/* ========================================================================
   Indoor Mapping & Wayfinding Automation — global styles
   ======================================================================== */

:root {
  --accent-navy:  #0f3a4f;
  --accent-teal:  #1f9aa6;
  --accent-cyan:  #2cb7c4;
  --accent-mint:  #7dd3c0;
  --accent-amber: #f0a500;
  --accent-rust:  #d97706;
  --accent-rose:  #c2557a;

  --bg:          #fbfaf7;
  --surface:     #ffffff;
  --surface-2:   #f4f0ea;
  --border:      #e1dcd3;
  --border-soft: #ecead9;

  --ink:         #1c2933;
  --ink-soft:    #324252;
  --muted:       #5a6b76;
  --muted-soft:  #8a98a3;

  --code-bg:     #f4f6f8;
  --code-ink:    #1c2933;
  --code-border: #e4e9ee;

  --link:        #156c7a;
  --link-hover:  #0f3a4f;

  --shadow-sm: 0 1px 2px rgba(15, 58, 79, 0.06), 0 1px 3px rgba(15, 58, 79, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 58, 79, 0.08), 0 2px 4px rgba(15, 58, 79, 0.04);
  --shadow-lg: 0 12px 32px rgba(15, 58, 79, 0.12), 0 4px 8px rgba(15, 58, 79, 0.05);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font-sans: "Inter", "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI",
               Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --header-h: 64px;
  --container-max: 1480px;
  --content-max: 1340px;
  --gutter: clamp(1rem, 3.2vw, 2.25rem);

  --transition-fast: 140ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(15px, 0.5vw + 14px, 17px);
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img, svg { max-width: 100%; height: auto; display: block; }
hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ---- Skip link + a11y --------------------------------------------------- */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 8px; top: 8px;
  padding: 0.5rem 1rem; background: var(--accent-navy); color: #fff;
  border-radius: var(--radius-sm); z-index: 200;
  transform: translateY(-150%);
  transition: transform var(--transition);
}
.skip-link:focus { transform: translateY(0); outline: 3px solid var(--accent-amber); }

/* ---- Layout primitives ------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-narrow {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
main.site-main { flex: 1 0 auto; padding-block: clamp(1.25rem, 2vw, 2rem) clamp(2.5rem, 5vw, 4rem); }

/* ---- Site header ------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 247, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
  min-height: var(--header-h);
  display: flex;
  align-items: center;
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--accent-navy);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.02rem;
  flex-shrink: 0;
}
.site-brand svg { width: 36px; height: 36px; flex: 0 0 36px; transition: transform var(--transition); }
.site-brand:hover svg { transform: rotate(-3deg) scale(1.06); }
.site-brand strong { color: var(--accent-navy); }
.site-brand small { color: var(--muted); font-weight: 500; font-size: 0.78rem; display: block; margin-top: -2px; }

.site-nav { margin-left: auto; position: relative; }
.site-nav__toggle {
  display: none;
  appearance: none; background: var(--surface); border: 1px solid var(--border);
  color: var(--accent-navy); padding: 0.4rem 0.55rem; border-radius: var(--radius-sm);
  cursor: pointer; line-height: 0;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.site-nav__toggle:hover { background: var(--surface-2); border-color: var(--accent-teal); }
.site-nav__toggle svg { width: 22px; height: 22px; display: block; }
.site-nav ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: 0.25rem;
}
.site-nav a {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}
.site-nav a svg { width: 18px; height: 18px; flex: 0 0 18px; color: var(--accent-teal); }
.site-nav a:hover { background: var(--surface-2); color: var(--accent-navy); }
.site-nav a[aria-current="page"] {
  background: linear-gradient(135deg, rgba(31,154,166,0.14), rgba(240,165,0,0.12));
  color: var(--accent-navy);
}
.site-nav a[aria-current="page"] svg { color: var(--accent-amber); }

@media (max-width: 880px) {
  .site-nav__toggle { display: inline-flex; }
  .site-nav ul {
    display: none;
    position: absolute;
    top: var(--header-h); right: var(--gutter);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    padding: 0.5rem;
    min-width: 260px;
  }
  .site-nav[data-open="true"] ul { display: flex; }
  .site-nav a { padding: 0.6rem 0.8rem; }
}

