.doc-card {
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}
.doc-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.doc-preview {
    height: 500px;
    background: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.doc-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.doc-title {
    color: #0d6efd;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    display: block;
    margin-bottom: 0.5rem;
}
.doc-title:hover {
    color: #0b5ed7;
}
.date-stamp {
    font-size: 0.875rem;
    color: #6c757d;
}
.preview-link {
    display: block;
    height: 100%;
    text-decoration: none;
}