.skip-link {
  position: absolute; left: 16px; top: 12px; z-index: 40;
  padding: 8px 14px; border-radius: 8px; background: var(--inv-bg); color: var(--inv-fg);
  font-size: 13px; font-weight: 600; transform: translateY(-140%);
}
.skip-link:focus { transform: none; }

.header-brand { display: flex; align-items: baseline; gap: 10px; min-width: 0; }
.header-docs {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--mute);
}
.header-docs:hover { color: var(--text); }

.header-actions .btn:not(.theme-toggle) { white-space: nowrap; }

.site-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  flex-shrink: 0;
  border-radius: 8px;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
}
.site-menu-toggle:hover { background: var(--btn-bg-hi); border-color: var(--btn-border-hi); }
.site-menu-toggle:focus-visible {
  outline: 2px solid var(--mgr);
  outline-offset: 2px;
}
.site-menu-icon { width: 18px; height: 18px; display: block; }

.docs-nav-backdrop { display: none; }
.drawer-brand { display: none; }
.rail-tools { display: none; }

body.docs-nav-open { overflow: hidden; }

.wrap.docs-shell {
  --docs-sticky-gap: 32px;
  max-width: 1180px;
  display: grid;
  grid-template-columns: 14.5rem minmax(0, 1fr);
  grid-template-areas: "nav article";
  column-gap: 3rem;
  padding: var(--docs-sticky-gap) 28px 96px;
  align-items: start;
}

.docs-nav {
  grid-area: nav;
  position: sticky; top: calc(var(--header-height) + var(--docs-sticky-gap));
  padding: 4px 0 8px;
  min-width: 0;
}

.docs-nav nav {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 4px;
}

.docs-article { grid-area: article; }

.rail-identity { padding: 0 10px 18px; }
.rail-product {
  font-family: 'Space Grotesk', sans-serif; font-size: 18px; font-weight: 600;
  letter-spacing: -0.02em; line-height: 1.25; margin: 0; color: var(--text);
}
.rail-sub {
  margin: 6px 0 0; font-size: 13.5px; line-height: 1.4; color: var(--dim);
}

.rail-home {
  display: inline-flex; align-self: start; align-items: center; min-height: 36px; margin: 0;
  padding-right: 16px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--panel); color: var(--dim); font-size: 14px; font-weight: 500;
}
.rail-home:hover { color: var(--text); border-color: var(--btn-border-hi); }
.rail-home[aria-current="page"] {
  color: var(--text); border-color: var(--mgr-line); background: var(--mgr-wash);
}
.rail-home .rail-icon-wrap {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; flex-shrink: 0;
}

.rail-eyebrow {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--mute); line-height: 1.2;
  margin: 16px 0 8px; padding: 0 12px;
}

.rail-item {
  display: flex; align-items: center; gap: 12px; width: 100%;
  min-height: 44px; padding: 0 12px; border: 0; border-radius: 8px;
  background: transparent; color: var(--dim); font: inherit; font-size: 14px; font-weight: 500;
  text-align: left; cursor: pointer;
}
.rail-item:hover { color: var(--text); background: var(--btn-bg); }
.rail-item[aria-current="page"] { color: var(--text); background: var(--btn-bg); }

.rail-icon, .rail-chevron {
  width: 16px; height: 16px; flex-shrink: 0;
}
.rail-item span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rail-chevron { margin-left: auto; transition: transform 180ms ease; }

.rail-group { margin: 0; }
.rail-group summary { list-style: none; }
.rail-group summary::-webkit-details-marker { display: none; }
.rail-group[open] .rail-chevron { transform: rotate(90deg); }

.rail-home:focus-visible,
.rail-item:focus-visible,
.rail-children a:focus-visible {
  outline: 2px solid var(--mgr);
  outline-offset: 2px;
}


.rail-children {
  position: relative; display: flex; flex-direction: column; gap: 2px;
  margin-top: 2px; padding-left: 28px;
}
.rail-children::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 20px; width: 1px;
  background: var(--border);
}
.rail-children a {
  display: flex; align-items: center; min-height: 36px; padding: 0 12px;
  border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--dim);
}
.rail-children a:hover { color: var(--text); background: var(--btn-bg); }
.rail-children a[aria-current="page"] { color: var(--text); background: var(--btn-bg); }

