:root {
  color-scheme: dark;
  --bg: #111318;
  --panel: #171b22;
  --panel-2: #1e242d;
  --line: #303844;
  --text: #e7ebf0;
  --muted: #99a4b3;
  --accent: #5cc8a1;
  --accent-2: #e6b450;
  --danger: #e06c75;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #232a34;
  color: var(--text);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
}

button:disabled {
  cursor: default;
  opacity: 0.5;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  height: 100vh;
  min-height: 540px;
}

.sidebar {
  min-width: 0;
  border-right: 1px solid var(--line);
  background: var(--panel);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  height: 64px;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.app-title {
  font-size: 15px;
  font-weight: 700;
}

.workspace-label {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.icon-button {
  width: 32px;
  padding: 0;
  font-size: 17px;
}

.file-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.file-tree {
  overflow: auto;
  padding: 8px;
  font-size: 13px;
}

.tree-row {
  min-height: 28px;
  padding: 4px 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  cursor: pointer;
}

.tree-row:hover,
.tree-row.active {
  background: var(--panel-2);
}

.tree-row.active {
  color: var(--accent);
}

.tree-children {
  margin-left: 16px;
  border-left: 1px solid #27303b;
}

.tree-icon {
  width: 14px;
  text-align: center;
  color: var(--muted);
  flex: 0 0 auto;
}

.tree-name {
  overflow: hidden;
  text-overflow: ellipsis;
}

.empty-tree {
  color: var(--muted);
  padding: 12px 6px;
}

.main {
  min-width: 0;
  display: grid;
  grid-template-rows: minmax(280px, 1fr) minmax(180px, 34vh);
}

.editor-area,
.terminal-area {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.editor-toolbar,
.terminal-toolbar {
  height: 38px;
  flex: 0 0 auto;
  padding: 0 12px;
  border-bottom: 1px solid var(--line);
  background: #151920;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.terminal-toolbar {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.file-path {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
}

.toolbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.save-status,
.terminal-state {
  color: var(--muted);
  font-size: 12px;
}

.save-status.dirty {
  color: var(--accent-2);
}

.save-status.error,
.terminal-state.error {
  color: var(--danger);
}

.save-status.saved,
.terminal-state.ready {
  color: var(--accent);
}

.CodeMirror {
  flex: 1 1 auto;
  height: 100%;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.5;
}

.terminal-area {
  background: #0c0f13;
}

#terminal {
  min-height: 0;
  flex: 1 1 auto;
  padding: 8px;
}

#terminal .xterm {
  height: 100%;
}

@media (max-width: 760px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: 220px minmax(0, 1fr);
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .main {
    grid-template-rows: minmax(240px, 1fr) minmax(180px, 34vh);
  }
}