/* Estilos base y comunes */
:root {
  --primary-color: #3498db;
  --secondary-color: #2980b9;
  --error-color: #e74c3c;
  --success-color: #2ecc71;
  --text-color: #2c3e50;
  --light-gray: #ecf0f1;
  --medium-gray: #bdc3c7;
  --dark-gray: #7f8c8d;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f5f5f5;
  color: var(--text-color);
  line-height: 1.6;
}

/* Spinner de carga */
.loading-spinner {
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top: 3px solid white;
  width: 20px;
  height: 20px;
  animation: spin 1s linear infinite;
  margin-left: 10px;
  display: inline-block;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

button {
  display: flex;
  align-items: center;
  justify-content: center;
}

button .loading-spinner {
  margin-left: 8px;
  display: none;
}

button.is-loading span {
  display: none;
}

button.is-loading .loading-spinner {
  display: block;
}