/* ══════════════════════════════
   BOTTOM NAV — mobile only
══════════════════════════════ */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  display: flex; align-items: stretch;
  z-index: var(--z-topbar);
  box-shadow: 0 -2px 12px rgba(15,23,42,.06);
}
.bottom-nav__item {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 3px;
  color: var(--text-muted); padding: 8px 4px;
  transition: color var(--ease); position: relative;
  text-decoration: none; min-height: 44px;
}
.bottom-nav__item:active { transform: scale(.93); }
.bottom-nav__item.active { color: var(--primary); }
.bottom-nav__item.active::before {
  content: '';
  position: absolute; top: 0; left: 20%; right: 20%;
  height: 2.5px; background: var(--primary);
  border-radius: 0 0 999px 999px;
}
.bottom-nav__icon { width: 22px; height: 22px; stroke-width: 1.8; }
.bottom-nav__item.active .bottom-nav__icon { stroke-width: 2.3; }
.bottom-nav__label { font-size: 10px; font-family: var(--font); font-weight: 500; line-height: 1; }

/* FAB */
.bottom-nav__item--fab { position: relative; }
.bottom-nav__item--fab .bottom-nav__label {
  position: absolute; bottom: 5px; left: 50%;
  transform: translateX(-50%); white-space: nowrap; font-size: 9px;
}
.bottom-nav__fab {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, #2563EB 0%, #1D4ED8 100%);
  color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px rgba(37,99,235,.4);
  margin-top: -16px; flex-shrink: 0;
  transition: transform var(--ease-spring), box-shadow var(--ease);
}
.bottom-nav__item--fab:active .bottom-nav__fab {
  transform: scale(.9);
  box-shadow: 0 2px 8px rgba(37,99,235,.3);
}
@media (min-width: 768px) { .bottom-nav { display: none; } }