:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #183e3a; background: #f4f7f5; }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; display: grid; place-items: center; padding: 2rem; }
main { width: min(100%, 42rem); padding: clamp(2rem, 8vw, 5rem); background: #fff; border: 1px solid #dce7e0; border-radius: 1.5rem; }
.brand { margin: 0 0 3rem; font-size: .95rem; font-weight: 700; letter-spacing: .22em; }
h1 { margin: 0 0 1rem; font-size: clamp(2rem, 6vw, 3.5rem); font-weight: 600; letter-spacing: -.04em; }
.message { margin: 0; color: #596c65; line-height: 1.65; }