body {
  font-family: Georgia, serif;
  margin: 0;
  background: #111;
  color: #f4f1ea;
}

main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.5rem;
}

.flag {
  background: #3b2f1a;
  border: 1px solid #c4a35a;
  padding: 0.75rem 1rem;
}

.error {
  color: #ffb4b4;
}

.metrics {
  border-top: 1px solid #444;
  margin-top: 1.5rem;
  padding-top: 1rem;
}

.metric-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
}

.metric-grid div {
  background: #1c1c1c;
  border: 1px solid #444;
  padding: 0.75rem;
}

.metric-grid strong,
.metric-grid span {
  display: block;
}

.metric-grid strong {
  color: #f0d28a;
  font-size: 1.4rem;
}

.metric-grid span,
.label {
  color: #c9c4b7;
  font-size: 0.9rem;
}

.explanation {
  border-top: 1px solid #444;
  margin-top: 1.5rem;
  padding-top: 1rem;
}

form {
  display: grid;
  gap: 0.75rem;
}

label {
  display: grid;
  gap: 0.25rem;
}

input {
  background: #1c1c1c;
  border: 1px solid #666;
  color: #f4f1ea;
  font: inherit;
  padding: 0.5rem;
}

.result {
  border-left: 3px solid #c4a35a;
  margin-top: 1rem;
  padding-left: 1rem;
}

button {
  font: inherit;
  cursor: pointer;
}

pre {
  overflow: auto;
  background: #1c1c1c;
  padding: 1rem;
}