body { background-color: #1a202c; color: #e2e8f0; }
.qr-code-container { background-color: white; padding: 1rem; border-radius: 0.5rem; display: inline-block; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); }
.form-input { background-color: #2d3748; border: 1px solid #4a5568; color: #e2e8f0; border-radius: 0.375rem; }
.form-input::placeholder { color: #a0aec0; }
.btn-primary { background-color: #4299e1; color: white; transition: background-color 0.3s; }
.btn-primary:hover { background-color: #2b6cb0; }
.btn-secondary { background-color: #4a5568; color: white; }
.btn-secondary:hover { background-color: #2d3748; }

/* --- NUEVOS ESTILOS PARA EL SELECTOR DE IDIOMA --- */
.lang-switcher {
    background-color: #2d3748;
    color: #a0aec0;
    padding: 0.25rem 0.75rem;
    border-radius: 0.375rem;
    font-weight: 600;
    border: 2px solid transparent;
    transition: all 0.2s ease-in-out;
}
.lang-switcher.active {
    background-color: #4299e1;
    color: white;
    border-color: #63b3ed;
}