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

.container {
  background-color: #ffffff;
}

.header {
  display: flex;
  padding: 10px;
  height: 56px;
  /* background: #2e2e2e; */
  border-bottom: 2px #ccc solid;
  color: #343a40
}

.content {
  display: flex;
  height: calc(100vh - 56px);
  overflow-y: hidden;
}

.tree {
  padding: 1rem;
  overflow-y: auto;
}

.source textarea {
  width: 100%;
  height: calc(100vh - 56px);
  padding: 1.3rem 0.4rem;
  border: none;
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: auto;
  tab-size: 4;
  -moz-tab-size: 4;
  -o-tab-size: 4;
  -webkit-tab-size: 4;
  outline: none;
}

.source textarea::selection {
  background-color: rgba(103, 134, 221, 0.6);
}

.source-controls {
  display: flex;
  flex-direction: row-reverse;
  position: absolute;
  right: 17px;
  top: 56px;
  padding: 5px;
}

.source-controls .btn:not(:first-child) {
  margin-right: 5px;
}

.source-controls-more {
  display: flex;
  visibility: hidden;
  flex-direction: column;
  position: absolute;
  right: 17px;
  top: 91px;
  padding: 5px;
}

.source-controls .btn,
.source-controls-more .btn {
  background: #1f2020a6;
}

.gutter.gutter-horizontal {
  border-left: 2px solid #ccc;
  float: left;
  cursor: ew-resize;
}

.btn {
  display: flex;
  align-items: center;
  border: none;
  color: #ffffff;
  fill: #ffffff;
  background-color: #1f2020a6;
  padding: 7px 11px;
  cursor: pointer;
  outline: none;
  transition: background-color 0.2s;
}

.btn.check {
  fill: #97fa55;
  color: #97fa55;
}

.btn svg:not(:last-child) {
  margin-right: 5px;
}

.btn:hover {
  background-color: #5d5f5fa6;
}