.color_negro { color:#666; font-weight: normal; }
.texto_error { color: red; text-align: center; margin: 0 auto; margin: 10px; width: 100%; }
.txt_center { text-align:center;}
.mb0 { margin-bottom:0px;}
.email_negro { color:#000;text-align:left; }
.largo_clave { width: 50px; border: none; background: none; color: #fff; text-align: center;}	
.input-group-addon { padding: .5rem .75rem !important;}
input[type=number]::-webkit-inner-spin-button { color:#fff; border:1px solid #fff; }
.btn { font-size:12px !important; }