/* Add CSS styles here! */ body { font-family: Arial, Helvetica, sans-serif; } header { margin-top: 15px; display: flex; flex: 0 1 auto; justify-content: space-between; max-width: 40em; border-bottom: 1px solid #ccc; padding-bottom: 10px; } header ul { list-style: none; display: flex; padding: 0; margin: 0 10px; } header ul li { margin: 0px 10px; } .container { margin: 20px; }