/* Class Mode Toggle — positioned at bottom of .tc-sidebar */
.tc-class-mode {
  margin-top: auto;
  padding: 10px;
  border-top: 1px solid var(--tc-border, rgba(255, 255, 255, 0.08));
}

.tc-class-mode-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--rc-ink-dim, #a9bbb1);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tc-class-mode-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--rc-ink, #e8f1ec);
}

/* Active state */
html:not(.rc-class-mode-hidden) .tc-class-mode-btn {
  color: var(--rc-brand, #35e08a);
}

/* PIN form */
.tc-class-mode-pin {
  display: none;
  padding: 10px 12px;
  margin-top: 6px;
}

.tc-class-mode-pin.open {
  display: block;
}

.tc-class-mode-pin input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--rc-border, rgba(255, 255, 255, 0.08));
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.3);
  color: var(--rc-ink, #e8f1ec);
  font-size: 16px;
  letter-spacing: 6px;
  text-align: center;
  font-family: var(--rc-mono, ui-monospace, monospace);
  box-sizing: border-box;
}

.tc-class-mode-pin input:focus {
  outline: none;
  border-color: var(--rc-brand, #35e08a);
  box-shadow: 0 0 0 2px rgba(53, 224, 138, 0.2);
}

.tc-class-mode-pin-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.tc-class-mode-pin-actions button {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--rc-border, rgba(255, 255, 255, 0.08));
  border-radius: 8px;
  background: transparent;
  color: var(--rc-ink-dim, #a9bbb1);
  font-size: 13px;
  cursor: pointer;
}

.tc-class-mode-pin-actions button.primary {
  background: var(--rc-brand, #35e08a);
  color: #0a0e0c;
  border-color: transparent;
  font-weight: 600;
}

.tc-class-mode-pin-error {
  display: none;
  color: var(--rc-danger, #ef4444);
  font-size: 12px;
  margin-top: 6px;
  text-align: center;
}

.tc-class-mode-pin-error.visible {
  display: block;
}

/* Hide label text in collapsed sidebar */
html.tc-collapsed .tc-class-mode-label {
  display: none;
}

/* Fixed bottom tab for class mode */
.tc-class-mode-tab {
  position: fixed;
  bottom: 0;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Hide the fixed tab when the sidebar is visible/expanded on desktop */
html:not(.tc-collapsed):has(.tc-sidebar) .tc-class-mode-tab {
  display: none;
}

.tc-class-mode-tab-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 36px;
  border: 1px solid var(--rc-border, rgba(255, 255, 255, 0.08));
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  background: var(--rc-base, #0b1220);
  color: var(--rc-ink-dim, #a9bbb1);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tc-class-mode-tab-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--rc-ink, #e8f1ec);
}

html:not(.rc-class-mode-hidden) .tc-class-mode-tab-btn {
  color: var(--rc-brand, #35e08a);
}

.tc-class-mode-tab-panel {
  display: none;
  width: 180px;
  padding: 10px;
  background: var(--rc-base, #0b1220);
  border: 1px solid var(--rc-border, rgba(255, 255, 255, 0.08));
  border-radius: 8px 0 0 0;
  box-sizing: border-box;
}

.tc-class-mode-tab.open .tc-class-mode-tab-panel {
  display: block;
}

.tc-class-mode-tab-panel input {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--rc-border, rgba(255, 255, 255, 0.08));
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.3);
  color: var(--rc-ink, #e8f1ec);
  font-size: 16px;
  letter-spacing: 6px;
  text-align: center;
  font-family: var(--rc-mono, ui-monospace, monospace);
  box-sizing: border-box;
}

.tc-class-mode-tab-panel input:focus {
  outline: none;
  border-color: var(--rc-brand, #35e08a);
  box-shadow: 0 0 0 2px rgba(53, 224, 138, 0.2);
}

.tc-class-mode-tab-actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.tc-class-mode-tab-actions button {
  flex: 1;
  padding: 5px 8px;
  border: 1px solid var(--rc-border, rgba(255, 255, 255, 0.08));
  border-radius: 6px;
  background: transparent;
  color: var(--rc-ink-dim, #a9bbb1);
  font-size: 13px;
  cursor: pointer;
}

.tc-class-mode-tab-actions button.primary {
  background: var(--rc-brand, #35e08a);
  color: #0a0e0c;
  border-color: transparent;
  font-weight: 600;
}

.tc-class-mode-tab-error {
  display: none;
  color: var(--rc-danger, #ef4444);
  font-size: 12px;
  margin-top: 5px;
  text-align: center;
}

.tc-class-mode-tab-error.visible {
  display: block;
}

@media (max-width: 480px) {
  .tc-class-mode-tab { right: 8px; }
}