.alert-success{
    color: #fff;
    background-color: #4CAF50;
    border-color: #4CAF50;
}
.alert-danger{
    color: #fff;
    background-color: #f44336;
    border-color: #f44336;
}
.alert-primary{
    color: #fff;
    background-color: #2196F3;
    border-color: #2196F3;
}
.alert-warning{
    color: #fff;
    background-color: #ff9800;
    border-color: #ff9800;
}
.loader {
    margin: 0 auto;
    border: 6px solid #f3f3f3;
    border-top: 6px solid #2196F3;
    border-radius: 50%;
    width: 120px;
    height: 120px;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.text-black{
    color: black;
}