body {
    background-image: url("../img/portada.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}
.warning-txt{
    color: red;
}
.success-txt{
    color: green;
}

.tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    bottom: 125%; /* Position the tooltip above the text */
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltiptext::after {
    content: " ";
    position: absolute;
    top: 100%; /* At the bottom of the tooltip */
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: #555 transparent transparent transparent;
}

.group:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}