/* Altumbase — shared stylesheet
   Seed 5 visual language: warm paper ground, deep teal-green primary,
   terracotta accent, separation by border, serif headings + humanist sans body,
   wide-with-sidebar layout on reference pages. */

:root {
  --paper: #f4f1e9;
  --surface: #ffffff;
  --ink: #22282a;
  --ink-soft: #495155;
  --primary: #1f5c54;
  --primary-dark: #164039;
  --accent: #a8472c;
  --accent-dark: #8a3a23;
  --line: #d8d2c4;
  --line-strong: #bcb5a3;
  --tint: #ecf1ef;
  --tint-warm: #f6efe6;
  --focus: #0b6a8f;
  --radius: 4px;
  --maxw: 1120px;
  --gap: clamp(1rem, 2.5vw, 2rem);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, h4 {
  font-family: "Spectral", Georgia, "Times New Roman", serif;
  color: var(--primary-dark);
  line-height: 1.2;
  font-weight: 600;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(1.9rem, 4.2vw, 2.7rem); }
h2 { font-size: clamp(1.45rem, 3vw, 1.9rem); margin-top: 1.8em; }
h3 { font-size: 1.25rem; margin-top: 1.6em; }
h4 { font-size: 1.05rem; margin-top: 1.4em; }

p { margin: 0 0 1.1em; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.3em; }
li { margin: 0.3em 0; }

a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--accent-dark); }
a:focus-visible,
button:focus-visible,
summary:focus-visible,
.menu-toggle:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

img, svg { max-width: 100%; height: auto; }

/* ---- Skip link ---- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary-dark);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 200;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---- Layout container ---- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gap); }

/* ---- Header / nav ---- */
.site-header {
  background: var(--surface);
  border-bottom: 2px solid var(--primary-dark);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: "Spectral", Georgia, serif;
  font-weight: 600;
  font-size: 1.35rem;
  color: var(--primary-dark);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.brand:hover { color: var(--primary-dark); }
.brand .mark {
  display: inline-grid;
  place-items: center;
  width: 34px; height: 34px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.brand .tagline {
  display: block;
  font-family: "Source Sans 3", sans-serif;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.menu-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.5rem 0.7rem;
  font: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  cursor: pointer;
  align-items: center;
  gap: 0.4rem;
}
.menu-toggle .bars { display: inline-block; width: 18px; height: 2px; background: var(--ink); position: relative; }
.menu-toggle .bars::before,
.menu-toggle .bars::after { content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink); }
.menu-toggle .bars::before { top: -6px; }
.menu-toggle .bars::after { top: 6px; }

.menu { display: flex; }
.menu ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.menu a {
  display: block;
  padding: 0.45rem 0.6rem;
  text-decoration: none;
  color: var(--ink);
  border-radius: var(--radius);
  font-size: 0.97rem;
}
.menu a:hover { background: var(--tint); color: var(--primary-dark); }
.menu a[aria-current="page"] {
  color: var(--primary-dark);
  box-shadow: inset 0 -2px 0 var(--accent);
  font-weight: 600;
}

@media (max-width: 860px) {
  .menu-toggle { display: inline-flex; }
  .menu {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    background: var(--surface);
    border-bottom: 2px solid var(--primary-dark);
    padding: 0.5rem var(--gap) 1rem;
  }
  .menu.open { display: block; }
  .menu ul { flex-direction: column; align-items: stretch; gap: 0; }
  .menu a { padding: 0.7rem 0.4rem; border-bottom: 1px solid var(--line); }
  .menu a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--accent); }
}

/* ---- Main / content ---- */
main { display: block; }
.section { padding: 2.2rem 0; }
.section + .section { border-top: 1px solid var(--line); }

.page-head { padding: 2.4rem 0 1.4rem; background: var(--tint-warm); border-bottom: 1px solid var(--line); }
.page-head p.lede { font-size: 1.18rem; color: var(--ink-soft); max-width: 62ch; margin-bottom: 0; }
.breadcrumb { font-size: 0.85rem; color: var(--ink-soft); margin-bottom: 0.8rem; }
.breadcrumb a { color: var(--ink-soft); }

