/* True Aspect reference library - shared stylesheet.
   Palette: deep navy, pale stone, sea-green. System fonts only. */

:root {
  --navy: #0e2740;
  --navy-deep: #081a2c;
  --stone: #f3f1ec;
  --stone-deep: #e6e2d9;
  --sea: #17604f;
  --sea-light: #d9eae4;
  --ink: #16212c;
  --ink-soft: #41505d;
  --rule: #c9cfd5;
  --white: #ffffff;
  --content: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

code, kbd, .term {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

a { color: #0d4f6e; }
a:hover { color: var(--sea); }
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--sea);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: var(--white);
  padding: 10px 16px;
  z-index: 50;
}
.skip-link:focus {
  left: 0;
}

/* ---------- Masthead ---------- */

.masthead {
  background: var(--navy);
  color: var(--white);
  padding: 14px 20px;
}
.masthead-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 20px;
}
.masthead a { color: var(--white); }
.site-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}
.site-name span {
  color: #9fd3c2;
  font-weight: 400;
}
.masthead-link {
  font-size: 15px;
  margin-left: auto;
}

/* ---------- Frame ---------- */

.frame {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px;
  display: block;
}

@media (min-width: 900px) {
  .frame {
    display: grid;
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
}

/* ---------- Sidebar ---------- */

.nav-toggle {
  display: block;
  width: 100%;
  margin: 18px 0 0;
  padding: 11px 14px;
  background: var(--stone);
  color: var(--ink);
  border: 0;
  border-radius: 2px;
  font: inherit;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.nav-toggle::after {
  content: " +";
}
.nav-toggle[aria-expanded="true"]::after {
  content: " \2212";
}

.sidebar {
  background: var(--stone);
  padding: 20px 18px;
  border-radius: 2px;
  display: none;
  margin-top: 6px;
}
.sidebar.is-open { display: block; }

.sidebar h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--ink-soft);
  margin: 0 0 10px;
}
.sidebar h2 + ul { margin-bottom: 26px; }
.sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar li { margin: 0 0 2px; }
.sidebar a {
  display: block;
  padding: 5px 8px;
  border-radius: 2px;
  color: var(--ink);
  text-decoration: none;
  font-size: 15.5px;
  line-height: 1.4;
}
.sidebar a:hover {
  background: var(--stone-deep);
  color: var(--navy-deep);
}
.sidebar a[aria-current="page"] {
  background: var(--sea-light);
  color: var(--navy-deep);
  font-weight: 600;
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .sidebar {
    display: block;
    position: sticky;
    top: 20px;
    margin-top: 28px;
  }
}

/* ---------- Main ---------- */

main {
  max-width: var(--content);
  padding: 24px 0 56px;
}

h1 {
  font-size: 32px;
  line-height: 1.22;
  margin: 10px 0 14px;
  color: var(--navy-deep);
  letter-spacing: -0.01em;
}
h2 {
  font-size: 23px;
  line-height: 1.3;
  margin: 38px 0 10px;
  color: var(--navy-deep);
}
h3 {
  font-size: 18.5px;
  margin: 26px 0 8px;
  color: var(--navy-deep);
}
p { margin: 0 0 15px; }

main ul, main ol { margin: 0 0 16px; padding-left: 22px; }
main li { margin-bottom: 7px; }

.lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink);
}

.breadcrumb {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 4px;
}

/* ---------- Disclosure ---------- */

.disclosure {
  background: var(--sea-light);
  padding: 16px 18px;
  border-radius: 2px;
  margin: 22px 0;
}
.disclosure p { margin: 0 0 10px; }
.disclosure p:last-child { margin-bottom: 0; }
.disclosure h2 {
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.link-note {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 6px 0 18px;
}

.offer-link {
  font-weight: 600;
}

/* ---------- Callout ---------- */

.callout {
  background: var(--stone);
  padding: 16px 18px;
  border-radius: 2px;
  margin: 24px 0;
}
.callout h3 {
  margin: 0 0 6px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--sea);
}
.callout p:last-child, .callout ul:last-child { margin-bottom: 0; }

