/* =============================================================================
 * Neft Teacher — Save / Resume UI styles
 * Scoped under #nsr-root so it cannot leak into or be overridden by host pages.
 * High-contrast, large touch targets, no tiny text (min 0.95rem), keyboard-safe.
 * ========================================================================== */
#nsr-root,
#nsr-root * {
  box-sizing: border-box;
}

#nsr-root {
  /* Design tokens — kept local so they never collide with lesson variables. */
  --nsr-bg: #ffffff;
  --nsr-fg: #14233b;
  --nsr-muted: #4a5a72;
  --nsr-accent: #1d4ed8; /* AA-contrast blue */
  --nsr-accent-fg: #ffffff;
  --nsr-ok: #15803d;
  --nsr-warn: #b45309;
  --nsr-err: #b91c1c;
  --nsr-border: #c9d4e5;
  --nsr-shadow: 0 10px 30px rgba(10, 25, 50, 0.25);
  --nsr-radius: 14px;

  position: fixed;
  z-index: 2147483000; /* above almost everything, below nothing it needs */
  right: 16px;
  bottom: 16px;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    sans-serif;
  font-size: 16px;
  line-height: 1.4;
  color: var(--nsr-fg);
}

/* ---- Floating launcher ---- */
#nsr-launcher {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--nsr-accent);
  color: var(--nsr-accent-fg);
  border: 2px solid transparent;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--nsr-shadow);
  transition:
    transform 0.12s ease,
    filter 0.12s ease;
}
#nsr-launcher:hover {
  filter: brightness(1.05);
}
#nsr-launcher:active {
  transform: translateY(1px);
}
#nsr-launcher:focus-visible {
  outline: 3px solid #f59e0b;
  outline-offset: 2px;
}
.nsr-launcher-ico {
  font-size: 1.1rem;
}
.nsr-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #cbd5e1;
  display: inline-block;
}
.nsr-dot-saving {
  background: #fbbf24;
}
.nsr-dot-saved,
.nsr-dot-saved-local {
  background: #34d399;
}
.nsr-dot-offline {
  background: #f59e0b;
}
.nsr-dot-error {
  background: #f87171;
}

/* ---- Panel ---- */
#nsr-panel {
  position: absolute;
  right: 0;
  bottom: 58px;
  width: min(340px, calc(100vw - 32px));
  max-height: min(78vh, 640px);
  overflow: auto;
  background: var(--nsr-bg);
  color: var(--nsr-fg);
  border: 1px solid var(--nsr-border);
  border-radius: var(--nsr-radius);
  box-shadow: var(--nsr-shadow);
  padding: 16px;
  display: none;
}
#nsr-root.nsr-open #nsr-panel {
  display: block;
}
#nsr-root.nsr-open #nsr-launcher {
  border-color: #f59e0b;
}

.nsr-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}
.nsr-title {
  font-size: 1.05rem;
}
.nsr-x {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--nsr-muted);
  padding: 2px 8px;
  border-radius: 8px;
}
.nsr-x:hover {
  background: #eef2f8;
}
.nsr-x:focus-visible {
  outline: 3px solid var(--nsr-accent);
}

.nsr-status {
  margin: 2px 0 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--nsr-muted);
}
.nsr-lead {
  margin: 0 0 10px;
  font-size: 0.95rem;
  color: var(--nsr-fg);
}

.nsr-field {
  display: block;
  margin-bottom: 10px;
}
.nsr-field > span {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--nsr-muted);
}
.nsr-field input {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--nsr-border);
  border-radius: 10px;
  color: var(--nsr-fg);
  background: #fbfcfe;
}
.nsr-field input:focus-visible {
  outline: 3px solid var(--nsr-accent);
  outline-offset: 1px;
}

.nsr-btn {
  display: block;
  width: 100%;
  padding: 11px 14px;
  margin: 6px 0;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 10px;
  border: 1px solid var(--nsr-border);
  background: #f1f5fb;
  color: var(--nsr-fg);
  cursor: pointer;
}
.nsr-btn:hover {
  filter: brightness(0.98);
}
.nsr-btn:focus-visible {
  outline: 3px solid var(--nsr-accent);
  outline-offset: 1px;
}
.nsr-btn-primary {
  background: var(--nsr-accent);
  color: var(--nsr-accent-fg);
  border-color: var(--nsr-accent);
}
.nsr-btn-ghost {
  background: transparent;
  color: var(--nsr-muted);
  border-color: transparent;
  text-decoration: underline;
}

.nsr-or {
  text-align: center;
  color: var(--nsr-muted);
  font-size: 0.85rem;
  margin: 8px 0;
}
.nsr-err {
  color: var(--nsr-err);
  font-size: 0.9rem;
  margin: 6px 0 0;
  min-height: 1em;
  font-weight: 600;
}

.nsr-code {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-align: center;
  background: #eef4ff;
  border: 2px dashed var(--nsr-accent);
  border-radius: 12px;
  padding: 12px;
  margin: 6px 0 10px;
  color: var(--nsr-fg);
  user-select: all;
}
.nsr-code:focus-visible {
  outline: 3px solid var(--nsr-accent);
}

.nsr-meta {
  margin: 10px 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.nsr-meta dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--nsr-muted);
  font-weight: 700;
}
.nsr-meta dd {
  margin: 2px 0 0;
  font-size: 0.95rem;
  word-break: break-word;
}

.nsr-foot {
  margin: 10px 0 0;
  font-size: 0.8rem;
  color: var(--nsr-muted);
  text-align: center;
}

/* ---- Toast ---- */
#nsr-toast {
  position: absolute;
  right: 0;
  bottom: 58px;
  background: var(--nsr-fg);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  box-shadow: var(--nsr-shadow);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
  max-width: min(320px, calc(100vw - 32px));
}
#nsr-toast.nsr-toast-show {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Dark-mode friendliness (respects host pages that opt into dark) ---- */
@media (prefers-color-scheme: dark) {
  #nsr-root {
    --nsr-bg: #0f1b2d;
    --nsr-fg: #eaf1fb;
    --nsr-muted: #a9b8cf;
    --nsr-border: #2b3a52;
    --nsr-accent: #3b82f6;
  }
  .nsr-field input {
    background: #16243a;
  }
  .nsr-btn {
    background: #1b2c46;
  }
  .nsr-code {
    background: #16243a;
  }
  .nsr-x:hover {
    background: #1b2c46;
  }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  #nsr-launcher,
  #nsr-toast {
    transition: none;
  }
}

/* ---- Print: hide the widget entirely ---- */
@media print {
  #nsr-root {
    display: none !important;
  }
}