/* ==========================================================================
   Personal Workspace OS — Master OS Layout & Shell
   ========================================================================== */

/* OS Top Menu Bar */
header.os-header {
  height: 48px;
  background: #0f141c;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  user-select: none;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.os-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: -0.3px;
  color: #ffffff;
}

.os-logo-badge {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  box-shadow: 0 0 14px rgba(59, 130, 246, 0.35);
}

.workspace-selector-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.workspace-selector-pill:hover {
  background: var(--bg-surface);
  border-color: var(--accent-primary);
}

.os-omnibox {
  flex: 1;
  max-width: 520px;
  margin: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 14px;
  border-radius: 8px;
  background: #080b10;
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.os-omnibox:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.os-header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.device-presence-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 9999px;
  background: rgba(59, 130, 246, 0.12);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.25);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.cloud-metrics-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
}

/* Mode Switcher Nav Bar */
.mode-nav-bar {
  height: 40px;
  background: #121722;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  user-select: none;
}

.mode-pills-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.mode-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.mode-pill.active {
  color: #ffffff;
  background: var(--accent-primary);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
}

/* Master Workspace Viewport Container */
.os-workspace-viewport {
  flex: 1;
  display: flex;
  overflow: hidden;
  background: var(--bg-app);
  position: relative;
}

/* Unified Matrix Layout Grid (Browser + IDE + Terminal + Agent) */
.matrix-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1.3fr 1fr;
  gap: 6px;
  padding: 6px;
  background: #080b10;
  overflow: hidden;
}

.matrix-tile {
  background: var(--bg-secondary);
  border: 1px solid var(--border-default);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.matrix-tile-header {
  height: 34px;
  background: #141a24;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
  user-select: none;
}

/* Handoff Continuity Banner */
.handoff-banner {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.15), rgba(139, 92, 246, 0.15));
  border-bottom: 1px solid rgba(59, 130, 246, 0.3);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: #e0e7ff;
}

.btn-handoff {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 4px 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 11px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-handoff:hover {
  background: var(--accent-hover);
}