main{display:grid;font-family:Segoe UI,sans-serif;gap:2rem;min-height:100vh;place-content:center}header{font-size:3rem;font-weight:600;text-align:center}.counter{display:grid;place-content:center}.counter button{background:#13bd54;border:0;border-radius:1rem;color:#fff;font-family:inherit;font-size:1.5rem;padding:1rem;transition:opacity .2s}.counter button:hover{opacity:.8}