body {
        margin: 0;
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        background: gray;
    }

    .container {
        background: #fff;
        padding: 30px 40px;
        border-radius: 15px;
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        text-align: center;
        width: 400px;
    }

    h1 {
        font-size: 36px;
        margin-bottom: 20px;
        color: #303f9f;
        font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    }

    input[type="text"] {
        width: 90%;
        padding: 10px;
        font-size: 16px;
        border-radius: 8px;
        border: 1px solid #ccc;
        margin-bottom: 15px;
        transition: 0.3s;
    }

    input[type="text"]:focus {
        border-color: #3f51b5;
        box-shadow: 0 0 5px rgba(63, 81, 181, 0.5);
        outline: none;
    }

    button {
        padding: 10px 20px;
        margin: 5px;
        font-size: 16px;
        border: none;
        border-radius: 20px;
        background-color: #3f51b5;
        color: white;
        cursor: pointer;
        transition: 0.3s;
    }

    button:hover {
        background-color: #303f9f;
    }

    #output {
        margin-top: 20px;
        font-size: 20px;
        font-weight: bold;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }