/* Self-hosted IBM Plex Sans — system installs that only ship Bold make body text look heavy. */
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2");
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--sans);
  font-weight: 400;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
.site-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
}
.header-end {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.site-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius);
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
}
.site-cta:hover { opacity: 0.92; }
.site-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}
/* IBM-like left TOC rail (Pulse accent); TOC is first child, grid places it in column 1 */
.site-main:has(> .toc) {
  display: grid;
  grid-template-columns: minmax(10rem, 13rem) minmax(0, 1fr);
  column-gap: 2.5rem;
  align-items: start;
}
.site-main:has(> .toc) > .toc {
  grid-column: 1;
  grid-row: 1 / span 100;
}
.site-main:has(> .toc) > :not(.toc) {
  grid-column: 2;
  min-width: 0;
  max-width: 42rem;
}
.toc {
  position: sticky;
  top: 5rem;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--border);
}
.toc-title {
  margin: 0 0 0.75rem;
  padding-left: 0.85rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.toc li { margin: 0; }
.toc a {
  display: block;
  margin-left: -1px;
  padding: 0.4rem 0.5rem 0.4rem 0.85rem;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.875rem;
  line-height: 1.35;
  transition: color var(--duration-fast, 150ms) var(--ease-productive, ease),
    border-color var(--duration-fast, 150ms) var(--ease-productive, ease);
}
.toc a:hover {
  color: var(--text);
}
.toc a.active,
.toc a[aria-current="location"] {
  color: var(--text);
  border-left-color: var(--accent);
  font-weight: 500;
}
.toc a:focus-visible {
  outline: 2px solid var(--focus-color, var(--accent));
  outline-offset: var(--focus-offset, 2px);
}
.site-main h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}
.site-main h2 {
  font-size: 1.35rem;
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.02em;
}
.site-main p { color: var(--text); }
.site-main .docs a, .site-main .page-nav a { color: var(--accent); }
pre, code { font-family: var(--mono); }
pre {
  background: var(--code-bg);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  overflow: auto;
}
.site-main table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
.site-main th, .site-main td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.5rem;
  text-align: left;
}
.site-main th { background: var(--code-bg); }
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  color: var(--muted);
  font-size: 0.875rem;
}
.page-nav { display: flex; justify-content: space-between; margin-top: 2rem; gap: 1rem; }
.page-nav a { color: var(--accent); }
@media (max-width: 800px) {
  .site-main:has(> .toc) {
    display: block;
  }
  .site-main:has(> .toc) > :not(.toc) {
    max-width: none;
  }
  .toc {
    position: static;
    border-left: 0;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    margin-bottom: 1.25rem;
  }
  .toc a {
    margin-left: 0;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding-left: 0;
  }
  .toc a.active,
  .toc a[aria-current="location"] {
    border-bottom-color: var(--accent);
  }
}
@media (max-width: 640px) {
  .site-header { flex-wrap: wrap; }
  .header-end { width: 100%; justify-content: flex-end; }
}