:root{color-scheme:light;font-family:Arial,Noto Sans SC,sans-serif;background:#f5f7f4;color:#18392f}*{box-sizing:border-box}body,html{min-height:100%}body{margin:0}.bootstrap-page{min-height:100vh;display:grid;place-items:center;padding:24px}.bootstrap-card{width:min(100%,560px);padding:40px;border:1px solid #d8e2dc;border-radius:12px;background:#ffffff}.brand{margin:0 0 12px;color:#287057;font-size:1rem;font-weight:700}h1{margin:0 0 16px;font-size:clamp(2rem,7vw,3.5rem);line-height:1.1}.bootstrap-card>p:last-child{margin:0;color:#53675f;font-size:1rem;line-height:1.6}@media (max-width:480px){.bootstrap-card{padding:28px}}