.fondo {
    background-color: red;
    padding: 20px;
    display: block;
    margin-top: 60px;   
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 100px;
    width: 250px;
    height: 450px;
    background-image: url("../assets/huella.png");
    background-repeat: no-repeat;
    background-size: 300px;
    background-position: center;
    border-radius: 20px;
    box-shadow: 0px 0px 2px 2px rgb(221, 221, 221);
    padding: 30px;
    background-color: white;
    width: 250px;
    height: 450px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 10px;
    color: #b3b3b3;   
}
/* 
#log {
    background-image: url("../assets/huella.png");
    background-repeat: no-repeat;
    background-size: 300px;
    background-position: center;
    border-radius: 20px;
    box-shadow: 0px 0px 2px 2px rgb(221, 221, 221);
    padding: 30px;
    background-color: white;
    width: 250px;
    height: 450px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 10px;
    color: #b3b3b3;
    background-color: red;
} */

#log2 {
    padding-top: 40%;
}

#casilla {
    margin-bottom: 20px;
    padding-right: 80px;
    border-bottom-color: #0066bf;
    border-bottom-width: 3px;
    border-top: none;
    border-right: none;
    border-left: none;
    outline: none;
    background-color: transparent;
}

.button {
    display: inline-block;
    border-radius: 4px;
    background-color: #0066bf;
    border: none;
    color: #FFFFFF;
    text-align: center;
    font-size: 20px;
    padding: 10px;
    width: 150px;
    transition: all 0.5s;
    cursor: pointer;
    margin: 50px;
}
  
.button span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
}
  
.button span:after {
    content: '\00bb';
    position: absolute;
    opacity: 0;
    top: 0;
    right: -20px;
    transition: 0.5s;
}
  
.button:hover span {
    padding-right: 25px;
}
  
.button:hover span:after {
    opacity: 1;
    right: 0;
}

.alert {
    font-size: large;
    color: red;    
    text-align: center;
}