.docs-article { min-width: 0; max-width: 760px; padding-top: 8px; }

.docs-crumb {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--mute);
  margin: 0 0 22px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
}
.docs-crumb a { color: var(--dim); }
.docs-crumb a:hover { color: var(--text); }
.docs-crumb .sep { color: var(--border); }

.docs-article h1 {
  font-family: 'Space Grotesk', sans-serif; font-weight: 600;
  font-size: clamp(32px, 5vw, 44px); line-height: 1.1; letter-spacing: -0.03em;
  margin: 0 0 16px; color: var(--text); text-wrap: pretty;
}

.docs-lead {
  font-size: 18px; line-height: 1.65; color: var(--dim);
  margin: 0 0 36px; text-wrap: pretty;
}

.docs-prose { display: grid; gap: 16px; }
.docs-prose > * { min-width: 0; }

.docs-prose h2 {
  font-family: 'Space Grotesk', sans-serif; font-size: 22px; font-weight: 600;
  letter-spacing: -0.02em; color: var(--text); margin: 28px 0 0;
  scroll-margin-top: calc(var(--header-height) + var(--docs-sticky-gap));
}

.docs-prose h3 {
  font-family: 'Space Grotesk', sans-serif; font-size: 16px; font-weight: 600;
  color: var(--text); margin: 10px 0 0;
}

.docs-prose p {
  font-size: 15.5px; line-height: 1.72; color: var(--dim); margin: 0; text-wrap: pretty;
}

.docs-prose strong { color: var(--text); font-weight: 600; }

.docs-prose code, .token {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.88em;
  color: var(--text); background: var(--bg); padding: 0.12em 0.4em; border-radius: 4px;
  border: 1px solid var(--border-soft);
}

.docs-prose a { border-bottom: 1px solid var(--btn-border-hi); }
.docs-prose a:hover { color: var(--text); }

.docs-prose ul, .docs-prose ol {
  margin: 0; padding-left: 1.2em; display: grid; gap: 8px;
  font-size: 15.5px; line-height: 1.65; color: var(--dim);
}
.docs-prose li::marker { color: var(--mute); }

.docs-prose hr {
  border: 0; border-top: 1px solid var(--border); margin: 12px 0;
}

.table-wrap {
  overflow-x: auto; border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel);
}

.docs-prose table {
  width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.5;
}

.docs-prose th, .docs-prose td {
  text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--border);
  vertical-align: top; color: var(--dim);
}

.docs-prose th {
  font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--mute); background: var(--bg);
}

.docs-prose tr:last-child td { border-bottom: 0; }
.docs-prose td code { white-space: nowrap; }

.callout {
  border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px;
  background: var(--bg); display: grid; gap: 6px;
}
.callout.warn {
  border-color: color-mix(in srgb, #d4a017 40%, var(--border));
  background: color-mix(in srgb, #d4a017 7%, var(--panel));
}
.callout .callout-label {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--mute);
}
.callout p { font-size: 14.5px; }

.term-grid {
  display: grid; gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
}
.term-grid div {
  background: var(--panel); padding: 16px 18px;
  display: grid; grid-template-columns: 118px 1fr; gap: 14px; align-items: start;
}
.term-grid dt {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--mgr);
  margin: 0;
}
.term-grid dd {
  font-size: 14.5px; line-height: 1.55; color: var(--dim); margin: 0;
}

.guide-list {
  list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: 14px; overflow: hidden;
}
.guide-list a {
  display: grid; grid-template-columns: 42px 1fr auto; gap: 16px; align-items: center;
  background: var(--panel); padding: 20px 22px; color: inherit;
}
.guide-list a:hover { background: var(--btn-bg); }
.guide-list .num {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--mgr);
}
.guide-list .guide-title {
  display: block;
  font-family: 'Space Grotesk', sans-serif; font-size: 17px; font-weight: 600;
  color: var(--text); margin-bottom: 4px;
}
.guide-list .guide-body { display: block; font-size: 14px; line-height: 1.5; color: var(--dim); }
.guide-list .chev { color: var(--mute); font-size: 18px; }

