*, *:before, *:after {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-size: 100%;
}

.inspector {
  margin-left: 400px;

  pre {
    font-family: Menlo;
    font-size: 13px;
  }
}

.f-no-select {
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.m-tree {
  position: relative;
  overflow: hidden;
  .f-no-select;
}

.m-draggable {
  position: absolute;
  opacity: 0.8;
  .f-no-select;
}

.m-node {
  &.placeholder > * {
    visibility: hidden;
  }

  &.placeholder {
    border: 1px dashed #ccc;
  }

  .inner {
    position: relative;
    cursor: pointer;
    padding-left: 10px;
  }

  .collapse {
    position: absolute;
    left: 0;
    cursor: pointer;
  }

  .caret-right:before {
    content: '\25B8';
  }

  .caret-down:before {
    content: '\25BE';
  }
}