:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --text: #1c2129;
  --muted: #5d6673;
  --line: #d6dbe2;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --node: #1f6feb;
  --member: #0b8a6a;
  --support: #b45309;
  --preview: #7c3aed;
  --stage: #e9ecf0;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216;
    --panel: #171b21;
    --text: #e6e9ee;
    --muted: #9aa4b1;
    --line: #2a313b;
    --accent: #4c8dff;
    --accent-text: #0b0e12;
    --node: #6aa4ff;
    --member: #34d3a5;
    --support: #f5b04a;
    --preview: #c4a2ff;
    --stage: #0b0e12;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
}

.top {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  flex-wrap: wrap;
}
.top h1 { font-size: 18px; margin: 0 8px 0 0; }
.status { color: var(--muted); }
.teamlink { margin-left: auto; color: var(--accent); }
.pagectl input { width: 56px; }

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 240px 1fr 320px;
  min-height: 0;
}
.panel {
  background: var(--panel);
  padding: 12px 16px;
  overflow: auto;
}
.tools { border-right: 1px solid var(--line); }
.out { border-left: 1px solid var(--line); }
h2 { font-size: 15px; margin: 0 0 10px; }
h2.sub { margin-top: 4px; }
input[type=range] { width: 100%; accent-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: default; border-color: var(--line); }
h3 { font-size: 13px; margin: 16px 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }

.modes { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.mode, .btn {
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  text-align: left;
}
.mode:hover, .btn:hover { border-color: var(--accent); }
.mode.active, .btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}
.row { display: flex; gap: 6px; margin: 8px 0; }
.row.wrap { flex-wrap: wrap; }
.field { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; }
.field span { color: var(--muted); font-size: 12px; }
.field.check { flex-direction: row; align-items: center; }
select, input[type=number] {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 6px;
}
.help { margin-top: 14px; color: var(--muted); }
.help ol { padding-left: 18px; }
code { font-size: 12px; }

.stage {
  position: relative;
  background: var(--stage);
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
#canvas { display: block; width: 100%; height: 100%; cursor: crosshair; }
.drop {
  position: absolute;
  inset: 16px;
  border: 2px dashed var(--line);
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--muted);
  pointer-events: none;
}
.drop.hidden { display: none; }

.counts { color: var(--muted); margin: 0 0 8px; }
.tablewrap { max-height: 220px; overflow: auto; border: 1px solid var(--line); border-radius: 6px; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; font-size: 12px; }
th, td { padding: 3px 8px; border-bottom: 1px solid var(--line); text-align: right; }
th { position: sticky; top: 0; background: var(--panel); color: var(--muted); font-weight: 600; }
td:first-child, th:first-child { text-align: left; }
.note { color: var(--muted); font-size: 12px; margin-top: 16px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; grid-template-rows: auto 60vh auto; }
  .tools, .out { border: 0; border-bottom: 1px solid var(--line); }
}

.hint { margin: 0 0 8px; font-size: 12px; color: var(--muted); }
.readnotes { margin-top: 8px; font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 6px; padding: 8px; max-height: 220px; overflow: auto; }
.readnotes b { color: var(--text); }
.readnotes ul { margin: 4px 0 6px; padding-left: 18px; }
.readnotes .warn { color: var(--support); }