/* Responsive Navigation */
nav {
    background-color: #333;
    overflow: hidden;
}

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

nav li {
    float: left;
}

nav a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

/* Responsive Header */
header {
    background-color: #f2f2f2;
    text-align: center;
    padding: 20px;
}

/* Responsive Main Content */
main {
    padding: 20px;
}

/* Responsive Footer */
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
}