/* ==========================================================================
   Neft Teacher — Projects TEACHER/STUDENT MODE chip (shared)

   Top-RIGHT on purpose. The bottom dock on a project page is full and its
   spacing is a documented contract (projects-coach.css: Save/Resume pill at
   bottom:16, Math Workbench FAB at bottom:72, .ntf-fab moved bottom-left,
   coach launcher at bottom:132). Adding a fifth floating control down there
   would collide with one of them at some viewport width. The top-right corner
   is empty on every project page.

   Sizes follow WCAG 2.2 target guidance (24×24 minimum) with a comfortable
   44px floor on the primary action, because these pages are used on
   Chromebooks and tablets.
   ========================================================================== */

.ntmp {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 9003; /* above the coach launcher (9002), below the zoom overlay */
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: "Inter", system-ui, sans-serif;
}

@media print {
  .ntmp {
    display: none !important;
  }
}

/* Stand down while the support-level gate is up. projects-gold.css states the
   contract explicitly — "while a student is choosing a support level nothing
   should float over the gate" — so this chip waits rather than raising its
   z-index above it. The overlay is REMOVED from the DOM once a level is
   chosen (projects-gold.js), not just faded, so the chip reappears on its own. */
body:has(#gold-level-overlay) .ntmp {
  display: none;
}

/* ---- the chip itself ---- */
.ntmp-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 6px 12px;
  border: 1px solid rgba(15, 43, 60, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #525f6e;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  box-shadow: 0 1px 6px rgba(15, 43, 60, 0.12);
  backdrop-filter: blur(4px);
}

.ntmp-chip:hover {
  background: #fff;
  color: #1a2633;
}

.ntmp-chip:focus-visible {
  outline: 3px solid #1a6fb5;
  outline-offset: 2px;
}

/* Teacher mode ON — deliberately loud. A teacher who does not notice they are
   still in teacher mode is how an answer key ends up on a projector. */
.ntmp-chip.is-teacher {
  min-height: 44px;
  padding: 8px 14px;
  border-color: #8a5f0a;
  background: #fdf3e0;
  color: #6b4a08;
  font-size: 0.88rem;
  cursor: default;
}

.ntmp-exit {
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid #8a5f0a;
  border-radius: 999px;
  background: #8a5f0a;
  color: #fff;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  box-shadow: 0 1px 6px rgba(15, 43, 60, 0.18);
}

.ntmp-exit:hover {
  background: #6b4a08;
}

.ntmp-exit:focus-visible {
  outline: 3px solid #1a2633;
  outline-offset: 2px;
}

/* ---- PIN form (entry only) ---- */
.ntmp-form {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px;
  border: 1px solid rgba(15, 43, 60, 0.18);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 4px 18px rgba(15, 43, 60, 0.18);
}

.ntmp-form input[type="password"] {
  width: 148px;
  min-height: 40px;
  padding: 6px 10px;
  border: 1px solid #cfd8e0;
  border-radius: 8px;
  font: inherit;
  font-size: 0.9rem;
}

.ntmp-form button {
  min-height: 40px;
  padding: 6px 12px;
  border: 0;
  border-radius: 8px;
  background: #1a6fb5;
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.ntmp-form button:hover {
  background: #14588f;
}

/* The username field exists ONLY so password managers recognise this as a
   credential form and offer to save/autofill the PIN. It must stay in the
   accessibility tree and must NEVER be display:none — managers skip those.
   Same technique and same reason as .nt-credential-user in
   engine/styles/design-system.css. */
.ntmp-cred-user {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.ntmp-err {
  margin-left: 4px;
  color: #a8442a;
  font-size: 0.8rem;
  font-weight: 600;
}

@media (max-width: 640px) {
  .ntmp {
    top: 8px;
    right: 8px;
  }
  .ntmp-chip,
  .ntmp-exit {
    font-size: 0.78rem;
  }
  .ntmp-form input[type="password"] {
    width: 112px;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .ntmp-chip,
  .ntmp-exit {
    transition:
      background 0.15s ease,
      color 0.15s ease;
  }
}