:root{--bg:#fbf8f1;--ink:#2b2b2b;--accent:#2f7d4f;--muted:#6b6b6b;--card:#ffffff;--line:#e7e1d4}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif;background:var(--bg);color:var(--ink);line-height:1.8}
header{background:var(--card);border-bottom:1px solid var(--line)}
.wrap{max-width:820px;margin:0 auto;padding:16px 20px}
header .wrap{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.brand{font-weight:700;text-decoration:none;color:var(--ink);font-size:1.1rem}
nav a{margin-left:16px;color:var(--accent);text-decoration:none}
h1{font-size:1.7rem;margin:24px 0 8px}
h2{font-size:1.25rem;margin:32px 0 8px;border-left:5px solid var(--accent);padding-left:10px}
h3{font-size:1.05rem;margin:20px 0 4px}
p{margin:6px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:16px 0}
.btn{display:inline-block;background:#ff0000;color:#fff;font-weight:700;padding:10px 18px;border-radius:8px;text-decoration:none}
.muted{color:var(--muted);font-size:.95rem}
footer{margin:40px 0 24px;color:var(--muted);font-size:.9rem;text-align:center}
a{color:var(--accent)}