.tab-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
}
.tab-list [role="tab"] {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 44px;
  max-width: 100%;
  padding: 10px 20px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: var(--c-bg);
  color: var(--c-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
}
.tab-list [role="tab"]:hover { background: var(--c-panel); color: var(--c-accent); }
.tab-list [role="tab"][aria-selected="true"] { background: var(--c-accent); color: var(--c-on-accent); border-color: var(--c-accent); }
[role="tabpanel"] { min-width: 0; }
.feature-zone { background: var(--c-charcoal); color: var(--c-on-accent); border-radius: var(--r-container); padding: 48px; overflow-x: clip; }
.feature-zone .tab-list [role="tab"] { border-color: var(--c-on-accent-line); background: var(--c-transparent); color: var(--c-on-accent); }
.feature-zone .tab-list [role="tab"][aria-selected="true"] { background: var(--c-bg); color: var(--c-accent); border-color: var(--c-bg); }
.feature-detail { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; }
.feature-copy { padding-right: 40px; border-right: 1px solid var(--c-on-accent-line); }
.feature-copy p { color: var(--c-on-accent-soft); line-height: 1.85; }
.feature-copy .feature-verdict { color: var(--c-on-accent); font-weight: var(--fw-bold); margin-bottom: 0; }
.feature-code { margin: 0; align-self: start; background: var(--c-accent-dark); color: var(--c-on-accent); border: 1px solid var(--c-on-accent-hair); border-radius: var(--r-card); }
.toc {
  display: flex;
  align-items: center;
  gap: 8px;
  position: sticky;
  top: 12px;
  z-index: 10;
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  padding: 10px;
  margin-bottom: 32px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  background: var(--c-bg);
  color: var(--c-text);
}
.toc a { flex-shrink: 0; min-height: 44px; display: inline-flex; align-items: center; padding: 10px 16px; border-radius: var(--r-pill); font-size: var(--fs-sm); }
.toc a:hover, .toc a[aria-current] { background: var(--c-accent); color: var(--c-on-accent); }
.faq-item { border-bottom: 1px solid var(--c-border); padding-block: 4px; }
.faq-item summary { position: relative; padding: 20px 36px 20px 0; font-weight: var(--fw-semibold); cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 20px; color: var(--c-accent); font-family: var(--f-mono); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { color: var(--c-muted); padding-bottom: 20px; }
.faq-answer p:last-child { margin-bottom: 0; }
.term-card { border-top: 4px solid var(--c-accent); }
.term-card dt { font-family: var(--f-display); font-size: var(--fs-h3); font-weight: var(--fw-display); margin-bottom: 12px; }
.term-card dd { margin: 0; color: var(--c-muted); }
.term-alias { display: block; font-family: var(--f-mono); font-size: var(--fs-xs); font-weight: var(--fw-regular); color: var(--c-muted); margin-top: 4px; }
.client-card { display: flex; flex-direction: column; gap: 24px; }
.client-head { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
.client-head h3 { margin: 0; }
.client-icon { width: 56px; height: 56px; flex-shrink: 0; }
.client-meta { color: var(--c-muted); font-size: var(--fs-sm); }
.client-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: auto; }
.badge, .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  padding: 5px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  background: var(--c-panel);
  color: var(--c-muted);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  overflow-wrap: anywhere;
}
.badge-first { background: var(--c-accent); color: var(--c-on-accent); border-color: var(--c-accent); }
.badge-recommended { background: var(--c-bg); color: var(--c-success); border-color: var(--c-success); }
.badge-retired { background: var(--c-panel-2); color: var(--c-muted); }
.tag-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.status-note { display: inline-flex; align-items: center; gap: 8px; color: var(--c-success); }
.status-note::before { content: ""; width: 7px; height: 7px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--c-success); }
.step-current { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--c-warn); color: var(--c-text); font-family: var(--f-mono); font-weight: var(--fw-bold); }
.article-card { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; }
.article-card h3 { margin: 0; font-size: var(--fs-h3); }
.article-card h3 a:hover { text-decoration: underline; text-underline-offset: 5px; }
.article-card p { margin: 0; color: var(--c-muted); }
.article-card time { color: var(--c-muted); font-family: var(--f-mono); font-size: var(--fs-xs); margin-top: auto; }
.callout {
  margin: 24px 0;
  padding: 24px 28px;
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--r-card);
