:root {
  --bg: #f7f7f5;
  --fg: #1f2328;
  --muted: #5f6670;
  --panel: #ffffff;
  --border: #d8dadd;
  --accent: #2b6cb0;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181b;
    --fg: #e6e8eb;
    --muted: #9aa1aa;
    --panel: #1f2226;
    --border: #353a40;
    --accent: #6ea8e8;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 16px;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header h1 { font-size: 20px; margin: 0 0 6px; }
header p { margin: 0 0 12px; color: var(--muted); max-width: 90ch; }

button, select, input {
  font: inherit;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
#add { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}
.toggle { display: flex; align-items: center; gap: 4px; padding-top: 4px; }
.legend { flex: 1 1 320px; padding-top: 4px; }
.legend summary { cursor: pointer; color: var(--accent); }
.legend ul, .legend p { color: var(--muted); max-width: 100ch; }
.legend ul { padding-left: 20px; margin: 6px 0; }
.legend p { margin: 6px 0; }

#panels { display: grid; grid-template-columns: 1fr; gap: 12px; }
#panels.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  min-width: 0;
}
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.controls .win { display: inline-flex; gap: 4px; align-items: center; }
.controls .spacer { flex: 1; }
.controls a { text-decoration: none; padding: 3px 6px; }
.controls [disabled] { opacity: 0.45; }
.caption { margin: 6px 2px; color: var(--muted); font-size: 13px; }
.caption b { color: var(--fg); font-weight: 600; }

.view {
  height: 60vh;
  min-height: 240px;
  resize: vertical;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  position: relative;
}
.view svg { width: 100%; height: 100%; display: block; }
.view .msg {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: #5f6670;
}
.status { color: var(--muted); }
.status:empty { display: none; }

@media (max-width: 600px) {
  body { padding: 12px; }
  #panels.two { grid-template-columns: 1fr; }
  .view { height: 50vh; }
}