body {
    font-family: Arial, sans-serif;
    background-color: #f0f8ff;
    text-align: center;
    padding: 50px;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
}

nav ul li a:hover {
    color: #007BFF;
}

h1 {
    color: #333;
}

form {
    margin-top: 20px;
}

textarea {
    width: 100%;
    max-width: 600px;
}

select {
    margin-top: 10px;
}

input[type="submit"] {
    margin-top: 10px;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

input[type="submit"]:hover {
    background-color: #45a049;
}

#progress-bar {
    margin-top: 20px;
}

.progress {
    width: 100%;
    max-width: 600px;
    background-color: #f3f3f3;
    border-radius: 5px;
    overflow: hidden;
    margin: 0 auto;
}

.progress-bar {
    width: 0%;
    height: 20px;
    background-color: #4CAF50;
    text-align: center;
    line-height: 20px;
    color: white;
    transition: width 0.4s;
}

#progress-percentage {
    margin-top: 10px;
    font-size: 1.2em;
}