:root {
  color-scheme: light dark;
  --border: #ccc;
  --bg-alt: #f4f4f4;
  --badge-bg: #e0e7ff;
  --error: #b00020;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0 1rem 2rem;
  max-width: 60rem;
  margin-inline: auto;
}

header {
  padding: 1rem 0;
}

h1 { font-size: 1.4rem; }

#selector {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

#status {
  margin: 0;
  font-style: italic;
}

#status.error {
  color: var(--error);
  font-style: normal;
  font-weight: bold;
}

select, input[type="text"], button {
  font-size: 1rem;
  padding: 0.35rem 0.5rem;
}

#stats {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
}

#stats dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.75rem;
  margin: 0;
}

#stats dt { font-weight: bold; }
#stats dd { margin: 0; }

#controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

#filter-input { flex: 1; min-width: 12rem; }

#tree-container {
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  max-height: 60vh;
  overflow: auto;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
}

ul.tree, ul.tree ul {
  list-style: none;
  margin: 0;
  padding-left: 1.25rem;
}

ul.tree { padding-left: 0; }

.tree summary {
  cursor: pointer;
  padding: 0.1rem 0;
}

.tree summary:focus-visible,
.tree .file:focus-visible {
  outline: 2px solid #4040ff;
}

.tree .file {
  padding: 0.1rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge {
  background: var(--badge-bg);
  border-radius: 3px;
  padding: 0.05rem 0.4rem;
  font-size: 0.8rem;
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  :root {
    --border: #555;
    --bg-alt: #222;
    --badge-bg: #333a66;
    --error: #ff6b6b;
  }
  body { background: #111; color: #eee; }
}