h2, h3 {
            color: #222;
        }
        input[type="text"] {
            padding: 8px 12px;
            font-size: 16px;
            width: 70%;
            max-width: 600px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box;
            font-family: vuonghiep;
        }
        button {
            background-color: #007bff;
            border: none;
            color: white;
            padding: 9px 18px;
            font-size: 16px;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s ease;
            font-family: vuonghiep;
        }
        button:hover {
            background-color: #0056b3;
        }
        .meta-box {
            background: #fff;
            border: 1px solid #ddd;
            padding: 12px 15px;
            margin-bottom: 15px;
            border-radius: 6px;
            position: relative;
            font-family: vuonghiep;
        }
        .meta-box strong {
            display: block;
            margin-bottom: 6px;
            font-weight: 600;
            color: #444;
        }
        .og-image-container {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-top: 8px;
        }
        .og-image-container img {
            height: 70px;
            width: auto;
            border: 1px solid #ccc;
            border-radius: 4px;
            object-fit: contain;
            flex-shrink: 0;
            background: #fafafa;
            padding: 3px;
        }
        .og-image-url {
            word-break: break-word;
            color: #666;
            font-size: 14px;
            user-select: text;
        }
        .copy-btn {
            position: absolute;
            top: 12px;
            right: 12px;
            background-color: #28a745;
            border: none;
            color: white;
            padding: 5px 12px;
            font-size: 13px;
            border-radius: 3px;
            cursor: pointer;
            transition: background-color 0.25s ease;
            user-select: none;
            font-family: vuonghiep;
        }
        .copy-btn:hover {
            background-color: #1e7e34;
        }
        .copy-btn:active {
            background-color: #155724;
        }
        /* Khung nội dung bài viết */
        .clean-content {
            background: #fff;
            border: 1px solid #ccc;
            padding: 15px;
            margin-bottom: 25px;
            border-radius: 6px;
            line-height: 1.6;
            font-family: vuonghiep;
        }
        .clean-content img {
    display: block;
    margin: 10px auto; /* căn giữa và có khoảng cách trên dưới */
    max-width: 100%;
    height: auto;
}


.meta-box pre,
.html-code {
    background: #f8f8f8;
    padding: 10px;
    border: 1px solid #ccc;
    font-family: monospace;
    font-size: 14px;
    overflow-x: auto;
    white-space: pre-wrap;
    border-radius: 4px;
    margin-bottom: 8px;
    max-height: 80px;
}