/* ulang.dev — one stylesheet, no external fonts, no JS required. */
:root {
  --bg: #0c0e13;
  --bg-2: #12151c;
  --bg-3: #181c25;
  --line: #262b37;
  --text: #e6e8ee;
  --muted: #9097a8;
  --accent: #9aa5ff;
  --accent-2: #c3c9ff;
  --ok: #5fd39a;
  --ok-bg: rgba(95, 211, 154, 0.12);
  --err: #ff8a7a;
  --err-bg: rgba(255, 138, 122, 0.12);
  --kw: #c792ea;
  --str: #e3c47b;
  --num: #f2a272;
  --com: #6b7489;
  --path: #82c8ff;
  --src: #7fd4c1;
  --type: #ffcb6b;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 8px;
  --measure: 46rem;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbfbfd;
    --bg-2: #f2f3f7;
    --bg-3: #e9ebf2;
    --line: #d9dce5;
    --text: #1b1e27;
    --muted: #5b6273;
    --accent: #3b47c4;
    --accent-2: #2a3499;
    --ok: #13804f;
    --ok-bg: rgba(19, 128, 79, 0.1);
    --err: #b3362a;
    --err-bg: rgba(179, 54, 42, 0.09);
    --kw: #7a3eb1;
    --str: #8a6100;
    --num: #b4520f;
    --com: #7a8194;
    --path: #0b62a8;
    --src: #0b7a68;
    --type: #8a5a00;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--sans);
}
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-2); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }
code, pre, kbd, samp, textarea { font-family: var(--mono); }
code { font-size: 0.88em; background: var(--bg-2); border: 1px solid var(--line); border-radius: 4px; padding: 0.05em 0.35em; overflow-wrap: anywhere; }
pre code, a code { border: 0; background: none; padding: 0; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; top: 0; background: var(--bg-3); padding: 0.5rem 1rem; z-index: 10; }
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* header and footer */
.site-header {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  position: sticky; top: 0; z-index: 5;
  backdrop-filter: blur(6px);
}
.wordmark { font-weight: 650; font-size: 1.15rem; color: var(--text); text-decoration: none; letter-spacing: -0.01em; }
.wordmark .mu { color: var(--accent); font-family: var(--mono); }
.badge { font: 600 0.7rem/1 var(--mono); color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 0.2em 0.5em; vertical-align: 0.2em; margin-left: 0.25rem; }
.site-header ul { list-style: none; display: flex; gap: 1.25rem; margin: 0; padding: 0; }
.site-header nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--text); }
.site-header nav a[aria-current="page"] { box-shadow: 0 2px 0 var(--accent); }
.site-footer { border-top: 1px solid var(--line); margin-top: 4rem; padding: 1.5rem clamp(1rem, 4vw, 2.5rem); font-size: 0.875rem; color: var(--muted); }
.site-footer p { margin: 0.25rem 0; }

/* layout */
.shell { max-width: calc(var(--measure) + 4rem); margin: 0 auto; padding: 2rem clamp(1rem, 4vw, 2rem); }
.shell.wide { max-width: 82rem; }
.shell.has-sidebar { max-width: 76rem; display: grid; grid-template-columns: 15rem minmax(0, 1fr); gap: 3rem; align-items: start; }
main { min-width: 0; max-width: var(--measure); }
.wide main { max-width: none; }
.sidebar { position: sticky; top: 4.75rem; max-height: calc(100vh - 6rem); overflow: auto; font-size: 0.9rem; }
.sidebar summary { font-weight: 600; color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; cursor: pointer; margin-bottom: 0.5rem; }
.sidebar ol { list-style: none; margin: 0; padding: 0; }
.sidebar li { margin: 0.1rem 0; }
.sidebar a { display: block; color: var(--muted); text-decoration: none; padding: 0.2rem 0.6rem; border-left: 2px solid transparent; }
.sidebar a:hover { color: var(--text); }
.sidebar a[aria-current="page"] { color: var(--text); border-left-color: var(--accent); font-weight: 600; }
.sidebar .toc { margin: 0.15rem 0 0.5rem 0.75rem; }
.sidebar .toc a { font-size: 0.82rem; padding: 0.1rem 0.6rem; }
@media (max-width: 900px) {
  .shell.has-sidebar { display: block; }
  .sidebar { position: static; max-height: none; margin-bottom: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); padding: 0.75rem; }
  .sidebar details:not([open]) summary { margin: 0; }
}

