:root {
  --bg: #F4F7FB;
  --surface: #FFFFFF;
  --ink: #0B1B33;
  --muted: #5A6A84;
  --line: #D5DEEB;
  --accent: #1F7CF5;
  --accent-ink: #0B4FC2;
  --font-display: 'Unbounded', 'Arial Black', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Albert Sans', 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --pad: clamp(1.25rem, 4vw, 3rem);
  color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-ink); }
a:hover { color: var(--accent); }
:is(a, button):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: .75rem var(--pad);
  background: #081A34;
  color: #F2F6FC;
}
.logo { display: inline-flex; align-items: center; text-decoration: none; }
.logo img { display: block; height: 64px; width: auto; }
.top__back { font-family: var(--font-mono); font-size: .8125rem; letter-spacing: .02em; text-decoration: none; color: #A9BAD3; }
.top__back:hover { color: #F2F6FC; }
.top :is(a):focus-visible { outline-color: #5CC6F2; }

.doc {
  max-width: 44rem;
  margin: 0 auto;
  padding: calc(var(--pad) * 1.2) var(--pad) calc(var(--pad) * 2);
}
.doc__eyebrow {
  margin: 0 0 .75rem;
  font-family: var(--font-mono); font-size: .8125rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.doc h1 {
  margin: 0 0 .5rem;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.5rem); line-height: 1.1; letter-spacing: -.02em;
}
.doc__meta { margin: 0 0 2rem; color: var(--muted); font-size: .95rem; }
.doc h2 {
  margin: 2.25rem 0 .6rem;
  font-family: var(--font-display); font-weight: 500;
  font-size: 1.2rem; letter-spacing: -.01em;
}
.doc h3 { margin: 1.5rem 0 .4rem; font-size: 1.05rem; font-weight: 600; }
.doc p, .doc li { max-width: 40rem; }
.doc ul, .doc ol { padding-left: 1.3rem; }
.doc li + li { margin-top: .35rem; }
.doc table { border-collapse: collapse; width: 100%; max-width: 40rem; margin: .5rem 0 1rem; font-size: .95rem; }
.doc th, .doc td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { font-weight: 600; color: var(--muted); font-size: .85rem; letter-spacing: .04em; text-transform: uppercase; }
.doc .note {
  margin: 1rem 0; padding: .9rem 1.1rem; border-left: 3px solid var(--accent);
  background: var(--surface); border-radius: 0 8px 8px 0; font-size: .95rem;
}
.doc .tbc { font-family: var(--font-mono); font-size: .85em; background: #FFF3C4; color: #6B4E00; padding: .05em .35em; border-radius: 4px; }

.foot {
  border-top: 1px solid var(--line);
  padding: 1.25rem var(--pad) var(--pad);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .5rem 1.5rem;
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .03em; color: var(--muted);
}
.foot p { margin: 0; }
.foot a { color: inherit; text-decoration: none; }
.foot a:hover { color: var(--ink); }
.foot nav { display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; }

/* ---------- Small screens ---------- */
@media (max-width: 600px) {
  body { font-size: 1rem; }
  .top__back { font-size: .75rem; }
  .doc h1 { font-size: 1.6rem; }
  .doc table, .doc tbody, .doc tr, .doc td { display: block; width: 100%; }
  .doc thead { display: none; }
  .doc tr { padding: .6rem 0; border-bottom: 1px solid var(--line); }
  .doc td { padding: .15rem 0; border: 0; }
  .doc td::before {
    content: attr(data-label);
    display: block;
    font-size: .75rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
    margin-bottom: .1rem;
  }
  .foot { font-size: .85rem; }
  .foot nav { gap: .25rem 1.25rem; }
  .foot nav a { display: inline-block; padding: .45rem 0; }
}

/* ---------- Language selector ---------- */
.top__right { display: inline-flex; align-items: center; gap: 1.1rem; }
.lang {
  display: inline-flex; align-items: center; gap: .45rem;
  font-family: var(--font-mono); font-size: .8125rem; letter-spacing: .06em;
}
.lang a {
  color: #A9BAD3; text-decoration: none;
  padding: .5rem .25rem; border-bottom: 1px solid transparent;
}
.lang a:hover { color: #F2F6FC; border-color: rgba(255,255,255,.16); }
.lang a[aria-current="true"] { color: #F2F6FC; font-weight: 500; }
.lang__sep { color: rgba(255,255,255,.24); }
@media (max-width: 600px) {
  .top__back { display: none; }
}