.card{background:var(--paper);border:1px solid rgba(0,0,0,.08);border-radius:var(--radius);padding:28px;box-shadow:0 1px 1px rgba(0,0,0,.02)}.alt .card{background:#f7f7f9}.card h3{font-size:21px;letter-spacing:-.02em;margin:0 0 10px}