:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #21352d;
  background: #f7faf7;
}

* { box-sizing: border-box; }
body { margin: 0; background: #f7faf7; }
main { min-height: 100vh; padding: 40px 20px; }
article { max-width: 720px; margin: 0 auto; }
header { padding-bottom: 36px; border-bottom: 1px solid #d8e4dc; }
.brand { margin: 0; color: #27735a; font-size: 14px; font-weight: 800; letter-spacing: .18em; }
h1 { margin: 20px 0 0; font-size: clamp(2.25rem, 6vw, 3.4rem); line-height: 1.05; letter-spacing: -.035em; }
.subtitle { margin: 16px 0 0; color: #4d685c; font-size: 1.125rem; line-height: 1.6; }
section { margin: 40px 0; color: #40584d; font-size: 1.05rem; line-height: 1.85; }
h2 { margin: 0; color: #21352d; font-size: 1.25rem; line-height: 1.35; }
p { margin: 12px 0 0; }
a { color: #1d684e; text-underline-offset: 4px; }
.notice { padding: 24px; border: 1px solid #b9d9c8; border-radius: 16px; background: #edf7f0; }
footer { padding: 28px 0; border-top: 1px solid #d8e4dc; color: #60786c; font-size: .875rem; }
@media (min-width: 640px) { main { padding: 64px 32px; } }