/* type */
h1, h2, h3, h4 { line-height: 1.25; letter-spacing: -0.015em; }
h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); margin: 0.25rem 0 1rem; }
h2 { font-size: 1.45rem; margin: 2.75rem 0 0.75rem; padding-top: 0.5rem; }
h3 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
h2 .anchor, h3 .anchor { color: inherit; text-decoration: none; }
h2 .anchor:hover::after, h3 .anchor:hover::after { content: " #"; color: var(--muted); }
[id] { scroll-margin-top: 5rem; }
.eyebrow { font: 600 0.78rem/1.4 var(--mono); letter-spacing: 0.04em; color: var(--accent); margin: 0; }
.eyebrow a { color: inherit; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 40rem; }
blockquote { margin: 1rem 0; padding: 0.25rem 1rem; border-left: 3px solid var(--accent); background: var(--bg-2); border-radius: 0 var(--radius) var(--radius) 0; }
li { margin: 0.25rem 0; }
.notice { border: 1px solid var(--line); background: var(--bg-2); padding: 0.75rem 1rem; border-radius: var(--radius); }

/* tables */
.table { overflow-x: auto; margin: 1rem 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
th, td { text-align: left; vertical-align: top; padding: 0.45rem 0.7rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 0.82rem; }
td code { white-space: normal; }

/* code */
pre.code { background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.9rem 1rem; overflow-x: auto; font-size: 0.85rem; line-height: 1.55; margin: 1rem 0; tab-size: 2; }
.t-kw { color: var(--kw); font-weight: 600; }
.t-mode, .t-bool { color: var(--num); }
.t-type { color: var(--type); }
.t-str { color: var(--str); }
.t-num { color: var(--num); }
.t-com { color: var(--com); font-style: italic; }
.t-path { color: var(--path); }
.t-src { color: var(--src); }
.t-op { color: var(--muted); }

/* cases and results */
.case { margin: 1.5rem 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); overflow: hidden; }
.case figcaption { display: flex; justify-content: space-between; gap: 1rem; padding: 0.55rem 0.9rem; font-size: 0.88rem; color: var(--muted); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.case-id { font: 0.75rem var(--mono); color: var(--muted); white-space: nowrap; text-decoration: none; }
.case-id:hover { color: var(--accent); }
.case pre.code { margin: 0; border: 0; border-radius: 0; }
.result { margin: 0; padding: 0.55rem 0.9rem; font-size: 0.85rem; border-top: 1px solid var(--line); overflow-wrap: anywhere; }
.result-ok { background: var(--ok-bg); }
.result-err { background: var(--err-bg); }
.chip { display: inline-block; font: 600 0.72rem/1.5 var(--mono); padding: 0 0.5em; border-radius: 999px; letter-spacing: 0.03em; white-space: nowrap; }
.chip-ok { color: var(--ok); border: 1px solid var(--ok); }
.chip-err { color: var(--err); border: 1px solid var(--err); }
.digest { font-size: 0.78rem; word-break: break-all; }
.vector { border: 1px solid var(--line); border-radius: var(--radius); margin: 0.5rem 0; background: var(--bg); }
.vector summary { cursor: pointer; padding: 0.55rem 0.9rem; display: flex; gap: 0.6rem; align-items: baseline; flex-wrap: wrap; }
.vector summary span:not(.chip) { flex: 1; min-width: 12rem; }
.vector[open] summary { border-bottom: 1px solid var(--line); background: var(--bg-2); }
.vector pre.code { margin: 0; border: 0; border-radius: 0; }
.vector table, .vector > p.muted { margin: 0; padding: 0.5rem 0.9rem; }
.decisions td:first-child { color: var(--muted); }

