* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #0056b3;
    color: white;
    padding: 10px 20px;
    text-align: center;
}

nav {
    margin: 20px 0;
}

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

nav a {
    text-decoration: none;
    color: #0056b3;
    margin: 0 10px;
}

#week-content {
    margin: 20px;
}

button {
    background-color: #0056b3;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #003f7f;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: #333;
    color: white;
}