html,
body {
  height: 100%;
  margin: 0;
  font-family: sans-serif;
}

* {
  box-sizing: border-box;
}

.parent {
  height: 100vh;
  width: 100vw;
  padding: 1rem;
  display: flex;
  flex-direction: row;
  gap: 1rem;
}
.parent .left-panel {
  max-width: 20rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.parent .left-panel .node {
  flex-grow: 1;
}
.parent .left-panel .footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.parent .left-panel .footer button {
  padding: 0.5rem;
}
.parent .code {
  flex-grow: 4;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.parent .code .filename {
  font-family: monospace;
}
.parent .code textarea {
  flex-grow: 1;
  resize: none;
}

.under {
  flex-grow: 1;
  max-height: 20vh;
}

.node {
  user-select: none;
  border: 1px;
}
.node.folder {
  margin-top: 0.1rem;
  color: blue;
}
.node.file {
  color: red;
}
.node.collapsed .children {
  pointer-events: none;
  display: none;
}
.node .children {
  margin-left: 1rem;
}
.node.selected .title {
  font-weight: bold;
}
.node .title {
  display: flex;
  z-index: 5;
  padding-top: 0.1rem;
  padding-bottom: 0.1rem;
}
.node .title .text {
  flex-grow: 1;
}
.node .title .actions {
  display: flex;
  gap: 0.25rem;
}