:root{--ink:#18312c;--muted:#66736f;--brand:#136f63;--brand-dark:#0c5148;--brand-soft:#dff1eb;--accent:#efaa54;--paper:#f5f6f1;--surface:#fff;--line:#dfe5df;--danger:#b52b37;--shadow:0 14px 40px #1d373014;--radius-sm:12px;--radius:20px;--radius-lg:28px;color:var(--ink);background:var(--paper);font-synthesis:none;font-family:Inter,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{background:var(--paper);min-width:320px;color:var(--ink);margin:0;line-height:1.75}button,input{font:inherit}a{color:inherit}button,a{-webkit-tap-highlight-color:transparent}.shell{width:min(1120px,100% - 32px);margin-inline:auto}.skip-link{z-index:100;background:var(--ink);color:#fff;border-radius:8px;padding:10px 16px;position:fixed;top:8px;left:8px;transform:translateY(-150%)}.skip-link:focus{transform:none}.sr-only{clip:rect(0, 0, 0, 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