/* Verso — documentation and project site.
   Single stylesheet, no external fonts, no third-party CSS. */

:root {
  --bg: #fbfbfd;
  --bg-alt: #f3f4f8;
  --surface: #ffffff;
  --ink: #15161a;
  --ink-2: #41454f;
  --ink-3: #6b7080;
  --line: #e2e4ec;
  --line-2: #cdd1de;
  --brand: #4f46e5;
  --brand-dark: #3b32c9;
  --brand-wash: #eeedfd;
  --teal: #0d9488;
  --amber: #b45309;
  --rose: #be123c;
  --code-bg: #15171f;
  --code-ink: #dfe3ee;
  --code-dim: #8b93aa;
  --code-key: #c4b5fd;
  --code-str: #86efac;
  --code-num: #fcd34d;
  --code-tag: #7dd3fc;
  --radius: 8px;
  --radius-sm: 5px;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --shadow: 0 1px 2px rgba(21,22,26,.05), 0 8px 24px -12px rgba(21,22,26,.18);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.68 var(--sans);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 2px; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 3px; }

h1, h2, h3, h4 { margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; color: var(--ink); }
h1 { font-size: clamp(2rem, 4.2vw, 3rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.4rem, 2.4vw, 1.85rem); }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; }
p { margin: 0 0 1.1em; max-width: 74ch; }
ul, ol { margin: 0 0 1.15em; padding-left: 1.3em; }
li { margin-bottom: .4em; }
li::marker { color: var(--ink-3); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.6rem 0; }

code {
  font-family: var(--mono); font-size: .88em;
  background: var(--bg-alt); border: 1px solid var(--line);
  padding: .12em .38em; border-radius: 4px; color: var(--ink);
  word-break: break-word;
}
a code { color: var(--brand); }
pre {
  margin: 0 0 1.4em; padding: 18px 20px; overflow-x: auto;
  background: var(--code-bg); color: var(--code-ink);
  border-radius: var(--radius); font-family: var(--mono);
  font-size: .855rem; line-height: 1.62; tab-size: 2;
}
pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.c-k { color: var(--code-key); }
.c-s { color: var(--code-str); }
.c-n { color: var(--code-num); }
.c-t { color: var(--code-tag); }
.c-c { color: var(--code-dim); font-style: italic; }
.c-f { color: #f9a8d4; }

.wrap { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; }
.skip { position: absolute; left: -9999px; background: var(--brand); color: #fff; padding: 11px 16px; border-radius: 0 0 6px 0; z-index: 99; }
.skip:focus { left: 0; top: 0; }

/* ---------- Header ---------- */
.hdr {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251,251,253,.88); backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.hdr__in { display: flex; align-items: center; gap: 26px; min-height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 1.1rem; letter-spacing: -0.03em; flex: none; }
.logo:hover { text-decoration: none; }
.logo .ver { font-family: var(--mono); font-size: .68rem; font-weight: 600; color: var(--ink-3); background: var(--bg-alt); border: 1px solid var(--line); padding: 2px 6px; border-radius: 100px; letter-spacing: 0; }
.hnav { margin-left: auto; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.hnav a { color: var(--ink-2); font-size: .92rem; font-weight: 500; }
.hnav a:hover { color: var(--ink); text-decoration: none; }
.hnav a[aria-current="page"], .hnav a.on { color: var(--brand); font-weight: 600; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-sm); font-size: .92rem; font-weight: 600;
  background: var(--brand); color: #fff; border: 1px solid var(--brand); cursor: pointer;
}
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; text-decoration: none; }
.btn--sec { background: var(--surface); color: var(--ink); border-color: var(--line-2); }
.btn--sec:hover { background: var(--bg-alt); color: var(--ink); border-color: var(--ink-3); }
.btn--lg { padding: 13px 24px; font-size: 1rem; }

/* ---------- Hero ---------- */
.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(40px, 5vw, 72px); }
.hero__grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 20px;
  padding: 5px 12px 5px 6px; border-radius: 100px; background: var(--brand-wash);
  border: 1px solid #ddd9fb; font-size: .8rem; color: #4338ca; font-weight: 500;
}
.badge b { background: var(--brand); color: #fff; padding: 2px 8px; border-radius: 100px; font-size: .72rem; font-weight: 700; letter-spacing: .02em; }
.hero h1 { max-width: 14ch; margin-bottom: 20px; }
.hero .sub { font-size: 1.14rem; color: var(--ink-2); max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero__meta { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 22px; font-size: .86rem; color: var(--ink-3); }
.hero__meta b { color: var(--ink); font-weight: 600; }