/* ---- Footer ------------------------------------------------------------ */
.site-footer {
  background: var(--accent-navy);
  color: #d5e4ea;
  padding: 2.25rem 0 1.5rem;
  margin-top: auto;
  flex-shrink: 0;
}
.site-footer a { color: #c7e7eb; text-decoration: none; }
.site-footer a:hover { color: #f0a500; text-decoration: underline; }
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  align-items: start;
}
.site-footer__about p { margin: 0.4rem 0 0; color: #9bb6bf; max-width: 50ch; font-size: 0.92rem; }
.site-footer__about strong { color: #fff; font-size: 1rem; letter-spacing: -0.01em; }
.site-footer__links { display: grid; gap: 0.4rem; }
.site-footer__links h2 {
  color: #fff;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 0.4rem;
  border: 0;
  padding: 0;
  font-weight: 700;
  font-family: var(--font-sans);
}
.site-footer__links a { padding: 0.15rem 0; display: inline-block; font-size: 0.95rem; }
.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 1.5rem; padding-top: 1rem;
  font-size: 0.82rem; color: #8a9fa6;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
}
@media (max-width: 640px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}

/* ---- Links & buttons --------------------------------------------------- */
a { color: var(--link); text-decoration-thickness: 1px; text-underline-offset: 2px; transition: color var(--transition-fast); }
a:hover { color: var(--link-hover); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.97rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition), background var(--transition), color var(--transition);
  line-height: 1.2;
}
.btn svg { width: 22px; height: 22px; flex: 0 0 22px; }
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-navy));
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { box-shadow: var(--shadow-md); color: #fff; }

.btn-accent {
  background: linear-gradient(135deg, var(--accent-amber), var(--accent-rust));
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-accent:hover { box-shadow: var(--shadow-md); color: #fff; }

.btn-outline {
  background: var(--surface);
  border-color: var(--border);
  color: var(--ink);
}
.btn-outline:hover { background: var(--surface-2); border-color: var(--accent-teal); }

/* ---- Typography -------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--accent-navy);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 2.25em 0 0.6em;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}
h1 {
  font-size: clamp(1.6rem, 1.1rem + 2vw, 2.8rem);
  margin-top: 0.4em;
  background: linear-gradient(120deg, var(--accent-navy) 0%, var(--accent-teal) 55%, var(--accent-amber) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
  word-wrap: break-word;
  hyphens: auto;
}
h2 { font-size: clamp(1.4rem, 0.9rem + 1.2vw, 1.85rem); padding-bottom: 0.25em; border-bottom: 1px solid var(--border-soft); }
h3 { font-size: clamp(1.18rem, 0.9rem + 0.6vw, 1.4rem); color: var(--accent-teal); }
h4 { font-size: 1.1rem; color: var(--ink); }

p { margin: 0 0 1.1em; }
strong { color: var(--ink); }

/* heading permalinks — inline # next to each heading, visible on hover */
.header-anchor {
  display: inline;
  margin-left: 0.4em;
  color: var(--accent-teal);
  text-decoration: none;
  opacity: 0;
  font-weight: 400;
  letter-spacing: 0;
  transition: opacity var(--transition-fast), color var(--transition-fast);
  vertical-align: baseline;
}
.header-anchor span { font-size: 0.8em; }
h1:hover .header-anchor,
h2:hover .header-anchor,
h3:hover .header-anchor,
h4:hover .header-anchor,
.header-anchor:focus { opacity: 1; }
.header-anchor:hover { color: var(--accent-amber); }
@media (hover: none) {
  /* Always visible (but subtle) on touch devices where there is no hover */
  .header-anchor { opacity: 0.35; }
}

/* ---- Lists ------------------------------------------------------------- */
ul, ol { padding-left: 1.4em; margin: 0 0 1.1em; }
li { margin-bottom: 0.35em; }
li::marker { color: var(--accent-teal); }

/* Task lists (markdown checkbox lists) */
.contains-task-list { list-style: none; padding-left: 0.25em; }
.task-list-item { display: flex; align-items: flex-start; gap: 0.6rem; padding: 0.25rem 0; }
.task-list-item::marker { content: ""; }
.task-list-item-checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 1.15em; height: 1.15em;
  margin-top: 0.22em;
  flex: 0 0 auto;
  border: 1.6px solid var(--accent-teal);
  border-radius: 4px;
  background: var(--surface);
  cursor: pointer;
  position: relative;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.task-list-item-checkbox:hover { border-color: var(--accent-navy); }
.task-list-item-checkbox:checked {
  background: linear-gradient(135deg, var(--accent-teal), var(--accent-navy));
  border-color: var(--accent-navy);
}
.task-list-item-checkbox:checked::after {
  content: "";
  position: absolute;
  left: 3px; top: 0px;
  width: 0.35em; height: 0.65em;
  border: solid #fff;
  border-width: 0 2.2px 2.2px 0;
  transform: rotate(45deg);
}
.task-list-item label { cursor: pointer; flex: 1; }
.task-list-item input:checked + label,
.task-list-item:has(input:checked) > label,
.task-list-item:has(input:checked) { color: var(--muted-soft); }
.task-list-item:has(input:checked) > label { text-decoration: line-through; text-decoration-color: var(--muted-soft); }

