My personal Atom style overrides

styles.less

 .tree-view .icon-file-directory {
   font-weight: bold;
 }
.editor .line,
.editor .line-number {
  line-height: 1.5;
}
.editor .invisible-character,
.editor .indent-guide {
  color: rgba(192,197,206,0.15);
}
.editor .gutter {
  transition: box-shadow 250ms;
}
.editor .gutter.drop-shadow {
  box-shadow: 2px 0 10px rgba(0,0,0,0.25);
}
.editor .cursor, .editor.is-focused .cursor.blink-off {
  border-color: transparent;
  transition: border-color 250ms;
  visibility: visible;
}