:root { color-scheme: light; font-family: system-ui, sans-serif; color: #243349; background: #f4f6f9; }
body { margin: 0; min-height: 100svh; display: grid; place-items: center; }
main { box-sizing: border-box; width: min(42rem, calc(100% - 2rem)); padding: clamp(1.5rem, 5vw, 3rem); background: white; border: 1px solid #dce2ea; border-radius: 1rem; }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); line-height: 1.2; margin: 0 0 1rem; }
p { font-size: 1.05rem; line-height: 1.6; margin: 0; }