:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:Noto Sans JP,Yu Gothic UI,sans-serif}*{box-sizing:border-box}body{color:#24343b;background:#f2f7f6;min-height:100vh;margin:0}.message-card{background:#fff;border:1px solid #c9dcda;border-radius:14px;width:min(92vw,620px);margin:12vh auto;padding:36px;box-shadow:0 14px 40px #183f3c1a}.message-card h1{color:#2f9187;margin-top:0;font-size:1.45rem}