:root{--ink:#14213d;--muted:#65708a;--line:#e5e8ef;--surface:#fff;--canvas:#f5f7fb;--accent:#f26b38;--accent-dark:#ce4c1c;--teal:#1d9b8a;--yellow:#e9b949;--danger:#c54848;--shadow:0 18px 50px #14213d14}*{box-sizing:border-box}html{background:var(--canvas)}body{color:var(--ink);background:var(--canvas);margin:0;font-family:Noto Sans JP,Hiragino Kaku Gothic ProN,Meiryo,system-ui,sans-serif}button,input{font:inherit}a{color:inherit}.public-shell{background:radial-gradient(circle at 85% 8%,#fff0df 0,#0000 30%),linear-gradient(135deg,#f8fbff 0%,#f8f5ef 100%);place-items:center;min-height:100vh;padding:32px 18px;display:grid}.public-card{width:min(760px,100%);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe0;border:1px solid #ffffffe6;border-radius:28px;padding:66px clamp(24px,7vw,76px) 42px}.public-card.narrow{width:min(570px,100%)}.brand-mark{color:#fff;background:var(--ink);border-radius:18px 18px 18px 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