/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #202124;
  background: #f8f9fa;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: #fff;
  border-bottom: 1px solid #dadce0;
  flex-shrink: 0;
  z-index: 10;
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toolbar-title {
  font-size: 16px;
  font-weight: 600;
  color: #202124;
}

.suggestion-count {
  font-size: 13px;
  color: #5f6368;
  background: #e8eaed;
  padding: 2px 8px;
  border-radius: 10px;
  display: none;
}

.suggestion-count.visible {
  display: inline-block;
}

.toolbar-center {
  display: flex;
  align-items: center;
}

.toolbar-right {
  display: flex;
  gap: 8px;
  align-items: center;
}

.toolbar-separator {
  width: 1px;
  height: 20px;
  background: #dadce0;
  margin: 0 4px;
}

.toolbar-btn {
  padding: 6px 16px;
  border: 1px solid #dadce0;
  border-radius: 4px;
  background: #fff;
  color: #202124;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}

.toolbar-btn:hover:not(:disabled) {
  background: #f1f3f4;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.toolbar-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.btn-accept { color: #1e8e3e; border-color: #1e8e3e; }
.btn-accept:hover:not(:disabled) { background: #e6f4ea; }

.btn-reject { color: #c5221f; border-color: #c5221f; }
.btn-reject:hover:not(:disabled) { background: #fce8e6; }

.btn-suggestion { color: #1a73e8; border-color: #dadce0; }
.btn-suggestion.active {
  background: #e8f0fe;
  border-color: #1a73e8;
  color: #1a73e8;
  font-weight: 600;
}
.btn-suggestion:hover:not(:disabled) { background: #e8f0fe; }

/* Layout Toggle Group */
.layout-toggles {
  display: flex;
  border: 1px solid #dadce0;
  border-radius: 4px;
  overflow: hidden;
}

.layout-toggle {
  padding: 5px 14px;
  border: none;
  border-right: 1px solid #dadce0;
  background: #fff;
  color: #5f6368;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
}

.layout-toggle:last-child {
  border-right: none;
}

.layout-toggle:hover {
  background: #f1f3f4;
}

.layout-toggle.active {
  background: #e8f0fe;
  color: #1a73e8;
  font-weight: 600;
}

/* File Bar (compact, shown after loading content) */
.file-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 16px;
  background: #f1f3f4;
  border-bottom: 1px solid #dadce0;
  flex-shrink: 0;
  font-size: 13px;
  color: #5f6368;
}

.file-bar-name {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
  font-size: 12px;
}

.file-bar-actions {
  display: flex;
  gap: 6px;
}

.file-bar-btn {
  padding: 2px 10px;
  border: 1px solid #dadce0;
  border-radius: 3px;
  background: #fff;
  color: #5f6368;
  font-size: 12px;
  cursor: pointer;
}

.file-bar-btn:hover {
  background: #e8eaed;
}

/* Drop Zone */
.drop-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 40px;
}

.drop-zone.dragover {
  background: #e8f0fe;
}

.drop-zone-prompt {
  text-align: center;
  max-width: 500px;
  width: 100%;
}

.drop-zone-title {
  font-size: 20px;
  color: #202124;
  margin-bottom: 8px;
}

.drop-zone-subtitle {
  font-size: 14px;
  color: #5f6368;
  margin-bottom: 20px;
}

.input-textarea {
  width: 100%;
  min-height: 150px;
  padding: 12px;
  border: 1px solid #dadce0;
  border-radius: 8px;
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
  font-size: 13px;
  resize: vertical;
  color: #202124;
  line-height: 1.5;
}

.input-textarea:focus {
  outline: none;
  border-color: #1a73e8;
  box-shadow: 0 0 0 2px rgba(26,115,232,0.2);
}

.drop-zone-actions {
  margin-top: 16px;
  display: flex;
  gap: 8px;
  justify-content: center;
}

/* Split-Pane Main Layout */
.main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.pane {
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.editor-pane {
  flex: 1;
  min-width: 0;
  border-right: 1px solid #dadce0;
}

#editorContainer {
  flex: 1;
  overflow: hidden;
}

#editorContainer .cm-editor {
  height: 100%;
}

/* Fallback textarea editor (when CodeMirror can't load) */
.fallback-editor {
  width: 100%;
  height: 100%;
  padding: 20px 16px;
  border: none;
  resize: none;
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #202124;
  background: #fff;
  outline: none;
}

.preview-pane {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
}

/* Resize Handle */
.resize-handle {
  width: 5px;
  cursor: col-resize;
  background: #dadce0;
  flex-shrink: 0;
  transition: background 0.15s;
}

.resize-handle:hover,
.resize-handle.dragging {
  background: #1a73e8;
}

/* Layout Modes */
.layout-both .editor-pane { display: flex; }
.layout-both .preview-pane { display: flex; flex-direction: column; }
.layout-both .resize-handle { display: block; }

