body {
            background-color: #007bff;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .container {
            max-width: 800px;
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            padding: 30px;
            margin: 20px;
            text-align: center;
        }
        h1 {
            font-weight: bold;
            font-style: italic;
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.2);
            color: #333;
            margin-bottom: 20px;
        }
        .form-control {
            width: 100%;
            padding: 15px;
            border: 1px solid #ccc;
            border-radius: 5px;
            margin-bottom: 20px;
            box-sizing: border-box;
        }
        .btn {
            padding: 10px 20px;
            font-size: 16px;
            color: #fff;
            background-color: #007bff;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            margin-right: 10px;
            transition: background-color 0.3s;
            display: inline-flex;
            align-items: center;
        }
        .btn i {
            margin-right: 8px;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        .resultwrap {
            margin-top: 20px;
        }
        .diff {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
            text-align: left;
        }
        .diff th, .diff td {
            border: 1px solid #ddd;
            padding: 10px;
            font-family: 'Courier New', Courier, monospace;
        }
        .diff .replace {
            background-color: #fdd;
        }
        .diff .insert {
            background-color: #dfd;
        }
        .diff .unchanged {
            background-color: #fff;
        }
        .highlight {
            color: red;
            font-weight: bold;
        }