:root { font-family: system-ui, sans-serif; color: #193a39; background: #f3f7f6; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; padding: 24px; }
main { width: min(100%, 640px); padding: clamp(24px, 6vw, 52px); background: white; border: 1px solid #dce8e4; border-radius: 24px; }
.brand { font-weight: 750; letter-spacing: .12em; color: #237367; }
.brand span { margin-left: 12px; font-size: .75rem; background: #e8f3ee; padding: 6px 10px; border-radius: 8px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); line-height: 1.2; }
p { line-height: 1.7; }
.note { margin-top: 32px; color: #536a66; font-size: .9rem; }