body { font-family: Arial, sans-serif; background-color: #f7f7f7; color: #333; margin: 40px; line-height: 1.6;
}
header { text-align: center; padding-bottom: 20px; border-bottom: 1px solid #ccc;
}
h1 { color: #2c3e50;
}
section { margin-top: 40px;
}
footer { margin-top: 50px; text-align: center; color: #888; font-size: 0.9em;
}