body {
    font-family: sans-serif;
    margin: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

h1 {
    margin-top: 0;
}

.input-group {
    margin-bottom: 20px;
}

.form-control {
    width: 500px;
    padding: 10px;
    border: 1px solid #ccc;
}

.btn-primary {
    margin-left: 10px;
    padding: 10px 20px;
    background-color: #007bff;
    color: #fff;
    border: 1px solid #007bff;
}

#result {
    border: 1px solid #ccc;
    padding: 20px;
    margin-top: 20px;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    padding: 5px;
    border-bottom: 1px solid #ccc;
}