/* ============================================================
   /developers/dev-nav.css — shared left nav for all developer
   surfaces. Loaded by /developers/, /developers/api/, and
   /developers/api/reference/.

   Posture: Linear-quiet. 260px left rail, sticky under m-nav,
   collapses off-screen on narrow viewports. One group header
   per section, small mono caps, no chrome.

   Depends on: tokens.css loaded first.
   ============================================================ */

.dev-nav {
  position: fixed;
  top: 64px;
  left: 0;
  bottom: 0;
  width: 260px;
  padding: 28px 0 32px;
  overflow-y: auto;
  background: var(--paper);
  border-right: 1px solid var(--hairline);
  z-index: 5;
  scrollbar-width: thin;
  scrollbar-color: var(--hairline-strong) transparent;
  /* above grain overlay */
}
.dev-nav::-webkit-scrollbar { width: 6px; }
.dev-nav::-webkit-scrollbar-thumb { background: var(--hairline); border-radius: 3px; }

/* Header block — small wordmark + section label */
.dev-nav-header {
  padding: 0 24px 22px;
  margin-bottom: 10px;
  border-bottom: 1px solid transparent;
  border-image: linear-gradient(90deg, var(--hairline-strong) 0%, transparent 100%) 1;
}
.dev-nav-brand {
  display: inline-flex; align-items: center;
  text-decoration: none; color: inherit;
}
.dev-nav-brand:hover .dev-nav-title { color: var(--ember); }
.dev-nav-title {
  font-family: var(--serif); font-weight: 500;
  font-variation-settings: "opsz" 24;
  font-size: 19px; letter-spacing: -0.01em;
  color: var(--ink);
  transition: color var(--dur-fast);
}
.dev-nav-version {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 10px;
  font-family: var(--mono); font-size: 10px;
  letter-spacing: var(--tracking-wide); text-transform: uppercase;
  color: var(--ink-quiet);
}
.dev-nav-version .dot {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--coral);
  box-shadow: 0 0 0 3px var(--coral-wash);
  animation: breathe 3.2s ease-in-out infinite;
}

/* Groups */
.dev-nav-groups { padding: 0; }
.dev-nav-group { margin-bottom: 22px; }

/* Bare list — single items without a group label.
   Used for top-level entries like "The hub" and "System status"
   that don't warrant their own group header. */
.dev-nav-bare {
  list-style: none; padding: 0; margin: 0 0 22px;
}
.dev-nav-bare:last-child { margin-bottom: 0; }
.dev-nav-bare li { margin: 0; padding: 0; }
.dev-nav-bare a {
  display: block;
  padding: 7px 24px;
  font-family: var(--sans); font-size: 13.5px;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.dev-nav-bare a:hover { color: var(--ink); background: var(--surface-soft); }
.dev-nav-bare a.active {
  color: var(--coral);
  border-left-color: var(--coral);
  background: var(--surface-soft);
  font-weight: 500;
}
.dev-nav-bare a .ext {
  margin-left: 6px;
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-faint);
}
.dev-nav-group-title {
  display: block;
  padding: 0 24px 8px;
  font-family: var(--mono); font-size: 10px;
  letter-spacing: var(--tracking-widest); text-transform: uppercase;
  color: var(--ink-quiet);
}
.dev-nav-group ul {
  list-style: none; padding: 0; margin: 0;
}
.dev-nav-group li { margin: 0; padding: 0; }
.dev-nav-group a {
  display: block;
  padding: 7px 24px 7px 24px;
  font-family: var(--sans); font-size: 13.5px;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.dev-nav-group a:hover {
  color: var(--ink);
  background: var(--surface-soft);
}
.dev-nav-group a.active {
  color: var(--coral);
  border-left-color: var(--coral);
  background: var(--surface-soft);
  font-weight: 500;
}

/* Section anchors (sub-items under an active page) */
.dev-nav-sub {
  display: none;
  margin: 4px 0 8px;
  padding: 6px 0;
  border-left: 1px solid var(--hairline);
  margin-left: 24px;
}
.dev-nav-sub.open { display: block; }
.dev-nav-sub a {
  padding: 5px 16px 5px 14px;
  font-size: 12.5px;
  color: var(--ink-quiet);
  border-left: 0;
  margin-left: 0;
}
.dev-nav-sub a:hover { color: var(--ink); background: transparent; }
.dev-nav-sub a.active {
  color: var(--coral);
  border-left: 0;
  background: transparent;
  font-weight: 500;
}

/* External-link indicator */
.dev-nav-group a .ext {
  margin-left: 6px;
  font-family: var(--mono); font-size: 10px;
  color: var(--ink-faint);
}

/* (dev-nav-foot removed — redundant with m-footer below) */

/* ── App-shell layout overrides (≥ 1100px only) ────────────
   On developer pages, the whole page becomes an app shell:
     m-nav spans edge-to-edge (wordmark ↔ CTA anchored to
       viewport sides, no 1200px max-width centering)
     side nav sticks to the left (0–260px)
     main content + footer clear the 260px nav
   Below 1100px the layout reverts to the site's normal
   centered-container behavior.
   ─────────────────────────────────────────────────────────── */
@media (min-width: 1100px) {
  /* Top nav: edge-to-edge, 24px gutter.
     Wordmark left edge aligns with the dev-nav header's
     "Developers" label (also 24px from viewport left).
     CTA right edge sits 24px from viewport right. */
  .m-nav-inner {
    max-width: none;
    padding: 0 24px;
  }

  /* Main content + footer clear the fixed side nav.
     .cl is the changelog wrapper — shares the same shell. */
  .dev-wrap,
  .api-wrap,
  .cl,
  .m-footer {
    padding-left: 260px;
  }
  /* Content columns still center within (viewport - 260px). */
}

/* ── Narrow: hide the nav. Hamburger handled separately. ─ */
@media (max-width: 1099px) {
  .dev-nav { display: none; }
}

/* ── Mobile drawer (future — stubbed for now) ───────────── */
.dev-nav.open { display: block; }