: 22px;
  width: 14px;
  height: 14px;
  border: 4px solid var(--color-brand);
  border-radius: var(--radius-round);
  content: "";
}

.callout-title {
  margin-bottom: 5px;
  color: var(--color-brand);
  font-weight: 850;
}

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

.dl-fab {
  position: fixed;
  z-index: 45;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  display: flex;
  max-width: calc(100vw - 32px);
  min-height: 54px;
  align-items: center;
  gap: 11px;
  padding: 10px 18px 10px 11px;
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-round);
  background: var(--color-brand);
  color: var(--color-on-brand);
  box-shadow: var(--shadow-float);
  font-weight: 850;
}

.dl-fab:hover {
  background: var(--color-brand-deep);
}

.dl-fab-icon {
  display: grid;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-round);
  background: var(--color-on-brand);
  color: var(--color-brand);
}

.dl-fab-icon svg {
  width: 18px;
  height: 18px;
}

.article-download-card {
  display: grid;
  margin-top: 56px;
  padding: clamp(26px, 5vw, 44px);
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 28px;
  border-radius: var(--radius-hero);
  background: var(--color-brand);
  color: var(--color-on-brand);
}

.article-download-card h2,
.article-download-card p {
  color: var(--color-on-brand);
}

.article-download-card h2 {
  margin-bottom: 8px;
  font-size: clamp(26px, 4vw, 38px);
}

.article-download-card p {
  margin-bottom: 0;
  opacity: .82;
}

.article-download-card .btn {
  border-color: var(--color-on-brand);
  background: var(--color-on-brand);
  color: var(--color-brand);
}

.preview-swatches {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.swatch {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: var(--color-surface);
}

.swatch-color {
  height: 86px;
}

.swatch-color.page {
  background: var(--color-page);
}

.swatch-color.surface {
  background: var(--color-surface);
}

.swatch-color.soft {
  background: var(--color-surface-soft);
}

.swatch-color.line {
  background: var(--color-line);
}

.swatch-color.brand {
  background: var(--color-brand);
}

.swatch-color.deep {
  background: var(--color-brand-deep);
}

.swatch-color.ink {
  background: var(--color-ink);
}

.swatch-color.current {
  background: var(--color-current);
}

.swatch-label {
  display: block;
  padding: 10px 12px;
  color: var(--color-ink-soft);
  font-family: var(--font-code);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.hero {
  max-width: 1040px;
  margin-inline: auto;
  padding: 34px var(--gutter) 0;
  text-align: center;
}

.hero h1 {
  margin-bottom: 0;
  font-size: clamp(52px, 5vw, 58px);
  line-height: 1.14;
}

.hero-sub {
  margin: 18px auto 0;
  max-width: 920px;
  color: var(--color-ink-soft);
  font-size: 18px;
  line-height: 1.6;
}

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

.hero-actions {
  display: flex;
  margin-top: 24px;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-chips {
  display: flex;
  margin-top: 20px;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.setup-stage {
  max-width: 1040px;
  margin: 30px auto 0;
  padding-inline: var(--gutter);
}

.setup-panel {
  max-width: 800px;
  margin-inline: auto;
  overflow: visible;
  border: 1.5px solid var(--color-line-strong);
  border-radius: var(--radius-hero);
  background: var(--color-surface);
  box-shadow: var(--shadow-lift);
}

.setup-bar {
  display: grid;
  padding: 12px 20px;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-radius: var(--radius-hero) var(--radius-hero) 0 0;
  background: var(--color-brand);
}

.setup-dots {
  display: flex;
  gap: 7px;
}

.setup-dots i {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-round);
  background: var(--color-chrome-dot);
}

.setup-title {
  padding: 6px 18px;
  border-radius: var(--radius-round);
  background: var(--color-brand-deep);
  color: var(--color-on-brand);
  font-size: 13.5px;
  font-weight: 750;
  letter-spacing: .04em;
}

.setup-hint {
  justify-self: end;
  color: var(--color-chrome-dot);
  font-family: var(--font-code);
  font-size: 11px;
}

