:root {
  color-scheme:light;
  --navy:#0b2545;
  --teal:#115e59;
  --mint:#5eead4;
  --ink:#17334d;
  --muted:#4b6377;
  --line:#d5e3e9;
  --paper:#f4f8fa;
  --white:#fff;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--paper);
  font-size:17px;
  line-height:1.65}

* {
  box-sizing:border-box}
body {
  margin:0}
a {
  color:var(--teal);
  text-underline-offset:.18em}
a:hover {
  text-decoration-thickness:2px}
a:focus-visible {
  outline:3px solid var(--teal);
  outline-offset:4px;
  border-radius:3px}
.skip {
  position:absolute;
  left:1rem;
  top:-5rem;
  padding:.6rem 1rem;
  background:var(--white);
  z-index:10}
.skip:focus {
  top:1rem}
.header {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding:1.15rem clamp(1rem,4vw,4rem);
  background:var(--navy);
  border-bottom:4px solid var(--mint)}
.brand {
  display:flex;
  align-items:center;
  gap:.65rem;
  line-height:1;
  color:var(--white);
  font-size:1.3rem;
  font-weight:750;
  text-decoration:none}
.brand img {
  width:44px;
  height:44px}
.source {
  color:var(--mint);
  font-size:.85rem;
  white-space:nowrap}
.shell {
  display:grid;
  grid-template-columns:220px minmax(0,1fr);
  max-width:1540px;
  margin:auto}
.navigation {
  padding:2.5rem 1rem 2rem 1.5rem;
  display:flex;
  flex-direction:column;
  gap:.4rem;
  align-self:start;
  position:sticky;
  top:0}
.navigation a {
  padding:.55rem .85rem;
  text-decoration:none;
  border-radius:6px;
  font-size:.9rem;
  color:var(--ink)}
.navigation a:hover {
  background:#e4f1f0}
.navigation a[aria-current] {
  background:var(--navy);
  color:var(--mint);
  font-weight:650}
main {
  min-width:0;
  padding:2.6rem clamp(1.3rem,4vw,4rem) 4rem;
  background:var(--white)}
h1,h2,h3 {
  color:var(--navy);
  line-height:1.2;
  letter-spacing:-.025em;
  scroll-margin-top:1.5rem}
h1 {
  font-size:clamp(2.2rem,4.8vw,4rem);
  margin:.4rem 0 1.4rem;
  max-width:16ch}
h2 {
  font-size:1.65rem;
  margin:2.5rem 0 1rem}
h3 {
  font-size:1.2rem;
  margin:1.8rem 0 .75rem}
.eyebrow {
  color:var(--teal);
  font-size:.8rem;
  font-weight:750;
  text-transform:uppercase;
  letter-spacing:.11em}
.lead {
  font-size:1.17rem;
  max-width:53ch;
  color:var(--muted)}
.button {
  display:inline-block;
  margin:.6rem 0 1.5rem;
  background:var(--navy);
  color:var(--mint);
  padding:.7rem 1.1rem;
  border-radius:6px;
  font-weight:650;
  text-decoration:none}
.button span {
  padding-left:1.1rem}
.banner {
  width:100%;
  height:auto;
  max-width:850px;
  display:block;
  border-radius:8px;
  margin:1rem 0 2rem}
.cards {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1rem;
  max-width:950px}
.card {
  padding:1.3rem 1.5rem;
  border:1px solid var(--line);
  border-top:3px solid var(--teal);
  border-radius:8px;
  text-decoration:none;
  transition:background .12s}
.card:hover {
  background:#effaf7}
.card h3 {
  margin:0 0 .6rem}
.card p {
  color:var(--muted);
  font-size:.94rem;
  margin:0}
.card span {
  display:block;
  margin-top:.6rem;
  font-weight:750}
.note {
  color:var(--muted);
  max-width:75ch;
  font-size:.9rem;
  margin-top:2rem}
.reading {
  display:grid;
  grid-template-columns:minmax(0,78ch) minmax(150px,210px);
  gap:2.8rem}
.prose {
  min-width:0;
  overflow-wrap:anywhere}
.prose h1 {
  font-size:clamp(2rem,3vw,3rem);
  max-width:25ch}
.prose p,.prose ul,.prose ol {
  margin:1rem 0}
.prose li+li {
  margin-top:.4rem}
.prose img {
  max-width:100%;
  height:auto}
.prose pre {
  overflow-x:auto;
  padding:1.1rem 1.3rem;
  background:var(--navy);
  color:#e7f6f4;
  border-radius:7px;
  font-size:.82rem;
  line-height:1.6}
.prose code {
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:.86em}
.prose :not(pre)>code {
  background:#eaf1f4;
  padding:.1em .3em;
  border-radius:3px;
  color:var(--navy)}
.prose table {
  display:block;
  max-width:100%;
  width:max-content;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:.87rem}
.prose th,.prose td {
  text-align:left;
  padding:.65rem .85rem;
  border:1px solid var(--line)}
.prose th {
  background:var(--paper);
  font-weight:650}
.prose blockquote {
  border-left:3px solid var(--teal);
  margin:1rem 0;
  padding:.1rem 1.2rem;
  color:var(--muted)}
.contents {
  font-size:.79rem;
  align-self:start;
  position:sticky;
  top:2rem;
  max-height:90vh;
  overflow:auto;
  border-left:1px solid var(--line);
  padding-left:1rem}
.contents h2 {
  font-size:.8rem;
  margin:0 0 .75rem;
  letter-spacing:.02em}
.contents ul {
  list-style:none;
  padding:0;
  margin:0}
.contents ul ul {
  padding-left:.7rem}
.contents li {
  margin:.45rem 0}
.contents a {
  color:var(--muted);
  text-decoration:none}
.contents a:hover {
  color:var(--teal);
  text-decoration:underline}
footer {
  max-width:1540px;
  margin:auto;
  padding:1.3rem 2rem;
  border-top:1px solid var(--line);
  font-size:.8rem;
  color:var(--muted)}

@media(max-width:1150px) {
  .reading {
  display:block}
.contents {
  position:static;
  max-height:none;
  margin-top:2rem;
  padding-top:1rem;
  border-top:1px solid var(--line);
  border-left:0;
  padding-left:0}
}

@media(max-width:760px) {
  .shell {
  display:block}
.header {
  padding:.9rem 1rem}
.brand {
  font-size:1.1rem}
.brand img {
  width:36px;
  height:36px}
.navigation {
  position:static;
  display:flex;
  flex-direction:row;
  flex-wrap:wrap;
  gap:.25rem;
  padding:.8rem}
.navigation a {
  font-size:.8rem;
  padding:.35rem .6rem}
main {
  padding:1.5rem 1.2rem 3rem}
.cards {
  grid-template-columns:1fr}
.prose pre {
  margin-left:-.35rem;
  margin-right:-.35rem}
footer {
  padding:1rem}
h1 {
  max-width:18ch}
}

@media(prefers-reduced-motion:reduce) {
  .card {
  transition:none}
}