.tabs { min-width: 0; }
.tab-list, [role="tablist"] {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  padding: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}
[role="tab"] {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-shrink: 0;
  min-height: 46px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--text-muted);
  font: inherit;
  text-align: left;
}
[role="tab"]:hover { border-color: var(--accent); color: var(--accent); }
[role="tab"][aria-selected="true"] {
  background: var(--active-tint);
  color: var(--accent);
  border-color: var(--accent);
}
[role="tabpanel"] { min-width: 0; margin-top: 24px; }
.tab-dot { width: 8px; height: 8px; flex-shrink: 0; border-radius: var(--r-circle); background: var(--accent); }
.tab-dot.is-lake { background: var(--lake); }
.tab-dot.is-apricot { background: var(--apricot); }
.feature-book { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 40px; align-items: start; }
.feature-book [role="tablist"] { flex-direction: column; align-items: stretch; gap: 12px; overflow: visible; padding: 20px 0; }
.feature-book [role="tab"] {
  justify-content: flex-start;
  width: 100%;
  padding: 18px 22px;
  border: 0;
  border-radius: var(--r-md);
  background: var(--clear);
  color: var(--text-muted);
}
.feature-book [role="tab"][aria-selected="true"] { color: var(--on-accent); background: var(--accent); }
.feature-book [role="tab"][aria-selected="true"] .tab-dot { background: var(--on-accent); }
.feature-book [role="tab"][aria-selected="true"]::before {
  content: "";
  position: absolute;
  left: 0;
  inset-block: 16px;
  width: 3px;
  border-radius: var(--r-pill);
  background: var(--accent);
}
.tab-progress {
  position: absolute;
  inset: auto 22px 6px;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--border);
  color: var(--accent);
  overflow: hidden;
}
.tab-progress::after { content: ""; display: block; width: 100%; height: 100%; background: var(--accent); transform: scaleX(0); transform-origin: left; }
.tabs.is-playing [aria-selected="true"] .tab-progress::after { animation: tab-time 8s linear forwards; }
@keyframes tab-time { to { transform: scaleX(1); } }
.feature-book [role="tabpanel"] { margin-top: 0; }
.feature-canvas {
  --canvas-bg: var(--feature-purple);
  --canvas-soft: var(--feature-purple-soft);
  border-radius: var(--r-xl);
  background: var(--canvas-bg);
  color: var(--text);
  overflow: hidden;
}
.feature-canvas.tone-lake { --canvas-bg: var(--feature-lake); --canvas-soft: var(--feature-lake-soft); }
.feature-canvas.tone-apricot { --canvas-bg: var(--feature-apricot); --canvas-soft: var(--feature-apricot-soft); }
.feature-art { display: block; width: 100%; height: 290px; padding: 24px; }
.feature-copy { padding: 32px 40px; background: var(--canvas-soft); color: var(--text); }
.feature-copy h3 { margin: 0 0 18px; }
.feature-copy p { line-height: 1.85; }
.feature-copy strong { display: block; margin-top: 20px; }
.rule-line { fill: none; stroke: var(--accent); stroke-width: 2; stroke-dasharray: 5 5; }
.rule-node { fill: var(--panel); stroke: var(--glass-line); stroke-width: 1; }
.rule-text { fill: var(--text); font-family: var(--font-mono); font-size: 15px; text-anchor: middle; dominant-baseline: middle; }

.toc {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 100%;
  margin-bottom: 32px;
  padding: 10px;
  overflow-x: auto;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
.toc a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  color: var(--text-muted);
  text-decoration: none;
}
.toc a:hover, .toc a[aria-current] { background: var(--active-tint); color: var(--accent); }
.toc-sticky { position: sticky; top: calc(var(--bar-h) + 12px); z-index: 10; }
.article-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; align-items: start; }
.article-layout > .toc { display: block; }
.article-layout > .toc a { display: flex; justify-content: flex-start; white-space: normal; }
.faq-tree { position: relative; padding-left: 24px; }
.faq-tree::before { content: ""; position: absolute; top: 18px; bottom: 18px; left: 5px; width: 1px; background: var(--border); }
.faq-item {
  position: relative;
  margin-bottom: 14px;
  padding: 0 24px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--panel);
  color: var(--text);
}
.faq-item::before {
  content: "";
  position: absolute;
  top: 28px;
  left: -24px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--bg);
  border-radius: var(--r-circle);
  background: var(--accent);
}
.faq-item summary {
  position: relative;
  min-height: 66px;
  padding: 20px 28px 20px 0;
  list-style: none;
  cursor: pointer;
  font-weight: var(--weight-medium);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 0; top: 18px; color: var(--accent); font-size: 22px; }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding-bottom: 24px; color: var(--text-muted); line-height: 1.85; }
