/* ============================================================
   fcc.cc — Site Rail (.site-rail)
   260px collapsible right-side sitemap. Replaces the legacy
   ecosystem nav with a grouped sub-site list.
   Mounted via <aside data-fcc-site-rail> or auto-injected by
   fcc-site-rail.js unless <body data-fcc-site-rail-auto="off">.
   ============================================================ */

/* ── Universal rail-gutter padding ───────────────────────────
   Every page reserves the right gutter so body content doesn't
   slide under the fixed rail. Rail state lives on <body>. */
body[data-rail="expanded"]   { padding-right: 260px; }
body[data-rail="collapsed"]  { padding-right: 48px; }

/* Default (rail not yet hydrated): no padding — avoids flash
   if rail JS hasn't run. Theme-boot doesn't set data-rail. */

/* ── Rail itself ─────────────────────────────────────────── */
.site-rail {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 260px;
  background: var(--paper);
  border-left: 1px solid var(--rule);
  font-family: var(--sans);
  color: var(--ink-2);
  z-index: 40;
  display: flex; flex-direction: column;
  transition: width .18s ease;
}
.site-rail.is-collapsed { width: 48px; }

/* Header strip */
.site-rail-head {
  padding: 14px 14px 14px 18px;
  border-bottom: 1px solid var(--rule);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
}
.site-rail.is-collapsed .site-rail-head {
  padding: 14px 0;
  justify-content: center;
}
.site-rail-brand {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
}
.site-rail-brand .strong { color: var(--ink); }
.site-rail.is-collapsed .site-rail-brand { display: none; }
.site-rail-toggle {
  width: 22px; height: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-3);
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: transparent;
  cursor: pointer;
}
.site-rail-toggle:hover { color: var(--ink); border-color: var(--ink-3); }
.site-rail-toggle svg { width: 12px; height: 12px; }

/* Scroll region */
.site-rail-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 14px 0 18px;
}
.site-rail-scroll::-webkit-scrollbar { width: 4px; }
.site-rail-scroll::-webkit-scrollbar-thumb { background: var(--rule); }

.site-rail-group { margin-bottom: 14px; }
.site-rail-grouplabel {
  padding: 6px 18px 4px;
  font-family: var(--sans);
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-4);
}
.site-rail.is-collapsed .site-rail-grouplabel {
  display: none;
}
.site-rail.is-collapsed .site-rail-group {
  margin-bottom: 6px;
  border-bottom: 1px solid var(--rule-2, var(--rule));
  padding-bottom: 6px;
}
.site-rail.is-collapsed .site-rail-group:last-child { border-bottom: 0; }

.site-rail-item {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  gap: 12px; align-items: center;
  padding: 8px 18px;
  color: var(--ink-2);
  cursor: pointer;
  border-left: 2px solid transparent;
  text-decoration: none;
}
.site-rail-item:hover {
  background: var(--paper-2);
  color: var(--ink);
}
.site-rail-item[aria-current="page"] {
  background: color-mix(in srgb, var(--c, var(--accent)) 10%, transparent);
  border-left-color: var(--c, var(--accent));
  color: var(--ink);
}
.site-rail-item .dot {
  width: 9px; height: 9px;
  background: var(--c, var(--ink-4));
  border-radius: 1px;
}
.site-rail-item .name {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.site-rail-item[aria-current="page"] .name {
  color: var(--ink);
}
.site-rail-item .meta {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--ink-4);
  letter-spacing: 0.02em;
}
.site-rail-item[aria-current="page"] .meta {
  color: var(--c, var(--accent));
}

/* Collapsed item — only show dot, centered */
.site-rail.is-collapsed .site-rail-item {
  grid-template-columns: 1fr;
  justify-items: center;
  padding: 7px 0;
  border-left: 0;
  position: relative;
}
.site-rail.is-collapsed .site-rail-item .name,
.site-rail.is-collapsed .site-rail-item .meta { display: none; }
.site-rail.is-collapsed .site-rail-item[aria-current="page"] {
  background: transparent;
}
.site-rail.is-collapsed .site-rail-item[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 2px;
  background: var(--c, var(--accent));
}
.site-rail.is-collapsed .site-rail-item .dot {
  width: 14px; height: 14px;
  border-radius: 2px;
}

/* Footer utility */
.site-rail-foot {
  border-top: 1px solid var(--rule);
  padding: 12px 14px;
  display: flex; gap: 8px;
  flex-shrink: 0;
}
.site-rail.is-collapsed .site-rail-foot {
  flex-direction: column;
  align-items: center;
  padding: 12px 6px;
}
.site-rail-util {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  padding: 7px 8px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
}
.site-rail-util:hover { color: var(--ink); border-color: var(--ink-3); }
.site-rail-util svg { width: 12px; height: 12px; }
.site-rail.is-collapsed .site-rail-util {
  flex: none;
  width: 28px; height: 28px;
  padding: 0;
  font-size: 0;
}

/* Light-mode background tweak */
[data-theme="newsprint"] .site-rail,
[data-theme="paper"] .site-rail,
[data-mode="light"] .site-rail {
  background: var(--paper-2);
}
[data-theme="newsprint"] .site-rail-item:hover,
[data-theme="paper"] .site-rail-item:hover,
[data-mode="light"] .site-rail-item:hover {
  background: var(--paper-3);
}

/* v2 Daily palette overrides — when a page declares data-theme=light/dark
   inline (fcc-old-v2 / movies-v2), it doesn't load fcc-theme-boot.js, so
   the rail's --paper-2/--ink-2/etc fall through to fcc-tokens.css's dark
   defaults. Map them to v2's cream/ink palette here. */
[data-theme="light"] {
  --paper-2: #e8dec5;
  --paper-3: #ddd0a5;
  --ink-2:   #3d342a;
  --ink-3:   #6e6657;
  --ink-4:   #8a8167;
}
[data-theme="dark"] {
  --paper-2: #26211c;
  --paper-3: #2f2924;
  --ink-2:   #d7cdb8;
  --ink-3:   #a39875;
  --ink-4:   #8a8167;
}

/* Narrow viewports — collapse rail to ribbon */
@media (max-width: 900px) {
  body[data-rail="expanded"],
  body[data-rail="collapsed"] {
    padding-right: 0;
  }
  .site-rail {
    width: 0;
    overflow: hidden;
    border-left: 0;
  }
  .site-rail.is-mobile-open {
    width: 260px;
    border-left: 1px solid var(--rule);
  }
}
