/* ── Roman Numeral Converter — tool-specific styles ───────────────────────────
   Global styles are inherited from /css/style.css.
   Colours reference CSS custom properties only — no hardcoded values.
   ─────────────────────────────────────────────────────────────────────────── */

.rnc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.rnc-tab {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--tool-input-radius, 12px);
  background: var(--bg-input);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.rnc-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-input);
}

.rnc-panel-title {
  margin: 0 0 0.25rem;
}

.rnc-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.rnc-input {
  font-family: var(--font-mono, 'Courier New', Courier, monospace);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.rnc-output {
  font-weight: 600;
}

.rnc-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.rnc-error {
  color: #dc2626;
  background: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: var(--tool-input-radius, 12px);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  margin-bottom: 1rem;
  white-space: pre-wrap;
}

.rnc-error[hidden] { display: none; }

/* ── Reference chart ──────────────────────────────────────────────────── */

.rnc-chart-subheading {
  margin: 1.25rem 0 0.6rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.rnc-chart-subheading:first-of-type {
  margin-top: 0.5rem;
}

.rnc-chart {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 0.5rem;
}

.rnc-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.5rem 0.3rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control, 8px);
  background: var(--bg-input, var(--bg-card));
}

.rnc-chip strong {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.03em;
}

.rnc-chip code {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  color: var(--accent);
}

@media (max-width: 640px) {
  .rnc-actions-row {
    gap: 0.4rem;
  }
}