* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f9;
}

.container {
    width: 400px;
    padding: 2em;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h2 {
    margin-bottom: 1em;
    color: #004d40;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 1em;
}

.hidden {
    display: none;
}

input {
    padding: 0.8em;
    font-size: 1em;
    border-radius: 5px;
    border: 1px solid #ddd;
}

button {
    padding: 0.8em;
    font-size: 1em;
    background-color: #004d40;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #00796b;
}

.toggle {
    font-size: 0.9em;
    color: #00796b;
    cursor: pointer;
}

.toggle:hover {
    text-decoration: underline;
}