/* Lu Freitas Personal Research Website — Bitstream Charter & Tufte Margin Architecture (v5)
 * Typeface: Bitstream Charter / Charis SIL (designed by Matthew Carter, 1987)
 * Surface: Warm Parchment Vellum (#FAF6EE) & Deep Charcoal Ink (#2B2B2B)
 * Kitaev RGB Bonds: x = Scarlet Red (#E41A1C), y = Leaf Green (#4DAF4A), z = Cobalt Blue (#00639A)
 * Attention Accents: Soft Light Pink (#FFCCD7) & Softened Translucent Light Blue (rgba(91, 206, 250, 0.34))
 * Zero beige boxes, zero italics in headings, zero ALL CAPS, zero horizontal-scrolling equations.
 */

@import url('https://fonts.googleapis.com/css2?family=Charis+SIL:ital,wght@0,400;0,700;1,400;1,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-paper: #FAF6EE;
  --ink-primary: #2B2B2B;
  --ink-secondary: #484848;
  --ink-muted: #6E6A63;
  --ink-quiet: #7A756D;
  --bond-x-red: #E41A1C;
  --bond-y-green: #3B8E38;
  --bond-z-blue: #00639A;
  --normal-slate: #374151;
  --accent-pink: #FFCCD7;
  --accent-blue: rgba(91, 206, 250, 0.34);
  --accent-blue-border: rgba(91, 206, 250, 0.68);
  --rule-stone: #D5CBB9;
  --rule-soft: #E5DECFE6;
  --focus-ring: #00639A;
  --font-body: "Bitstream Charter", "Charis SIL", "Charter", "ITC Charter", Georgia, serif;
  --font-mono: "JetBrains Mono", "DejaVu Sans Mono", Consolas, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  background-color: var(--bg-paper);
  color: var(--ink-primary);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.58;
  background-color: var(--bg-paper);
  color: var(--ink-primary);
}

/* Accessible Skip Link */
.skip-link {
  position: absolute;
  top: -3.5rem;
  left: 1rem;
  background: var(--bond-z-blue);
  color: #FFFFFF;
  padding: 0.45rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 3px;
  z-index: 1000;
}

.skip-link:focus {
  top: 0.75rem;
  outline: 3px solid var(--bond-z-blue);
  outline-offset: 2px;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--bond-z-blue);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Minimal Top Header (Strictly 4 Primary Links: Home / Research / About Me / Notes) */
.site-header {
  border-bottom: 1px solid var(--rule-stone);
  background-color: var(--bg-paper);
  padding: 0.85rem 1.5rem;
}

.site-header-inner {
  max-width: 66rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.site-brand-group {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.75rem;
}

.site-brand {
  font-family: var(--font-body);
  font-size: 1.26rem;
  font-weight: 700;
  color: var(--ink-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-brand:hover {
  color: var(--bond-z-blue);
}

.site-brand-subtitle {
  font-size: 0.92rem;
  font-weight: 400;
  color: var(--ink-muted);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1rem;
}

.site-nav a {
  color: var(--ink-secondary);
  text-decoration: none;
  padding: 0.15rem 0.05rem;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--bond-z-blue);
  border-bottom-color: var(--rule-stone);
}

.site-nav a[aria-current="page"] {
  color: var(--bond-z-blue);
  border-bottom-color: var(--bond-z-blue);
  font-weight: 700;
}

/* DAG Breadcrumb Navigation Bar (Shown on Child Nodes) */
.breadcrumb-nav {
  font-size: 0.88rem;
  color: var(--ink-muted);
  margin: 0 0 0.85rem 0;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--rule-soft);
}

.breadcrumb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb-list a {
  color: var(--bond-z-blue);
  text-decoration: none;
}

.breadcrumb-list a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--ink-quiet);
}

/* Tufte Asymmetrical Page Shell */
.page-shell {
  max-width: 66rem;
  margin: 0 auto;
  padding: 1.35rem 1.5rem 2.2rem;
}

.page-shell.single-col {
  max-width: 66rem;
}

main.reading-column {
  width: 100%;
  min-width: 0;
}

/* Tufte Two-Column Section Grid (64% Main Column + 33% Right Margin Column) */
.tufte-section {
  display: grid;
  grid-template-columns: minmax(0, 64%) minmax(0, 33%);
  gap: 3%;
  align-items: start;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--rule-soft);
}