.example {
  border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
  padding: 14px 16px; overflow-x: auto;
}
.example code {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--text);
  background: none; border: 0; padding: 0; white-space: pre;
}

.copy-block {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
  padding: 8px 8px 8px 16px;
}
.copy-block code {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px; color: var(--text);
  background: none; border: 0; padding: 0; min-width: 0;
  overflow-wrap: anywhere; word-break: break-word;
}
.copy-block-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  flex-shrink: 0; min-height: 44px; padding: 0 14px; margin-left: auto;
  border-radius: 8px; border: 1px solid var(--btn-border); background: var(--btn-bg);
  font-family: 'IBM Plex Sans', system-ui, sans-serif; font-size: 13px; font-weight: 500;
  color: var(--text); cursor: pointer;
}
.copy-block-btn:hover { background: var(--btn-bg-hi); border-color: var(--btn-border-hi); }
.copy-block-btn:focus-visible {
  outline: 2px solid var(--mgr); outline-offset: 2px;
}
.copy-block-btn .copy-icon,
.copy-block-btn .copy-check {
  width: 16px; height: 16px; display: block;
}
.copy-block-btn .copy-check { display: none; }
.copy-block-btn.is-copied .copy-icon { display: none; }
.copy-block-btn.is-copied .copy-check { display: block; }

.docs-prose .copy-block code {
  background: none; border: 0; padding: 0;
}

.docs-next {
  margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between;
}
.docs-next a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 16px;
  border-radius: 8px; border: 1px solid var(--border); font-size: 14px; color: var(--dim);
}
.docs-next a:hover { color: var(--text); border-color: var(--btn-border-hi); }
.docs-next .next { border-color: var(--mgr-line); color: var(--mgr-btn); }
.docs-next .next:hover { background: var(--mgr-btn-hi); color: var(--mgr-btn); }

.docs-prose ul.guide-list {
  padding-left: 0;
  list-style: none;
  gap: 1px;
}
.docs-prose .guide-list a { border-bottom: 0; }
.docs-prose .term-grid { padding-left: 0; }

@media (prefers-reduced-motion: reduce) {
  .rail-chevron { transition: none; }
  .docs-nav, .docs-nav-backdrop { transition: none; }
}

@media (max-width: 860px) {
  :root { --header-inner-y: 14px; }
  .header-inner { gap: 12px; padding: var(--header-inner-y) 16px; }
  .header-brand { align-items: center; gap: 10px; }
  .wordmark { white-space: nowrap; }
  .header-actions { display: none; }
  .site-menu-toggle { display: inline-flex; }

  .wrap.docs-shell {
    grid-template-columns: 1fr;
    grid-template-areas: "article";
    column-gap: 0;
    padding-top: 18px;
  }

  .docs-nav-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 60;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    appearance: none;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    pointer-events: none;
    cursor: pointer;
    transition: opacity 220ms ease;
  }
  .docs-nav-backdrop.is-open {
    opacity: 1;
    pointer-events: auto;
  }

  .docs-nav {
    grid-area: auto;
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0 auto 0 0;
    width: min(18rem, 100vw);
    z-index: 70;
    margin: 0;
    padding: 16px;
    background: var(--panel);
    border-right: 1px solid var(--border);
    box-shadow: 16px 0 40px rgba(0, 0, 0, 0.28);
    transform: translateX(-100%);
    pointer-events: none;
    overflow: hidden;
    transition: transform 220ms ease;
  }
  .docs-nav.is-open {
    transform: translateX(0);
    pointer-events: auto;
  }
  .docs-nav nav {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
  }

  .drawer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    box-sizing: border-box;
    min-height: var(--header-height);
    margin: -16px -16px 16px;
    padding: var(--header-inner-y) 16px;
    border-bottom: 1px solid var(--border-soft);
  }

  .rail-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    flex-shrink: 0;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border);
  }
  .rail-tools .btn:not(.theme-toggle) { white-space: nowrap; }

  .term-grid div { grid-template-columns: 1fr; gap: 6px; }
  .guide-list a { grid-template-columns: 36px 1fr; }
  .guide-list .chev { display: none; }
  .copy-block { flex-wrap: wrap; }
  .copy-block-btn { width: 100%; }
}