.platform-row {
  display: flex;
  padding: 16px 24px;
  overflow-x: auto;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--color-line);
  -webkit-overflow-scrolling: touch;
}

.platform-label {
  flex-shrink: 0;
  margin-right: 6px;
  color: var(--color-ink-soft);
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: .06em;
}

.platform-link {
  display: inline-flex;
  min-height: 39px;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1.5px solid var(--color-line);
  border-radius: var(--radius-control);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 750;
}

.platform-link svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  color: var(--color-ink-soft);
}

.platform-link:hover {
  border-color: var(--color-line-strong);
  background: var(--color-surface-soft);
}

.platform-link.is-picked {
  border-color: var(--color-current);
  color: var(--color-current);
}

.platform-link.is-picked svg {
  color: var(--color-current);
}

.setting-row {
  position: relative;
  display: grid;
  padding: 13px 24px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--color-line);
}

.setting-row:last-child {
  border-bottom: 0;
}

.setting-row.is-current {
  background: var(--color-current-soft);
}

.setting-icon {
  display: grid;
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-small);
  background: var(--color-surface-soft);
  color: var(--color-brand);
}

.setting-icon svg {
  width: 18px;
  height: 18px;
}

.setting-name {
  display: block;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 800;
}

.setting-hint {
  display: block;
  margin-top: 2px;
  color: var(--color-ink-soft);
  font-size: 12.5px;
}

.setting-value {
  display: flex;
  align-items: center;
  gap: 9px;
}

.mono-chip {
  display: block;
  max-width: 236px;
  padding: 5px 11px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-surface-soft);
  color: var(--color-brand-deep);
  font-family: var(--font-code);
  font-size: 13px;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.done-label {
  color: var(--color-positive);
  font-size: 12px;
  font-weight: 800;
}

.now-badge {
  position: absolute;
  top: 50%;
  left: -13px;
  padding: 4px 9px;
  transform: translateY(-50%);
  border-radius: var(--radius-round);
  background: var(--color-current);
  color: var(--color-on-brand);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .05em;
}

.switch-on {
  position: relative;
  width: 42px;
  height: 23px;
  flex-shrink: 0;
  border-radius: var(--radius-round);
  background: var(--color-brand);
}

.switch-on::after {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 17px;
  height: 17px;
  border-radius: var(--radius-round);
  background: var(--color-on-brand);
  content: "";
}

.switch-label {
  color: var(--color-brand);
  font-family: var(--font-code);
  font-size: 12px;
  font-weight: 650;
}

.preview-footer {
  margin-top: var(--space-section);
}

@media (max-width: 900px) {
  .blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-swatches {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .tab-shell {
    grid-template-columns: 1fr;
  }

  .tab-list {
    display: flex;
    max-width: 100%;
    padding-bottom: 4px;
    overflow-x: auto;
    gap: 8px;
  }

  .tab-button {
    width: auto;
    min-width: max-content;
    flex: 0 0 auto;
  }

  .client-grid,
  .term-grid,
  .blog-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .hero {
    padding-top: 20px;
  }

  .hero h1 {
    font-size: clamp(28px, 9.6vw, 38px);
  }

  .hero-sub {
    font-size: 16px;
  }

  .hero-actions .btn {
    flex: 1 1 150px;
  }

  .hero-chips {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .setup-stage {
    margin-top: 24px;
  }

  .setup-panel {
    box-shadow: none;
  }

  .setup-hint {
    display: none;
  }

  .setup-bar {
    grid-template-columns: 1fr auto 1fr;
  }

  .platform-row {
    padding-inline: 16px;
  }

  .setting-row {
    padding: 15px 16px;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .setting-value {
    grid-column: 2;
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .mono-chip {
    max-width: 100%;
  }

  .now-badge {
    position: static;
    grid-column: 1 / -1;
    width: fit-content;
    transform: none;
  }

  .client-badge {
    position: static;
    width: fit-content;
    margin-bottom: 14px;
    order: -1;
  }

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

  .preview-swatches {
    grid-template-columns: 1fr 1fr;
  }
}