.tufte-section:last-of-type {
  border-bottom: none;
}

.tufte-main {
  min-width: 0;
}

.tufte-margin {
  border-left: 1px solid var(--rule-soft);
  padding-left: 1.1rem;
  font-size: 0.89rem;
  line-height: 1.46;
  color: var(--ink-secondary);
}

/* Headings: Upright Bitstream Charter Bold, Reduced Size Contrast, Squished Vertical Proportions */
h1, h2, h3, h4 {
  font-family: var(--font-body);
  font-style: normal;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.01em;
}

h1 {
  font-size: 1.56rem;
  line-height: 1.18;
  margin: 0 0 0.35rem 0;
  transform: scaleY(0.94);
  transform-origin: left bottom;
}

h2 {
  font-size: 1.2rem;
  line-height: 1.24;
  margin: 1.2rem 0 0.4rem 0;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid var(--rule-stone);
  transform: scaleY(0.95);
  transform-origin: left bottom;
}

.tufte-main > h2:first-child {
  margin-top: 0;
}

h3 {
  font-size: 1.06rem;
  line-height: 1.26;
  margin: 0.95rem 0 0.3rem 0;
  transform: scaleY(0.95);
  transform-origin: left bottom;
}

p {
  margin: 0 0 0.8rem 0;
}

a {
  color: var(--bond-z-blue);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: #00456B;
  text-decoration-thickness: 2px;
}

.credential-line {
  font-size: 0.96rem;
  color: var(--ink-secondary);
  margin: 0.1rem 0 0.7rem 0;
}

/* Double-Hairline Typographic Colophon Strip (No Beige Fill) */
.colophon-strip {
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--rule-stone);
  padding: 0.42rem 0;
  margin: 0.55rem 0 1.05rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.95rem;
  font-size: 0.92rem;
  color: var(--ink-secondary);
}

.colophon-strip a {
  text-decoration: none;
  font-weight: 700;
  color: var(--bond-z-blue);
}

.colophon-strip a:hover {
  text-decoration: underline;
}

/* Compact README Directory List on Home */
.readme-directory {
  margin: 0.95rem 0 0.2rem 0;
  border-top: 1px solid var(--rule-stone);
}

.readme-dir-row {
  display: grid;
  grid-template-columns: 8.5rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.52rem 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 0.96rem;
  line-height: 1.48;
}

.readme-dir-row a {
  font-weight: 700;
  text-decoration: none;
}

.readme-dir-row a:hover {
  text-decoration: underline;
}

/* Publication & Note Metadata Lines */
.paper-citation-line {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink-secondary);
  margin-bottom: 0.5rem;
}

.paper-citation-line a {
  font-weight: 700;
  text-decoration: none;
}

.paper-citation-line a:hover {
  text-decoration: underline;
}

/* Margin Pills — ONLY Soft Pink (#FFCCD7), Softened Sky Blue (rgba(91,206,250,0.34)), or Clean Unboxed Quiet Label (NO BEIGE BOXES!) */
.margin-pill {
  display: inline-block;
  padding: 0.12rem 0.52rem;
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  margin: 0 0.35rem 0.3rem 0;
}

.margin-pill.pink {
  background-color: var(--accent-pink);
  color: var(--ink-primary);
}

.margin-pill.blue {
  background-color: var(--accent-blue);
  border: 1px solid var(--accent-blue-border);
  color: var(--ink-primary);
}

/* Unboxed, quiet typographic label instead of a beige box! */
.margin-pill.neutral,
.margin-pill.quiet {
  background-color: transparent;
  border: none;
  padding: 0;
  margin: 0 0 0.2rem 0;
  display: block;
  color: var(--ink-quiet);
  font-size: 0.82rem;
  font-weight: 700;
}

.margin-note-item {
  margin-bottom: 0.85rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--rule-stone);
}

.margin-note-item.quiet-note {
  color: var(--ink-quiet);
  font-size: 0.84rem;
  line-height: 1.42;
}

.margin-note-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.margin-figure {
  margin-bottom: 0.85rem;
}

.margin-figure.vibe-art img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 0.65rem auto;
  border: none;
  background: transparent;
}

