:root{color-scheme:light dark;--bg:#f5f7f2;--paper:#fff;--ink:#183d32;--muted:#47655c;--line:#d4e1d9;--accent:#176c59;--on-accent:#fff}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.85 -apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",sans-serif}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:4px}.skip{position:absolute;top:-80px;left:16px;background:var(--paper);padding:12px}.skip:focus{top:8px}header,main,footer{max-width:1040px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink);font-size:22px;font-weight:750;text-decoration:none}.brand img{border-radius:12px;width:44px;height:44px}nav{display:flex;gap:20px;flex-wrap:wrap}nav a{display:inline-flex;align-items:center;min-height:44px}.hero{padding:64px 0 44px;max-width:780px}.eyebrow{font-size:14px;font-weight:700;letter-spacing:.08em;color:var(--accent)}h1{font-size:clamp(30px,5vw,52px);line-height:1.4;letter-spacing:-.025em;margin:16px 0 24px;overflow-wrap:anywhere}h2{font-size:24px;line-height:1.5;margin:0 0 16px}h3{font-size:19px;margin:0 0 8px}p{margin:0 0 18px}.lead{font-size:20px;max-width:720px;color:var(--muted)}.muted{color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card,section.document{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:28px;margin:0 0 24px}.card p{margin-bottom:0}.document{max-width:800px}.document h2{margin-top:34px}.document h2:first-child{margin-top:0}.button{display:inline-block;border-radius:12px;background:var(--accent);color:var(--on-accent);padding:12px 20px;font-weight:650;text-decoration:none;min-height:48px}.notice{border-left:4px solid var(--accent);padding:12px 20px;margin:24px 0;background:var(--paper)}details{border-top:1px solid var(--line);padding:8px 0}summary{cursor:pointer;font-weight:650;padding:12px 0;min-height:48px}details p{padding:8px 0 12px}li{margin:8px 0}footer{border-top:1px solid var(--line);margin-top:40px;color:var(--muted);font-size:14px}footer a{display:inline-block;min-height:44px;margin-right:20px;padding:8px 0}@media(max-width:700px){.grid{grid-template-columns:1fr}.hero{padding:32px 0}header,main,footer{padding:20px}.card,section.document{padding:24px}.lead{font-size:18px}nav{gap:14px}}@media(prefers-color-scheme:dark){:root{--bg:#12231e;--paper:#1b332a;--ink:#e8f4ec;--muted:#b6cec2;--line:#385349;--accent:#a6ddc0;--on-accent:#123e31}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}