/* ============================================================
   Shared site navigation. Uses the existing design tokens, so it
   inherits whatever palette the host page already defines.
   ============================================================ */
.sitenav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: rgba(7, 9, 12, .92);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line, #1e252b);
}

.sitenav-burger {
  display: flex; flex-direction: column; justify-content: center; gap: 4px;
  width: 40px; height: 36px; padding: 0 9px; flex-shrink: 0;
  background: transparent; border: 1px solid var(--line, #1e252b);
  border-radius: 2px; cursor: pointer;
  transition: border-color .15s ease;
}
.sitenav-burger:hover { border-color: var(--signal, #ff4d2e); }
.sitenav-burger:focus-visible { outline: 2px solid var(--signal, #ff4d2e); outline-offset: 2px; }
.sitenav-burger i {
  display: block; height: 2px; border-radius: 2px;
  background: var(--signal, #ff4d2e);
  transition: transform .2s ease, opacity .2s ease;
}
.sitenav-burger[aria-expanded="true"] i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.sitenav-burger[aria-expanded="true"] i:nth-child(2) { opacity: 0; }
.sitenav-burger[aria-expanded="true"] i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.sitenav-brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: inherit; min-width: 0;
}
/* the mark is pure black on transparency, so it needs inverting to be
   visible at all against the dark bar */
.sitenav-logo {
  height: 26px; width: auto; flex-shrink: 0;
  filter: brightness(0) invert(0.85);
  transition: filter .15s ease;
}
.sitenav-brand:hover .sitenav-logo { filter: brightness(0) invert(1); }
.sitenav-name {
  font-family: var(--mono, monospace); font-size: .84rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--text, #d7dbde); white-space: nowrap;
}
.sitenav-brand:hover .sitenav-name { color: var(--signal, #ff4d2e); }

.sitenav-here {
  font-family: var(--mono, monospace); font-size: .78rem;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-faint, #4b545c); white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.sitenav-here::before { content: "/ "; }

/* ---------- slide-over panel ---------- */
.sitenav-scrim {
  position: fixed; inset: 0; z-index: 110;
  background: rgba(0, 0, 0, .62);
  opacity: 0; pointer-events: none; transition: opacity .25s ease;
}
.sitenav-scrim.show { opacity: 1; pointer-events: auto; }

.sitenav-panel {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 120;
  width: min(88vw, 330px);
  background: #0b0e12;
  border-right: 1px solid var(--line, #1e252b);
  padding: 22px 0 40px;
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  transform: translateX(-100%);
  transition: transform .26s cubic-bezier(.4, .1, .2, 1);
  box-shadow: 0 0 46px rgba(0, 0, 0, .65);
}
.sitenav-panel.open { transform: translateX(0); }
body.sitenav-open { overflow: hidden; }

.sitenav-heading {
  font-family: var(--mono, monospace); font-size: .64rem;
  letter-spacing: .24em; text-transform: uppercase;
  color: var(--text-faint, #4b545c);
  margin: 0 0 10px; padding: 0 20px;
}
.sitenav-heading::before { content: "// "; color: var(--signal, #ff4d2e); }
.sitenav-panel .sitenav-heading + .sitenav-heading,
.sitenav-panel > .sitenav-heading:not(:first-child) { margin-top: 26px; }

.sitenav-list { list-style: none; margin: 0 0 4px; padding: 0 12px; }
.sitenav-list a {
  display: flex; flex-direction: column; gap: 2px;
  padding: 11px 12px; border-radius: 2px;
  text-decoration: none; border-left: 2px solid transparent;
  transition: background-color .15s ease, border-color .15s ease;
}
.sitenav-list a:hover { background: #12161c; border-left-color: var(--line-bright, #313a42); }
.sitenav-list a:focus-visible { outline: 2px solid var(--signal, #ff4d2e); outline-offset: -2px; }
.sitenav-list a[aria-current="page"] {
  background: #12161c; border-left-color: var(--signal, #ff4d2e);
}
.sn-label {
  font-family: var(--mono, monospace); font-size: .88rem; font-weight: 500;
  letter-spacing: .04em; color: var(--text, #d7dbde);
}
.sitenav-list a[aria-current="page"] .sn-label { color: var(--signal, #ff4d2e); }
.sn-note {
  font-family: var(--sans, sans-serif); font-size: .7rem; line-height: 1.4;
  color: var(--text-faint, #4b545c);
}

