.aop-container {
            max-width: 500px;
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            margin: auto;
        }
        .aop-container h2 {
            text-align: center;
        }
        .form-group {
            margin-bottom: 15px;
        }
        .form-group label {
            display: block;
            margin-bottom: 5px;
        }
        .form-group input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }
        .calculate-btn {
            width: 100%;
            padding: 10px;
            background: #007bff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        .calculate-btn:hover {
            background: #0056b3;
        }
        .result-container {
            margin-top: 20px;
            padding: 15px;
            background: #e8f0fe;
            border-radius: 4px;
            text-align: center;
            font-size: 18px;
        }