.margin-figure.labeled-svg img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  padding: 0.35rem;
  border: 1px solid var(--rule-soft);
  background: var(--bg-paper);
}

.margin-figcaption {
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--ink-secondary);
  margin-top: 0.35rem;
}

/* Unified Feed Filter Bar & Feed Cards (No Beige Boxes!) */
.feed-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0;
  margin: 0.6rem 0 1.1rem 0;
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--rule-stone);
}

.feed-filter-label {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-secondary);
  margin-right: 0.25rem;
}

.feed-filter-btn {
  background: transparent;
  color: var(--ink-secondary);
  border: 1px solid var(--rule-stone);
  border-radius: 3px;
  padding: 0.16rem 0.6rem;
  font-family: var(--font-body);
  font-size: 0.84rem;
  cursor: pointer;
}

.feed-filter-btn:hover {
  border-color: var(--bond-z-blue);
  color: var(--bond-z-blue);
}

.feed-filter-btn.active {
  background: var(--accent-blue);
  border-color: var(--bond-z-blue);
  color: var(--ink-primary);
  font-weight: 700;
}

.feed-card {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--rule-soft);
}

.feed-card:last-child {
  border-bottom: none;
}

.feed-card-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  margin-bottom: 0.25rem;
}

.feed-card-title {
  margin: 0;
  font-size: 1.12rem;
}

.feed-card-title a {
  text-decoration: none;
}

.feed-card-title a:hover {
  text-decoration: underline;
}

.feed-tag-list {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.feed-tag {
  color: var(--ink-muted);
}

/* Callouts & Equations — Transparent Warm Parchment Surface with Left Accent Rule (No Beige Fill!) */
.scope-panel,
.continuity-box,
.note-metadata-box {
  background-color: transparent;
  border-left: 3px solid var(--accent-blue-border);
  padding: 0.45rem 0 0.45rem 0.95rem;
  margin: 0.85rem 0;
  font-size: 0.95rem;
}

.scope-panel.epistemic-warning {
  border-left-color: var(--accent-pink);
}

.scope-panel-title {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--ink-primary);
  margin-bottom: 0.2rem;
}

.math-scroll,
mjx-container[display="true"] {
  overflow-x: visible;
  overflow-y: visible;
  max-width: 100%;
  padding: 0.3rem 0 0.3rem 0.85rem;
  background-color: transparent;
  border-left: 3px solid var(--accent-blue-border);
  margin: 0.65rem 0;
  font-size: 0.96rem;
}

pre, code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

pre {
  background-color: transparent;
  border: 1px solid var(--rule-stone);
  border-radius: 3px;
  padding: 0.7rem 0.9rem;
  overflow-x: auto;
  max-width: 100%;
  line-height: 1.46;
}

code {
  background-color: transparent;
  padding: 0;
  color: var(--ink-secondary);
}

.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 0.85rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

th, td {
  text-align: left;
  padding: 0.5rem 0.65rem;
  border-bottom: 1px solid var(--rule-stone);
  vertical-align: top;
}

th {
  font-weight: 700;
  color: var(--ink-primary);
  background-color: transparent;
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--ink-primary);
}

aside.page-toc {
  display: none;
}

/* Footer with Expandable/Visible DAG Sitemap Tree */
.site-footer {
  border-top: 1px solid var(--rule-stone);
  padding: 1rem 1.5rem 1.4rem;
  font-size: 0.86rem;
  color: var(--ink-muted);
  background-color: var(--bg-paper);
}

.site-footer-inner {
  max-width: 66rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.6rem 1.25rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.95rem;
}

.footer-links a {
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.sitemap-details {
  max-width: 66rem;
  margin: 0.55rem auto 0;
  font-size: 0.84rem;
  color: var(--ink-secondary);
}

.sitemap-details summary {
  cursor: pointer;
  color: var(--bond-z-blue);
  font-weight: 700;
  user-select: none;
}

.sitemap-tree {
  margin: 0.5rem 0 0 0;
  padding: 0.6rem 0 0.2rem 0;
  border-top: 1px dashed var(--rule-stone);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13.5rem, 1fr));
  gap: 0.75rem 1.25rem;
}

.sitemap-branch-title {
  font-weight: 700;
  color: var(--ink-primary);
  margin-bottom: 0.25rem;
}

