.error-message { color: #ff4d4f; padding: 10px; margin-top: 10px; background: #fff2f0; border: 1px solid #ffccc7; border-radius: 4px; display: none; }

.status-indicator { font-size: 12px; color: #666; margin-left: 10px; font-weight: normal; }

.json-key { color: #d32f2f; }

.json-string { color: #388e3c; }

.json-number { color: #1976d2; }

.json-boolean { color: #d81b60; }

.json-null { color: #7b1fa2; }

@media (min-width: 768px) {
    .tool-editor { grid-template-columns: 1fr; }
}