.termbar {
  display: flex; align-items: center; gap: 7px; padding: 10px 14px;
  background: #0f1117; border-radius: var(--radius) var(--radius) 0 0;
  border-bottom: 1px solid #262a36;
}
.termbar i { width: 11px; height: 11px; border-radius: 50%; background: #343a4a; display: block; }
.termbar span { margin-left: 8px; font-family: var(--mono); font-size: .74rem; color: var(--code-dim); }
.termbar + pre { margin: 0; border-radius: 0 0 var(--radius) var(--radius); }
.frame { box-shadow: var(--shadow); border-radius: var(--radius); overflow: hidden; }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.dark { background: #12141b; color: #b9bfd0; border: 0; }
.dark h2, .dark h3 { color: #fff; }
.dark p { color: #9aa1b4; }

.eyebrow { display: block; font-size: .74rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--brand); margin-bottom: 12px; }
.dark .eyebrow { color: #a5b4fc; }
.lead { font-size: 1.08rem; color: var(--ink-2); max-width: 64ch; }

.grid { display: grid; gap: 24px; }
.g2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0,1fr)); }

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
}
.card h3 { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; font-size: 1.05rem; }
.card p { font-size: .94rem; color: var(--ink-2); margin: 0; }
.dark .card { background: #181b24; border-color: #262a36; }
.ico { width: 34px; height: 34px; border-radius: 8px; background: var(--brand-wash); color: var(--brand); display: grid; place-items: center; flex: none; }
.ico svg { width: 18px; height: 18px; }

.metric { text-align: left; }
.metric b { display: block; font-size: clamp(1.9rem,3.4vw,2.5rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1.05; color: var(--ink); }
.dark .metric b { color: #fff; }
.metric span { display: block; margin-top: 6px; font-size: .88rem; color: var(--ink-3); }

/* ---------- Docs layout ---------- */
.doc { display: grid; grid-template-columns: 248px minmax(0,1fr) 196px; gap: 48px; padding: 44px 0 88px; align-items: start; }
.side { position: sticky; top: 88px; font-size: .9rem; }
.side nav { border-left: 1px solid var(--line); }
.side h4 { font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin: 22px 0 8px; padding-left: 16px; }
.side h4:first-child { margin-top: 0; }
.side ul { list-style: none; margin: 0 0 4px; padding: 0; }
.side li { margin: 0; }
.side a { display: block; padding: 6px 16px; color: var(--ink-2); margin-left: -1px; border-left: 2px solid transparent; }
.side a:hover { color: var(--ink); background: var(--bg-alt); text-decoration: none; }
.side a[aria-current="page"] { color: var(--brand); font-weight: 600; border-left-color: var(--brand); background: var(--brand-wash); }

.toc { position: sticky; top: 88px; font-size: .84rem; }
.toc h4 { font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 10px; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); }
.toc a { display: block; padding: 5px 0 5px 14px; color: var(--ink-3); margin-left: -1px; border-left: 2px solid transparent; }
.toc a:hover { color: var(--brand); border-left-color: var(--line-2); text-decoration: none; }

.docbody { min-width: 0; }
.docbody > h1 { margin-bottom: 14px; }
.docbody h2 { margin-top: 2.4em; padding-top: .3em; scroll-margin-top: 88px; }
.docbody h3 { margin-top: 1.9em; scroll-margin-top: 88px; }
.docbody h2:first-of-type { margin-top: 1.6em; }
.doc-kicker { font-size: .76rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--brand); margin-bottom: 10px; display: block; }
.doc-lead { font-size: 1.1rem; color: var(--ink-2); margin-bottom: 2em; }

.note {
  border: 1px solid var(--line); border-left: 3px solid var(--brand);
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 20px; margin: 0 0 1.4em;
}
.note p:last-child { margin-bottom: 0; }
.note b { display: block; font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--brand); margin-bottom: 6px; }
.note--warn { border-left-color: var(--amber); }
.note--warn b { color: var(--amber); }
.note--danger { border-left-color: var(--rose); }
.note--danger b { color: var(--rose); }

table { width: 100%; border-collapse: collapse; font-size: .92rem; margin: 0 0 1.5em; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); background: var(--bg-alt); white-space: nowrap; }
td code { white-space: nowrap; }

