:root { color-scheme: light dark; font-family: system-ui, sans-serif; background: #101917; color: #eef7f4; }
body { margin: 0; min-height: 100svh; display: grid; place-items: center; }
main { max-width: 32rem; padding: 2rem; }
.brand { color: #83d5c9; font-weight: 650; }
h1 { font-size: clamp(2rem, 6vw, 3rem); line-height: 1.1; letter-spacing: -.04em; }
p { line-height: 1.65; }
.secondary { color: #b5c6c0; font-size: .95rem; }
.button { display: block; margin: 2rem 0; padding: 1rem; border-radius: .8rem; color: #06372f; background: #83d5c9; font-weight: 650; text-align: center; text-decoration: none; }
[hidden] { display: none !important; }
.button:focus-visible { outline: 3px solid white; outline-offset: 4px; }