/* ================================================
   Collaboration UI — connection indicator, remote
   cursors, modals, user list, sync status
   ================================================ */

/* ---- Connection indicator (top-right of canvas) ---- */
.collab-indicator {
  position: fixed;
  top: 50px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--surface);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text);
  z-index: 100;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}
.collab-indicator.active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.collab-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  transition: background 0.3s;
}
.collab-indicator.connected .collab-dot {
  background: #2ecc71;
  animation: collab-pulse 2s infinite;
}
@keyframes collab-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.collab-room-info {
  font-weight: 600;
}

/* ---- Remote cursors (DOM overlay, not canvas) ---- */
.remote-cursor {
  position: fixed;
  pointer-events: none;
  z-index: 200;
  transition: transform 0.1s linear;
  will-change: transform;
}
.remote-cursor-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}
.remote-cursor-label {
  position: absolute;
  top: 14px;
  left: 8px;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  white-space: nowrap;
  color: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* ---- Modal overlay (bottom-sheet style) ---- */

/* ---- Tabs ---- */
.collab-tab {
  flex: 1;
  padding: 10px 12px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--text);
  font-weight: 600;
  font-size: 0.82rem;
  opacity: 0.5;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.collab-tab.active {
  background: var(--surface);
  border: 1px solid var(--border);
  opacity: 1;
}

/* ---- Form elements ---- */
.collab-input-group {
  margin-bottom: 16px;
}
.collab-input-group label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: 800;
  opacity: 0.5;
  margin-bottom: 6px;
  color: var(--text);
  letter-spacing: 0.08em;
}
.collab-input {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s;
}
.collab-input:focus {
  border-color: var(--primary);
}
.collab-input.code-input {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  letter-spacing: 4px;
  text-transform: uppercase;
}

/* ---- Buttons ---- */
.collab-btn {
  width: 100%;
  padding: 16px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}
.collab-btn:active {
  transform: scale(0.98);
}
.collab-btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 8px 20px rgba(0, 122, 255, 0.3);
}
.collab-btn-primary:hover:not(:disabled) {
  opacity: 0.9;
}
.collab-btn-secondary {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text);
}
.collab-btn-secondary:hover:not(:disabled) {
  background: rgba(0, 0, 0, 0.08);
}
.collab-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ---- Code display (big centered code for sharing) ---- */
.collab-code-display {
  text-align: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.03);
  border-radius: 12px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.collab-code-display .code-value {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 6px;
  color: var(--primary);
  user-select: all;
}
.collab-code-display .code-label {
  font-size: 0.72rem;
  opacity: 0.5;
  color: var(--text);
  margin-top: 8px;
}
.collab-copy-btn {
  margin-top: 10px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.collab-copy-btn:hover {
  background: rgba(0, 122, 255, 0.08);
}

/* ---- User list ---- */
.collab-user-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}
.collab-user-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  border: 1px solid var(--border);
}
.collab-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: white;
  flex-shrink: 0;
}
.collab-user-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
}
.collab-user-you {
  font-size: 0.7rem;
  opacity: 0.45;
  margin-left: auto;
}

/* ---- Sync status bar ---- */
.collab-sync-status {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.7rem;
  color: var(--text);
  opacity: 0.6;
}
.collab-sync-spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: collab-spin 0.8s linear infinite;
}
@keyframes collab-spin {
  to { transform: rotate(360deg); }
}

/* ---- Header button ---- */
.collab-header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s;
}
.collab-header-btn:hover {
  background: var(--surface-alt);
}
.collab-header-btn.connected {
  border-color: #2ecc71;
  color: #2ecc71;
}

/* ---- Group browser (teacher view) ---- */
.collab-group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}
.collab-group-card {
  padding: 14px;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.collab-group-card:hover {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.5);
}
.collab-group-card.active {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.collab-group-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
}
.collab-group-count {
  font-size: 0.7rem;
  color: var(--text);
  opacity: 0.5;
  margin-top: 4px;
}

/* ---- Mode toggle (create form) ---- */
.collab-mode-toggle {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}
.collab-mode-btn {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255,255,255,0.3);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}
.collab-mode-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.collab-mode-hint {
  font-size: 0.7rem;
  opacity: 0.5;
  color: var(--text);
}