/* ---- Inline code ------------------------------------------------------- */
:not(pre) > code {
  font-family: var(--font-mono);
  background: var(--surface-2);
  color: var(--accent-navy);
  padding: 0.08em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  border: none;
  font-weight: 500;
}

/* ---- Code blocks ------------------------------------------------------- */
.code-block {
  margin: 1.4em 0;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.code-block__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0.75rem 0.45rem 1rem;
  background: linear-gradient(180deg, var(--surface-2), #ece6da);
  border-bottom: 1px solid var(--code-border);
}
.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--code-ink);
  background: transparent;
}
.code-block pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }
.code-lang {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-navy);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.copy-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.copy-btn:hover { background: var(--accent-teal); color: #fff; border-color: var(--accent-teal); }
.copy-btn[data-state="copied"] { background: var(--accent-mint); color: var(--accent-navy); border-color: var(--accent-mint); }

/* Prism light theme tuned to palette */
.code-block .token.comment,
.code-block .token.prolog,
.code-block .token.doctype,
.code-block .token.cdata { color: #7a8a94; font-style: italic; }
.code-block .token.punctuation { color: #3b4c5a; }
.code-block .token.property,
.code-block .token.tag,
.code-block .token.boolean,
.code-block .token.number,
.code-block .token.constant,
.code-block .token.symbol,
.code-block .token.deleted { color: #c2557a; }
.code-block .token.selector,
.code-block .token.attr-name,
.code-block .token.string,
.code-block .token.char,
.code-block .token.builtin,
.code-block .token.inserted { color: var(--accent-rust); }
.code-block .token.operator,
.code-block .token.entity,
.code-block .token.url,
.code-block .language-css .token.string,
.code-block .style .token.string { color: var(--accent-teal); }
.code-block .token.atrule,
.code-block .token.attr-value,
.code-block .token.keyword { color: var(--accent-navy); font-weight: 600; }
.code-block .token.function,
.code-block .token.class-name { color: #156c7a; font-weight: 600; }
.code-block .token.regex,
.code-block .token.important,
.code-block .token.variable { color: var(--accent-amber); }

/* ---- Tables ------------------------------------------------------------ */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.4em 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}
.table-scroll table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}
.table-scroll thead th {
  background: linear-gradient(135deg, var(--surface-2), #ece6da);
  color: var(--accent-navy);
  text-align: left;
  font-weight: 700;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.table-scroll tbody td {
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: top;
}
.table-scroll tbody tr:nth-child(even) td { background: rgba(244,240,234,0.4); }
.table-scroll tbody tr:hover td { background: rgba(31,154,166,0.06); }
.table-scroll tbody tr:last-child td { border-bottom: 0; }

/* ---- Blockquote -------------------------------------------------------- */
blockquote {
  margin: 1.4em 0;
  padding: 0.8em 1.2em;
  border-left: 4px solid var(--accent-amber);
  background: var(--surface-2);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--ink-soft);
}
blockquote p:last-child { margin-bottom: 0; }

/* ---- FAQ / details ----------------------------------------------------- */
details.faq, details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin: 0.75em 0;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}
details[open] { box-shadow: var(--shadow-md); border-color: var(--accent-teal); }
details summary {
  cursor: pointer;
  padding: 0.85rem 1.1rem;
  font-weight: 600;
  color: var(--accent-navy);
  list-style: none;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "+";
  font-weight: 400;
  color: var(--accent-teal);
  font-size: 1.4rem;
  line-height: 1;
  transition: transform var(--transition);
  flex-shrink: 0;
}
details[open] summary::after { content: "−"; transform: rotate(0deg); color: var(--accent-amber); }
details summary:hover { color: var(--accent-teal); }
details > *:not(summary) { padding: 0 1.1rem 0.9rem; }

/* ---- Mermaid ----------------------------------------------------------- */
.mermaid {
  display: flex;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  margin: 1.4em 0;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}

