:root {
  color-scheme: dark;
  --ink: #f5f7f9;
  --muted: #b6c0ca;
  --quiet: #83909c;
  --night: #0d1218;
  --night-raised: #141c24;
  --line: rgba(210, 224, 235, 0.16);
  --rain: #9fc9d8;
  --rain-soft: rgba(159, 201, 216, 0.14);
  --glow: #d6a55d;
  --focus: #e7bd78;
  --max-width: 46rem;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--night);
}

body {
  min-width: 20rem;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% 0%, rgba(62, 99, 115, 0.3), transparent 28rem),
    radial-gradient(circle at 4% 18%, rgba(88, 107, 102, 0.16), transparent 25rem),
    var(--night);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: #d1edf5;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #ffffff;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  z-index: 10;
  top: -5rem;
  left: 1rem;
  padding: 0.55rem 0.75rem;
  color: #111820;
  background: var(--focus);
  border-radius: 4px;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(13, 18, 24, 0.92);
}

.header-inner,
main,
.footer-inner {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: #fbfcfd;
  background: #1c2a33;
  border: 1px solid rgba(188, 222, 232, 0.42);
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.25rem rgba(159, 201, 216, 0.08), 0 0 1rem rgba(159, 201, 216, 0.12);
  font-size: 0.73rem;
  line-height: 1;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.7rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a {
  color: var(--muted);
  font-size: 0.91rem;
  font-weight: 600;
  text-decoration: none;
}

nav a[aria-current="page"],
nav a:hover {
  color: var(--ink);
}

main {
  padding: 3.5rem 0 4rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--rain);
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: #ffffff;
  font-weight: 700;
  line-height: 1.18;
}

h1 {
  max-width: 20ch;
  margin: 0;
  font-size: clamp(2rem, 6vw, 3rem);
}

h2 {
  margin: 2.8rem 0 0.75rem;
  font-size: 1.28rem;
}

h3 {
  margin: 1.75rem 0 0.35rem;
  font-size: 1.05rem;
}

p,
li {
  max-width: 68ch;
}

p {
  margin: 0.75rem 0;
}

ul,
ol {
  margin: 0.75rem 0;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.35rem;
}

.lede {
  max-width: 43rem;
  margin-top: 1.15rem;
  color: #d9e0e6;
  font-size: 1.12rem;
}

.section-rule {
  height: 1px;
  margin: 2.8rem 0 0;
  background: var(--line);
  border: 0;
}

.link-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.link-list a {
  display: block;
  min-height: 5.4rem;
  padding: 1rem;
  color: var(--ink);
  background: rgba(20, 28, 36, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
}

.link-list a:hover {
  border-color: rgba(159, 201, 216, 0.5);
  background: rgba(28, 42, 51, 0.9);
}

.link-list span {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 400;
}

.note {
  padding-left: 1rem;
  color: var(--muted);
  border-left: 2px solid var(--rain);
}

.definition-list {
  margin: 1rem 0;
}

.definition-list dt {
  margin-top: 1rem;
  color: #ffffff;
  font-weight: 700;
}

.definition-list dd {
  margin: 0.2rem 0 0;
  color: var(--muted);
}

.effective-date {
  color: var(--muted);
}

.site-footer {
  padding: 2rem 0;
  color: var(--quiet);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.86rem;
}

.footer-inner p {
  margin: 0;
}

.footer-inner ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-inner a {
  color: var(--muted);
}

@media (max-width: 38rem) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 0.85rem 0;
  }

  nav ul {
    justify-content: flex-start;
  }

  main {
    padding-top: 2.5rem;
  }

  .link-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}