.pdf-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(var(--desk), 1fr);
}

@media (max-width: 768px) {
    .pdf-grid {
        grid-template-columns: repeat(var(--mob), 1fr);
    }
}

.open-pdf i,
.unlock i,
.wa i {
    margin-right: 6px;
    font-size: 16px;
    vertical-align: middle;
}
.wa {
    background: #25D366;
    color: #fff;
    padding: 8px;
    display: block;
    text-decoration: none;
    margin-top: 6px;
}

.wa:hover {
    background: #1ebe5d;
}

.pdf-card {
    border: 1px solid #ddd;
    padding: 15px;
    text-align: center;
}

.pdf-card img {
    width: 100%;
    height: auto;
}

.open-pdf,
.unlock {
    width: 100%;
    padding: 10px;
    background: #000;
    color: #fff;
    border: none;
    margin-top: 8px;
}

.panel {
    display: none;
    margin-top: 10px;
}

.panel input {
    width: 100%;
    padding: 10px;
    margin-bottom: 6px;
}

.wa {
    display: block;
    background: #25D366;
    color: #fff;
    padding: 8px;
    margin-top: 6px;
    text-decoration: none;
}

.pdf-pagination {
    margin-top: 20px;
    text-align: center;
}