.sitemap-branch-title a {
  text-decoration: none;
}

.sitemap-children {
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.75rem;
  border-left: 1px solid var(--rule-stone);
}

.sitemap-children li {
  margin: 0.2rem 0;
}

.sitemap-children a {
  text-decoration: none;
}

.sitemap-children a:hover {
  text-decoration: underline;
}

@media (max-width: 860px) {
  .tufte-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.9rem;
  }
  .tufte-margin {
    border-left: none;
    border-top: 1px dashed var(--rule-stone);
    padding-left: 0;
    padding-top: 0.65rem;
  }
  .readme-dir-row {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

@media print {
  html, body {
    background: #FFFFFF;
    color: #000000;
    font-size: 10.5pt;
  }
  .site-header, .skip-link, .sitemap-details {
    display: none !important;
  }
}

/* v6 Unified Blog Feed: Live Keyword Search Input & Clickable #Tag Pills */
.feed-controls-wrapper {
  margin: 0.75rem 0 1.15rem 0;
  padding: 0.7rem 0;
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--rule-stone);
}

.feed-search-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.6rem;
}

.feed-search-input {
  flex: 1 1 18rem;
  font-family: var(--font-body);
  font-size: 0.94rem;
  color: var(--ink-primary);
  background-color: transparent;
  border: 1px solid var(--rule-stone);
  border-radius: 3px;
  padding: 0.36rem 0.7rem;
}

.feed-search-input:focus {
  outline: 2px solid var(--bond-z-blue);
  border-color: var(--bond-z-blue);
}

.feed-count-status {
  font-size: 0.84rem;
  color: var(--ink-muted);
}

.feed-filter-bar {
  border-top: none;
  border-bottom: none;
  padding: 0;
  margin: 0;
}

.feed-tag-btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.77rem;
  color: var(--bond-z-blue);
  background: transparent;
  border: 1px solid var(--rule-stone);
  border-radius: 3px;
  padding: 0.08rem 0.42rem;
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.feed-tag-btn:hover {
  background-color: var(--accent-blue);
  border-color: var(--bond-z-blue);
}

.feed-tag-btn.active-tag {
  background-color: var(--accent-pink);
  border-color: #D48A9B;
  color: var(--ink-primary);
  font-weight: 700;
}

.feed-active-tag-banner {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--ink-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.feed-clear-btn {
  background: transparent;
  border: 1px solid var(--rule-stone);
  border-radius: 3px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--bond-z-blue);
  padding: 0.1rem 0.45rem;
  cursor: pointer;
}

.feed-clear-btn:hover {
  border-color: var(--bond-z-blue);
  background: var(--accent-blue);
}

.feed-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.55rem;
  margin-bottom: 0.25rem;
  font-size: 0.84rem;
  color: var(--ink-muted);
}

/* Feed Toolbar: Multi-option Filter (Left) + Search Box (Right) */
.feed-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem 1.25rem;
  flex-wrap: wrap;
  padding: 0.65rem 0;
  margin: 0.6rem 0 1.1rem 0;
  border-top: 2px solid var(--ink-primary);
  border-bottom: 1px solid var(--rule-stone);
}

.feed-filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  flex: 1 1 320px;
}

.feed-search-box {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
  flex: 0 1 300px;
  min-width: 240px;
}

.feed-search-input {
  width: 100%;
  padding: 0.34rem 0.6rem;
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--ink-primary);
  background: #FFFFFF;
  border: 1px solid var(--rule-stone);
  border-radius: 3px;
}

.feed-search-input:focus {
  outline: 2px solid var(--bond-z-blue);
  border-color: var(--bond-z-blue);
}

.feed-count-status {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

@media (max-width: 720px) {
  .feed-search-box {
    flex: 1 1 100%;
    align-items: flex-start;
  }
}

