body{font-family:system-ui,sans-serif;margin:0;color:#1f2933;background:#f7f7f5;line-height:1.55}
header{background:#2f4858;color:#fff;padding:16px 24px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
header a{color:#fff;text-decoration:none}.brand{font-weight:700;font-size:1.2rem}nav a{margin-left:16px}
main{max-width:760px;margin:32px auto;padding:0 16px}footer{text-align:center;color:#6b7280;font-size:.85rem;padding:32px 16px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:16px 20px;margin:16px 0}