/* ---------- Quick answer ---------- */

.quick-answer {
  background: var(--navy);
  color: #eef3f7;
  padding: 18px 20px;
  border-radius: 2px;
  margin: 0 0 26px;
}
.quick-answer h2 {
  color: #9fd3c2;
  margin: 0 0 8px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.quick-answer p { margin: 0; }
.quick-answer a { color: #bfe3f5; }

/* ---------- Definition lists ---------- */

dl.index-list {
  margin: 0 0 24px;
}
dl.index-list dt {
  font-weight: 700;
  margin-top: 16px;
  color: var(--navy-deep);
}
dl.index-list dd {
  margin: 2px 0 0;
  color: var(--ink-soft);
}

@media (min-width: 680px) {
  dl.index-list {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    column-gap: 26px;
    row-gap: 0;
  }
  dl.index-list dt {
    grid-column: 1;
    margin-top: 0;
    padding: 9px 0;
    background: var(--stone);
    padding-left: 10px;
    border-radius: 2px;
  }
  dl.index-list dd {
    grid-column: 2;
    padding: 9px 0;
  }
}

dl.terms dt {
  font-weight: 700;
  margin-top: 14px;
  color: var(--navy-deep);
}
dl.terms dd { margin: 2px 0 0; }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; margin: 0 0 22px; }

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 16px;
}
caption {
  text-align: left;
  font-size: 15px;
  color: var(--ink-soft);
  padding-bottom: 8px;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  vertical-align: top;
}
thead th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}
tbody tr:nth-child(odd) td,
tbody tr:nth-child(odd) th {
  background: var(--stone);
}
tbody th {
  font-weight: 600;
  color: var(--navy-deep);
}

/* ---------- Key terms aside ---------- */

.key-terms {
  background: var(--stone);
  padding: 18px 20px;
  border-radius: 2px;
  margin: 28px 0;
}
.key-terms h2 {
  margin: 0 0 8px;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.key-terms dl { margin: 0; }
.key-terms dt {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 600;
  margin-top: 12px;
  color: var(--navy-deep);
}
.key-terms dt:first-child { margin-top: 0; }
.key-terms dd { margin: 2px 0 0; font-size: 16px; }

/* ---------- A to Z strip ---------- */

.az-strip {
  background: var(--stone);
  padding: 16px 18px;
  border-radius: 2px;
  margin: 20px 0 26px;
  font-size: 16px;
}
.az-strip p { margin: 0; }
.az-strip .term {
  font-weight: 600;
  color: var(--navy-deep);
}

/* ---------- Related entries ---------- */

.related {
  background: var(--stone);
  padding: 18px 20px;
  border-radius: 2px;
  margin: 34px 0 0;
}
.related h2 {
  margin: 0 0 10px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}
.related ul { list-style: none; margin: 0; padding: 0; }
.related li { margin-bottom: 8px; }
.related span {
  display: block;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---------- Diagram ---------- */

.diagram {
  margin: 22px 0 26px;
  background: var(--stone);
  padding: 14px;
  border-radius: 2px;
}
.diagram svg { width: 100%; height: auto; display: block; }

/* ---------- Footer ---------- */

.site-footer {
  background: var(--navy-deep);
  color: #dde5ec;
  padding: 30px 20px 38px;
  font-size: 15px;
  line-height: 1.6;
}
.site-footer a { color: #bfe3f5; }
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  display: block;
}
.footer-col p { margin: 0 0 4px; }
.footer-col + .footer-col { margin-top: 22px; }
.footer-name {
  font-weight: 700;
  color: var(--white);
  font-size: 17px;
}
.footer-links { margin: 0 0 12px; }
.footer-trademark, .footer-checked {
  color: #b7c4d0;
}
.footer-checked { margin-top: 10px; }

@media (min-width: 820px) {
  .footer-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
  }
  .footer-col + .footer-col { margin-top: 0; }
}

/* ---------- Legal pages ---------- */

.effective-date {
  font-weight: 600;
  color: var(--navy-deep);
  margin-bottom: 20px;
}