* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #6366f1;
  --secondary-color: #8b5cf6;
  --background-dark: #0f172a;
  --background-light: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --border-color: #334155;
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background-color: var(--background-dark);
  color: var(--text-primary);
  overflow: hidden;
}

.container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--background-light);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-left h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.status-indicator {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #fbbf24;
  animation: pulse 2s infinite;
}

.status-indicator.connected {
  background-color: var(--success-color);
  animation: none;
}

.status-indicator.disconnected {
  background-color: var(--error-color);
  animation: none;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.header-right {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.room-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  background-color: var(--background-dark);
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
}

.room-info code {
  font-family: 'Monaco', 'Courier New', monospace;
  font-size: 0.875rem;
  color: var(--primary-color);
  font-weight: 600;
}

/* Buttons */
.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-secondary {
  background-color: var(--primary-color);
  color: white;
}

.btn-secondary:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-small {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  background-color: var(--background-dark);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-small:hover {
  background-color: var(--border-color);
  border-color: var(--primary-color);
}

/* Content Area */
.content {
  display: flex;
  flex: 1;
  overflow: hidden;
  gap: 0;
}

/* Panels */
.panel {
  display: flex;
  flex-direction: column;
  background-color: var(--background-light);
  border-right: 1px solid var(--border-color);
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  background-color: rgba(0, 0, 0, 0.2);
}

.panel-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.diagram-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.zoom-level {
  font-size: 0.75rem;
  color: var(--text-secondary);
  min-width: 50px;
  text-align: right;
}

/* Editor Panel */
.editor-panel {
  flex: 1;
  min-width: 300px;
}

.editor-container {
  flex: 1;
  overflow: hidden;
}

.CodeMirror {
  height: 100% !important;
  font-family: 'Monaco', 'Courier New', monospace !important;
  font-size: 14px !important;
  background-color: var(--background-dark) !important;
  color: var(--text-primary) !important;
}

.CodeMirror-gutters {
  background-color: var(--background-light) !important;
  border-right: 1px solid var(--border-color) !important;
}

.CodeMirror-linenumber {
  color: var(--text-secondary) !important;
}

.CodeMirror-cursor {
  border-left-color: var(--primary-color) !important;
}

/* Diagram Panel */
.diagram-panel {
  flex: 1;
  min-width: 300px;
  border-right: none;
}

.diagram-container {
  flex: 1;
  overflow: hidden;
  position: relative;
  background-color: var(--background-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

#mermaidDiagram {
  max-width: 100%;
  max-height: 100%;
  cursor: grab;
}

#mermaidDiagram:active {
  cursor: grabbing;
}

.error-message {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  padding: 1rem;
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--error-color);
  border-radius: 0.375rem;
  color: #fca5a5;
  font-size: 0.875rem;
  max-height: 150px;
  overflow-y: auto;
  display: none;
}

.error-message.show {
  display: block;
}

/* Resizer */
.resizer {
  width: 4px;
  background-color: var(--border-color);
  cursor: col-resize;
  transition: background-color 0.2s ease;
  flex-shrink: 0;
}

.resizer:hover {
  background-color: var(--primary-color);
}

.resizer.active {
  background-color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  .content {
    flex-direction: column;
  }

  .resizer {
    width: 100%;
    height: 4px;
    cursor: row-resize;
  }

  .editor-panel,
  .diagram-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .diagram-panel {
    border-bottom: none;
  }

  .header {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }

  .header-right {
    width: 100%;
    justify-content: space-between;
  }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--background-light);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}