:root {
  color-scheme: light dark;
  --border: #d0d0d0;
  --bg-card: rgba(127, 127, 127, 0.06);
  --accent: #4f6bed;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 640px;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.5;
}

h1 {
  margin-bottom: 0.25rem;
}

.subtitle {
  margin-top: 0;
  opacity: 0.75;
}

.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
}

.card h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

label {
  display: block;
  font-size: 0.85rem;
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
  opacity: 0.85;
}

.row {
  display: flex;
  gap: 0.5rem;
}

input[type="text"] {
  flex: 1;
  min-width: 0;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  color: inherit;
  font-family: ui-monospace, monospace;
  font-size: 0.8rem;
}

button {
  padding: 0.55rem 1rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-size: 0.95rem;
  cursor: pointer;
}

button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: inherit;
  margin-left: 0.5rem;
}

button:hover {
  filter: brightness(1.08);
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(127, 127, 127, 0.08);
  border-radius: 6px;
  padding: 0.75rem;
  font-size: 0.8rem;
  max-height: 480px;
  overflow: auto;
}