style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f7fc;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
    color: #333;
    padding: 20px;
}

.container {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 30px;
    max-width: 400px;
    width: 100%;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #5a5a5a;
}

button {
    background-color: #4CAF50; /* Green */
    color: white;
    border: none;
    padding: 15px 32px;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #45a049;
}

button:active {
    background-color: #3e8e41;
}

.error {
    color: red;
    font-size: 1rem;
    margin-top: 20px;
}

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 20px;
        max-width: 90%;
    }

    button {
        padding: 12px 28px;
    }
}