:root {
  --paper: #ffffff;
  --ink: #191919;
  --text-soft: #4c4c4c;
  --text-secondary: #686868;
  --border: #dfdedd;
  --plum: #512358;
  --font: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 15px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: #e4e3e2;
  color: var(--ink);
}

:focus-visible {
  outline: 1px solid var(--plum);
  outline-offset: 3px;
}

.rule { display: none; }

header {
  position: sticky;
  top: 0;
  z-index: 2;
  padding: 0 1.75rem;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

header .wrap {
  max-width: 68rem;
  min-height: 4.25rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.lockup {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  text-decoration: none;
  color: inherit;
}

.wordmark {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}

.operator {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-secondary);
}

nav.docs {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1.25rem;
  font-size: 0.94rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}

nav.docs a {
  color: var(--text-secondary);
  text-decoration: none;
}

nav.docs a:hover,
nav.docs a.is-current {
  color: var(--ink);
}

main,
footer .wrap {
  max-width: 68rem;
  margin: 0 auto;
}

main {
  display: grid;
  grid-template-columns: 15rem minmax(0, 42.8rem);
  column-gap: 3.5rem;
  align-items: start;
  padding: 3.25rem 1.75rem 6rem;
}

.doc {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
}

main:not(:has(.toc)) {
  grid-template-columns: minmax(0, 42.8rem);
}

main:not(:has(.toc)) > * { grid-column: 1; }

.doc-kicker {
  margin: 0 0 0.7rem;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-secondary);
}

h1 {
  font-size: clamp(2.4rem, 5vw, 3.75rem);
  font-weight: 500;
  letter-spacing: -0.028em;
  line-height: 1.08;
  text-wrap: balance;
  text-transform: none;
  color: var(--ink);
  margin: 0 0 0.7rem;
}

h2,
h3 {
  scroll-margin-top: 5.5rem;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.meta {
  color: var(--text-secondary);
  font-size: 0.94rem;
  letter-spacing: 0;
  text-transform: none;
  margin: 0 0 2rem;
}

.lede {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-soft);
  margin: 0 0 2rem;
}

h2 {
  font-size: 1.3125rem;
  font-weight: 500;
  margin: 2.6rem 0 0.75rem;
  padding-top: 0;
  border-top: 0;
}

h3 {
  font-size: 1rem;
  font-weight: 500;
  margin: 1.6rem 0 0.4rem;
}

p { margin: 0 0 1rem; }

strong { color: var(--ink); font-weight: 600; }

ul,
ol {
  padding-left: 1.15rem;
  margin: 0 0 1rem;
}

li { margin: 0.4rem 0; }

a {
  color: var(--ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

a:hover { color: var(--plum); }

.toc {
  grid-column: 1;
  grid-row: 1;
  position: sticky;
  top: 5.5rem;
  align-self: start;
  max-height: calc(100vh - 7rem);
  margin: 0;
  padding: 0.35rem 0.75rem 0 0;
  overflow: auto;
  border: 0;
  background: transparent;
}

.toc > p {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-secondary);
}

.toc ol {
  margin: 0;
  padding-left: 1.15rem;
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--text-secondary);
}

.toc li { margin: 0.42rem 0; }

.toc a {
  color: var(--text-secondary);
  text-decoration: none;
}

.toc a:hover {
  color: var(--ink);
  text-decoration: none;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  margin: 0.5rem 0 1.5rem;
  background: transparent;
  border: 0;
  border-radius: 0;
}

th,
td {
  padding: 0.65rem 0.85rem 0.65rem 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  background: transparent;
}

th {
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-secondary);
}

tr:last-child td { border-bottom: 1px solid var(--border); }

footer {
  border-top: 1px solid var(--border);
  padding: 1.35rem 1.75rem 2.25rem;
  color: var(--text-secondary);
  font-size: 0.84rem;
  letter-spacing: 0;
  text-transform: none;
}

footer .regent {
  font-weight: 500;
  letter-spacing: 0;
  color: var(--ink);
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

footer a:hover { color: var(--ink); }

.doc-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  border-top: 1px solid var(--border);
}

.doc-list li {
  margin: 0;
  border-bottom: 1px solid var(--border);
}

.doc-list a {
  display: block;
  padding: 1.05rem 0;
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-transform: none;
  text-decoration: none;
}

.doc-list a:hover { color: var(--plum); }

.doc-list a span {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.9rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-secondary);
}

.doc-note {
  margin: 1.35rem 0 0;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

@media (max-width: 900px) {
  header { padding: 0.7rem 1.15rem; }

  header .wrap {
    min-height: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
    padding: 0.2rem 0;
  }

  nav.docs { justify-content: flex-start; }

  main,
  main:not(:has(.toc)) {
    grid-template-columns: minmax(0, 1fr);
    padding: 2rem 1.15rem 4rem;
  }

  .doc,
  .toc,
  main:not(:has(.toc)) > * {
    grid-column: 1;
    grid-row: auto;
  }

  .toc {
    position: static;
    max-height: none;
    margin: 0.5rem 0 1.5rem;
    padding: 0 0 1rem;
    border-bottom: 1px solid var(--border);
    overflow: visible;
  }

  footer { padding: 1.15rem 1.15rem 2rem; }
}