</body> </html>
CSS code:
body { margin: 0; font-family: Arial, sans-serif; }
header { background-color: #0071c8; color: #fff; padding: 10px; text-align: center; display: flex; flex-direction: column; align-items: center; }
header img { width: 100px; margin-bottom: 10px; }
h1 { font-size: 1.5rem; margin-top: 0; }
.container { padding: 10px; max-width: 400px; margin: 0 auto; }
p { line-height: 1.5; }
.alert { background-color: #e74c3c; color: #fff; padding: 10px; margin-bottom: 10px; border-radius: 5px; }
.alert p { margin: 0; }
@media only screen and (max-width: 600px) { h1