body {
  display: grid;
  place-items: center;
  padding: clamp(0.75rem, 2.5vw, 2rem);
}

#app {
  width: min(1180px, 100%);
  min-height: min(820px, calc(100vh - 2rem));
}

.editor-shell {
  display: flex;
  flex-direction: column;
  min-height: inherit;
  max-height: calc(100vh - 2rem);
  overflow: hidden;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  position: relative;
}

.editor-title,
.status-line,
.command-line {
  display: flex;
  align-items: center;
  min-height: 2rem;
  padding-inline: 0.75rem;
  flex-shrink: 0;
}

.editor-title {
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: var(--background);
  color: var(--muted);
  font-size: 0.78rem;
}

.editor-header-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.tree-toggle-btn {
  border: 1px solid var(--border);
  padding: 0.1rem 0.4rem;
  background: var(--surface-raised);
  color: var(--yellow);
  font-size: 0.72rem;
  cursor: pointer;
  border-radius: 2px;
}

.tree-toggle-btn:hover {
  border-color: var(--yellow);
  background: var(--selection);
}

.tab-line {
  display: flex;
  flex-shrink: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  background: var(--surface-raised);
}

.tab-line button {
  flex: 0 0 auto;
  border: 0;
  border-right: 1px solid var(--border);
  padding: 0.62rem 1rem;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.tab-line button:hover {
  background: var(--selection);
  color: var(--text);
}

.tab-line button[aria-current='page'] {
  background: var(--surface);
  color: var(--green);
}

.editor-workspace {
  display: flex;
  min-height: 0;
  flex: 1;
  overflow: hidden;
}

.buffer {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  scroll-behavior: smooth;
}

.buffer-line {
  display: grid;
  grid-template-columns: var(--gutter) minmax(0, 1fr);
  border-bottom: 1px solid transparent;
}

.buffer-line.is-selected {
  border-bottom-color: var(--border);
  background: var(--selection);
}

.line-number {
  padding: 1.5rem 0.8rem 1.5rem 0;
  border-right: 1px solid var(--border);
  color: var(--muted);
  text-align: right;
  user-select: none;
}

.line-content {
  min-width: 0;
  padding: 1.5rem clamp(1rem, 3vw, 2.5rem);
}

.status-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 1rem;
  border-top: 1px solid var(--border-strong);
  background: var(--green);
  color: var(--background);
  font-size: 0.78rem;
  position: sticky;
  bottom: 2rem;
  z-index: 99;
}

.status-line strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.command-line {
  gap: 0.4rem;
  border-top: 1px solid var(--border);
  background: var(--background);
  position: sticky;
  bottom: 0;
  z-index: 100;
}

.command-line label {
  color: var(--yellow);
}

.command-line input {
  min-width: 0;
  flex: 1;
  border: 0;
  background: transparent;
  color: var(--text);
  outline: 0;
}

.command-line button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}