body { 
    font-family: sans-serif; 
    padding: 20px; 
    line-height: 1.6; 
}

.patent-card { 
    border: 2px solid #333; 
    padding: 20px; 
    cursor: pointer; 
    background: #f9f9f9;
    max-width: 500px;
    transition: background 0.3s;
}

.patent-card:hover { 
    background: #eef; 
}

.details-container { 
    margin-top: 15px; 
    border-top: 1px solid #ccc; 
    padding-top: 10px; 
}

.detail-item { 
    margin-bottom: 5px; 
}

.label { 
    font-weight: bold; 
    color: #555; 
}