/* Wide-with-sidebar reference layout */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 3rem);
  padding: 2rem 0 2.6rem;
}
@media (min-width: 960px) {
  .layout.has-side { grid-template-columns: 230px minmax(0, 1fr); }
  .layout.has-side .toc-side { order: -1; }
}
article { max-width: 72ch; }
article h2 { scroll-margin-top: 5rem; }
article h3 { scroll-margin-top: 5rem; }

/* In-page contents */
.toc-side { align-self: start; }
@media (min-width: 960px) { .toc-side { position: sticky; top: 5rem; } }
.toc-side nav { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 1rem 1.1rem; }
.toc-side h2 { font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft); margin: 0 0 0.6rem; font-family: "Source Sans 3", sans-serif; }
.toc-side ul { list-style: none; margin: 0; padding: 0; }
.toc-side li { margin: 0.1rem 0; }
.toc-side a { display: block; padding: 0.28rem 0; font-size: 0.92rem; text-decoration: none; color: var(--ink-soft); }
.toc-side a:hover { color: var(--accent-dark); }

/* ---- Hero (homepage) ---- */
.hero { background: linear-gradient(180deg, var(--tint) 0%, var(--paper) 100%); border-bottom: 1px solid var(--line); }
.hero .container { padding-top: 2.8rem; padding-bottom: 2.4rem; }
.hero .kicker { font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--primary); font-weight: 700; margin: 0 0 0.6rem; font-family: "Source Sans 3", sans-serif; }
.hero h1 { max-width: 20ch; }
.hero p.intro { font-size: 1.2rem; color: var(--ink-soft); max-width: 60ch; }
.keypoints { list-style: none; padding: 0; margin: 1.6rem 0 0; display: grid; gap: 0.9rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.keypoints li { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: var(--radius); padding: 0.9rem 1rem; margin: 0; font-size: 0.98rem; }
.keypoints strong { display: block; color: var(--primary-dark); font-family: "Spectral", serif; font-size: 1.05rem; margin-bottom: 0.15rem; }

/* ---- Cards / grids ---- */
.grid { display: grid; gap: 1.2rem; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem 1.4rem; }
.card h3 { margin-top: 0; }
.card p:last-child { margin-bottom: 0; }
.card .more { font-weight: 600; text-decoration: none; }
.card .more::after { content: " →"; }

/* ---- Callout / panels ---- */
.callout {
  border: 1px solid var(--line-strong);
  border-left: 5px solid var(--primary);
  background: var(--tint);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin: 1.6rem 0;
}
.callout.warn { border-left-color: var(--accent); background: var(--tint-warm); }
.callout h3, .callout h4 { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

/* ---- Disclosure box (prominent, never small print) ---- */
.disclosure {
  background: var(--tint-warm);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin: 1.8rem 0;
}
.disclosure h2, .disclosure h3 { margin-top: 0; color: var(--accent-dark); font-size: 1.15rem; }
.disclosure p:last-child { margin-bottom: 0; }
.disclosure-inline {
  display: block;
  font-size: 0.92rem;
  color: var(--ink-soft);
  border-left: 3px solid var(--accent);
  padding: 0.35rem 0 0.35rem 0.7rem;
  margin: 0.5rem 0 1.1rem;
}

/* ---- Affiliate CTA ---- */
.cta-row { margin: 1.2rem 0 0.4rem; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.75rem 1.3rem;
  border-radius: var(--radius);
  border: 1px solid var(--accent-dark);
}
.btn:hover { background: var(--accent-dark); color: #fff; }
.btn.secondary { background: var(--surface); color: var(--primary-dark); border-color: var(--line-strong); }
.btn.secondary:hover { background: var(--tint); color: var(--primary-dark); }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; margin: 1.4rem 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 520px; background: var(--surface); }
caption { text-align: left; font-size: 0.9rem; color: var(--ink-soft); padding: 0.7rem 0.9rem; }
th, td { text-align: left; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 0.97rem; }
thead th { background: var(--primary); color: #fff; border-bottom: none; font-family: "Source Sans 3", sans-serif; }
tbody tr:nth-child(even) { background: var(--tint); }
th[scope="row"] { font-weight: 600; color: var(--primary-dark); }

