body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f0f0f0;
}

header {
    background-color: #4CAF50;
    padding: 1em;
    text-align: center;
    color: white;
}

header a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
    font-weight: bold;
}

header a:hover {
    text-decoration: underline;
}

.container {
    padding: 20px;
}

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

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

button {
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}

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