  background: var(--c-panel);
  color: var(--c-text);
}
.callout p:last-child { margin-bottom: 0; }
.callout-success { border-left-color: var(--c-success); }
.callout-success strong { color: var(--c-success); }
.callout-error { border-left-color: var(--c-error); }
.callout-error strong { color: var(--c-error); }
.table-scroll { max-width: 100%; min-width: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--c-border); border-radius: var(--r-card); }
.data-table { width: 100%; border-collapse: collapse; text-align: left; font-size: var(--fs-sm); }
.data-table th, .data-table td, .prose table th, .prose table td {
  min-width: 7em;
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
  overflow-wrap: normal;
  word-break: normal;
}
.data-table th, .prose table th { background: var(--c-panel); color: var(--c-text); font-weight: var(--fw-bold); }
.data-table td, .prose table td { background: var(--c-bg); color: var(--c-text); }
.data-table tr:last-child td { border-bottom: 0; }
.prose table {
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  min-width: 0;
  border-collapse: collapse;
  text-align: left;
}
.prose table code, .data-table code { overflow-wrap: anywhere; word-break: normal; }
.article-download {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 48px;
  padding: 28px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-card);
  background: var(--c-panel);
  color: var(--c-text);
}
.article-download h2 { margin: 0 0 8px; font-size: var(--fs-h3); }
.article-download p { margin: 0; color: var(--c-muted); }
.dl-fab {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  max-width: calc(100% - 32px);
  padding: 12px 22px 12px 18px;
  border-radius: var(--r-pill);
  background: var(--c-accent);
  color: var(--c-on-accent);
  font-size: var(--fs-nav);
  font-weight: var(--fw-bold);
  box-shadow: var(--shadow-fab);
  transition: transform var(--ease-ui), background-color var(--ease-ui);
}
.dl-fab:hover { transform: translateY(-2px); background: var(--c-accent-dark); color: var(--c-on-accent); }
.dl-fab svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.swatch-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.swatch { min-width: 0; margin: 0; border: 1px solid var(--c-border); border-radius: var(--r-card); overflow: hidden; background: var(--c-bg); color: var(--c-text); }
.swatch-sample { height: 72px; }
.swatch figcaption { padding: 12px; font-size: var(--fs-xs); }
.swatch-sample.bg { background: var(--c-bg); }
.swatch-sample.panel { background: var(--c-panel); padding: 0; border: 0; border-radius: var(--r-field); }
.swatch-sample.panel2 { background: var(--c-panel-2); }
.swatch-sample.border { background: var(--c-border); }
.swatch-sample.accent { background: var(--c-accent); }
.swatch-sample.accent-dark { background: var(--c-accent-dark); }
.swatch-sample.accent-bright { background: var(--c-accent-bright); }
.swatch-sample.charcoal { background: var(--c-charcoal); }
.swatch-sample.text { background: var(--c-text); }
.swatch-sample.muted { background: var(--c-muted); }
.swatch-sample.success { background: var(--c-success); }
.swatch-sample.warn { background: var(--c-warn); }
.swatch-sample.error { background: var(--c-error); }
.swatch-sample.chrome-dot { background: var(--c-chrome-dot); }
.swatch-dark { background: var(--c-accent); color: var(--c-on-accent); }
.swatch-sample.on-accent { background: var(--c-on-accent); }
.swatch-sample.on-soft { background: var(--c-on-accent-soft); }
.swatch-sample.on-faint { background: var(--c-on-accent-faint); }
.swatch-sample.on-line { background: var(--c-on-accent-line); }
.swatch-sample.on-hair { background: var(--c-on-accent-hair); }
.swatch-sample.on-wash { background: var(--c-on-accent-wash); }
.swatch-sample.card-shade { background: var(--c-card-shade); }
.swatch-sample.fab-shade { background: var(--c-fab-shade); }
.swatch-sample.veil { background: var(--c-veil); }
.swatch-sample.transparent { background: var(--c-transparent); }
.type-display { font-family: var(--f-display); font-size: var(--fs-h1); font-weight: var(--fw-display); line-height: 1.2; }
.type-mono { font-family: var(--f-mono); font-size: var(--fs-sm); }
.preview-block { margin-top: 40px; }
@media (max-width: 768px) {
  .feature-zone { padding: 28px 22px; }
  .feature-detail { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .feature-copy { padding-right: 0; padding-bottom: 24px; border-right: 0; border-bottom: 1px solid var(--c-on-accent-line); }
}
@media (max-width: 640px) {
  .tab-list { gap: 8px; }
  .tab-list [role="tab"] { padding: 10px 14px; }
  .callout { padding: 20px; }
  .article-download { padding: 22px; }
  .dl-fab { right: 16px; bottom: 16px; }
  .swatch-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}