.tab-shell {
  display: grid;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: 34px;
}

.tab-list {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}

.tab-button {
  position: relative;
  display: grid;
  width: 100%;
  min-height: 64px;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
  text-align: left;
}

.tab-button::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--color-transparent);
}

.tab-button:hover {
  background: var(--color-panel);
  color: var(--color-text);
}

.tab-button[aria-selected="true"] {
  color: var(--color-text);
}

.tab-button[aria-selected="true"]::before {
  background: var(--color-accent);
}

.tab-number {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.tab-title {
  font-weight: 600;
}

.tab-panel {
  min-width: 0;
  padding: clamp(26px, 5vw, 54px);
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg);
  color: var(--color-text-muted);
}

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

.tab-panel-note {
  margin: 34px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.jump-toc {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  max-width: 100%;
  gap: 8px;
  padding: 12px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-overflow-scrolling: touch;
}

.jump-toc a {
  display: inline-flex;
  min-height: 38px;
  flex: 0 0 auto;
  align-items: center;
  padding: 7px 12px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 14px;
  white-space: nowrap;
}

.jump-toc a:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
}

.faq-list {
  border-top: 1px solid var(--color-border-strong);
}

.faq-item {
  border-bottom: 1px solid var(--color-border-strong);
  background: var(--color-bg);
  color: var(--color-text);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 64px;
  align-items: center;
  padding: 17px 52px 17px 0;
  cursor: pointer;
  color: var(--color-text);
  font-weight: 600;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 400;
}

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

.faq-answer {
  max-width: 850px;
  padding: 0 52px 24px 0;
  color: var(--color-text-muted);
}

.glossary-card {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-muted);
}

.glossary-term {
  margin-bottom: 10px;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.glossary-category {
  display: inline-flex;
  max-width: 100%;
  margin-bottom: 18px;
  padding: 4px 8px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-panel-strong);
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.3;
  white-space: nowrap;
}

.client-card {
  min-width: 0;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg);
  color: var(--color-text);
}

.client-card-head {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.client-card-head img,
.client-logo {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.client-card-title {
  min-width: 0;
  flex: 1;
}

.client-card-title h3 {
  margin-bottom: 5px;
}

.client-meta {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.download-options {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.download-option {
  display: flex;
  min-width: 0;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text);
}

.download-option:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.download-option span {
  min-width: 0;
  overflow-wrap: anywhere;
}

.badge {
  display: inline-flex;
  max-width: 100%;
  min-height: 24px;
  align-items: center;
  padding: 4px 9px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-panel-strong);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.25;
  white-space: nowrap;
}

.badge-primary,
.badge-featured {
  border-color: var(--color-accent-dark);
  background: var(--color-accent-dark);
  color: var(--color-bg);
}

.badge-recommended {
  border-color: var(--color-success);
  background: var(--color-success);
  color: var(--color-bg);
}

.badge-warning {
  border-color: var(--color-warning);
  background: var(--color-warning);
  color: var(--color-text);
}

.badge-retired {
  border-color: var(--color-error);
  background: var(--color-error);
  color: var(--color-bg);
}

.article-card {
  display: flex;
  min-width: 0;
  min-height: 100%;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

.article-card:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-bottom: 18px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.article-card h3 {
  margin-bottom: 14px;
}

.article-summary {
  flex: 1;
  color: var(--color-text-muted);
}

.article-link {
  margin-top: 20px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
}

.callout {
  position: relative;
  margin: 28px 0;
  padding: 22px 24px 22px 48px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.callout::before {
  content: "//";
  position: absolute;
  top: 22px;
  left: 18px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-weight: 600;
}

.callout-title {
  display: block;
  margin-bottom: 6px;
  color: var(--color-text);
  font-weight: 600;
}

.callout-warning {
  border-color: var(--color-warning);
  background: var(--color-panel);
  color: var(--color-text);
}

.callout-error {
  border-color: var(--color-error);
  background: var(--color-panel);
  color: var(--color-text);
}

.dl-fab {
  position: fixed;
  z-index: 80;
  right: 22px;
  bottom: 22px;
  display: flex;
  width: min(340px, calc(100vw - 32px));
  min-height: 66px;
  align-items: center;
  gap: 13px;
  padding: 12px 16px;
  border: 1px solid var(--color-accent-dark);
  background: var(--color-bg);
  color: var(--color-text);
}

.dl-fab:hover {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.dl-fab-icon {
  display: grid;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  place-items: center;
  background: var(--color-accent);
  color: var(--color-bg);
}

.dl-fab-icon svg {
  width: 19px;
  height: 19px;
}

.dl-fab-copy {
  min-width: 0;
  line-height: 1.35;
}

.dl-fab-copy strong,
.dl-fab-copy small {
  display: block;
}

.dl-fab-copy small {
  margin-top: 3px;
  color: var(--color-text-muted);
}

.end-download-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  margin-top: 56px;
  padding: clamp(24px, 5vw, 44px);
  border: 1px solid var(--color-border-strong);
  background: var(--color-panel-strong);
  color: var(--color-text);
}

.data-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.preview-swatch-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.preview-swatch {
  min-height: 124px;
  padding: 16px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
}

.preview-swatch-color {
  height: 58px;
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
}

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

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

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

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

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

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

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

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

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

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

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

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

.preview-type-row {
  padding: 22px 0;
  border-bottom: 1px solid var(--color-border);
}

.preview-type-label {
  margin-bottom: 10px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
}

.preview-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-panel);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .tab-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .tab-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tab-button {
    grid-template-columns: 32px minmax(0, 1fr);
  }

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

  .end-download-card {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .tab-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .faq-answer {
    padding-right: 0;
  }

  .callout {
    padding: 20px 18px 20px 42px;
  }

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

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