:root {
  color-scheme: light;
  --ground: #e8f1ff;
  --panel: #f7faff;
  --soft: #d3e2fb;
  --ink: #294369;
  --muted: #465b79;
  --blue: #2b55a2;
  --deep-blue: #23457d;
  --line: #a8c2e9;
  --body: "Gill Sans", "Trebuchet MS", sans-serif;
  --heading: "Didot", "Bodoni MT", "Times New Roman", serif;
}
* { box-sizing: border-box; }
html { font-size: 18px; scroll-padding-top: 2rem; }
body { margin: 0; background: var(--ground); color: var(--ink); font-family: var(--body); line-height: 1.65; overflow-wrap: anywhere; }
button, textarea { font: inherit; }
button, summary { cursor: pointer; }
button:disabled { cursor: default; }
a { color: var(--blue); text-decoration-thickness: 1.5px; text-underline-offset: .23em; }
a:hover { color: var(--deep-blue); text-decoration-thickness: 2.5px; }
a, summary, button { touch-action: manipulation; }
:focus-visible { outline: 3px solid var(--deep-blue); outline-offset: 5px; }
main:focus { outline: none; }
p { margin: 0 0 1.2rem; }
h1, h2, h3, h4, h5, h6 { font-family: var(--heading); font-weight: 400; line-height: 1.12; margin: 0; text-wrap: balance; color: var(--deep-blue); }
h1 { font-size: clamp(2.8rem, 5.3vw, 4.5rem); letter-spacing: -.02em; }
h2 { font-size: clamp(2rem, 3.3vw, 2.8rem); margin-bottom: 1.3rem; }
h3 { font-size: 1.7rem; margin-bottom: 1rem; }
img { display: block; max-width: 100%; height: auto; border-radius: 24px; }
/* The approved drawings keep their bytes; the filter gives their dark ground a light, neutral print. */
main img { filter: grayscale(1) invert(1); mix-blend-mode: multiply; }
figure { margin: 0; min-width: 0; }
figcaption { font-size: 1rem; color: var(--muted); line-height: 1.5; margin-top: 1rem; }
dl, dd { margin: 0; }
.u-shell { width: min(1192px, calc(100% - 112px)); margin-inline: auto; }
.u-measure { max-width: 66ch; }
.eyebrow { display: table; max-width: 100%; font-family: var(--body); font-size: 1rem; font-weight: 600; letter-spacing: 0; text-transform: none; line-height: 1.4; color: var(--deep-blue); background: var(--soft); border-radius: 999px; padding: 9px 17px; margin: 0 0 1.3rem; }
.scenario { font-size: 1.28rem; line-height: 1.5; color: var(--ink); max-width: 56ch; margin: 1.7rem 0 1.4rem; }
.jade-underline { text-decoration: underline; text-decoration-color: #82a8e2; text-decoration-thickness: .055em; text-underline-offset: .13em; }
.skip-link { position: absolute; z-index: 10; top: 8px; left: 16px; padding: 12px 18px; background: var(--panel); color: var(--deep-blue); border-radius: 999px; transform: translateY(-200%); min-height: 48px; }
.skip-link:focus { transform: none; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 128px; border-bottom: 2px solid var(--line); position: relative; z-index: 5; }
.wordmark { display: flex; align-items: center; gap: 16px; min-height: 56px; color: var(--deep-blue); text-decoration: none; font-family: var(--heading); font-size: 2rem; line-height: 1.1; }
.wordmark-sub { display: block; font-family: var(--body); font-size: 1rem; color: var(--muted); margin-top: 6px; letter-spacing: 0; }
.mark { width: 34px; height: 44px; border: 3px solid var(--blue); border-radius: 16px; background: var(--soft); position: relative; flex: 0 0 auto; }
.mark::before, .mark::after { content: ""; position: absolute; left: 7px; right: 7px; height: 3px; border-radius: 999px; background: var(--blue); top: 12px; }
.mark::after { top: 22px; right: 12px; }
.guide-menu { position: relative; }
.guide-menu summary { display: flex; align-items: center; gap: 16px; min-height: 52px; padding: 8px 8px 8px 22px; font-size: 1rem; list-style: none; color: var(--deep-blue); border-radius: 999px; background: var(--soft); }
