body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
}

.container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    text-align: center;
    color: #333;
}

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

li {
    padding: 10px 0;
    border-bottom: 1px solid #ddd;
}

li:last-child {
    border-bottom: none;
}

input[type="text"] {
    padding: 10px;
    width: calc(100% - 24px);
    margin-bottom: 10px;
}

button {
    padding: 10px;
    background: #28a745;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #218838;
}