body {
    background-color: #333333;
    color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 40px;
}

.form-container {
    width: 500px;
    margin: 0 auto;
    padding: 30px;
    background-color: black;
    border: 3px solid white;
    border-radius: 10px;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
}

label {
    display: block;
    margin-top: 15px;
    margin-bottom: 6px;
}

input[type="text"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    box-sizing: border-box;
    background-color: #222222;
    color: white;
    border: 1px solid white;
    border-radius: 4px;
}

.age-input {
    border-top: none;
}

input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    background-color: #444444;
    border: 2px solid #66ccff;
    outline: none;
}

fieldset {
    border: 1px solid gray;
    margin-top: 20px;
    margin-bottom: 20px;
    padding: 15px;
}

legend {
    font-weight: bold;
}

.choice {
    display: inline-block;
    margin-right: 15px;
    margin-bottom: 10px;
}

.choice input {
    width: auto;
}

textarea {
    height: 120px;
}

button {
    display: block;
    margin: 25px auto 0;
    padding: 12px 30px;
    background-color: white;
    color: black;
    border: none;
    border-radius: 5px;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background-color: #cccccc;
}