:root { font-family: system-ui, sans-serif; color: #172b3a; background: #f2f5f7; }
main { max-width: 680px; margin: 3rem auto; padding: 2rem; background: white; border-radius: 16px; }
h1 { font-size: 2rem; line-height: 1.25; }
p { line-height: 1.7; }
label { display: block; margin-top: 1.2rem; }
input { display: block; box-sizing: border-box; width: 100%; padding: .8rem; margin: .4rem 0; font: inherit; }
button { margin-top: 1.2rem; padding: .9rem 1.3rem; background: #155e75; color: white; border: 0; border-radius: 6px; font: inherit; }
button:disabled { opacity: .5; }
:focus-visible { outline: 3px solid #da9700; outline-offset: 3px; }
@media (max-width: 720px) { main { margin: 1rem; padding: 1.2rem; } }