* { box-sizing: border-box; }
html { background: #fff; color: #111; }
body { margin: 0; min-width: 240px; }
main { min-height: 100vh; min-height: 100svh; display: grid; place-items: center; padding: 24px; }
h1 { width: min(760px, 100%); margin: 0; font-size: 0; }
img { display: block; width: 100%; height: auto; }