/* Tabs */
.tab-shell {
  overflow: hidden;
  border-radius: var(--radius-large);
  background: var(--color-panel);
  color: var(--color-ink);
}

.tab-list {
  display: flex;
  max-width: 100%;
  overflow-x: auto;
  padding: 8px;
  gap: 5px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-list[role="tablist"] {
  border-bottom: 1px solid var(--color-border);
}

.tab-list [role="tab"] {
  display: inline-flex;
  min-height: 44px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font-weight: 700;
}

.tab-list [role="tab"]:hover {
  background: var(--color-panel-strong);
  color: var(--color-ink);
}

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

.tab-panel {
  padding: clamp(22px, 4vw, 40px);
}

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

/* Long-page navigation */
.toc-tabs {
  position: sticky;
  top: 12px;
  z-index: 20;
  display: flex;
  max-width: 100%;
  margin-bottom: 46px;
  overflow-x: auto;
  padding: 8px;
  gap: 5px;
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink);
  box-shadow: var(--shadow-soft);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.toc-tabs a {
  display: inline-flex;
  min-height: 42px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding: 8px 15px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-size: .88rem;
  font-weight: 650;
}

.toc-tabs a:hover,
.toc-tabs a:focus-visible {
  background: var(--color-canvas);
  color: var(--color-ink);
}

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

.faq-item {
  overflow: clip;
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  color: var(--color-ink);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 64px;
  cursor: pointer;
  align-items: center;
  padding: 17px 56px 17px 22px;
  font-weight: 750;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 22px;
  color: var(--color-accent-dark);
  font-size: 1.3rem;
  line-height: 1;
  content: "+";
  transform: translateY(-50%);
}

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

.faq-answer {
  padding: 0 22px 20px;
  color: var(--color-ink-soft);
}

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

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

.term-card {
  position: relative;
  padding: 26px;
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  color: var(--color-ink);
}

.term-card::before {
  position: absolute;
  top: 24px;
  left: 0;
  width: 4px;
  height: 30px;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--color-sky);
  content: "";
}

.term-card dt {
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
}

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

.term-alias {
  display: inline-block;
  margin-left: 7px;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 500;
}

/* Badges */
.badge {
  display: inline-flex;
  max-width: 100%;
  min-height: 28px;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  overflow: hidden;
  border-radius: var(--radius-pill);
  background: var(--color-panel-strong);
  color: var(--color-ink-soft);
  font-size: .72rem;
  font-weight: 750;
  line-height: 1.2;
  white-space: nowrap;
}

.badge-recommended,
.badge-featured {
  background: var(--color-accent);
  color: var(--color-canvas);
}

.badge-maintenance {
  background: var(--color-ink);
  color: var(--color-canvas);
}

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

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

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

/* Download cards */
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.client-card {
  display: flex;
  min-height: 260px;
  padding: 26px;
  border-radius: var(--radius-large);
  flex-direction: column;
  background: var(--color-panel);
  color: var(--color-ink);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.client-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-wide);
}

.client-card.is-featured {
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-wide);
}

.client-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.client-card-title {
  margin-bottom: 7px;
  font-size: 1.25rem;
}

.client-card-icon {
  width: 54px;
  height: 54px;
  flex: 0 0 auto;
}

.client-description {
  margin-top: 16px;
  color: var(--color-ink-soft);
}

.client-meta {
  display: flex;
  margin-top: auto;
  padding-top: 22px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.version-slot:empty {
  display: none;
}

.version-slot {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .76rem;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.download-actions .button {
  min-height: 42px;
  padding-inline: 17px;
  font-size: .84rem;
}

/* Blog cards */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.post-card {
  display: flex;
  min-height: 290px;
  padding: 26px;
  border-radius: var(--radius-large);
  flex-direction: column;
  background: var(--color-panel);
  color: var(--color-ink);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-wide);
}

.post-card time {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: .75rem;
}

.post-card h3 {
  margin-top: 18px;
  font-size: 1.22rem;
}

.post-card p {
  color: var(--color-ink-soft);
  font-size: .92rem;
}

.post-card .text-link {
  margin-top: auto;
}

/* Callout */
.callout {
  position: relative;
  margin: 28px 0;
  padding: 20px 22px 20px 28px;
  border-radius: var(--radius-medium);
  background: var(--color-panel);
  color: var(--color-ink-soft);
}

.callout::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 0;
  width: 5px;
  border-radius: 0 var(--radius-pill) var(--radius-pill) 0;
  background: var(--color-accent);
  content: "";
}

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

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

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

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

/* Tables and article body */
.table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-medium);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 620px;
  background: var(--color-canvas);
  color: var(--color-ink);
}

.data-table th {
  background: var(--color-panel-strong);
  color: var(--color-ink);
  font-size: .82rem;
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
}

.data-table td {
  color: var(--color-ink-soft);
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.prose {
  color: var(--color-ink-soft);
}

.prose h2 {
  margin-top: 2.4em;
}

.prose h3 {
  margin-top: 1.8em;
}

.prose li + li {
  margin-top: .55em;
}

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

/* End-of-article download guide */
.article-download-guide {
  display: grid;
  margin-top: 64px;
  padding: 28px;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
  border-radius: var(--radius-large);
  background: var(--color-panel);
  color: var(--color-ink);
}

.article-download-guide p {
  margin: 7px 0 0;
  color: var(--color-ink-soft);
}

/* Persistent download control */
.dl-fab {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 60;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-canvas);
  box-shadow: var(--shadow-accent);
  font-size: .87rem;
  font-weight: 750;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.dl-fab:hover {
  background: var(--color-accent-dark);
  color: var(--color-canvas);
  transform: translateY(-1px);
}

.dl-fab svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

@media (max-width: 820px) {
  .post-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toc-tabs {
    top: 8px;
    border-radius: var(--radius-medium);
  }
}

@media (max-width: 640px) {
  .glossary-grid,
  .download-grid,
  .post-grid {
    grid-template-columns: 1fr;
  }

  .client-card {
    min-height: 230px;
  }

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

  .article-download-guide .button {
    width: 100%;
  }

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

  .toc-tabs {
    position: static;
  }
}