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

.tab-list,
[role="tablist"] {
  display: flex;
  max-width: 100%;
  gap: 6px;
  padding: 5px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.tab-button,
[role="tab"] {
  min-height: 42px;
  padding: 9px 18px;
  flex: 0 0 auto;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-muted);
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
}

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

.tab-button.is-active,
[role="tab"][aria-selected="true"] {
  border-color: var(--color-line);
  background: var(--color-page);
  color: var(--color-accent-deep);
  box-shadow: var(--shadow-line);
}

.tab-button:focus-visible,
[role="tab"]:focus-visible {
  outline: 3px solid var(--color-accent-soft);
  outline-offset: 1px;
}

.tab-panel,
[role="tabpanel"] {
  padding-top: 28px;
}

.tab-panel[hidden],
[role="tabpanel"][hidden] {
  display: none;
}

.jump-nav,
.toc {
  max-width: 100%;
  margin-bottom: 42px;
  padding: 14px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  color: var(--color-ink);
  -webkit-overflow-scrolling: touch;
}

.jump-nav ul,
.toc ul {
  min-width: max-content;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  list-style: none;
}

.jump-nav a,
.toc a {
  min-height: 38px;
  padding: 7px 13px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-ink);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
}

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

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

.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  min-height: 64px;
  padding: 18px 42px 18px 0;
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
  color: var(--color-ink);
  font-weight: 500;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 400;
}

.faq-item[open] summary::after {
  content: "−";
  border-color: var(--color-accent);
  color: var(--color-accent-deep);
}

.faq-answer {
  max-width: 850px;
  padding: 0 44px 22px 0;
  color: var(--color-ink-muted);
}

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

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

.term-card {
  padding: 23px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
  color: var(--color-ink);
}

.term-card dt {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
}

.term-card dd {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.download-card {
  padding: 28px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-line);
}

.download-card-head {
  margin-bottom: 22px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

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

.download-card-title {
  margin-bottom: 5px;
  font-size: 24px;
}

.download-card-meta {
  color: var(--color-ink-muted);
  font-size: 13px;
}

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

.badge,
.tag {
  max-width: 100%;
  padding: 5px 10px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink-muted);
  font-size: 12px;
  line-height: 1.2;
  text-overflow: clip;
  white-space: nowrap;
}

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

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

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

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

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

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

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

.article-card:hover {
  border-color: var(--color-accent);
  color: var(--color-ink);
  transform: translateY(-2px);
}

.article-card-meta {
  margin-bottom: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.article-card h3 {
  margin-bottom: 13px;
  font-size: 21px;
}

.article-card p {
  margin-bottom: 18px;
  color: var(--color-ink-muted);
  font-size: 14px;
}

.article-card-more {
  margin-top: auto;
  color: var(--color-accent-deep);
  font-size: 13px;
  font-weight: 600;
}

.callout {
  margin: 26px 0;
  padding: 20px 22px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

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

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

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

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

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

.dl-fab {
  position: fixed;
  right: max(18px, env(safe-area-inset-right));
  bottom: max(18px, env(safe-area-inset-bottom));
  z-index: 30;
  max-width: min(320px, calc(100vw - 32px));
  min-height: 58px;
  padding: 10px 18px 10px 11px;
  display: flex;
  align-items: center;
  gap: 11px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-page);
  text-decoration: none;
  box-shadow: var(--shadow-card);
}

.dl-fab:hover {
  border-color: var(--color-accent-deep);
  background: var(--color-accent-deep);
  color: var(--color-page);
}

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

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

.dl-fab-copy {
  min-width: 0;
  display: grid;
  line-height: 1.3;
}

.dl-fab-copy strong {
  color: var(--color-page);
  font-size: 14px;
}

.dl-fab-copy small {
  color: var(--color-page);
  font-size: 11.5px;
}

.end-download-card {
  margin-top: 54px;
  padding: 27px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  color: var(--color-ink);
}

.end-download-card h2,
.end-download-card h3 {
  margin-bottom: 7px;
  font-size: 23px;
}

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

.hero-preview {
  padding-top: 44px;
  padding-bottom: 44px;
  background: var(--color-page);
  color: var(--color-ink);
}

.hero-top {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: 56px;
  align-items: start;
}

.hero-title {
  margin-bottom: 0;
}

.hero-side {
  padding-top: 6px;
}

.hero-desc {
  max-width: 490px;
  margin-bottom: 0;
  color: var(--color-ink-muted);
  font-size: 16.5px;
  line-height: 1.72;
}

.hero-chips,
.platform-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-chips {
  margin-top: 20px;
}

.hero-chip {
  padding: 5px 13px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-ink-muted);
  font-size: 12.5px;
}

.hero-chip-dot {
  width: 5px;
  height: 5px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
}

.platform-row {
  margin-top: 30px;
  align-items: center;
  gap: 10px;
}

.platform-label {
  margin-right: 5px;
  color: var(--color-ink-muted);
  font-size: 13px;
}

.platform-chip {
  padding: 9px 15px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  color: var(--color-ink);
  font-size: 13px;
  text-decoration: none;
}

.platform-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-deep);
}

.platform-chip svg {
  width: 15px;
  height: 15px;
}

.hero-device {
  margin-top: 32px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  color: var(--color-ink);
}

.device-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--color-line);
}

.device-tab {
  position: relative;
  padding: 16px 8px;
  border-right: 1px solid var(--color-line);
  color: var(--color-ink-muted);
  font-size: 14px;
  text-align: center;
}

.device-tab:last-child {
  border-right: 0;
}

.device-tab.is-active {
  background: var(--color-page);
  color: var(--color-ink);
}

.device-tab.is-active::after {
  position: absolute;
  top: -1px;
  right: 0;
  left: 0;
  height: 2px;
  background: var(--color-accent);
  content: "";
}

.device-body {
  padding: 18px;
}

.client-window {
  display: flex;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
  color: var(--color-ink);
  box-shadow: var(--shadow-card);
}

.window-rail {
  width: 52px;
  padding: 14px 0;
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  flex-direction: column;
  gap: 6px;
  border-right: 1px solid var(--color-line);
}

.rail-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  color: var(--color-ink-muted);
}

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

.rail-icon.is-active {
  background: var(--color-panel-strong);
  color: var(--color-ink);
}

.rail-spacer {
  flex: 1;
}

.window-main {
  min-width: 0;
  flex: 1;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
}

.settings-column,
.rules-column {
  min-width: 0;
  padding: 20px 26px 16px;
}

.settings-column {
  border-right: 1px solid var(--color-line);
}

.pane-caption {
  margin-bottom: 6px;
  color: var(--color-ink-muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.setting-row {
  min-height: 63px;
  padding: 12px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--color-line);
}

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

.setting-name {
  font-size: 14px;
  font-weight: 500;
}

.setting-note {
  margin-top: 2px;
  color: var(--color-ink-muted);
  font-size: 12px;
}

.toggle {
  position: relative;
  width: 38px;
  height: 21px;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel-strong);
}

.toggle::after {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  content: "";
}

.toggle.is-on {
  border-color: var(--color-accent);
  background: var(--color-accent);
}

.toggle.is-on::after {
  right: 2px;
  left: auto;
  border-color: var(--color-accent);
}

.select-mock {
  padding: 5px 10px;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-page);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 11.5px;
}

.terminal-card {
  height: 100%;
  min-height: 245px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-page);
  color: var(--color-ink);
}

.terminal-bar {
  padding: 9px 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel);
  color: var(--color-ink);
}

.terminal-dot {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel-strong);
}

.terminal-name {
  margin-left: 7px;
  color: var(--color-ink-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.terminal-code {
  margin: 0;
  padding: 14px 16px;
  flex: 1;
  border: 0;
  border-radius: 0;
  background: var(--color-page);
  color: var(--color-ink);
  font-size: 11.5px;
}

.code-key {
  color: var(--color-ink-muted);
}

.code-value {
  color: var(--color-accent-deep);
}

.terminal-foot {
  padding: 8px 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-muted);
  font-size: 11px;
}

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

.token-card {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
  color: var(--color-ink);
}

.token-swatch {
  height: 86px;
  border-bottom: 1px solid var(--color-line);
}

.swatch-page { background: var(--color-page); }
.swatch-panel { background: var(--color-panel); }
.swatch-panel-strong { background: var(--color-panel-strong); }
.swatch-line { background: var(--color-line); }
.swatch-accent { background: var(--color-accent); }
.swatch-accent-deep { background: var(--color-accent-deep); }
.swatch-ink { background: var(--color-ink); }
.swatch-muted { background: var(--color-ink-muted); }
.swatch-success { background: var(--color-success); }
.swatch-warning { background: var(--color-warning); }
.swatch-error { background: var(--color-error); }

.token-label {
  padding: 12px;
  display: grid;
  gap: 2px;
  font-size: 12px;
}

.token-label code {
  overflow-wrap: anywhere;
}

.type-sample {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-line);
}

.type-sample:last-child {
  border-bottom: 0;
}

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

  .hero-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .window-main {
    grid-template-columns: 1fr;
  }

  .settings-column {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

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

@media (max-width: 640px) {
  .term-grid,
  .article-grid,
  .token-grid {
    grid-template-columns: 1fr;
  }

  .tab-list,
  [role="tablist"] {
    border-radius: var(--radius-md);
  }

  .download-card {
    padding: 21px;
  }

  .download-actions,
  .download-actions .button {
    width: 100%;
  }

  .end-download-card {
    align-items: stretch;
    flex-direction: column;
  }

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

  .hero-preview {
    padding-top: 32px;
    padding-bottom: 34px;
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .platform-row {
    align-items: stretch;
  }

  .platform-label {
    width: 100%;
  }

  .platform-chip {
    flex: 1 1 calc(50% - 6px);
    justify-content: center;
  }

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

  .device-tab:nth-child(2) {
    border-right: 0;
  }

  .device-tab:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-line);
  }

  .device-body {
    padding: 10px;
  }

  .window-rail {
    width: 42px;
  }

  .settings-column,
  .rules-column {
    padding: 16px;
  }

  .setting-row {
    gap: 10px;
  }

  .terminal-code {
    overflow-x: auto;
  }
}