:root{--font-sans:"Noto Sans JP",sans-serif;--font-serif:"Noto Serif JP",serif;--bg:#f5f1e7;--bg-soft:#efe8da;--surface:#fffdf8;--surface-2:#f7f1e6;--text:#2e2a25;--muted:#73695c;--line:#d8cdbb;--accent:#1b7865;--accent-strong:#155b4d;--shadow:0 16px 38px -22px rgba(44,35,24,.28)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{min-height:100vh;font-family:var(--font-sans);color:var(--text);background:radial-gradient(circle at 10% 8%,#ffffffaa 0,#ffffff00 36%),radial-gradient(circle at 85% 0,#d8f0e9 0,#d8f0e900 33%),linear-gradient(165deg,var(--bg) 0,var(--bg-soft) 100%)}a{color:inherit;text-decoration:none}code{font-family:JetBrains Mono,SFMono-Regular,Consolas,monospace;font-size:.9em;background:#fff7eb;border:1px solid #ecdcc7;border-radius:.4rem;padding:.1rem .35rem}.container{width:min(1120px,94%);margin:0 auto}.header{position:-webkit-sticky;position:sticky;top:0;z-index:20;border-bottom:1px solid 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