/* Atlas' three ways in, nested under it */
.sitenav-sublist {
  list-style: none; margin: 2px 0 6px; padding: 0 0 0 14px;
  border-left: 1px solid var(--line, #1e252b); margin-left: 12px;
}
.sitenav-sublist a { padding: 8px 12px; }
.sitenav-sublist .sn-label { font-size: .8rem; font-weight: 400; }
.sitenav-sublist .sn-note { font-size: .66rem; }
.sitenav-list a.sn-sub:hover { border-left-color: transparent; }

/* a page's own rail folded into the panel (the docs section list) */
.sitenav-folded {
  position: static !important;
  transform: none !important;
  width: auto !important; height: auto !important;
  border: 0 !important; box-shadow: none !important;
  background: transparent !important;
  padding: 0 12px !important;
  overflow: visible !important;
}
.sitenav-folded .back { display: none !important; }

@media (max-width: 560px) {
  .sitenav { padding: 9px 12px; gap: 10px; }
  .sitenav-name { font-size: .76rem; letter-spacing: .08em; }
  .sitenav-here { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sitenav-panel, .sitenav-scrim, .sitenav-burger i { transition: none !important; }
}

/* ============================================================
   Shared contact footer
   Small print on every page. Closed it is one line, open it is
   the three routes to me, each with what it is best for.
   ============================================================ */
.sitecontact {
  max-width: 1200px;
  margin: 0 auto;
  padding: 26px 20px 40px;
  font-family: var(--mono, "IBM Plex Mono", ui-monospace, monospace);
  position: relative;
  z-index: 1;
  text-align: center;
}
.sitecontact-box { display: inline-block; text-align: left; }
.sitecontact-box summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--text-faint, #4b545c);
  padding: 4px 2px;
  transition: color .15s ease;
}
.sitecontact-box summary::-webkit-details-marker { display: none; }
.sitecontact-box summary::after {
  content: "[+]";
  color: var(--text-faint, #4b545c);
}
.sitecontact-box[open] summary::after { content: "[-]"; }
.sitecontact-box summary:hover,
.sitecontact-box[open] summary { color: var(--text-dim, #7d8891); }
.sitecontact-box summary:hover::after { color: var(--signal, #ff4d2e); }
.sitecontact-box summary:focus-visible {
  outline: 2px solid var(--signal, #ff4d2e);
  outline-offset: 3px;
}

.sitecontact-opts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}
.sitecontact-opts a {
  display: block;
  min-width: 168px;
  padding: 9px 13px;
  text-decoration: none;
  background: var(--panel, #0e1116);
  border: 1px solid var(--line, #1e252b);
  border-left: 2px solid var(--line-bright, #313a42);
  transition: border-color .15s ease, background .15s ease;
}
.sitecontact-opts a:hover,
.sitecontact-opts a:focus-visible {
  background: var(--panel-raised, #12161c);
  border-left-color: var(--signal, #ff4d2e);
  outline: none;
}
.sitecontact-opts .sc-label {
  display: block;
  font-size: .78rem;
  color: var(--text, #d7dbde);
}
.sitecontact-opts .sc-note {
  display: block;
  margin-top: 2px;
  font-size: .66rem;
  color: var(--text-faint, #4b545c);
}

@media (max-width: 560px) {
  .sitecontact { padding: 22px 16px 34px; }
  .sitecontact-box { display: block; text-align: center; }
  .sitecontact-opts a { min-width: 0; width: 100%; }
}