/* text-case-converter.css v2-r4 */

.case-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
}

.case-btn {
  font-size: 0.74rem;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border);
  background: #f9fafb;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
}

.case-btn:hover, .case-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.io-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

@media (max-width: 600px) { .io-grid { grid-template-columns: 1fr; } }

.io-block-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.io-textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  font-size: 0.88rem;
  background: #fff;
  resize: vertical;
  min-height: 180px;
  font-family: inherit;
  line-height: 1.55;
}

.io-textarea:focus { outline: none; border-color: var(--accent); }
.io-textarea.output { background: #f9fafb; }

.io-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.4rem;
}

.copy-confirm {
  font-size: 0.72rem;
  color: #16a34a;
  align-self: center;
  display: none;
}