/* Compact note controls and responsive floating navigation */
[hidden] { display: none !important; }
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.floating-navigation {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 120;
}
.floating-control {
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--rule-stone);
  border-radius: 4px;
  color: var(--ink-primary);
  background: var(--bg-paper);
  display: inline-flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.floating-control:hover,
.floating-control:focus-visible {
  color: var(--bond-z-blue);
  border-color: var(--bond-z-blue);
}
.back-to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 120;
}
.quick-menu-panel {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;
  width: 12rem;
  background: var(--bg-paper);
  border: 1px solid var(--rule-stone);
  padding: 0.65rem 0.9rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.07);
}
.quick-menu-panel .site-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: stretch;
}
.quick-menu-panel .site-nav a { display: block; }
.feed-controls-wrapper {
  padding: 0;
  margin: 0 0 1rem;
  border: none;
}
.feed-toolbar {
  margin: 0;
  padding: 0.55rem 0;
  border-top: 1px solid var(--rule-stone);
  border-bottom: 1px solid var(--rule-stone);
  align-items: center;
  flex-wrap: nowrap;
}
.feed-filter-group {
  flex: 1 1 auto;
  min-width: 0;
  align-items: center;
}
.feed-search-box {
  flex: 0 0 auto;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}
.feed-search-toggle {
  border: 1px solid var(--rule-stone);
  background: transparent;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.15rem;
  height: 2.15rem;
  cursor: pointer;
  color: var(--ink-secondary);
}
.feed-search-toggle:hover { color: var(--bond-z-blue); }
.feed-search-box .feed-search-input {
  flex: none;
  width: min(16rem, 45vw);
  height: 2.15rem;
  min-height: 0;
  padding: 0.25rem 0.55rem;
  font-size: 0.9rem;
  background: transparent;
}
.feed-card[hidden] { display: none !important; }
.feed-card { padding: 0.7rem 0; }
.feed-card-title { font-size: 1.02rem; line-height: 1.35; }
.feed-card-meta { margin: 0.2rem 0 0; color: var(--ink-muted); font-size: 0.83rem; }
.feed-empty-notice { margin: 0.6rem 0; color: var(--ink-muted); }
.note-provenance[hidden] { display: none; }
@media (max-width: 720px) {
  .site-header nav[aria-label="Primary"] { display: none; }
  .site-header { padding-right: 4.2rem; }
  .feed-toolbar { flex-wrap: wrap; gap: 0.55rem; }
  .feed-search-box .feed-search-input { width: min(14rem, 65vw); }
}
@media print {
  .floating-navigation, .back-to-top { display: none !important; }
}

/* Home links form a single-column directory, without unused descriptions. */
.readme-dir-row { grid-template-columns: minmax(0, 1fr); padding: 0.65rem 0; }

/* Optional Kitaev island; sitewide layout remains unchanged. */
.kmf-island { margin:1.1rem 0 1.4rem; padding:.85rem 0; border-top:1px solid var(--rule-stone); border-bottom:1px solid var(--rule-soft); }
.kmf-island figcaption { font-weight:700; margin:0 0 .4rem; }
.kmf-island .kmf-caption { color:var(--ink-secondary); font-size:.93rem; margin:.25rem 0 .65rem; }
.kmf-island .kmf-viewport { max-width:32rem; }
.kmf-island .kmf-viewport img, .kmf-island .kmf-viewport canvas { display:block; width:100%; height:auto; }
.kmf-island [hidden] { display:none !important; }
.kmf-island .kmf-controls { max-width:32rem; margin:.75rem 0; }
.kmf-island .kmf-controls label { font-size:.95rem; display:inline-flex; gap:.6rem; align-items:baseline; }
.kmf-island .kmf-controls output { font:.9rem var(--font-mono); }
.kmf-island .kmf-controls input[type="range"] { display:block; width:100%; accent-color:var(--bond-z-blue); margin-top:.3rem; }
.kmf-island .kmf-readout { font-size:.89rem; color:var(--ink-secondary); margin:.4rem 0; min-height:1.3em; }
@media print {
  .kmf-island .kmf-controls,.kmf-island .kmf-viewport canvas { display:none !important; }
  .kmf-island .kmf-viewport img[hidden] { display:block !important; }
}

.kmf-island table { width:100%; border-collapse:collapse; margin:.65rem 0; font-variant-numeric:tabular-nums; font-size:.85rem; }
.kmf-island th,.kmf-island td { border-bottom:1px solid var(--rule-soft); text-align:left; padding:.35rem .3rem; }
.kmf-ubar-controls label { display:inline-block; font-size:.9rem; margin:.45rem .6rem .3rem 0; }
.kmf-ubar-controls select { padding:.25rem .4rem; color:var(--ink-primary); background:var(--bg-paper); border:1px solid var(--rule-stone); font:inherit; }