:root {
  --bg: #0b0e13;
  --panel: #14171c;
  --panel-2: #1b1f27;
  --edge: #2a303a;
  --ink: #e5e7eb;
  --dim: #8b93a1;
  --accent: #a78bfa;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

a { color: var(--accent); }
.dim { color: var(--dim); }

header {
  padding: 1.25rem 1.5rem 0.75rem;
  border-bottom: 1px solid var(--edge);
}
header h1 { margin: 0 0 0.25rem; font-size: 1.25rem; }
header p { margin: 0.25rem 0; max-width: 70ch; font-size: 0.85rem; }

main {
  display: grid;
  grid-template-columns: 20rem 1fr;
  gap: 1rem;
  padding: 1rem 1.5rem 3rem;
  align-items: start;
}
@media (max-width: 860px) {
  main { grid-template-columns: 1fr; }
  aside ul { max-height: 16rem; }
}

aside { position: sticky; top: 1rem; }
.controls { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 0.5rem; }
.check { display: flex; align-items: center; gap: 0.4rem; font-size: 0.8rem; color: var(--dim); }

input[type="search"] {
  width: 100%;
  padding: 0.45rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid var(--edge);
  background: var(--panel-2);
  color: var(--ink);
}

aside ul {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 70vh;
  overflow-y: auto;
  border: 1px solid var(--edge);
  border-radius: 0.75rem;
  background: var(--panel);
}
aside li { border-bottom: 1px solid var(--edge); }
aside li:last-child { border-bottom: 0; }

aside button {
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.7rem;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}
aside button:hover { background: var(--panel-2); }
aside button[aria-current="true"] { background: var(--panel-2); box-shadow: inset 2px 0 0 var(--accent); }
aside button .meta { font-size: 0.72rem; color: var(--dim); }
aside button.unsurveyed .name { color: var(--dim); }

#viewer {
  border: 1px solid var(--edge);
  border-radius: 0.75rem;
  background: var(--panel);
  padding: 1rem;
  min-height: 20rem;
}
#viewer h2 { margin: 0 0 0.2rem; font-size: 1.05rem; }
#viewer > .dim { padding: 4rem 1rem; text-align: center; }

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.75rem 0;
}
.stats span {
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--dim);
}
.stats span.warn { color: #f59e0b; }
.stats span.good { color: #22c55e; }

canvas {
  width: 100%;
  max-width: 46rem;
  height: auto;
  aspect-ratio: 1;
  display: block;
  margin: 0 auto;
  background: #0e1116;
  border-radius: 0.5rem;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 0.6rem;
  font-size: 0.72rem;
  color: var(--dim);
}
.legend i {
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  margin-right: 0.3rem;
  vertical-align: middle;
}

#hint { font-size: 0.78rem; text-align: center; }