/* pager, cards, home */
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.pager a { text-decoration: none; font-weight: 500; }
.hero { padding: 2rem 0 0.5rem; }
.hero h1 { font-size: clamp(2.1rem, 5.5vw, 3.2rem); max-width: 38rem; }
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin: 1.5rem 0; }
.button { display: inline-block; font: inherit; font-weight: 600; background: var(--accent); color: var(--bg); border: 1px solid var(--accent); padding: 0.55rem 1.1rem; border-radius: var(--radius); text-decoration: none; cursor: pointer; }
.button:hover { background: var(--accent-2); color: var(--bg); }
.button-quiet { background: transparent; color: var(--accent); }
.button-quiet:hover { background: var(--bg-2); color: var(--accent-2); }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1.5rem; margin: 2.5rem 0; }
.grid3 h2 { font-size: 1.05rem; margin: 0 0 0.35rem; padding: 0; }
.grid3 p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 0.75rem; }
.cards li { border: 1px solid var(--line); border-radius: var(--radius); padding: 0.8rem 1rem; display: flex; flex-direction: column; gap: 0.3rem; margin: 0; background: var(--bg-2); }
.cards li span { font-size: 0.88rem; }
.cards li span.muted { font-size: 0.78rem; font-family: var(--mono); overflow-wrap: anywhere; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0.35rem 1.25rem; margin: 1.5rem 0; font-size: 0.92rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }

/* playground */
.playground { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 1.25rem; margin-top: 1.5rem; }
@media (max-width: 960px) { .playground { grid-template-columns: 1fr; } }
.playground section { min-width: 0; }
.pg-bar { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.6rem; }
.pg-bar label, .pg-label { font-size: 0.82rem; color: var(--muted); font-weight: 600; }
.pg-label { display: block; margin: 0.6rem 0 0.3rem; }
select, textarea { font: inherit; color: var(--text); background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); }
select { padding: 0.35rem 0.5rem; max-width: 100%; }
textarea { width: 100%; padding: 0.8rem 0.9rem; font: 0.85rem/1.55 var(--mono); resize: vertical; tab-size: 2; }
#pg-input { min-height: 34rem; }
.pg-facts { min-height: 12rem; }
#pg-status { border: 1px solid var(--line); border-radius: var(--radius); margin-top: 0.6rem; min-height: 2.6rem; }
.pg-tabs { display: flex; gap: 0.25rem; border-bottom: 1px solid var(--line); margin-bottom: 0.9rem; }
.pg-tabs button { font: inherit; font-size: 0.9rem; font-weight: 600; background: none; border: 0; color: var(--muted); padding: 0.45rem 0.8rem; cursor: pointer; border-bottom: 2px solid transparent; }
.pg-tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); }
#pg-decide { margin-top: 0.75rem; }
#pg-decision { margin-top: 0.9rem; }
#pg-decision .result { border: 1px solid var(--line); border-radius: var(--radius); }
#panel-canonical pre.code, #panel-schema pre.code { margin-top: 0; max-height: 40rem; }

/* header search */
.site-header { gap: 1.25rem; }
.site-header nav { margin-left: auto; }
.search input { font: inherit; font-size: 0.88rem; color: var(--text); background: var(--bg-2); border: 1px solid var(--line); border-radius: 999px; padding: 0.35rem 0.9rem; width: 11rem; }
.search input:focus { border-color: var(--accent); outline: none; width: 14rem; }
@media (max-width: 720px) { .search { width: 100%; } .search input, .search input:focus { width: 100%; } .site-header nav { margin-left: 0; } }
.search-page input { font: inherit; font-size: 1.05rem; width: 100%; max-width: 36rem; padding: 0.6rem 0.9rem; color: var(--text); background: var(--bg-2); border: 1px solid var(--line); border-radius: var(--radius); }
.search-results { list-style: none; padding: 0; margin: 1rem 0; }
.search-results li { padding: 0.75rem 0; border-bottom: 1px solid var(--line); }
.search-results a { font-weight: 600; text-decoration: none; }
.search-results p { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.9rem; }
mark { background: color-mix(in srgb, var(--accent) 30%, transparent); color: var(--text); border-radius: 2px; padding: 0 1px; }