.sig {
  font-family: var(--mono); font-size: .92rem; background: var(--bg-alt);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 16px; margin: 0 0 1.2em; overflow-x: auto; color: var(--ink);
}
.sig .c-f { color: var(--brand); font-weight: 600; }
.sig .c-k { color: var(--teal); }

.pager { display: flex; gap: 16px; justify-content: space-between; margin-top: 64px; padding-top: 28px; border-top: 1px solid var(--line); }
.pager a { display: block; padding: 14px 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); max-width: 48%; }
.pager a:hover { border-color: var(--brand); text-decoration: none; }
.pager span { display: block; font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; }
.pager b { color: var(--ink); font-weight: 600; }
.pager .next { margin-left: auto; text-align: right; }

/* ---------- Changelog ---------- */
.rel { display: grid; grid-template-columns: 180px minmax(0,1fr); gap: 40px; padding: 36px 0; border-top: 1px solid var(--line); }
.rel__v { font-family: var(--mono); font-weight: 700; font-size: 1.1rem; color: var(--ink); }
.rel__d { font-size: .85rem; color: var(--ink-3); margin-top: 4px; }
.rel h3 { font-size: 1rem; margin: 1.5em 0 .5em; }
.rel h3:first-child { margin-top: 0; }
.chip {
  display: inline-block; font-size: .7rem; font-weight: 700; letter-spacing: .06em;
  text-transform: uppercase; padding: 3px 9px; border-radius: 100px; margin-top: 10px;
}
.chip--latest { background: #dcfce7; color: #166534; }
.chip--lts { background: var(--brand-wash); color: #4338ca; }
.chip--old { background: var(--bg-alt); color: var(--ink-3); }

/* ---------- Community ---------- */
.person { display: flex; gap: 14px; align-items: flex-start; }
.av { width: 42px; height: 42px; border-radius: 50%; flex: none; display: grid; place-items: center; font-weight: 700; font-size: .95rem; color: #fff; letter-spacing: -0.02em; }
.person h4 { margin: 0 0 2px; font-size: .97rem; }
.person p { margin: 0; font-size: .85rem; color: var(--ink-3); }

/* ---------- Footer ---------- */
.ftr { background: #12141b; color: #8b93aa; padding: 64px 0 32px; font-size: .9rem; border-top: 1px solid var(--line); }
.ftr a { color: #c3c9d9; }
.ftr a:hover { color: #fff; }
.ftr__grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 36px; }
.ftr h4 { color: #fff; font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 14px; }
.ftr ul { list-style: none; margin: 0; padding: 0; }
.ftr li { margin-bottom: 9px; }
.ftr__logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 1.05rem; margin-bottom: 12px; }
.ftr__bottom { margin-top: 48px; padding-top: 22px; border-top: 1px solid #262a36; display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; font-size: .82rem; }

/* ---------- 404 ---------- */
.nf { min-height: 78vh; display: grid; place-items: center; text-align: center; padding: 60px 0; }
.nf__code { font-family: var(--mono); font-size: clamp(3.4rem, 11vw, 6.5rem); font-weight: 700; letter-spacing: -0.05em; color: var(--brand); line-height: 1; }
.nf p { margin-left: auto; margin-right: auto; }
.nf .links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 26px; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .doc { grid-template-columns: 220px minmax(0,1fr); gap: 36px; }
  .toc { display: none; }
  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
  .g4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .ftr__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  section { padding: 56px 0; }
  .doc { grid-template-columns: 1fr; gap: 28px; padding-top: 28px; }
  .side { position: static; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); padding: 16px 8px; }
  .side nav { border-left: 0; }
  .side h4 { padding-left: 10px; }
  .side a { border-left: 0; border-radius: var(--radius-sm); padding: 7px 10px; margin-left: 0; }
  .side a[aria-current="page"] { border-left: 0; }
  .hdr { position: static; }
  .hdr__in { flex-wrap: wrap; padding: 12px 0; gap: 12px 18px; min-height: 0; }
  .hnav { margin-left: 0; width: 100%; gap: 16px; font-size: .88rem; }
  .g2, .g3 { grid-template-columns: 1fr; }
  .rel { grid-template-columns: 1fr; gap: 10px; }
  .pager { flex-direction: column; }
  .pager a { max-width: none; }
  .pager .next { margin-left: 0; text-align: left; }
}
@media (max-width: 440px) {
  .g4 { grid-template-columns: 1fr; }
  .ftr__grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}