:root {
  color-scheme: light;
  --paper: #faf9f6;
  --ink: #223247;
  --blue: #244f88;
  --muted: #627083;
  --line: #d9dee3;
  --serif: Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 28px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.7 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--blue); text-underline-offset: 4px; }
a:hover { color: #123459; }
a:focus-visible, summary:focus-visible { outline: 3px solid #638dbe; outline-offset: 6px; border-radius: 2px; }
.page { width: min(1160px, 100% - 96px); margin: 0 auto; }
.skip-link { position: absolute; left: 20px; top: -100px; padding: 10px 20px; background: white; z-index: 5; }
.skip-link:focus { top: 12px; }
.masthead { display: flex; justify-content: space-between; align-items: center; gap: 28px; padding: 25px 0 24px; border-bottom: 1px solid var(--line); }
.wordmark { color: var(--blue); font: 38px/1 var(--serif); letter-spacing: -1.5px; text-decoration: none; white-space: nowrap; }
.wordmark span { font: 11px var(--mono); letter-spacing: 2px; margin-left: 10px; }
nav { display: flex; align-items: center; gap: 36px; font-size: 12px; }
nav a { text-decoration: none; }
nav a span { margin-left: 8px; }
.edition, .small-label, .eyebrow, dt { font: 10px/1.6 var(--mono); letter-spacing: 1.6px; }
.edition { color: var(--muted); border-left: 1px solid var(--line); padding-left: 28px; }
.welcome { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: clamp(32px, 6vw, 100px); align-items: center; padding: 65px 18px 58px 0; }
.eyebrow { margin: 0 0 24px; color: var(--blue); }
.status-dot { display: inline-block; width: 6px; height: 6px; margin: 0 9px 1px 0; background: #3e7867; border-radius: 50%; }
h1 { margin: 0; font: normal clamp(48px, 5.3vw, 72px)/1.09 var(--serif); letter-spacing: -2.8px; }
h1 em, h2 em { color: var(--blue); font-weight: normal; }
.intro { max-width: 480px; margin: 24px 0 28px; color: var(--muted); font-size: 16px; line-height: 1.85; }
.primary-link { display: inline-flex; align-items: center; gap: 32px; border: 1px solid var(--blue); padding: 11px 19px; background: var(--blue); color: white; text-decoration: none; font-size: 12px; transition: background .15s; }
.primary-link:hover { background: #173b68; color: white; }
.welcome-note { margin: 20px 0 0; font: 9px/1.7 var(--mono); color: var(--muted); letter-spacing: .2px; }
.portrait { margin: 0; transform: rotate(1.5deg); }
.portrait a { display: block; background: white; padding: 9px; border: 1px solid #cbd3dd; box-shadow: 8px 8px 0 #e9edf0; }
.portrait img { display: block; width: 100%; max-width: 270px; height: auto; }
.portrait figcaption { margin-top: 19px; text-align: center; font: italic 12px var(--serif); color: var(--muted); }
.clock-strip { padding: 27px 30px; background: #edf1f5; border-top: 2px solid var(--blue); display: flex; align-items: center; justify-content: space-between; gap: 25px; flex-wrap: wrap; }
.small-label { color: var(--blue); }
.clock-heading p { margin: 5px 0 0; font-size: 11px; color: var(--muted); max-width: 300px; }
.clock-values { display: grid; grid-template-columns: 1.45fr 1fr 1fr; gap: 32px; margin: 0; }
dt { color: var(--muted); font-size: 9px; letter-spacing: 1px; }
dd { margin: 5px 0 0; font: 18px/1.4 var(--mono); color: var(--ink); font-variant-numeric: tabular-nums; white-space: nowrap; }
.clock-explanation { margin: 0; font-size: 12px; }
.getting-started { padding: 65px 0 0; }
.section-heading { max-width: 630px; }
.section-heading .eyebrow { margin-bottom: 14px; }
h2 { margin: 0; font: normal 37px/1.25 var(--serif); letter-spacing: -1px; }
.section-heading > p:last-child { color: var(--muted); max-width: 520px; margin: 17px 0 0; font-size: 14px; }
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 65px; margin-top: 35px; align-items: start; }
.steps { list-style: none; counter-reset: steps; padding: 0; margin: 0; }
.steps li { counter-increment: steps; position: relative; padding: 0 0 25px 44px; }
.steps li::before { content: "0" counter(steps); position: absolute; top: 3px; left: 0; color: var(--blue); font: 12px var(--mono); }
h3 { margin: 0 0 8px; font-size: 15px; font-weight: 600; letter-spacing: -.1px; }
.steps p { margin: 0; color: var(--muted); font-size: 13px; }
.steps .example { margin-top: 10px; font-size: 12px; }
code { font-family: var(--mono); font-size: .89em; overflow-wrap: anywhere; }