/* ---- Definition list / glossary ---- */
.deflist { border-top: 1px solid var(--line); margin: 1.4rem 0; }
.deflist dt { font-family: "Spectral", serif; font-weight: 600; color: var(--primary-dark); font-size: 1.12rem; padding-top: 1rem; }
.deflist dd { margin: 0.3rem 0 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--line); }
.glossary-strip { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 1rem 0 1.6rem; padding: 0; list-style: none; }
.glossary-strip a { display: inline-block; padding: 0.3rem 0.7rem; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 999px; text-decoration: none; font-size: 0.9rem; }
.glossary-strip a:hover { background: var(--tint); }

/* ---- Accordion (FAQ) ---- */
.accordion { margin: 1.4rem 0; }
.accordion details { border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 0.7rem; background: var(--surface); }
.accordion summary {
  cursor: pointer;
  padding: 0.9rem 1.1rem;
  font-weight: 600;
  color: var(--primary-dark);
  font-family: "Spectral", serif;
  font-size: 1.08rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: "+"; font-size: 1.4rem; color: var(--accent); line-height: 1; }
.accordion details[open] summary::after { content: "–"; }
.accordion .body { padding: 0 1.1rem 1rem; }
.accordion .body p:last-child { margin-bottom: 0; }

/* ---- Checklist / procedure ---- */
.checklist { list-style: none; padding: 0; margin: 1.2rem 0; }
.checklist li { position: relative; padding-left: 1.9rem; margin: 0.6rem 0; }
.checklist li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--primary); font-weight: 700; }
ol.procedure { counter-reset: step; list-style: none; padding: 0; }
ol.procedure > li { counter-increment: step; position: relative; padding-left: 2.6rem; margin: 0.9rem 0; }
ol.procedure > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0;
  width: 1.8rem; height: 1.8rem;
  background: var(--primary); color: #fff;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 700; font-size: 0.9rem;
  font-family: "Source Sans 3", sans-serif;
}

/* ---- Related reading ---- */
.related { background: var(--tint); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.4rem; margin: 2rem 0 0; }
.related h2 { margin-top: 0; font-size: 1.2rem; }
.related ul { margin: 0; padding-left: 1.2rem; }

/* ---- Decorative inline SVG figure ---- */
.figure { margin: 1.6rem 0; }
.figure svg { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.figure figcaption { font-size: 0.85rem; color: var(--ink-soft); margin-top: 0.5rem; }

/* ---- Footer ---- */
.site-footer { background: var(--primary-dark); color: #e8ede9; margin-top: 2.5rem; padding: 2.4rem 0 2rem; font-size: 0.94rem; }
.site-footer a { color: #cfe6df; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; gap: 1.6rem 2.2rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.publisher p { margin: 0.15rem 0; }
.publisher .site-name { font-family: "Spectral", serif; font-size: 1.2rem; color: #fff; margin-bottom: 0.4rem; }
.footer-nav ul { list-style: none; margin: 0; padding: 0; }
.footer-nav li { margin: 0.3rem 0; }
.footer-legal { grid-column: 1 / -1; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 1.2rem; margin-top: 0.4rem; }
.footer-legal p { margin: 0.5rem 0; color: #cdd8d3; font-size: 0.88rem; }
.policy-links { margin: 0.6rem 0 !important; }
.policy-links a { margin-right: 0.3rem; }

/* ---- Utility ---- */
.muted { color: var(--ink-soft); }
.small { font-size: 0.88rem; }
.mt0 { margin-top: 0; }
.center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }