:root {
  --component-tab-width: 300px;
  --component-fab-bottom: 22px;
  --component-fab-right: 22px;
}

.tab-layout {
  display: grid;
  grid-template-columns: minmax(220px, var(--component-tab-width)) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.tab-list {
  display: grid;
  gap: 10px;
}

.tab-button {
  position: relative;
  display: flex;
  width: 100%;
  min-height: 62px;
  padding: 8px 16px 8px 9px;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  color: var(--color-text-muted);
  cursor: pointer;
  text-align: left;
  transition: color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.tab-button::before {
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: inherit;
  background: var(--gradient-brand);
  content: "";
  opacity: 0;
}

.tab-button:hover {
  color: var(--color-text);
  transform: translateX(3px);
}

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

.tab-button[aria-selected="true"]::before {
  opacity: 1;
}

.tab-number {
  display: inline-flex;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
}

.tab-label {
  font-weight: 750;
}

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

.tab-panel {
  min-height: 330px;
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

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

.toc {
  display: flex;
  max-width: 100%;
  padding: 10px;
  overflow-x: auto;
  gap: 7px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  -webkit-overflow-scrolling: touch;
}

.toc a {
  flex-shrink: 0;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 650;
}

.toc a:hover,
.toc a[aria-current="location"] {
  background: var(--color-text);
  color: var(--color-bg);
}

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

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  box-shadow: 0 1px 2px var(--color-shadow-soft);
}

.faq-item summary {
  display: flex;
  min-height: 62px;
  padding: 18px 22px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  font-weight: 750;
  list-style: none;
}

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

.faq-item summary::after {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  border-right: 2px solid var(--color-text-muted);
  border-bottom: 2px solid var(--color-text-muted);
  content: "";
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  transform: rotate(225deg) translate(-2px, -2px);
}

.faq-item__answer {
  padding: 0 22px 22px;
  color: var(--color-text-muted);
}

.term-card {
  position: relative;
  padding: 26px;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.term-card::before {
  position: absolute;
  top: 0;
  left: 26px;
  width: 58px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  content: "";
}

.term-card__code {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
}

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

.client-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.client-card__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.client-card__icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
}

.client-card__meta {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.client-card__actions {
  display: flex;
  min-width: 180px;
  flex-direction: column;
  gap: 10px;
}

.status-badge {
  padding: 5px 10px;
  border: 1px solid var(--color-border);
  font-size: 11px;
  font-weight: 800;
}

.status-badge--first {
  border-color: var(--color-accent);
  background: var(--color-door);
  color: var(--color-accent-dark);
}

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

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

.article-card {
  display: flex;
  min-height: 100%;
  padding: 28px;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.article-card__meta {
  display: flex;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.article-card h3 {
  font-size: 22px;
}

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

.article-card__link {
  margin-top: auto;
  padding-top: 20px;
  color: var(--color-accent-dark);
  font-weight: 750;
}

.callout {
  position: relative;
  margin-block: 28px;
  padding: 22px 24px 22px 28px;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.callout::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--gradient-brand);
  content: "";
}

.callout__title {
  display: block;
  margin-bottom: 5px;
  font-weight: 800;
}

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

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

.data-table {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.table-scroll {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  -webkit-overflow-scrolling: touch;
}

.prose {
  color: var(--color-text);
}

.prose > * {
  max-width: 100%;
}

.prose > h2 {
  margin-top: 2.1em;
}

.prose > h3 {
  margin-top: 1.7em;
}

.prose > p,
.prose > ul,
.prose > ol {
  margin-bottom: 1.25em;
}

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

.download-guide-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  margin-top: 52px;
  padding: clamp(24px, 4vw, 38px);
  align-items: center;
  gap: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.download-guide-card__copy p {
  color: var(--color-text-muted);
}

.dl-fab {
  position: fixed;
  right: var(--component-fab-right);
  bottom: var(--component-fab-bottom);
  z-index: 60;
  display: inline-flex;
  max-width: calc(100vw - 32px);
  min-height: 58px;
  padding: 9px 18px 9px 10px;
  align-items: center;
  gap: 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  box-shadow: var(--shadow-card-hover);
  color: var(--color-text);
  font-weight: 750;
}

.dl-fab__icon {
  display: inline-flex;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
  color: var(--color-bg);
}

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

.dl-fab__text {
  overflow-wrap: anywhere;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.palette-swatch {
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
}

.palette-swatch__color {
  height: 92px;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

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

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

.palette-swatch__color--rose {
  background: var(--color-rose);
}

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

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

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

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

.palette-swatch__label {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.preview-stack {
  display: grid;
  gap: 24px;
}

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

  .tab-list {
    display: flex;
    padding-bottom: 5px;
    overflow-x: auto;
  }

  .tab-button {
    min-width: 190px;
    flex-shrink: 0;
  }

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

@media (max-width: 640px) {
  .tab-list {
    display: grid;
    overflow: visible;
  }

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

  .tab-button:hover {
    transform: none;
  }

  .tab-panel {
    min-height: 0;
    padding: 24px 20px;
  }

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

  .client-card__actions {
    min-width: 0;
  }

  .faq-item summary {
    padding-inline: 18px;
  }

  .faq-item__answer {
    padding-inline: 18px;
  }

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

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