.pie-container {
        max-width: 800px;
        margin: 20px auto;
        padding: 20px;
        background: #f9f9f9;
        border-radius: 8px;
    }
    .pie-form {
        margin-bottom: 20px;
    }
    .pie-form label {
        display: block;
        margin-bottom: 5px;
        font-weight: bold;
    }
    .pie-form input[type='url'] {
        width: 100%;
        padding: 8px;
        margin-bottom: 10px;
        border: 1px solid #ccc;
        border-radius: 4px;
    }
    .pie-form input[type='submit'] {
        padding: 10px 20px;
        background: #0073aa;
        color: #fff;
        border: none;
        border-radius: 4px;
        cursor: pointer;
    }
    .pie-form input[type='submit']:hover {
        background: #005177;
    }
    .pie-table {
        width: 100%;
        border-collapse: collapse;
        margin-top: 20px;
    }
    .pie-table th, .pie-table td {
        padding: 10px;
        border: 1px solid #ddd;
        vertical-align: top;
    }
    .pie-table th {
        width: 20%;
        background: #e0e0e0;
    }
    .pie-table img.pie-thumbnail {
        max-width: 200px;
        height: auto;
    }
    .pie-error {
        background: #ffe6e6;
        padding: 10px;
        border: 1px solid #ff6666;
        border-radius: 4px;
        margin-top: 20px;
    }