body { font-family: Arial; background: #f8f9fa; }
header, footer { background: #343a40; color: #fff; text-align: center; padding: 10px 0; }
.container { max-width: 960px; margin: 0 auto; }
.card { border: 1px solid #dee2e6; box-shadow: 2px 2px 5px rgba(0,0,0,0.1); }