/* FAST4U Ecosystem Tree — v002.000.000 "Breadcrumb pill + mini mega-menu" (2026-10-28) — ultra-compact footer */
.f4u-t2 { position: relative; display: inline-flex; min-width: 0; max-width: 100%; vertical-align: middle;
  --t2-accent: var(--f4u-ecosystem-accent, var(--f4u-cyan, #00c4ff));
  --t2-text: var(--f4u-text-main, #f5f7fb); --t2-muted: var(--f4u-text-secondary, #a9b6c8);
  --t2-bg: #0a111c; --t2-line: rgba(255, 255, 255, 0.10);
  font-family: var(--f4u-font-mono, ui-monospace, SFMono-Regular, Menlo, monospace); }
.f4u-t2 *, .f4u-t2 *::before { box-sizing: border-box; }
.f4u-t2__pill { display: inline-flex; align-items: center; gap: 6px; min-width: 0; max-width: 100%; height: 24px; padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--t2-accent) 40%, transparent); border-radius: 999px;
  background: color-mix(in srgb, var(--t2-accent) 8%, transparent); color: var(--t2-accent);
  font-family: inherit; font-size: 10px; font-weight: 700; line-height: 1; letter-spacing: 0.06em; cursor: pointer; transition: background-color .18s, border-color .18s, color .18s; }
.f4u-t2__pill:hover, .f4u-t2.is-open .f4u-t2__pill { border-color: var(--t2-accent); background: color-mix(in srgb, var(--t2-accent) 16%, transparent); color: #fff; }
.f4u-t2__pill:focus-visible { outline: 2px solid var(--t2-accent); outline-offset: 2px; }
.f4u-t2__crumb { overflow: hidden; min-width: 0; text-overflow: ellipsis; white-space: nowrap; text-transform: none; }
.f4u-t2__crumb i, .f4u-t2__here i { margin: 0 4px; font-style: normal; opacity: .6; }
.f4u-t2__chev { flex: 0 0 auto; transition: transform .18s; }
.f4u-t2.is-open .f4u-t2__chev { transform: rotate(180deg); }
.f4u-t2__menu { position: absolute; right: 0; bottom: calc(100% + 8px); z-index: 100000; width: max-content; max-width: min(560px, calc(100vw - 24px));
  padding: 10px 12px 12px; border: 1px solid var(--t2-line); border-radius: 12px; background: var(--t2-bg);
  box-shadow: 0 16px 48px rgba(0, 0, 0, .55); text-transform: none; letter-spacing: normal; }
.f4u-t2__menu[hidden] { display: none; }
.f4u-t2__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; margin-bottom: 8px; padding-bottom: 7px;
  border-bottom: 1px solid var(--t2-line); color: var(--t2-accent); font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.f4u-t2__here { color: var(--t2-muted); letter-spacing: .04em; text-transform: none; }
.f4u-t2__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 6px 16px; }
.f4u-t2__col ul { margin: 3px 0 0; padding: 0 0 0 8px; border-left: 1px solid var(--t2-line); list-style: none; }
.f4u-t2__col li { margin: 0; }
.f4u-t2__root, .f4u-t2__link { display: block; padding: 2px 0; color: var(--t2-muted); font-size: 11px; line-height: 1.45; text-decoration: none; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.f4u-t2__root { color: var(--t2-text); font-weight: 800; }
.f4u-t2__col.has-current > .f4u-t2__root { color: var(--t2-accent); }
a.f4u-t2__root:hover, a.f4u-t2__link:hover { color: var(--t2-accent); text-decoration: underline; text-underline-offset: 3px; }
.f4u-t2 .is-current { color: var(--t2-accent) !important; font-weight: 800; }
.f4u-t2 .is-current::before { content: "\25CF\00a0"; font-size: 8px; vertical-align: 1px; }
.f4u-t2 .is-off { opacity: .55; cursor: default; }
.f4u-t2 .is-off em { font-style: normal; font-size: 9px; color: var(--t2-accent); }
@media (max-width: 640px) {
  .f4u-t2 { position: static; }
  .f4u-t2__menu { position: fixed; right: 8px; bottom: 84px; left: 8px; width: auto; max-width: none; max-height: calc(100vh - 140px); overflow: auto; }
  .f4u-t2__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) { .f4u-t2 * { transition: none !important; } }