.file-navigator {
    display: flex;
    background: #0f172a;
    color: #e2e8f0;
    font-size: 13px;
}
.file-navigator .tree {
    overflow: auto;
    border-right: 1px solid #444;
    padding: 4px 0 0 8px;
    background: #252526;
}
.file-navigator .viewer {
    flex: 1;
    padding: 8px;
    white-space: pre-wrap;
    font-family: Consolas, monospace;
}
.file-navigator .folder, .file-navigator .file {
    padding: 2px;
    border-radius: 4px;
}
.file-navigator .file {
    cursor: pointer;
}
.file-navigator .file.active {
    background: #3a3d41;
    font-weight: bold;
}
.file-navigator .file:hover {
    background: #3a3d41;
}
.file-navigator .children {
    margin-left: 6px;
}
.file-navigator .name {
    display: block;
}
.file-navigator .folder > .name::before {
    content: "📁 ";
}
.file-navigator .file::before {
    content: "📄 ";
}