body {
    font-family: Arial, sans-serif;
    max-width: 800px;
    margin: 40px auto;
    background: #f4f6f8;
}

h1 {
    text-align: center;
}

form {
    background: white;
    padding: 20px;
    border-radius: 8px;
}

fieldset {
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 6px;
}

legend {
    font-weight: bold;
}

label {
    display: block;
    margin: 6px 0;
}

.counter {
    font-weight: bold;
    margin: 15px 0;
}

.error {
    color: red;
    margin-bottom: 10px;
}

.submit-btn {
    padding: 10px 15px;
    margin-right: 10px;
    border: none;
    background: #0077cc;
    color: white;
    border-radius: 5px;
    cursor: pointer;
}

.submit-btn:hover {
    background: #005fa3;
}