body {
    background: #7f7fd5; /* fallback for old browsers */
    background: -webkit-linear-gradient(to right, #91eae4, #86a8e7, #7f7fd5); /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to right, #91eae4, #86a8e7, #7f7fd5); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

.bg-white {
    background-color: #ffffff;
}

#descripcion {
    resize: none;
}

.centrado {
    text-align: center;
    vertical-align: middle;
}
#boton_maldito, .clase-1 .clase-2
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
  -webkit-appearance: none; 
  margin: 0; 
}

input[type=number] { -moz-appearance:textfield; }