/* ==========================================================================
   Alchementary Link — Tab Bar & Tabs
   Compact session tabs with status indicators, protocol badges, and
   close / pin controls.
   ========================================================================== */

/* -----------------------------------------------------------------------
   Individual tab
   ----------------------------------------------------------------------- */
.tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: var(--tab-bar-height);
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  flex-shrink: 0;
  border-right: 1px solid var(--border-subtle);
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  user-select: none;
  max-width: 200px;
  min-width: 0;
}

.tab:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Active tab */
.tab.tab-active {
  background: var(--bg-active);
  color: var(--text-primary);
}

/* Active indicator — accent bar at the bottom */
.tab.tab-active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full) var(--radius-full) 0 0;
}

/* -----------------------------------------------------------------------
   Tab icon (small terminal/protocol icon)
   ----------------------------------------------------------------------- */
.tab-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-tertiary);
}

.tab.tab-active .tab-icon {
  color: var(--text-secondary);
}

/* -----------------------------------------------------------------------
   Tab label
   ----------------------------------------------------------------------- */
.tab-label,
.tab-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  flex: 1;
}

/* -----------------------------------------------------------------------
   Protocol mini-badge inside tab
   ----------------------------------------------------------------------- */
.tab-badge {
  display: inline-flex;
  align-items: center;
  height: 14px;
  padding: 0 3px;
  font-size: 9px;
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 2px;
  flex-shrink: 0;
  line-height: 1;
}

.tab-badge.badge-ssh {
  background: rgba(78, 205, 196, 0.15);
  color: var(--protocol-ssh);
}
.tab-badge.badge-telnet {
  background: rgba(255, 167, 38, 0.15);
  color: var(--protocol-telnet);
}
.tab-badge.badge-raw {
  background: rgba(171, 71, 188, 0.15);
  color: var(--protocol-raw);
}
.tab-badge.badge-github {
  background: rgba(124, 138, 255, 0.15);
  color: var(--protocol-github);
}
.tab-badge.badge-vnc {
  background: rgba(232, 93, 74, 0.15);
  color: var(--protocol-vnc);
}
.tab-badge.badge-irc {
  background: rgba(216, 178, 76, 0.15);
  color: var(--protocol-irc);
}
.tab-badge.badge-local {
  background: rgba(139, 195, 74, 0.15);
  color: var(--protocol-local);
}

/* -----------------------------------------------------------------------
   Status dot (connection state)
   ----------------------------------------------------------------------- */
.tab-status {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--text-tertiary);
}

.tab-status.is-connected {
  background: var(--success);
}
.tab-status.is-connecting {
  background: var(--warning);
  animation: pulse-dot 1.2s ease infinite;
}
.tab-status.is-reconnecting {
  background: var(--warning);
  animation: pulse-dot 0.8s ease infinite;
}
.tab-status.is-error {
  background: var(--error);
}
.tab-status.is-disconnected {
  background: var(--text-tertiary);
}

/* Also match the status-* pattern used by updateSessionState */
.tab-status.status-connected {
  background: var(--success);
}
.tab-status.status-connecting {
  background: var(--warning);
  animation: pulse-dot 1.2s ease infinite;
}
.tab-status.status-reconnecting {
  background: var(--warning);
  animation: pulse-dot 0.8s ease infinite;
}
.tab-status.status-error {
  background: var(--error);
}
.tab-status.status-disconnected {
  background: var(--text-tertiary);
}

/* -----------------------------------------------------------------------
   Activity indicator — pulses when background tab has new output
   ----------------------------------------------------------------------- */
.tab-activity {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--accent);
  opacity: 0;
  transition: opacity 150ms ease;
}

.tab-has-activity .tab-activity {
  opacity: 1;
  animation: pulse-dot 1.5s ease infinite;
}

.tab-active .tab-activity {
  opacity: 0;
}

/* Trigger flash — brief glow when a trigger rule matches */
.tab-trigger-flash {
  animation: trigger-flash 2s ease;
}

@keyframes trigger-flash {
  0%,
  100% {
    background: var(--bg-hover);
  }
  15% {
    background: rgba(239, 83, 80, 0.25);
  }
  30% {
    background: var(--bg-hover);
  }
  45% {
    background: rgba(239, 83, 80, 0.15);
  }
}

/* -----------------------------------------------------------------------
   SFTP toggle button — revealed on hover (SSH tabs only)
   ----------------------------------------------------------------------- */
.tab-sftp {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 10px;
  color: var(--text-tertiary);
  flex-shrink: 0;
  opacity: 0;
  transition:
    opacity var(--transition-fast),
    background var(--transition-fast),
    color var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  margin-left: auto;
}

