.directory-tree {
    background-color: #f8f9fa;
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin: 1.5rem 0;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.tree-item {
    margin: 0.25rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.tree-item::before {
    content: '├── ';
    position: absolute;
    left: 0;
    color: #6c757d;
}

.tree-item:last-child::before {
    content: '└── ';
}

.tree-folder {
    font-weight: bold;
    color: #0d6efd;
}

.tree-file {
    color: #198754;
}

.card {
    transition: transform 0.3s;
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.nav-pills .nav-link.active {
    background-color: #0d6efd;
}

.directory-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: #0d6efd;
    color: white;
    border-radius: 0.375rem;
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

.comparison-table th {
    background-color: #f8f9fa;
}

.example-box {
    background-color: #e8f4fd;
    border-left: 4px solid #0d6efd;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0.25rem;
}

.tip-box {
    background-color: #fff9e6;
    border-left: 4px solid #ffc107;
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 0.25rem;
}

.fhs-diagram {
    background-color: #f0f8ff;
    padding: 1.5rem;
    border-radius: 0.5rem;
    margin: 1.5rem 0;
}

.dir-category {
    font-weight: bold;
    color: #6c757d;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.25rem;
    border-bottom: 1px solid #dee2e6;
}