:root {
  color-scheme: light dark;
  --fg: #1d2125; --muted: #6b7280; --bg: #ffffff; --line: #e5e7eb; --accent: #2563eb;
  --ok-bg: #ecfdf5; --ok-fg: #065f46; --err-bg: #fef2f2; --err-fg: #991b1b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e5e7eb; --muted: #9ca3af; --bg: #111418; --line: #2a2f36; --accent: #60a5fa;
    --ok-bg: #0b2e22; --ok-fg: #6ee7b7; --err-bg: #3a1212; --err-fg: #fca5a5;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.45 system-ui, sans-serif; color: var(--fg); background: var(--bg); }
main { max-width: 60rem; margin: 0 auto; padding: 1rem; }
main.narrow { max-width: 26rem; padding-top: 12vh; }
code { font-size: 0.9em; }
.bar { display: flex; align-items: center; gap: 0.75rem; padding: 0.6rem 1rem; border-bottom: 1px solid var(--line); }
.spacer, .grow { flex: 1; }
.muted, .hint, .count, .undefined .tag { color: var(--muted); }
.hint { font-size: 0.85em; }
.row { display: flex; gap: 0.5rem; align-items: center; min-width: 0; }
.stack { display: flex; flex-direction: column; gap: 0.6rem; }
.add { margin-bottom: 1rem; flex-wrap: wrap; }
input { font: inherit; color: inherit; background: transparent; padding: 0.35rem 0.5rem;
        border: 1px solid var(--line); border-radius: 6px; min-width: 0; }
input:focus { outline: 2px solid var(--accent); border-color: transparent; }
button { font: inherit; padding: 0.35rem 0.8rem; border-radius: 6px; cursor: pointer;
         border: 1px solid var(--line); background: transparent; color: inherit; }
button[type=submit]:not(.link):not(.danger) { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { color: var(--err-fg); }
button.link { border: 0; padding: 0; color: var(--accent); }
.flash { padding: 0.5rem 0.75rem; border-radius: 6px; margin: 0 0 0.75rem; }
.notice { background: var(--ok-bg); color: var(--ok-fg); }
.error { background: var(--err-bg); color: var(--err-fg); }
.tree { list-style: none; margin: 0; padding: 0; }
.node { display: flex; gap: 0.75rem; align-items: center; padding: 0.3rem 0; border-bottom: 1px solid var(--line); }
.tag { min-width: 9rem; font-weight: 600; white-space: nowrap; }
.count { min-width: 7rem; font-size: 0.85em; white-space: nowrap; }
.depth-1 { padding-left: 1.5rem; } .depth-2 { padding-left: 3rem; } .depth-3 { padding-left: 4.5rem; }
.depth-4 { padding-left: 6rem; } .depth-5 { padding-left: 7.5rem; } .depth-6 { padding-left: 9rem; }
@media (max-width: 40rem) {
  .node { flex-wrap: wrap; }
  .node .row { flex-basis: 100%; }
}