.tab:hover .tab-sftp,
.tab.tab-active .tab-sftp {
  opacity: 1;
}

.tab-sftp:hover {
  background: var(--bg-active);
  color: var(--accent);
}

/* -----------------------------------------------------------------------
   Close button — revealed on hover
   ----------------------------------------------------------------------- */
.tab-close {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: var(--text-tertiary);
  flex-shrink: 0;
  opacity: 0;
  transition:
    opacity var(--transition-fast),
    background var(--transition-fast),
    color var(--transition-fast);
  cursor: pointer;
  margin: 0 2px 0 0;
  padding: 0;
  border: 0;
  background: none;
  line-height: 1;
}

.tab:hover .tab-close,
.tab.tab-active .tab-close {
  opacity: 1;
}

.tab-close:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

/* -----------------------------------------------------------------------
   Pin indicator
   ----------------------------------------------------------------------- */
.tab-pin {
  width: 12px;
  height: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  color: var(--text-disabled);
  flex-shrink: 0;
}

.tab.is-pinned .tab-pin {
  color: var(--accent);
}

/* Pinned tabs are always narrow */
.tab.is-pinned {
  max-width: 100px;
  padding: 0 var(--space-2);
}

.tab.is-pinned .tab-label {
  /* Hide label on pinned tabs to save space */
  display: none;
}

.tab.is-pinned .tab-close {
  /* Pinned tabs don't show close by default */
  display: none;
}

/* -----------------------------------------------------------------------
   Drag handle area (for tab reordering)
   ----------------------------------------------------------------------- */
.tab-drag-handle {
  cursor: grab;
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  height: 100%;
}

.tab-drag-handle:active {
  cursor: grabbing;
}

/* Drag ghost styling */
.tab.is-dragging {
  opacity: 0.5;
}

.tab.is-drag-over-left::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
}

.tab.is-drag-over-right::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
  /* Note: this re-uses ::after — active tab indicator is overridden while dragging */
}

/* -----------------------------------------------------------------------
   New-tab button (+)
   ----------------------------------------------------------------------- */
.tab-new {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--tab-bar-height);
  height: var(--tab-bar-height);
  font-size: var(--text-lg);
  color: var(--text-tertiary);
  cursor: pointer;
  flex-shrink: 0;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  border: none;
  background: none;
}

.tab-new:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.tab-new:active {
  background: var(--bg-active);
}

/* -----------------------------------------------------------------------
   Broadcast toggle button
   ----------------------------------------------------------------------- */
.tab-broadcast {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--tab-bar-height);
  height: var(--tab-bar-height);
  color: var(--text-tertiary);
  cursor: pointer;
  flex-shrink: 0;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
  border: none;
  background: none;
  opacity: 0.5;
}

.tab-broadcast:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  opacity: 0.8;
}

.tab-broadcast.is-active {
  color: var(--error);
  opacity: 1;
  animation: pulse-dot 1.5s ease infinite;
}

/* -----------------------------------------------------------------------
   Tab overflow indicators (chevrons at edges)
   ----------------------------------------------------------------------- */
.tab-bar-overflow-left,
.tab-bar-overflow-right {
  display: none;
  align-items: center;
  justify-content: center;
  width: 20px;
  flex-shrink: 0;
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  cursor: pointer;
  background: linear-gradient(90deg, var(--bg-surface), transparent);
}

.tab-bar-overflow-right {
  background: linear-gradient(-90deg, var(--bg-surface), transparent);
}

.tab-bar.has-overflow-left .tab-bar-overflow-left,
.tab-bar.has-overflow-right .tab-bar-overflow-right {
  display: flex;
}

/* -----------------------------------------------------------------------
   Tab context menu trigger (on right-click)
   ----------------------------------------------------------------------- */
.tab-context-area {
  position: absolute;
  inset: 0;
  z-index: 1;
  /* Transparent hit area for right-click context menu */
}

/* -----------------------------------------------------------------------
   Tab hover tooltip
   ----------------------------------------------------------------------- */
.tab-tooltip {
  max-width: 360px;
  white-space: normal;
}

.tab-tooltip-title {
  max-width: 320px;
  overflow: hidden;
  color: var(--text-primary);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tab-tooltip-meta {
  margin-top: 2px;
  color: var(--text-tertiary);
  font-weight: var(--weight-normal);
}

/* -----------------------------------------------------------------------
   Modified indicator (unsaved changes)
   ----------------------------------------------------------------------- */
.tab.is-modified .tab-close::before {
  content: "●";
  font-size: 8px;
  color: var(--accent);
}