.mfe-explorer ul {
    list-style: none;
    margin: 0;
    padding-left: 20px;
    position: relative;
}

.mfe-explorer ul::before {
    content: "";
    position: absolute;
    top: 0;
    left: 10px;
    bottom: 0;
    width: 1px;
    background: #ccc;
}

.mfe-explorer li {
    position: relative;
    padding: 5px 0 5px 20px;
}

.mfe-explorer li::before {
    content: "";
    position: absolute;
    top: 18px;
    left: 0;
    width: 10px;
    height: 1px;
    background: #ccc;
}

.mfe-folder,
.mfe-file {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.mfe-folder img,
.mfe-file img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex-shrink: 0;
}

.mfe-subtree {
    margin-left: 0;
    padding-left: 20px;
}