#form{
        margin: 310px 0 100px 110px;
        }

input.numbers {
        border-style: none;            /* options are none, dotted, dashed, solid, double, groove, ridge, inset, outset */
        border-width: 2px;
        border-color: #666666;    /* change the border color using the hexadecimal color codes for HTML */
        background: #222222;    /* change the background color using the hexadecimal color codes for HTML */
        padding: 2px 0px;
        width: 100px;
        text-align: center; 
        font-family: Arial; 
        font-size: 60px;
        font-weight: bold;            /* options are normal, bold, bolder, lighter */
        font-style: normal;            /* options are normal or italic */
        color: #FFFFFF;                /* change color using the hexadecimal color codes for HTML */
        }
        
    input.title {                    /* the styles below will affect the title under the numbers, i.e., “Days”, “Hours”, etc. */
        border: none;    
        padding: 0px;
        width: 55px;
        text-align: center; 
        font-family: Arial; 
        font-size: 18px; 
        font-weight: bold;            /* options are normal, bold, bolder, lighter */
        color: #FFFFFF;                /* change color using the hexadecimal color codes for HTML */
        background: transparent;  /* change the background color using the hexadecimal color codes for HTML */
        }
        
    #form {
	width: 400px;
	border: none;            /* options are none, dotted, dashed, solid, double, groove, ridge, inset, outset */
	text-align: center;        
		}
        
    #principal-portada {
	background-image: url(../images/fondo_cuenta_atras.jpg);
	background-repeat: no-repeat;
	margin-left: 0px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
	text-align: center;
        }