body { margin: 0; background: #fff; color: #1a1a1a; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px; }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin-top: 24px; }
.note { color: #666; margin-top: 0; }
.loi { background: #fff4e5; border: 1px solid #f0c27b; padding: 10px 12px; border-radius: 6px; white-space: pre-line; }
.nut { display: inline-block; background: #1858a8; color: #fff; padding: 8px 14px; border-radius: 6px; text-decoration: none; }
button { font: inherit; padding: 4px 10px; }
ul { padding-left: 18px; }
li { margin: 4px 0; }
.nho { color: #666; font-size: 13px; }