@font-face {
  font-family: Garamond;
  src: url("/fonts/ITCGaramondStd-BkNarrow.otf");
  font-display: swap;
}
:root {
  --paper: #f1eee5;
  --ink: #242d27;
  --muted: #66725e;
  --line: #d5d7ca;
  --panel: #e6e8dc;
  --dark: #171c1a;
  --serif: Garamond, Georgia, serif;
  --sans: Arial, Helvetica, sans-serif;
  --topbar: 64px;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar) + 24px);
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.75 var(--sans);
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
/* top bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--topbar);
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 28px;
  background: var(--dark);
  color: #f0eee4;
  border-bottom: 1px solid #ffffff15;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--serif);
  font-size: 24px;
  letter-spacing: -0.03em;
  text-decoration: none;
}
.brand-mark {
  width: 30px;
  height: 30px;
  fill: none;
  stroke: currentColor;
  stroke-width: 0.9;
}
.phi {
  font-family: Georgia, "Times New Roman", serif;
}
.topbar-hub {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: #b7bfae;
  padding-left: 28px;
  border-left: 1px solid #ffffff25;
}
.topbar-links {
  margin-left: auto;
  display: flex;
  gap: 24px;
  font-size: 13px;
}
.topbar-links a {
  text-decoration: none;
  color: #d7dccb;
}
.topbar-links a:hover {
  color: #fff;
}
/* layout */
.layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr) 210px;
  gap: 48px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 28px;
}
.sidebar {
  position: sticky;
  top: var(--topbar);
  align-self: start;
  max-height: calc(100vh - var(--topbar));
  overflow-y: auto;
  padding: 34px 0 40px;
  border-right: 1px solid var(--line);
}
.sidebar-mobile {
  display: none;
}
.sidebar-list {
  display: flex;
  flex-direction: column;
}
.nav-group {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 22px 0 6px;
}
.nav-group:first-child {
  margin-top: 0;
}
.sidebar-list a {
  font-size: 14px;
  line-height: 1.35;
  padding: 7px 12px 7px 0;
  text-decoration: none;
  color: #3f4a41;
  border-right: 2px solid transparent;
  margin-right: -1px;
}
.sidebar-list a:hover {
  color: var(--ink);
}
.sidebar-list a.active {
  color: var(--ink);
  font-weight: bold;
  border-right-color: var(--ink);
}
.content {
  padding: 40px 0 60px;
  min-width: 0;
}
.toc {
  position: sticky;
  top: var(--topbar);
  align-self: start;
  padding: 40px 0;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toc-title {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}
.toc a {
  text-decoration: none;
  color: #3f4a41;
  line-height: 1.4;
}
.toc a:hover {
  color: var(--ink);
  text-decoration: underline;
}
/* article */
.eyebrow {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
h1 {
  font-size: 50px;
  margin: 10px 0 18px;
}
h2 {
  font-size: 29px;
  margin: 44px 0 12px;
  padding-top: 4px;
}
h3 {
  font-size: 21px;
  margin: 28px 0 8px;
}
p,
ul,
ol {
  margin: 0 0 17px;
}
li {
  margin-bottom: 7px;
}
.lead {
  font-size: 18px;
  line-height: 1.6;
  color: #33403a;
}
.key {
  background: var(--panel);
  border-radius: 6px;
  padding: 20px 24px 6px;
  margin: 8px 0 30px;
}
.key h2 {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 10px;
  padding: 0;
}
.key ul {
  padding-left: 18px;
}
sup a {
  text-decoration: none;
  font-size: 11px;
  color: var(--muted);
}
.table-wrap {
  overflow-x: auto;
  margin: 0 0 22px;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 13px;
}
td,
th {
  text-align: left;
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th:first-child,
td:first-child {
  padding-left: 0;
}
.refs {
  font-size: 13px;
  color: #4b5747;
  padding-left: 22px;
}
.refs li {
  margin-bottom: 9px;
  word-break: break-word;
}
.refs li:target {
  background: var(--panel);
}
.note {
  color: var(--muted);
  font-size: 13px;
}
dl dt {
  font-weight: bold;
  margin-top: 16px;
}
dl dd {
  margin: 0;
}
/* landing cards */
.cards {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  margin: 0 0 24px;
}
.card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  background: #f7f5ee;
  transition: border-color 0.15s;
}
.card:hover {
  border-color: var(--ink);
}
.card b {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.15;
}
.card span {
  font-size: 13px;
  color: #4b5747;
}
/* pager and footer */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 52px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.pager a {
  display: flex;
  flex-direction: column;
  font-family: var(--serif);
  font-size: 20px;
  text-decoration: none;
  max-width: 48%;
}
.pager a.next {
  text-align: right;
  margin-left: auto;
}
.pager small {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.doc-footer {
  margin-top: 36px;
  font-size: 12px;
  color: var(--muted);
}
/* responsive */
@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 230px minmax(0, 1fr);
  }
  .toc {
    display: none;
  }
}
@media (max-width: 760px) {
  .topbar {
    gap: 16px;
    padding: 0 18px;
  }
  .topbar-hub {
    display: none;
  }
  .layout {
    display: block;
    padding: 0 18px;
  }
  .sidebar {
    position: static;
    max-height: none;
    border-right: 0;
    padding: 14px 0 0;
  }
  .sidebar-desktop {
    display: none;
  }
  .sidebar-mobile {
    display: block;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 8px 14px;
    background: #f7f5ee;
  }
  .sidebar-mobile summary {
    cursor: pointer;
    font-size: 13px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .sidebar-mobile .sidebar-list {
    padding: 8px 0 4px;
  }
  .sidebar-list a {
    border-right: 0;
    border-left: 2px solid transparent;
    padding-left: 10px;
  }
  .sidebar-list a.active {
    border-left-color: var(--ink);
  }
  .content {
    padding-top: 24px;
  }
  h1 {
    font-size: 38px;
  }
  h2 {
    font-size: 25px;
  }
  .pager a {
    font-size: 17px;
  }
}