.loader {
    font-size: 30px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: grid;
    place-items: center;
}

.hidden-loader {
    display: none;
}


.card-surat {
    cursor: pointer;
    transition: 0.8s;
}

.card-surat:hover {
    background-color: #caded1;
}

.hidden-button {
    display: none;
}