.post-collapse-item {
    margin-bottom: 20px;
}

.post-collapse-title {
    background-color: #f5f5f5;
    padding: 10px;
    cursor: pointer;
    border: 1px solid #ddd;
}

.post-collapse-content {
    display: none;
    padding: 10px;
    border: 1px solid #ddd;
    border-top: none;
}