src/index.css

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 2px !important; /* Specification: Extremely-less-curved edges */
}

:root {
  --bg-color: #f7f7f7;
  --bg-panel: #ffffff;
  --text-primary: #111111;
  --text-secondary: #666666;
  --border-color: #eeeeee;
  --accent-color: #2e6ff2;
  --font-ibm-plex: 'IBM Plex Mono', monospace;
  --font-claude-sans: 'Inter', system-ui, sans-serif;
  --font-wix-display: 'Wix Madefor Display', sans-serif;
  --font-courier-new: 'Courier New', Courier, monospace;
  
  --radius-sm: 2px;
  --radius-md: 2px;
  
  --bg-opacity: 0.15;
  --fg-opacity: 1;
  
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

html, body {
  height: 100%;
  width: 100%;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-ibm-plex);
  overflow: hidden; /* App takes full screen */
}

/* Typography Classes */
.font-ibm-plex-mono { font-family: var(--font-ibm-plex); }
.font-claudesans { font-family: var(--font-claude-sans); }
.font-wixmadefordisplay { font-family: var(--font-wix-display); }
.font-couriernew { font-family: var(--font-courier-new); }

/* Layout Shell */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  position: relative;
  overflow: hidden;
}

.app-background {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-size: cover;
  background-position: center;
  z-index: -1;
  opacity: var(--bg-opacity);
}

.mini-sidebar {
  width: 48px;
  background-color: var(--bg-panel);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 0;
  gap: 16px;
  z-index: 10;
}

.sidebar-panel {
  width: 260px;
  background-color: rgba(255, 255, 255, 0.85); /* Glassmorphism leaning */
  backdrop-filter: blur(10px);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 10;
  transition: width 0.3s ease;
}

.sidebar-header {
  height: 48px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  font-weight: 500;
  font-size: 14px;
}

.editor-main {
  flex: 1;
  background-color: transparent;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-secondary);
}

/* Reusable buttons component logic will be added here */
button {
  all: unset;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition-smooth);
}

/* Tree View Styling UPDATED */
.tree-view {
  padding-bottom: 20px;
}

.tree-children {
  position: relative;
  transition: all 0.3s ease;
}

/* Vertical line for the branch refine */
.tree-children::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 1px;
  background-color: rgba(0,0,0,0.03);
}

.tree-item-wrapper {
  position: relative;
}

.tree-item {
  transition: background-color 0.15s ease, border-left 0.1s ease;
}

.tree-item:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.tree-item:hover .more-btn {
  opacity: 0.6 !important;
}

.tree-item .more-btn:hover {
  opacity: 1 !important;
  background-color: rgba(0, 0, 0, 0.05);
}

.tree-item.active {
  background-color: rgba(0, 0, 0, 0.04) !important;
  font-weight: 500;
}

.btn-icon-sm {
  all: unset;
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  color: var(--text-secondary);
  opacity: 0.6;
}

.btn-icon-sm:hover {
  background-color: rgba(0, 0, 0, 0.05);
  opacity: 1;
  color: var(--text-primary);
}

.context-menu button {
  all: unset;
  cursor: pointer;
  font-family: var(--font-ibm-plex);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.spin {
  animation: spin 1s linear infinite;
}

.pixilize {
  filter: blur(5px) grayscale(0.5);
  transition: filter 0.3s ease;
  user-select: none;
}
.pixilize:hover {
  filter: none;
}

.ContentEditable {
  flex: 1;
  outline: none;
  padding: 0px 24px 100px 24px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  tab-size: 4;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: break-word;
}

.editor-paragraph {
  margin: 0;
  position: relative;
}

.comment-bubble {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 8px 12px;
  font-size: 11px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  margin-bottom: 8px;
  color: var(--text-primary);
  max-width: 250px;
  line-height: 1.4;
}

.comment-toggle {
  opacity: 0.1;
  transition: opacity 0.2s ease;
}
.tree-item-wrapper:hover .comment-toggle,
.line-numbers-container:hover .comment-toggle,
.comment-toggle.active {
  opacity: 1;
}

.editor-text-bold { font-weight: bold; }
.editor-text-italic { font-style: italic; }
.editor-text-strikethrough { text-decoration: line-through; }
.editor-text-underline { text-decoration: underline; }

@keyframes fadeInSlide {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}