body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
}

.container {
    max-width: 400px;
    width: 100%;
    padding: 20px;
    background: white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

input, button {
    width: 100%;
    padding: 10px;
    margin: 5px 0;
}

button {
    background-color: #28a745;
    color: white;
    border: none;
    cursor: pointer;
}