:root {
  color-scheme: light dark;
}

body {
  margin: 0;
  padding: 20px;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  text-align: center;
}

main {
  max-width: 640px;
  margin: 0 auto;
}

hr {
  margin: 20px 0;
}

button {
  padding: 15px 20px;
  font-size: 16px;
  cursor: pointer;
}

button.primary {
  padding: 15px 30px;
  font-size: 18px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

#status {
  margin-top: 20px;
  font-variant-numeric: tabular-nums;
}

.diagnostics {
  text-align: left;
}

.diagnostics h2 {
  font-size: 16px;
  text-align: center;
}

.hint {
  font-size: 14px;
  line-height: 1.5;
  opacity: 0.8;
}

#log {
  margin-top: 12px;
  padding: 10px;
  min-height: 120px;
  max-height: 45vh;
  overflow: auto;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-all;
  opacity: 0.9;
}