:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { margin: 0; background: #f5f5f7; color: #171927; }
main { max-width: 36rem; margin: 8vh auto; padding: 1.5rem; }
h1 { font-size: clamp(1.7rem, 5vw, 2.4rem); line-height: 1.15; }
p { line-height: 1.6; }
.eyebrow, .note { color: #52576a; font-size: .9rem; }
button { font: inherit; font-weight: 600; min-height: 48px; padding: .8rem 1.1rem;
  border: 0; border-radius: .75rem; background: #1b5dc5; color: white; cursor: pointer; }
button:disabled { opacity: .55; cursor: not-allowed; }
button:focus-visible { outline: 3px solid #a75600; outline-offset: 4px; }
#status { min-height: 3.2em; }
@media (prefers-color-scheme: dark) {
  body { background: #141722; color: #f3f5ff; }
  .eyebrow, .note { color: #b7bfd5; }
}