body { background-color: #fff; color: #222; font: 16px/1.5 -apple-system,
BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica
Neue", Arial, sans-serif; margin: 0; }
.container { margin: 30px;
max-width: 600px; }
h1 { color: #dc3545; font-size: 24px; }
h2 { font-size:
18px; }