:root{font-family:system-ui,sans-serif;color:#19263b;background:#f3f6fa;color-scheme:light}
body{margin:0;padding:28px 20px}main{box-sizing:border-box;max-width:520px;margin:8vh auto;padding:28px;background:white;border-radius:18px;border:1px solid #dce3eb}
.brand{color:#236942;font-weight:700;margin:0 0 20px}h1{font-size:clamp(1.5rem,5vw,2rem);line-height:1.2}p{line-height:1.6}.detail{color:#526277;font-size:.95rem}