body {
    font-family: 'Open Sans', Arial, sans-serif;
    background-color: #f1f1f1;
    margin: 0;
    padding: 0;
}
.header {
    text-align: center;
    padding: 20px;
    background-color: #333;
    color: #fff;
}
.header img {
    border-radius: 50%;
    border: 2px solid #fff;
}
.section {
    margin: 20px;
    padding: 20px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.section h2 {
    color: #333;
    font-size: 24px;
}
.section p, .section ul {
    margin-left: 20px;
    color: #666;
}
nav {
    text-align: center;
    margin: 20px;
    padding: 10px;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
nav a {
    margin: 0 15px;
    text-decoration: none;
    color: #007bff;
    transition: color 0.3s ease;
}
nav a:hover {
    color: #0056b3;
}
.project-image {
    width: 100%;
    max-width: 300px;
    height: auto;
}
.aqi-widget {
    border: 1px solid #ccc;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.aqi-widget h2 {
    font-size: 18px;
    color: #333;
}
.aqi-widget p {
    font-size: 16px;
    margin-left: 20px;
    color: #666;
}