body {
    margin: 0;
    font-family: Arial;
}

/* Header */
header {
    background-color: red;
    color: white;
    text-align: center;
    padding: 15px;
}

/* Navigation */
nav {
    display: flex;
    background-color: black;
    justify-content: center;
}

nav a {
    color: white;
    padding: 10px 20px;
    text-decoration: none;
}

nav a:hover {
    background-color: red;
}

/* Flexbox Container */
.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

/* Boxes */
.box {
    background-color: lightgray;
    margin: 10px;
    padding: 20px;
    width: 250px;
}

/* Footer */
footer {
    background-color: red;
    color: white;
    text-align: center;
    padding: 10px;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        flex-direction: column;
        align-items: center;
    }
}