/* ==========================================================================
   Neft Teacher — Level Switcher
   A small, self-contained "choose your level" bar that links a review /
   project page to its differentiated siblings:
     <stem>.html            → Standard
     <stem>-level-0.html    → Extra Support (IEP tier)
     <stem>-level-1.html    → Support
     <stem>-level-2.html    → Challenge / Enrichment

   Additive + non-destructive: injected before </body>, scoped under
   .nlsw-bar, system fonts only, respects prefers-reduced-motion. Hidden on
   print so it never shows up on a printed packet.
   Reference as /shared/level-switch/level-switch.css
   ========================================================================== */
.nlsw-bar {
  --nlsw-ink: #0c1b2a;
  --nlsw-line: #d8e2ee;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  max-width: 1100px;
  margin: 14px auto 0;
  padding: 12px 16px;
  background: #ffffff;
  border: 1px solid var(--nlsw-line);
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(12, 27, 42, 0.08);
}
.nlsw-label {
  font-weight: 800;
  font-size: 0.98rem;
  color: var(--nlsw-ink);
  margin-right: 4px;
}
.nlsw-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.nlsw-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 2px solid var(--nlsw-line);
  background: #f3f7fc;
  color: var(--nlsw-ink);
  font-size: 0.98rem;
  font-weight: 700;
  text-decoration: none;
  line-height: 1.2;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    background 0.18s ease;
}
.nlsw-pill .nlsw-emoji {
  font-size: 1.15rem;
}
.nlsw-pill:hover,
.nlsw-pill:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(12, 27, 42, 0.14);
  outline: none;
}
.nlsw-pill:focus-visible {
  box-shadow: 0 0 0 3px rgba(23, 99, 199, 0.45);
}
.nlsw-pill[aria-current="page"] {
  cursor: default;
  pointer-events: none;
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, #1763c7, #0c3f86);
  box-shadow: 0 6px 16px rgba(12, 63, 134, 0.3);
}
/* level accent tints (non-current state) */
.nlsw-pill[data-lvl="0"] {
  background: #eafaf1;
  border-color: #bce8cf;
}
.nlsw-pill[data-lvl="1"] {
  background: #eaf3fe;
  border-color: #bcd9f6;
}
.nlsw-pill[data-lvl="2"] {
  background: #f1ecfd;
  border-color: #d6c8f5;
}

@media (max-width: 540px) {
  .nlsw-bar {
    border-radius: 0;
    margin-top: 0;
  }
  .nlsw-label {
    width: 100%;
  }
}
@media print {
  .nlsw-bar {
    display: none !important;
  }
}
@media (prefers-reduced-motion: reduce) {
  .nlsw-pill {
    transition: none;
  }
  .nlsw-pill:hover,
  .nlsw-pill:focus-visible {
    transform: none;
  }
}