.converter-header {
  background: white;
  border-bottom: 1px solid #e2e8f0;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.converter-panel {
  background: white;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.converter-panel.input {
  border-right: 1px solid #e2e8f0;
}

.pane-header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
  font-weight: 600;
  color: #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pane-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.textarea {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: #333;
  padding: 1rem;
  border: none;
  outline: none;
  resize: none;
  width: 100%;
  height: 100%;
  min-height: 300px;
  background: white;
  overflow: auto;
}

.textarea:focus {
  box-shadow: inset 0 0 0 2px rgba(59, 130, 246, 0.5);
}

.textarea.output {
  background: #f8fafc;
  color: #1e293b;
}

.textarea.readonly {
  cursor: default;
}

.message {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  border-radius: var(--radius);
  margin: 1rem 1.5rem;
}

.error-message {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
}

.success-message {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
}

.stats {
  padding: 0.5rem 1.5rem;
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
  font-size: 0.75rem;
  color: #64748b;
  display: flex;
  justify-content: space-between;
}

.options-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.checkbox-group input[type='checkbox'] {
  width: 1rem;
  height: 1rem;
  accent-color: #3b82f6;
}

.checkbox-group label {
  font-size: 0.875rem;
  color: #374151;
  cursor: pointer;
}

.main-content {
  display: flex;
  height: calc(100vh - 140px);
}

.hidden {
  display: none !important;
}

@media (max-width: 768px) {
  .converter-header {
    flex-direction: column;
    gap: 0.5rem;
  }

  .options-group {
    flex-wrap: wrap;
  }

  .main-content {
    flex-direction: column;
    height: auto;
  }

  .converter-panel {
    width: 100%;
    height: 50vh;
  }

  .converter-panel.input {
    border-right: none;
    border-bottom: 1px solid #e2e8f0;
  }
}