.guide-menu summary::-webkit-details-marker { display: none; }
.menu-glyph { display: grid; place-items: center; border-radius: 50%; width: 40px; height: 40px; color: var(--panel); background: var(--blue); font-size: 1.5rem; flex-shrink: 0; }
.guide-menu[open] .menu-glyph { transform: rotate(45deg); }
.guide-menu nav { position: absolute; top: calc(100% + 14px); right: 0; width: 350px; max-width: calc(100vw - 40px); padding: 12px; background: var(--panel); border: 2px solid var(--line); border-radius: 24px; box-shadow: 0 16px 36px #263f6514; }
.guide-menu nav a { display: block; min-height: 76px; padding: 12px 16px; color: var(--deep-blue); text-decoration: none; border-radius: 16px; }
.guide-menu nav a:hover, .guide-menu nav a[aria-current] { background: var(--soft); }
.guide-menu nav a[aria-current] > span:first-child { text-decoration: underline; text-underline-offset: .2em; }
.menu-hint { display: block; color: var(--muted); font-size: 1rem; }
main { padding-block: 64px 80px; }
.source-link { display: inline-flex; align-items: center; min-height: 44px; padding-block: 8px; font-size: 1rem; margin-right: 10px; }
.primary-link, .text-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 52px; font-size: 1.05rem; }
.primary-link { font-family: var(--body); font-weight: 600; background: var(--blue); color: #fff; border: 2px solid var(--blue); border-radius: 999px; padding: 14px 24px; text-decoration: none; }
.primary-link:hover { background: var(--deep-blue); border-color: var(--deep-blue); color: #fff; }
.text-link { padding-block: 10px; }
.next-card { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 30px 36px; border-radius: 28px; background: var(--soft); margin-top: 64px; text-decoration: none; color: var(--deep-blue); }
.next-card:hover { background: #c7daf7; }
.next-card .eyebrow { padding: 0; background: transparent; margin: 0 0 10px; font-weight: 400; }
.next-label { display: block; font-family: var(--heading); font-size: 1.9rem; line-height: 1.25; text-decoration: underline; text-underline-offset: .2em; text-decoration-thickness: 1px; }
.next-card > span:last-child { font-size: 2rem; color: var(--blue); }
.site-footer { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; padding-block: 36px 48px; border-top: 2px solid var(--line); }
.site-footer p { max-width: 46ch; font-size: 1rem; color: var(--muted); }
.site-footer nav { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 24px; }
.site-footer nav a { display: flex; align-items: center; min-height: 48px; font-size: 1rem; padding: 8px 0; }
@media (max-width: 760px) {
  .u-shell { width: calc(100% - 40px); }
  .site-header { min-height: 116px; gap: 12px; }
  .wordmark { gap: 10px; font-size: 1.65rem; }
  .wordmark-sub { font-size: .95rem; max-width: 14ch; }
  .mark { width: 28px; height: 38px; }
  .mark::before, .mark::after { left: 5px; right: 5px; }
  .mark::after { right: 8px; top: 21px; }
  .guide-menu summary { gap: 8px; padding: 8px 8px 8px 13px; font-size: .95rem; max-width: 146px; line-height: 1.3; }
  .menu-glyph { width: 32px; height: 32px; }
  .guide-menu nav { right: 0; width: 350px; }
  main { padding-block: 38px 56px; }
  h1 { font-size: clamp(2.5rem, 10vw, 3.1rem); }
  h2 { font-size: 2.1rem; }
  h3 { font-size: 1.65rem; }
  .scenario { font-size: 1.2rem; }
  .eyebrow { font-size: .95rem; padding: 8px 14px; }
  .primary-link { gap: 18px; padding: 13px 20px; }
  .site-footer { grid-template-columns: 1fr; gap: 18px; padding-bottom: 32px; }
  .site-footer nav { column-gap: 16px; }
  .next-card { margin-top: 42px; padding: 26px 22px; gap: 20px; }
  .next-label { font-size: 1.7rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}