:root{--ink:#13231b;--muted:#5f6f66;--line:#dbe4de;--paper:#f7faf8;--surface:#fff;--accent:#147a4a;--accent-dark:#0e5b37;--accent-soft:#e5f4ec;--danger:#b42318;--radius:18px;--shadow:0 12px 38px #13231b14;color:var(--ink);background:var(--paper);font-synthesis:none;font-family:Inter,Hiragino Kaku Gothic ProN,Yu Gothic,Meiryo,system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.7}a{color:var(--accent-dark);text-underline-offset:.18em}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit}img{max-width:100%}.container{width:min(1120px,100% - 32px);margin-inline:auto}.narrow{width:min(760px,100% - 32px);margin-inline:auto}.skip-link{z-index:100;background:var(--ink);color:#fff;border-radius:8px;padding:10px 14px;position:fixed;top:-80px;left:16px}.skip-link:focus{top:16px}.site-header{z-index:50;backdrop-filter:blur(12px);background:#f7faf8eb;border-bottom:1px solid 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