.tab-shell {
  min-width: 0;
}

.tab-list {
  display: flex;
  max-width: 100%;
  gap: 6px;
  padding: 6px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-list [role="tab"] {
  min-height: 42px;
  flex: 1 0 auto;
  padding: 9px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  font-weight: 700;
  white-space: nowrap;
}

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

.tab-list [role="tab"][aria-selected="true"] {
  border-color: var(--color-border);
  background: var(--color-canvas);
  color: var(--color-text);
}

[role="tabpanel"] {
  min-width: 0;
  padding-top: 28px;
}

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

.toc-nav {
  display: flex;
  max-width: 100%;
  gap: 8px;
  padding: 8px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-canvas);
  color: var(--color-text);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.toc-nav a {
  display: inline-flex;
  min-height: 40px;
  flex: 0 0 auto;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-small);
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 650;
  white-space: nowrap;
}

.toc-nav a:hover {
  background: var(--color-panel);
  color: var(--color-text);
}

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

.faq-item {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-canvas);
  color: var(--color-text);
}

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

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 62px;
  align-items: center;
  gap: 14px;
  padding: 17px 54px 17px 20px;
  cursor: pointer;
  font-weight: 750;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 20px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  content: "";
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--ease-standard);
}

.faq-item[open] summary::after {
  transform: translateY(-20%) rotate(225deg);
}

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

.faq-answer > :last-child {
  margin-bottom: 0;
}

.term-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.term-card {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-canvas);
  color: var(--color-text);
}

.term-card dt {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 750;
}

.term-card dd {
  margin: 0;
  color: var(--color-text-muted);
}

.client-card {
  position: relative;
  display: grid;
  min-width: 0;
  gap: 22px;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-canvas);
  color: var(--color-text);
}

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

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

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

.client-card-title h3 {
  margin-bottom: 4px;
}

.client-card-title p {
  margin: 0;
  color: var(--color-text-muted);
}

.client-downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

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

.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-border);
  border-radius: var(--radius-pill);
  background: var(--color-canvas);
  color: var(--color-text);
  font-size: 12px;
  font-weight: 750;
  line-height: 1.2;
}

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

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

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

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

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

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

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

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.blog-card {
  display: flex;
  min-width: 0;
  height: 100%;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-canvas);
  color: var(--color-text);
  transition: border-color var(--ease-standard), transform var(--ease-standard);
}

.blog-card:hover {
  border-color: var(--color-text-muted);
  transform: translateY(-2px);
}

.blog-card-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;
}

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

.blog-card p {
  color: var(--color-text-muted);
}

.blog-card-link {
  margin-top: auto;
  color: var(--color-accent-deep);
  font-weight: 750;
}

.callout {
  position: relative;
  margin: 28px 0;
  padding: 21px 22px 21px 50px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  color: var(--color-text);
}

.callout::before {
  position: absolute;
  top: 23px;
  left: 22px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.callout-title {
  display: block;
  margin-bottom: 6px;
  color: var(--color-text);
  font-weight: 800;
}

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

.callout-success {
  border-color: var(--color-success);
}

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

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

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

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

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

.dl-fab {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 60;
  display: flex;
  max-width: min(320px, calc(100vw - 36px));
  align-items: center;
  gap: 12px;
  padding: 12px 18px 12px 12px;
  border: 1px solid var(--color-dark-edge);
  border-radius: var(--radius-pill);
  background: var(--color-ink-panel);
  color: var(--color-dark-text);
  box-shadow: var(--shadow-float);
}

.dl-fab:hover {
  color: var(--color-dark-text);
  transform: translateY(-2px);
}

.dl-fab-icon {
  display: inline-flex;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--color-trunk-start), var(--color-trunk-end));
  color: var(--color-button-text);
}

.dl-fab-icon svg {
  width: 17px;
  height: 17px;
}

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

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

.dl-fab-copy strong {
  color: var(--color-dark-text);
  font-size: 13px;
}

.dl-fab-copy span {
  color: var(--color-dark-muted);
  font-size: 11px;
}

.article-download-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  margin-top: 54px;
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid var(--color-dark-edge);
  border-radius: var(--radius-large);
  background: var(--color-ink-panel);
  color: var(--color-dark-text);
}

.article-download-card h2,
.article-download-card strong {
  color: var(--color-dark-text);
}

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

.feature-line {
  position: relative;
  display: grid;
  gap: 14px;
  padding-left: 42px;
}

.feature-line::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 13px;
  width: 1px;
  background: var(--color-border);
  content: "";
}

.feature-stop {
  position: relative;
  min-width: 0;
}

.feature-stop::before {
  position: absolute;
  top: 25px;
  left: -35px;
  width: 13px;
  height: 13px;
  border: 3px solid var(--color-canvas);
  border-radius: var(--radius-pill);
  background: var(--color-text-muted);
  box-shadow: 0 0 0 1px var(--color-border);
  content: "";
}

.feature-stop.is-active::before {
  width: 19px;
  height: 19px;
  top: 22px;
  left: -38px;
  background: linear-gradient(135deg, var(--color-trunk-start), var(--color-trunk-end));
  box-shadow: 0 0 0 1px var(--color-accent), 0 0 18px var(--glow-node);
}

.feature-stop-button {
  display: grid;
  width: 100%;
  grid-template-columns: minmax(180px, 0.7fr) minmax(0, 1.3fr);
  gap: 30px;
  padding: 21px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-canvas);
  color: var(--color-text);
  cursor: pointer;
  text-align: left;
}

.feature-stop:not(.is-active) .feature-stop-button {
  grid-template-columns: minmax(0, 1fr);
}

.feature-role {
  display: block;
  margin-bottom: 5px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.feature-stop-title {
  color: var(--color-text);
  font-size: 19px;
  font-weight: 800;
}

.feature-stop-detail {
  color: var(--color-text-muted);
}

.feature-stop:not(.is-active) .feature-stop-detail {
  display: none;
}

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

.preview-swatch {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: var(--color-canvas);
  color: var(--color-text);
}

.preview-swatch-color {
  height: 88px;
}

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

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

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

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

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

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

.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-trunk {
  background: linear-gradient(90deg, var(--color-trunk-start), var(--color-trunk-end));
}

.preview-swatch-label {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
}

.preview-section-head {
  max-width: 720px;
  margin-bottom: 42px;
}

.preview-type-stack {
  display: grid;
  gap: 26px;
}

.preview-type-stack > * {
  margin-bottom: 0;
}

@media (max-width: 980px) {
  .blog-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .preview-swatch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .term-grid,
  .blog-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .feature-stop-button {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

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

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

@media (max-width: 420px) {
  .dl-fab {
    right: 12px;
    bottom: 12px;
    left: 12px;
    max-width: none;
  }

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