p code { color: #35557b; background: #eaf0f4; padding: 2px 4px; border-radius: 2px; }
.directory { min-width: 0; background: white; border: 1px solid var(--line); }
.directory-top { padding: 18px 21px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.directory-top h3 { font: normal 19px var(--serif); margin: 0; }
.directory-top > span { font: 8px var(--mono); letter-spacing: 1px; color: var(--muted); }
pre { margin: 0; overflow-x: auto; font: 12px/1.9 var(--mono); }
pre code { font-size: inherit; overflow-wrap: normal; }
.directory > pre { padding: 20px 22px 12px; color: #405674; }
.directory pre span { color: #7b8795; }
.directory pre .tree-root { color: var(--blue); }
.directory pre strong { font-weight: 600; color: var(--blue); }
.directory-note { margin: 0; padding: 0 22px 20px; color: var(--muted); font-size: 11px; }
.snippet { background: #f3f5f7; padding: 16px 22px 18px; border-top: 1px solid var(--line); }
.snippet .small-label { font-size: 8px; letter-spacing: 1px; }
.snippet pre { font-size: 10px; margin-top: 10px; }
.source-details { margin-top: 25px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; padding: 19px 0; font-size: 12px; color: var(--blue); display: flex; justify-content: space-between; align-items: center; gap: 20px; }
summary::-webkit-details-marker { display: none; }
summary > span { font: 21px/1 var(--mono); }
details[open] summary > span { transform: rotate(45deg); }
.source-content { padding: 0 0 22px; max-width: 840px; font-size: 12px; color: var(--muted); }
.source-content pre { padding: 14px 18px; background: #edf1f5; font-size: 11px; color: var(--ink); }
.closing { margin: 50px 0; display: flex; gap: 25px; align-items: center; }
.closing-mark { font: italic 58px/1 var(--serif); color: #829ec3; flex-shrink: 0; }
.closing h2 { font-size: 23px; letter-spacing: -.4px; }
.closing p { margin: 7px 0 0; font-size: 12px; color: var(--muted); max-width: 680px; }
footer { border-top: 1px solid var(--line); padding: 24px 0 30px; display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; font: 9px/1.8 var(--mono); color: var(--muted); }
footer span span { margin: 0 9px; color: #a8b1bd; }
footer a { text-decoration: none; }
@media (min-width: 1450px) { .welcome { padding-top: 80px; padding-bottom: 70px; } }
@media (max-width: 1000px) {
  .page { width: calc(100% - 64px); }
  .welcome { grid-template-columns: minmax(0, 1fr) 240px; gap: 35px; padding-right: 5px; }
  h1 { font-size: 50px; letter-spacing: -2px; }
  .clock-strip { padding: 23px; gap: 22px; }
  .clock-heading { width: 100%; }
  .clock-heading p { max-width: none; }
  .clock-values { width: 100%; gap: 25px; }
  .guide-grid { gap: 30px; }
  .directory-top { flex-wrap: wrap; }
}
@media (max-width: 650px) {
  .page { width: calc(100% - 40px); }
  .masthead { padding: 22px 0; gap: 14px; }
  .wordmark { font-size: 32px; }
  .wordmark span { font-size: 9px; margin-left: 7px; }
  nav { gap: 0; font-size: 11px; }
  .edition { display: none; }
  .welcome { display: flex; flex-direction: column; align-items: stretch; padding: 38px 0 32px; gap: 30px; }
  .eyebrow { font-size: 8px; letter-spacing: 1.2px; margin-bottom: 18px; }
  h1 { font-size: clamp(36px, 8.5vw, 53px); letter-spacing: -1.7px; }
  .intro { margin: 20px 0 23px; font-size: 14px; }
  .welcome-note { font-size: 8px; }
  .portrait { width: 220px; max-width: 75%; align-self: center; }
  .portrait figcaption { margin-top: 15px; }
  .clock-strip { padding: 20px 18px; }
  .clock-values { grid-template-columns: 1fr 1fr; gap: 18px 15px; }
  .clock-values > div:first-child { grid-column: 1 / -1; }
  dd { font-size: 17px; }
  .getting-started { padding-top: 40px; }
  h2 { font-size: 30px; }
  .section-heading > p:last-child { font-size: 13px; }
  .guide-grid { grid-template-columns: 1fr; gap: 14px; margin-top: 29px; }
  .steps li { padding-left: 36px; }
  .directory-top { flex-wrap: nowrap; }
  .directory-top > span { font-size: 7px; }
  .directory pre { font-size: 11px; }
  .snippet pre { font-size: 9px; }
  .closing { margin: 35px 0; align-items: flex-start; gap: 15px; }
  .closing-mark { font-size: 44px; }
  .closing h2 { font-size: 21px; }
  footer { gap: 10px 25px; font-size: 8px; }
  footer > span:nth-child(2) { width: 100%; order: 3; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .primary-link { transition: none; } }