/* Reset and base styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --border-color: #e2e8f0;
  --border-color-dark: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --user-msg-bg: #eff6ff;
  --user-msg-border: #bfdbfe;
  --assistant-msg-bg: #ffffff;
  --assistant-msg-border: #e2e8f0;
  --status-bg: #f1f5f9;
  --accent-green: #16a34a;
  --accent-amber: #d97706;
  --accent-red: #dc2626;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
}

/* Split-screen layout */
.app-layout {
  display: flex;
  width: 100vw;
  height: 100vh;
}

/* Left Pane */
.left-pane {
  width: 460px;
  min-width: 360px;
  max-width: 600px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pane-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  background-color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.header-main {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.app-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  background-color: #f1f5f9;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.badge-label {
  font-weight: 600;
  color: var(--text-muted);
}

.badge-id {
  font-family: monospace;
  color: var(--text-main);
  max-width: 130px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-weight: 500;
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-main);
  border-color: var(--border-color-dark);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #f8fafc;
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.78rem;
}

.btn-xs {
  padding: 2px 6px;
  font-size: 0.7rem;
  background-color: #ffffff;
  border-color: var(--border-color);
}

/* Chat container */
.chat-container {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  background-color: #f8fafc;
}

.chat-messages {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  display: flex;
  flex-direction: column;
  max-width: 90%;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.875rem;
  line-height: 1.45;
  word-break: break-word;
}

.message-sender {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.message.user {
  align-self: flex-end;
  background-color: var(--user-msg-bg);
  border: 1px solid var(--user-msg-border);
}

.message.user .message-sender {
  color: var(--primary-color);
}

.message.assistant {
  align-self: flex-start;
  background-color: var(--assistant-msg-bg);
  border: 1px solid var(--assistant-msg-border);
}

.message.assistant .message-sender {
  color: var(--text-muted);
}

.message.error-message {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.message.error-message .message-sender {
  color: #b91c1c;
}

/* Status Box */
.status-box {
  margin: 0 16px 8px 16px;
  padding: 10px 12px;
  background-color: var(--status-bg);
  border: 1px solid var(--border-color-dark);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-shrink: 0;
}

.status-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-badge {
  font-family: monospace;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 6px;
  background-color: #0f172a;
  color: #ffffff;
  border-radius: 4px;
  text-transform: uppercase;
}

.status-message {
  font-size: 0.8rem;
  color: var(--text-main);
  flex: 1;
}

.progress-bar-container {
  height: 4px;
  background-color: #e2e8f0;
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background-color: var(--primary-color);
  transition: width 0.3s ease;
}

.diagnostics-panel {
  border-top: 1px solid var(--border-color);
  padding-top: 6px;
  font-size: 0.75rem;
}

.diagnostics-summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-muted);
}

.diagnostics-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
  max-height: 100px;
  overflow-y: auto;
}

.diagnostic-item {
  padding: 4px 6px;
  border-radius: 4px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  font-family: monospace;
}

.diagnostic-item.warning {
  border-left: 3px solid var(--accent-amber);
}

.diagnostic-item.error {
  border-left: 3px solid var(--accent-red);
}

.diagnostic-item.info {
  border-left: 3px solid var(--primary-color);
}

/* Chat Input Area */
.chat-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  background-color: #ffffff;
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.chat-textarea {
  flex: 1;
  font-family: inherit;
  font-size: 0.875rem;
  padding: 8px 10px;
  border: 1px solid var(--border-color-dark);
  border-radius: 6px;
  resize: none;
  min-height: 42px;
  max-height: 160px;
  outline: none;
  line-height: 1.4;
}

.chat-textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 1px var(--primary-color);
}

/* Right Pane: Canvas */
.right-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: #ffffff;
}

.canvas-toolbar {
  padding: 10px 18px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #ffffff;
  flex-shrink: 0;
}

.toolbar-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.toolbar-controls {
  display: flex;
  gap: 6px;
}

/* Modeler minimal editor: hide full creation palette */
.djs-palette {
  display: none !important;
}

#btn-save-diagram:not(:disabled) {
  background-color: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
}

#btn-save-diagram:not(:disabled):hover {
  background-color: var(--primary-hover);
}

.canvas-container {
  flex: 1;
  position: relative;
  background-color: #fafbfc;
  overflow: hidden;
}

.bpmn-canvas {
  width: 100%;
  height: 100%;
  cursor: grab;
  user-select: none;
}

.bpmn-canvas.grabbing,
.bpmn-canvas:active {
  cursor: grabbing;
}

.bpmn-canvas svg {
  cursor: grab;
}

.bpmn-canvas.grabbing svg,
.bpmn-canvas:active svg {
  cursor: grabbing;
}

.canvas-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #f8fafc;
  z-index: 5;
}

.placeholder-card {
  text-align: center;
  max-width: 380px;
  padding: 24px;
  border-radius: 8px;
  background-color: #ffffff;
  border: 1px solid var(--border-color);
}

.placeholder-card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.placeholder-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Helpers */
.hidden {
  display: none !important;
}