/* ---- Dashboard code bar ---- */
.collab-dashboard-code-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(0, 122, 255, 0.06);
  border: 1px solid rgba(0, 122, 255, 0.15);
  border-radius: 10px;
  margin-bottom: 14px;
}
.collab-dashboard-code-label {
  font-size: 0.75rem;
  font-weight: 600;
  opacity: 0.5;
  color: var(--text);
}
.collab-dashboard-code-value {
  font-size: 1rem;
  font-family: monospace;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}
.collab-dashboard-code-copy {
  margin-left: auto;
  padding: 4px 12px;
  border: 1px solid var(--primary);
  border-radius: 8px;
  background: transparent;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  transition: background 0.15s;
}
.collab-dashboard-code-copy:hover {
  background: rgba(0, 122, 255, 0.08);
}

/* ---- Group picker (student) ---- */
.collab-group-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.collab-group-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.collab-group-item:hover {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.5);
}
.collab-group-item-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
}
.collab-group-item-count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
  opacity: 0.6;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 10px;
}
.collab-group-item-full {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
.collab-group-item-full .collab-group-item-count {
  background: rgba(255, 0, 0, 0.1);
  color: var(--danger);
  opacity: 1;
}

/* ---- Teacher dashboard ---- */
.collab-group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.collab-group-card {
  padding: 16px;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.collab-group-card:hover {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.5);
}
.collab-group-card.active {
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.collab-group-card-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.collab-group-card-code {
  font-size: 0.7rem;
  font-family: monospace;
  font-weight: 700;
  color: var(--primary);
  background: rgba(0, 122, 255, 0.08);
  padding: 2px 8px;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 6px;
  display: inline-block;
  transition: background 0.15s;
}
.collab-group-card-code:hover {
  background: rgba(0, 122, 255, 0.15);
}
.collab-group-card-count {
  font-size: 0.7rem;
  color: var(--text);
  opacity: 0.5;
}
.collab-group-card-thumb {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.03);
  margin-bottom: 8px;
  object-fit: contain;
}
.collab-group-card-full .collab-group-card-name {
  opacity: 0.4;
}
.collab-group-card-full .collab-group-card-count {
  color: var(--danger);
}

/* ---- Group name rows (create form) ---- */
.collab-group-name-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.collab-group-name-input {
  flex: 1;
}
.collab-add-group-btn {
  background: none;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  width: 100%;
  transition: background 0.15s;
}
.collab-add-group-btn:hover {
  background: rgba(0, 122, 255, 0.05);
}

/* ---- Mobile adjustments ---- */
.collab-turnstile-wrap {
  height: 0;
  overflow: hidden;
}
@media (max-width: 480px) {
  .collab-indicator { top: 40px; right: 12px; padding: 5px 10px; font-size: 11px; }
  .collab-modal { max-width: 100%; }
  .collab-modal-header { padding: 14px 20px; }
  .collab-modal-body { padding: 20px 20px 0; padding-bottom: calc(20px + env(safe-area-inset-bottom)); }
  .collab-code-display .code-value { font-size: 24px; letter-spacing: 4px; }
  .collab-group-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 8px; }
}

/* ---- Points / Collab choice popup ---- */
.pc-popup {
  position: fixed;
  top: 80px;
  right: 20px;
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px;
  z-index: 200;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  min-width: 170px;
}
.pc-popup-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  transition: background 0.15s;
}
.pc-popup-item:hover {
  background: var(--surface-alt);
}
.pc-popup-item .pm-icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

/* ---- Dashboard lock bar ---- */
.collab-dashboard-lock-bar {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.collab-lock-toggle {
  font-size: 0.78rem;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.collab-lock-status {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--primary, #007AFF);
  opacity: 0;
  transition: opacity 0.2s;
}
.collab-lock-status.visible {
  opacity: 1;
}
.collab-btn-active {
  background: var(--primary, #007AFF) !important;
  color: #fff !important;
  border-color: var(--primary, #007AFF) !important;
}