/* nav.css — the left-edge scroll-spy: thin ticks that bloom into a labeled TOC
   on hover, active section highlighted in the accent. Depends on tokens.css. */
.section-nav {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 15;
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: var(--s-4) var(--s-3) var(--s-4) var(--s-4);
  border: 1px solid transparent;
  border-radius: 0 var(--r-md) var(--r-md) 0;
  transition: background var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease),
    backdrop-filter var(--dur-2) var(--ease);
}
/* On hover the rail becomes a soft panel and the labels appear. */
.section-nav:hover {
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
  border-color: var(--border-soft);
  box-shadow: var(--shadow-2);
}

.section-nav-link {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 4px 0;
  text-decoration: none;
}
.section-nav-tick {
  flex: 0 0 auto;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink-4);
  transition: background var(--dur-1) var(--ease), width var(--dur-1) var(--ease);
}
.section-nav-link:hover .section-nav-tick { background: var(--ink-2); width: 22px; }
.section-nav-link.is-active .section-nav-tick { background: var(--accent); width: 26px; }

.section-nav-label {
  font-family: var(--font-mono);
  font-size: var(--t-label);
  color: var(--ink-3);
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-6px);
  pointer-events: none;
  transition: opacity var(--dur-1) var(--ease), transform var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.section-nav:hover .section-nav-label { opacity: 1; transform: none; }
.section-nav-link:hover .section-nav-label { color: var(--ink-2); }
.section-nav-link.is-active .section-nav-label { color: var(--ink); }

@media (max-width: 1180px) {
  .section-nav { display: none; }
}

/* ── Site footer ──────────────────────────────────────────────────────────
   Global, subtle: identity left, legitimacy links right, hairline on top. */
#siteFooter { border-top: 1px solid var(--border-soft); margin-top: var(--s-16); }
.foot-wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--s-6) var(--content-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5) var(--s-8);
  flex-wrap: wrap;
}
.foot-id { display: flex; flex-direction: column; gap: 3px; }
.foot-brand {
  font-family: var(--font-ui); font-weight: var(--w-semi); font-size: var(--t-sm);
  letter-spacing: -0.02em; text-decoration: none;
}
.foot-brand .wm-brand { color: var(--ink-2); }
.foot-brand .wm-curl { color: var(--ink-3); }
.foot-meta { font-family: var(--font-mono); font-size: var(--t-micro); color: var(--ink-4); }
.foot-links { display: flex; gap: var(--s-5); flex-wrap: wrap; }
.foot-links a {
  font-family: var(--font-mono); font-size: var(--t-label); color: var(--ink-3);
  text-decoration: none; transition: color var(--dur-1) var(--ease);
}
.foot-links a:hover { color: var(--ink); }