.layout-editor-only .editor-pane { display: flex; flex: 1; }
.layout-editor-only .preview-pane { display: none; }
.layout-editor-only .resize-handle { display: none; }
.layout-editor-only .comment-sidebar { display: none; }

.layout-preview-only .editor-pane { display: none; }
.layout-preview-only .preview-pane { display: flex; flex-direction: column; flex: 1; }
.layout-preview-only .resize-handle { display: none; }

/* Rendered View */
.rendered-view {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px;
  background: #fff;
  min-height: 100%;
  line-height: 1.7;
  font-size: 15px;
}

.rendered-view h1 { font-size: 28px; margin: 24px 0 16px; font-weight: 600; }
.rendered-view h2 { font-size: 22px; margin: 20px 0 12px; font-weight: 600; }
.rendered-view h3 { font-size: 18px; margin: 16px 0 10px; font-weight: 600; }
.rendered-view p { margin: 0 0 12px; }
.rendered-view ul, .rendered-view ol { margin: 0 0 12px; padding-left: 24px; }
.rendered-view blockquote { border-left: 3px solid #dadce0; padding-left: 16px; color: #5f6368; margin: 0 0 12px; }
.rendered-view code { background: #f1f3f4; padding: 2px 6px; border-radius: 3px; font-size: 13px; }
.rendered-view pre { background: #f1f3f4; padding: 16px; border-radius: 6px; overflow-x: auto; margin: 0 0 12px; }
.rendered-view pre code { background: none; padding: 0; }
.rendered-view a { color: #1a73e8; }
.rendered-view hr { border: none; border-top: 1px solid #dadce0; margin: 24px 0; }

/* CriticMarkup Styles */
.critic-addition {
  color: #1e8e3e;
  background-color: #e6f4ea;
  text-decoration: underline;
  text-decoration-color: #1e8e3e;
  padding: 1px 2px;
  border-radius: 2px;
  position: relative;
}

.critic-deletion {
  color: #c5221f;
  background-color: #fce8e6;
  text-decoration: line-through;
  text-decoration-color: #c5221f;
  padding: 1px 2px;
  border-radius: 2px;
  position: relative;
}

.critic-substitution {
  position: relative;
}

.critic-highlight {
  background-color: #fef7e0;
  border-bottom: 2px solid #f9ab00;
  padding: 1px 2px;
  border-radius: 2px;
  position: relative;
}

.critic-comment-marker {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: #f9ab00;
  border-radius: 50%;
  vertical-align: super;
  cursor: pointer;
  position: relative;
}

/* Accept/Reject Controls */
.critic-controls {
  display: none;
  position: absolute;
  top: -28px;
  right: 0;
  background: #fff;
  border: 1px solid #dadce0;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  padding: 2px;
  white-space: nowrap;
  z-index: 5;
}

.critic-addition:hover > .critic-controls,
.critic-deletion:hover > .critic-controls,
.critic-substitution:hover > .critic-controls,
.critic-highlight:hover > .critic-controls,
.critic-comment-marker:hover > .critic-controls {
  display: flex;
}

.critic-accept,
.critic-reject {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 3px;
  line-height: 1;
}

.critic-accept { color: #1e8e3e; }
.critic-accept:hover { background: #e6f4ea; }

.critic-reject { color: #c5221f; }
.critic-reject:hover { background: #fce8e6; }

/* Comment Sidebar */
.comment-sidebar {
  width: 280px;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 16px 12px;
  position: relative;
  border-left: 1px solid #dadce0;
  background: #f8f9fa;
}

.comment-sidebar:empty {
  display: none;
}

.comment-card {
  background: #fff;
  border-left: 3px solid #f9ab00;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: #3c4043;
  position: absolute;
  width: calc(100% - 24px);
  transition: box-shadow 0.15s;
}

.comment-card:hover,
.comment-card.highlight {
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.comment-card .comment-actions {
  margin-top: 6px;
  text-align: right;
}

.comment-resolve {
  border: none;
  background: none;
  color: #5f6368;
  cursor: pointer;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 3px;
}

.comment-resolve:hover {
  background: #fce8e6;
  color: #c5221f;
}

/* Responsive */
@media (max-width: 768px) {
  .comment-sidebar { display: none; }

  .toolbar {
    flex-wrap: wrap;
    gap: 8px;
  }

  .toolbar-right {
    flex-wrap: wrap;
  }

  .rendered-view {
    padding: 20px;
  }

  .layout-toggles {
    display: none;
  }

  /* Force preview-only on mobile */
  .main-layout .editor-pane { display: none; }
  .main-layout .resize-handle { display: none; }
  .main-layout .preview-pane { display: flex; flex-direction: column; flex: 1; }
}