/* sidebar sections */
.side-head { font: 600 0.72rem/1.4 var(--sans); text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin: 1.1rem 0 0.35rem 0.6rem; }
.sidebar nav > .side-head:first-child { margin-top: 0.25rem; }

/* figures: files, command runs, captions */
.file, .run { margin: 1.25rem 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.file figcaption, .run figcaption { display: flex; justify-content: space-between; gap: 1rem; padding: 0.45rem 0.9rem; font-size: 0.8rem; color: var(--muted); border-bottom: 1px solid var(--line); background: var(--bg-2); }
.file figcaption code { color: var(--text); background: none; border: 0; padding: 0; }
.file pre.code, .run pre.code { margin: 0; border: 0; border-radius: 0; }
.run pre.code { background: var(--bg); }
.t-prompt { color: var(--muted); user-select: none; }
.t-cmd { color: var(--text); font-weight: 600; }
.caption { font-size: 0.85rem; color: var(--muted); margin: 0.75rem 0 0.35rem; }
.decide-block { margin: 1rem 0 1.75rem; }
.decide-block pre.code { margin-top: 0.35rem; }
.excerpt figcaption span { font-style: italic; }

/* HTTP exchanges */
.exchanges { display: grid; gap: 0.9rem; margin: 1rem 0; }
.exchange { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.75rem; border: 1px solid var(--line); border-radius: var(--radius); padding: 0.4rem 0.8rem 0.6rem; }
.exchange pre.code { margin: 0.25rem 0 0; font-size: 0.78rem; max-height: 16rem; }
.exchange .caption { margin: 0.35rem 0 0; }
@media (max-width: 760px) { .exchange { grid-template-columns: 1fr; } }

/* home */
.hero-code { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 1rem; align-items: start; margin: 1.5rem 0; }
.hero-code .file, .hero-code .run { margin: 0 0 0.75rem; }
.hero-code pre.code { font-size: 0.76rem; }
@media (max-width: 1000px) { .hero-code { grid-template-columns: 1fr; } }
.shell:not(.has-sidebar):not(.wide) main:has(.hero) { max-width: 72rem; }
.shell:has(.hero) { max-width: 76rem; }
.grid3 h3 { font-size: 1.02rem; margin: 0 0 0.35rem; }

/* API reference */
.api-item { border-top: 1px solid var(--line); padding-top: 0.25rem; margin-top: 1.25rem; }
.api-item h3 { margin: 0.75rem 0 0.4rem; font-size: 1.05rem; }
.api-item h3 code { font-size: 1rem; background: none; border: 0; padding: 0; color: var(--text); }
.kind { font: 600 0.7rem var(--mono); color: var(--accent); border: 1px solid var(--line); border-radius: 999px; padding: 0.05em 0.5em; vertical-align: 0.15em; }
.source-link { font-size: 0.8rem; margin: -0.5rem 0 0; }
.source-link a { color: var(--muted); }
.mod-file { font-size: 0.8rem; font-weight: 400; }
.api-ast summary { cursor: pointer; color: var(--accent); margin: 0.5rem 0; }

/* browser demo */
.demo { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 0.75rem 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; background: var(--bg-2); }
.demo label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.85rem; color: var(--muted); }
.demo label.check { flex-direction: row; align-items: center; gap: 0.5rem; color: var(--text); }
.demo input[type="number"], .demo select { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 0.35rem 0.5rem; }
.demo output { grid-column: 1 / -1; border: 1px solid var(--line); border-radius: var(--radius); font-family: var(--mono); }

/* footer */
.footer-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.footer-cols ul { list-style: none; padding: 0; margin: 0; }
.footer-cols li { margin: 0.2rem 0; }
.footer-cols a { color: var(--muted); text-decoration: none; }
.footer-cols a:hover { color: var(--text); }
.footer-head { font-weight: 600; color: var(--text); margin: 0 0 0.35rem; }
.button-small { padding: 0.3rem 0.7rem; font-size: 0.82rem; margin-left: auto; }