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

:root {
  --bg-primary: #1a1a1a;
  --bg-secondary: #252525;
  --bg-tertiary: #333;
  --border: #444;
  --text-primary: #e0e0e0;
  --text-secondary: #888;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
}

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

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  -webkit-app-region: drag;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  -webkit-app-region: no-drag;
}

.header select,
.header button {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 13px;
}

.header button:hover {
  background: var(--border);
}

.phase-indicator {
  display: flex;
  gap: 4px;
}

.phase-step {
  padding: 4px 12px;
  font-size: 12px;
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}

.phase-step.active {
  background: var(--accent);
  color: white;
}

.phase-step.complete {
  background: var(--success);
  color: white;
}

/* Main Content */
.main-content {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* Document Pane */
.document-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
}

.document-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
}

.document-header button {
  padding: 4px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 12px;
}

.document-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

.document-content.editing {
  font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
  font-size: 14px;
  line-height: 1.6;
  background: var(--bg-primary);
  border: none;
  resize: none;
  color: var(--text-primary);
}

.document-content.rendered {
  line-height: 1.7;
}

.document-content.rendered h1 {
  font-size: 28px;
  margin: 24px 0 16px;
}
.document-content.rendered h2 {
  font-size: 22px;
  margin: 20px 0 12px;
  color: var(--text-secondary);
}
.document-content.rendered h3 {
  font-size: 18px;
  margin: 16px 0 8px;
}
.document-content.rendered p {
  margin: 8px 0;
}
.document-content.rendered code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}
.document-content.rendered pre {
  background: var(--bg-tertiary);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
}
.document-content.rendered pre code {
  background: none;
  padding: 0;
}
.document-content.rendered li {
  margin-left: 24px;
  margin-bottom: 4px;
}
.document-content.rendered li.task {
  list-style: none;
  margin-left: 0;
}
.document-content.rendered li.task.done {
  color: var(--success);
}
.document-content.rendered mark.review {
  background: var(--warning);
  color: black;
  padding: 2px 4px;
  border-radius: 2px;
}
.document-content.rendered mark.note {
  background: var(--accent);
  color: white;
  padding: 2px 4px;
  border-radius: 2px;
}
.document-content.rendered .empty {
  color: var(--text-secondary);
  font-style: italic;
}

.badge {
  background: var(--accent);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
}

/* Chat Pane */
.chat-pane {
  width: 380px;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.message {
  margin-bottom: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  max-width: 90%;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.message.user {
  background: var(--accent);
  margin-left: auto;
}

.message.assistant {
  background: var(--bg-tertiary);
}

.message.loading {
  color: var(--text-secondary);
  font-style: italic;
}

.chat-input {
  display: flex;
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--border);
}

.chat-input input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
}

.chat-input input:focus {
  outline: none;
  border-color: var(--accent);
}

.chat-input button {
  padding: 10px 16px;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: white;
  cursor: pointer;
  font-size: 14px;
}

.chat-input button:hover:not(:disabled) {
  background: var(--accent-hover);
}

.chat-input button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Action Bar */
.action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.action-bar-left,
.action-bar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.token-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
}

.token-bar {
  width: 100px;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  overflow: hidden;
}

.token-fill {
  height: 100%;
  transition: width 0.3s ease;
}

.token-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.permission-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  cursor: pointer;
}

.permission-toggle input {
  cursor: pointer;
}

.btn-secondary {
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 14px;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--border);
}

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

.btn-primary {
  padding: 8px 20px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: white;
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
}

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

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

.implementing-status {
  color: var(--success);
  font-size: 14px;
}

/* Error Bar */
.error-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: var(--danger);
  color: white;
  font-size: 14px;
}

.error-bar button {
  background: none;
  border: none;
  color: white;
  font-size: 18px;
  cursor: pointer;
  padding: 0 4px;
}

.error-bar button:hover {
  opacity: 0.8;
}

/* Onboarding */
.onboarding h1 {
  font-size: 32px;
  margin-bottom: 8px;
}

.onboarding h2 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--accent);
}

.onboarding p {
  margin: 12px 0;
  line-height: 1.6;
}

.onboarding ol {
  margin: 12px 0 12px 24px;
}

.onboarding li {
  margin: 8px 0;
  line-height: 1.5;
}

.onboarding pre {
  background: var(--bg-tertiary);
  padding: 12px 16px;
  border-radius: 6px;
  margin: 12px 0;
}

.onboarding code {
  font-family: "SF Mono", Monaco, monospace;
  font-size: 13px;
}

.onboarding a {
  color: var(--accent);
  text-decoration: none;
}

.onboarding a:hover {
  text-decoration: underline;
}

.onboarding-tip {
  margin-top: 28px;
  padding: 16px;
  background: var(--bg-tertiary);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
}