.faq-answer p:last-child { margin-bottom: 0; }
.term-card { border-top: 3px solid var(--accent); }
.term-card dt { font-family: var(--font-display); font-size: 24px; font-weight: var(--weight-title); }
.term-card dd { margin: 16px 0 0; color: var(--text-muted); line-height: 1.85; }
.term-alias { display: block; margin-top: 6px; color: var(--text-muted); font-family: var(--font-mono); font-size: 13px; }

.badge, .tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  max-width: 100%;
  min-height: 28px;
  padding: 4px 11px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel-2);
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  white-space: normal;
  vertical-align: middle;
}
.badge-first { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.badge-recommended { border-color: var(--border); background: var(--active-tint); color: var(--accent-dark); }
.badge-archived { background: var(--panel-2); color: var(--text-muted); }
.tag { text-decoration: none; }
.tag:hover { border-color: var(--accent); color: var(--accent); }
.badge-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.client-card { display: flex; flex-direction: column; gap: 24px; }
.client-card.is-first { border-color: var(--accent); }
.client-head { display: flex; align-items: center; gap: 16px; min-width: 0; }
.client-head > div { min-width: 0; }
.client-icon { width: 56px; height: 56px; flex-shrink: 0; }
.client-name { margin: 0 0 8px; font-size: 24px; }
.client-card p { color: var(--text-muted); }
.client-facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 16px; margin: 0; font-size: 14px; }
.client-facts dt { color: var(--text-muted); }
.client-facts dd { margin: 0; overflow-wrap: anywhere; }
.client-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }
[data-rev]:empty { display: none; }
.post-card { display: flex; flex-direction: column; gap: 18px; }
.post-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; color: var(--text-muted); font-size: 13px; }
.post-card h3 { margin: 0; font-size: 22px; line-height: 1.5; }
.post-card h3 a { color: var(--text); text-decoration: none; }
.post-card h3 a:hover { color: var(--accent); }
.post-card p { margin: 0; color: var(--text-muted); line-height: 1.8; }
.post-card .read-link { margin-top: auto; }
.callout {
  margin: 28px 0;
  padding: 24px 28px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--r-lg);
  background: var(--panel);
  color: var(--text);
}
.callout strong { color: var(--accent-dark); }
.callout p:last-child { margin-bottom: 0; }
.callout-warn { border-left-color: var(--warn); }
.callout-warn strong { color: var(--text); }
.callout-error { border-left-color: var(--error); }
.callout-error strong { color: var(--text); }
.callout-success { border-left-color: var(--success); }
.callout-success strong { color: var(--text); }
.table-scroll { max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--panel); color: var(--text); }
.data-table { width: 100%; border-collapse: collapse; text-align: left; background: var(--panel); color: var(--text); }
.data-table :where(th, td), .prose table :where(th, td), .article-body table :where(th, td) {
  min-width: 7em;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  overflow-wrap: normal;
  word-break: normal;
  vertical-align: top;
}
.data-table th, .prose table th, .article-body table th { background: var(--panel-2); color: var(--text); font-weight: var(--weight-medium); }
.data-table tr:last-child td { border-bottom: 0; }
.prose table, .article-body table {
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  min-width: 0;
  border-collapse: collapse;
  background: var(--panel);
  color: var(--text);
}
.prose table code, .article-body table code, .data-table code { overflow-wrap: anywhere; }
.article-download {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 48px;
  padding: 28px 32px;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--panel);
  color: var(--text);
}
.article-download > div { min-width: 0; }
.article-download h2 { margin: 0 0 10px; font-size: 24px; }
.article-download p { margin: 0; color: var(--text-muted); }
.article-download .btn { flex-shrink: 0; }
.dl-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 20px 10px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  background: var(--panel);
  color: var(--accent);
  font-size: 15px;
  text-decoration: none;
  box-shadow: var(--shadow-fab);
  transition: border-color var(--duration), transform var(--duration);
}
.dl-fab svg { width: 17px; height: 17px; flex-shrink: 0; }
.dl-fab:hover { border-color: var(--accent); color: var(--accent-dark); transform: translateY(-1px); }
.river-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; padding-top: 48px; padding-bottom: 48px; }
