/* App layout - minimal CSS, most styling via Tailwind */
.app-shell {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px var(--border-primary);
}

.app {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.app__sidebar {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.app__sidebar > * {
  flex: 1;
}

.app__note-list {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}

.app__note-list > * {
  flex: 1;
}

.app__editor {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.app__editor > * {
  flex: 1;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes tab-status-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.tab-status-pulse {
  animation: tab-status-pulse 1.2s ease-in-out infinite;
}

/* AI highlight animation — applied by useAiActivity when MCP calls ui_highlight */
@keyframes ai-highlight-glow {
  0% { box-shadow: inset 0 0 0 2px rgba(99, 102, 241, 0.8); }
  50% { box-shadow: inset 0 0 8px 2px rgba(99, 102, 241, 0.4); }
  100% { box-shadow: inset 0 0 0 2px rgba(99, 102, 241, 0); }
}

.ai-highlight {
  animation: ai-highlight-glow 0.8s ease-out;
}