:root {
  --ink: #0d1117;
  --paper: #f6f8fa;
  --line: #d0d7de;
  --muted: #57606a;
  --accent: #1f6feb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.page { max-width: 900px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }

h1 { font-size: 2rem; margin: 0 0 .35rem; letter-spacing: -0.02em; }

.lede { color: var(--muted); margin: 0 0 1.75rem; max-width: 52ch; }

.board { display: flex; flex-wrap: wrap; gap: 2rem; align-items: flex-start; }

canvas {
  width: 280px;
  height: 280px;
  background: #000;
  border-radius: 12px;
  border: 1px solid var(--line);
  cursor: crosshair;
  touch-action: none;
  display: block;
}

.controls { display: flex; gap: .5rem; margin-top: .75rem; }

button {
  font: inherit;
  padding: .5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
}

button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button:disabled { opacity: .5; cursor: default; }

.answer { flex: 1 1 320px; min-width: 300px; }

.digit {
  font-size: 5.5rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.what { margin: .6rem 0; max-width: 46ch; }

.idle { color: var(--muted); }

.distances { border-collapse: collapse; margin-top: 1rem; font-variant-numeric: tabular-nums; }
.distances th, .distances td { padding: .2rem .9rem .2rem 0; text-align: left; }
.distances th { color: var(--muted); font-weight: 500; border-bottom: 1px solid var(--line); }
.distances tr.best td { font-weight: 700; color: var(--accent); }

.note, .provenance { color: var(--muted); font-size: .875rem; }
.provenance { margin-top: 2.5rem; border-top: 1px solid var(--line); padding-top: 1rem; max-width: 62ch; }

.error { color: #b42318; background: #fff1f0; border: 1px solid #ffccc7; padding: .6rem .8rem; border-radius: 8px; }

.booting { padding: 3rem 1.25rem; color: var(--muted); font: 16px system-ui, sans-serif; }

#blazor-error-ui {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: #ffe8a3;
  padding: .7rem 1.25rem;
}