.river-path { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.river-step { padding: 24px; background: var(--panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-lg); }
.river-step:nth-of-type(2) { margin-top: 48px; }
.river-step h3 { margin: 0 0 12px; font-size: 22px; }
.step-label { display: block; margin-bottom: 12px; color: var(--accent); font-family: var(--font-mono); font-size: 13px; }

.swatch-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.swatch {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--panel);
  color: var(--text);
  font-size: 12px;
  overflow-wrap: anywhere;
}
.swatch::before { content: ""; display: block; height: 44px; margin-bottom: 10px; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--swatch); }
.sw-bg { --swatch: var(--bg); }
.sw-panel { --swatch: var(--panel); }
.sw-panel-2 { --swatch: var(--panel-2); }
.sw-border { --swatch: var(--border); }
.sw-accent { --swatch: var(--accent); }
.sw-accent-dark { --swatch: var(--accent-dark); }
.sw-text { --swatch: var(--text); }
.sw-muted { --swatch: var(--text-muted); }
.sw-success { --swatch: var(--success); }
.sw-warn { --swatch: var(--warn); }
.sw-error { --swatch: var(--error); }
.sw-lake { --swatch: var(--lake); }
.sw-apricot { --swatch: var(--apricot); }
.sw-on-accent { --swatch: var(--on-accent); }
.sw-lake-ink { --swatch: var(--lake-ink); }
.sw-lake-night { --swatch: var(--lake-night); }
.sw-apricot-ink { --swatch: var(--apricot-ink); }
.sw-apricot-night { --swatch: var(--apricot-night); }
.sw-sky-top { --swatch: var(--sky-top); }
.sw-sky-bottom { --swatch: var(--sky-bottom); }
.sw-cloud { --swatch: var(--cloud); }
.sw-haze { --swatch: var(--cloud-haze); }
.sw-rfar { --swatch: var(--ridge-far); }
.sw-rmid { --swatch: var(--ridge-mid); }
.sw-valley { --swatch: var(--valley); }
.sw-slope { --swatch: var(--slope); }
.sw-hill { --swatch: var(--hill); }
.sw-hill-hi { --swatch: var(--hill-hi); }
.sw-river { --swatch: var(--river); }
.sw-bank { --swatch: var(--river-bank); }
.sw-bush { --swatch: var(--bush); }
.sw-cat { --swatch: var(--cat); }
.sw-cat-shade { --swatch: var(--cat-shade); }
.sw-cat-line { --swatch: var(--cat-line); }
.sw-node-sky { --swatch: var(--node-sky); }
.sw-bar { --swatch: var(--bar); }
.sw-bar-line { --swatch: var(--bar-line); }
.sw-glass { --swatch: var(--glass); }
.sw-glass-line { --swatch: var(--glass-line); }
.sw-term { --swatch: var(--term-bg); }
.sw-term-bar { --swatch: var(--term-bar); }
.sw-veil { --swatch: var(--veil); }
.sw-veil-mid { --swatch: var(--veil-mid); }
.sw-hover { --swatch: var(--hover-tint); }
.sw-active { --swatch: var(--active-tint); }
.sw-focus { --swatch: var(--focus-ring); }
.sw-shade { --swatch: var(--shade); }
.sw-clear { --swatch: var(--clear); }
.sw-purple { --swatch: var(--feature-purple); }
.sw-purple-soft { --swatch: var(--feature-purple-soft); }
.sw-feature-lake { --swatch: var(--feature-lake); }
.sw-lake-soft { --swatch: var(--feature-lake-soft); }
.sw-feature-apricot { --swatch: var(--feature-apricot); }
.sw-apricot-soft { --swatch: var(--feature-apricot-soft); }
.preview-stack { display: grid; gap: 24px; }
.preview-buttons { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
.type-sample { margin: 0; font-size: clamp(34px, 3.4vw, 48px); color: var(--accent); font-family: var(--font-display); font-weight: var(--weight-title); line-height: 1.24; }
.preview-static .drift, .preview-static .ln { animation: none; }
@media (max-width: 800px) {
  .feature-book { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .feature-book [role="tablist"] { flex-direction: row; overflow-x: auto; padding: 6px; gap: 8px; }
  .feature-book [role="tab"] { width: auto; padding: 12px 20px; border: 1px solid var(--border); border-radius: var(--r-pill); }
  .feature-book [role="tab"][aria-selected="true"]::before { display: none; }
  .feature-book .tab-progress { inset-inline: 20px; bottom: 5px; }
  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .article-layout > .toc { display: flex; }
  .article-layout > .toc a { white-space: nowrap; }
  .feature-copy { padding: 28px; }
  .article-download { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .swatch-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .faq-tree { padding-left: 20px; }
  .faq-item { padding-inline: 18px; }
  .faq-item::before { left: -20px; }
  .feature-art { height: 220px; padding: 12px; }
  .feature-copy { padding: 24px; }
  .river-steps { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .river-step:nth-of-type(2) { margin-top: 0; }
  .river-path { display: none; }
  .client-facts { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .client-facts dd { margin-bottom: 8px; }
  .dl-fab { right: 16px; bottom: max(16px, env(safe-area-inset-bottom)); }
}
@media (prefers-reduced-motion: reduce) {
  .tabs.is-playing [aria-selected="true"] .tab-progress::after { animation: none; }
}