atom/static/editor.css

.editor {
  height: 100%;
  overflow: hidden;
  background: #333;
  color: white;
  cursor: default;
  -webkit-user-select: none;
  -webkit-box-flex: 1;
  position: relative;
}

.editor.mini {
  height: auto;
}

.editor .flexbox {
  display: -webkit-box;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}

.editor .gutter {
  height: 100%;
  overflow: hidden;
  padding-left: 0.4em;
  padding-right: 0.8em;
  color: rgba(255, 255, 255, .3);
  text-align: right;
}

.editor .gutter .line-numbers {
  position: relative;
}

.editor.mini .gutter {
  display: none;
}

.editor .gutter.drop-shadow {
  -webkit-box-shadow: -2px 0px 10px 2px #222;
}

.editor .vertical-scrollbar {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 10px;
  overflow-y: auto;
}

.editor .scroll-view {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-box-flex: 1;
}

.editor.mini .scroll-view {
  overflow: hidden;
}

.editor.soft-wrap .scroll-view {
  overflow-x: hidden;
}

.editor .lines {
  position: relative;
  display: table;
  height: 100%;
  width: 100%;
}

.editor .line {
  white-space: pre;
  margin: 0;
  padding: 0;
  z-index: 1;
}

@-webkit-keyframes blink {
  0% { opacity: .7; }
  60% { opacity: .7; }
  61% { opacity: 0; }
  100% { opacity: 0; }
}

.editor .cursor {
  position: absolute;
  border-left: 3px solid rgba(255, 255, 255, .4);
  opacity: 0.7;
}

.editor.focused .cursor {
  border-color: #9dff9d;
}

.editor.focused .cursor.idle {
  -webkit-animation: blink 0.8s;
  -webkit-animation-iteration-count: infinite;
}

.editor .hidden-input {
  position: fixed;
  z-index: -1;
  top: 0;
  left: 0;
  opacity: 0;
}

.editor .selection {
  position: absolute;
  background: white;
  opacity: .25;
  pointer-events: none;
}