/* ---- KaTeX ------------------------------------------------------------- */
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.4em 0; }
.katex { font-size: 1.05em; }

/* ---- Hero -------------------------------------------------------------- */
.hero {
  text-align: center;
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(1.5rem, 4vw, 3rem);
}
.hero__logo {
  width: clamp(140px, 18vw, 220px);
  height: auto;
  margin: 0 auto 1.5rem;
  filter: drop-shadow(0 12px 28px rgba(15, 58, 79, 0.2));
  transition: transform var(--transition);
}
.hero__logo:hover { transform: translateY(-3px) rotate(-1deg); }
.hero__title {
  font-size: clamp(1.75rem, 1.1rem + 2.6vw, 3.4rem);
  margin: 0 0 0.6rem;
  border: none;
  overflow-wrap: break-word;
  word-wrap: break-word;
  hyphens: auto;
}
.hero__tagline {
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.25rem);
  color: var(--muted);
  max-width: 64ch;
  margin: 0 auto 2rem;
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
  margin-top: 1.5rem;
}
.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--accent-navy);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition), border-color var(--transition);
}
.hero__cta svg { width: 32px; height: 32px; flex: 0 0 32px; }
.hero__cta:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-teal);
  color: var(--accent-navy);
}
.hero__cta[data-tone="cyan"]:hover { border-color: var(--accent-teal); }
.hero__cta[data-tone="navy"]:hover { border-color: var(--accent-navy); }
.hero__cta[data-tone="amber"]:hover { border-color: var(--accent-amber); }

/* ---- Section / card grid ---------------------------------------------- */
.section-intro {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(34ch, 100%), 1fr));
  gap: clamp(1rem, 2vw, 1.75rem) clamp(1.5rem, 3vw, 2.75rem);
  margin: 0 auto 2.5rem;
  font-size: clamp(1rem, 0.95rem + 0.2vw, 1.08rem);
  color: var(--ink-soft);
}
.section-intro > p { margin: 0; }
.section-intro .lead {
  grid-column: 1 / -1;
  font-size: clamp(1.05rem, 0.95rem + 0.4vw, 1.18rem);
  color: var(--ink);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(1rem, 2.5vw, 1.6rem);
  margin: 1.5rem 0;
}
.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-teal), var(--accent-amber));
  opacity: 0.65;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-teal);
}
.card__icon {
  width: 56px; height: 56px;
  margin-bottom: 0.9rem;
  border-radius: var(--radius-md);
  background: var(--surface-2);
  display: flex; align-items: center; justify-content: center;
  padding: 8px;
}
.card__icon svg { width: 100%; height: 100%; }
.card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-navy);
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}
.card__desc {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
  margin: 0;
  flex: 1;
}
.card__cta {
  margin-top: 1rem;
  color: var(--accent-teal);
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.card__cta::after {
  content: "→";
  transition: transform var(--transition-fast);
}
.card:hover .card__cta::after { transform: translateX(4px); }

/* Smaller card variant for sub-topic showcase */
.card-grid--compact .card { padding: 1.1rem; }
.card-grid--compact .card__title { font-size: 1rem; }

/* ---- Breadcrumbs ------------------------------------------------------- */
.breadcrumbs {
  margin: 0 0 1.5rem;
  font-size: 0.88rem;
  color: var(--muted);
}
.breadcrumbs ol {
  list-style: none;
  padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: 0.35rem;
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 0.35rem; margin: 0; }
.breadcrumbs li + li::before {
  content: "›";
  color: var(--muted-soft);
  margin-right: 0.15rem;
}
.breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
}
.breadcrumbs a:hover { background: var(--surface-2); color: var(--accent-navy); }
.breadcrumbs li[aria-current="page"] { color: var(--accent-navy); font-weight: 500; padding: 0.2rem 0.4rem; }

/* ---- Article ----------------------------------------------------------- */
.article {
  max-width: 78ch;
  margin: 0 auto;
}
.article--wide { max-width: var(--content-max); }

.article > h1:first-child { margin-top: 0.2em; }

/* Related pages section */
.related {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.related h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 0; padding: 0; margin: 0 0 0.8rem;
}

/* ---- Section index pages ----------------------------------------------- */
.section-header {
  text-align: left;
  margin-bottom: 2rem;
}
.section-header__eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-teal);
  background: rgba(31,154,166,0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.6rem;
}

/* ---- Utility ----------------------------------------------------------- */
.lead { font-size: 1.1rem; color: var(--ink-soft); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}