:root{--bg:#fff;--paper:#f2f3f0;--card:#f9faf7;--ink:#1f2a30;--muted:#5f6a6f;--accent:#8fb1b0;--accent-soft:#e3ecea;--line:#27333a;--line-soft:#d7dbd4;--warning:#9b5b00;--fail:#b42318;--focus:#8fb1b085;--offset-shadow:6px 6px 0 #1f2a301f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);font-feature-settings:"rlig" 1, "calt" 1;margin:0;font-family:SF Pro JP,SF Pro Display,SF Pro Text,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select{font:inherit}button,a,input,select,summary{outline-color:var(--line)}.page{min-height:100vh;overflow:hidden}.site-header{border-bottom:1px solid var(--line-soft);background:#ffffffeb;justify-content:space-between;align-items:center;gap:16px;min-height:82px;padding:18px 32px;display:flex}.brand,.nav-link{color:var(--ink);text-decoration:none}.brand{background:#fff;border:1px solid #2d2d2d;align-items:center;gap:8px;min-height:56px;padding:8px 12px;transition:transform 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