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

.tab-list {
  display: flex;
  max-width: 100%;
  gap: 7px;
  margin: 0 0 24px;
  padding: 6px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-ink);
  list-style: none;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-list [role="tab"] {
  min-width: max-content;
  min-height: 44px;
  padding: 9px 17px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-muted);
  font-weight: 750;
  white-space: nowrap;
}

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

.tab-list [role="tab"][aria-selected="true"] {
  border-color: var(--color-line);
  background: var(--color-canvas);
  color: var(--color-accent-deep);
  box-shadow: var(--shadow-low);
}

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

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

.jump-toc {
  position: sticky;
  z-index: 20;
  top: 10px;
  display: flex;
  max-width: 100%;
  gap: 8px;
  margin-bottom: 40px;
  padding: 8px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-low);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.jump-toc a {
  display: inline-flex;
  min-width: max-content;
  min-height: 40px;
  align-items: center;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.jump-toc a:hover,
.jump-toc a[aria-current="true"] {
  background: var(--color-panel);
  color: var(--color-accent-deep);
}

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

.faq-item {
  overflow: clip;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-low);
}

.faq-item summary {
  position: relative;
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 52px 16px 20px;
  color: var(--color-ink);
  font-weight: 800;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  position: absolute;
  top: 50%;
  right: 20px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--color-panel);
  color: var(--color-accent-deep);
  content: "+";
  font: 800 18px/1 var(--font-mono);
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink);
}

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

.faq-answer {
  padding: 18px 20px 20px;
  color: var(--color-muted);
}

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

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

.term-card {
  position: relative;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-low);
}

.term-card::before {
  position: absolute;
  top: 0;
  left: 24px;
  width: 42px;
  height: 3px;
  background: var(--color-accent);
  content: "";
}

.term-card dt {
  margin-bottom: 9px;
  color: var(--color-ink);
  font: 850 20px/1.3 var(--font-display);
}

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

.term-alias {
  display: block;
  margin-top: 12px;
  color: var(--color-accent-deep);
  font: 650 11px/1.5 var(--font-mono);
  letter-spacing: 0.06em;
}

.download-card-grid {
  display: grid;
  gap: 20px;
}

.download-card {
  position: relative;
  min-width: 0;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-mid);
}

.download-card-head {
  display: flex;
  min-width: 0;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.download-card-icon {
  width: 54px;
  height: 54px;
  flex-shrink: 0;
}

.download-card-copy {
  min-width: 0;
  flex: 1;
}

.download-card-title {
  margin-bottom: 5px;
  font: 850 25px/1.25 var(--font-display);
}

.download-card-description {
  margin: 0;
  color: var(--color-muted);
}

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

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 18px;
  color: var(--color-muted);
  font-size: 13px;
}

.badge {
  display: inline-flex;
  max-width: 100%;
  min-height: 27px;
  align-items: center;
  padding: 4px 9px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font: 800 11px/1.35 var(--font-mono);
  white-space: nowrap;
}

.badge-primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-white-text);
}

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

.badge-retired {
  border-color: var(--color-line);
  background: var(--color-panel-strong);
  color: var(--color-muted);
}

.badge-outline {
  border-color: var(--color-accent);
  background: var(--color-canvas);
  color: var(--color-accent-deep);
}

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

.article-card {
  display: flex;
  min-width: 0;
  min-height: 100%;
  flex-direction: column;
  padding: 25px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-low);
  text-decoration: none;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent-dot);
  color: var(--color-ink);
  box-shadow: var(--shadow-mid);
}

.article-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  color: var(--color-muted);
  font: 650 11px/1.5 var(--font-mono);
}

.article-card-title {
  margin-bottom: 11px;
  color: var(--color-ink);
  font: 850 clamp(19px, 2vw, 24px)/1.38 var(--font-display);
}

.article-card-summary {
  margin-bottom: 18px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

.article-card-more {
  margin-top: auto;
  color: var(--color-accent-deep);
  font-weight: 800;
}

.callout {
  position: relative;
  margin-top: 24px;
  margin-bottom: 24px;
  padding: 20px 22px 20px 26px;
  border: 1px solid var(--color-accent-dot);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

.callout::before {
  position: absolute;
  top: 18px;
  bottom: 18px;
  left: 9px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.callout-title {
  display: block;
  margin-bottom: 6px;
  color: var(--color-accent-deep);
  font: 800 12px/1.4 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

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

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

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

.end-download-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin-top: 48px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-accent-dot);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-ink);
  box-shadow: var(--shadow-low);
}

.end-download-card h2,
.end-download-card h3 {
  margin-bottom: 8px;
}

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

.dl-fab {
  position: fixed;
  z-index: 60;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  display: inline-flex;
  max-width: min(310px, calc(100vw - 32px));
  min-height: 58px;
  align-items: center;
  gap: 12px;
  padding: 10px 16px 10px 11px;
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-md);
  background: var(--color-accent);
  color: var(--color-white-text);
  box-shadow: var(--shadow-high);
  text-decoration: none;
}

.dl-fab:hover {
  transform: translateY(-2px);
  background: var(--color-accent-deep);
  color: var(--color-white-text);
}

.dl-fab-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
  color: var(--color-accent-deep);
}

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

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

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

.dl-fab-copy strong {
  color: var(--color-white-text);
  font-size: 14px;
  line-height: 1.35;
}

.dl-fab-copy span {
  margin-top: 2px;
  color: var(--color-white-text);
  font-size: 11px;
  line-height: 1.35;
}

.step-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 5vw, 56px);
  margin-top: 50px;
}

.step-item {
  min-width: 0;
}

.step-number {
  margin-bottom: 16px;
  color: var(--color-accent-deep);
  font: 800 12px/1.4 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.step-title {
  margin-bottom: 10px;
  color: var(--color-ink);
  font: 800 15px/1.5 var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.step-copy {
  margin-bottom: 0;
  color: var(--color-muted);
}

.feature-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(30px, 6vw, 76px);
  align-items: center;
  padding-top: clamp(48px, 7vw, 84px);
  padding-bottom: clamp(48px, 7vw, 84px);
}

.feature-row.is-reversed .feature-copy {
  order: 2;
}

.feature-row.is-reversed .feature-demo {
  order: 1;
}

.feature-demo {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  color: var(--color-ink);
  box-shadow: var(--shadow-mid);
}

.feature-setting {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 13px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--color-line);
}

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

.feature-setting span:first-child {
  min-width: 0;
  overflow-wrap: anywhere;
  font-weight: 750;
}

.feature-setting code {
  color: var(--color-muted);
  font-size: 12px;
  text-align: right;
}

@media (max-width: 760px) {
  .glossary-grid,
  .article-card-grid,
  .step-strip,
  .feature-row {
    grid-template-columns: 1fr;
  }

  .feature-row.is-reversed .feature-copy,
  .feature-row.is-reversed .feature-demo {
    order: initial;
  }

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

  .end-download-card .button-primary {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .jump-toc {
    top: 6px;
  }

  .download-card-head {
    align-items: center;
  }

  .download-card-icon {
    width: 46px;
    height: 46px;
  }

  .download-actions .button-primary,
  .download-actions .button-secondary {
    flex: 1 1 145px;
  }

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

  .dl-fab-copy span {
    display: none;
  }

  .feature-setting {
    align-items: flex-start;
  }
}