:root{color-scheme:light;--bg:#f5f2e9;--paper:#fffdf8;--ink:#1d2433;--muted:#5b6170;--line:#ded9cc;--navy:#233559;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",sans-serif;color:var(--ink);background:var(--bg);line-height:1.85}
*{box-sizing:border-box}body{margin:0}a{color:var(--navy);text-underline-offset:4px;overflow-wrap:anywhere}a:hover{color:#0e4b9b}a:focus-visible{outline:3px solid #587ab5;outline-offset:5px;border-radius:2px}.skip{position:absolute;left:16px;top:-80px;background:var(--paper);padding:8px 14px;z-index:2}.skip:focus{top:8px}
header{max-width:1120px;padding:20px 28px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:18px;border-bottom:1px solid var(--line)}header>a{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-weight:700;font-size:24px;letter-spacing:.06em;text-decoration:none}nav{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:14px}nav a{display:inline-flex;align-items:center;min-height:40px}
main{max-width:900px;margin:48px auto 64px;padding:40px 56px 56px;background:var(--paper);border:1px solid var(--line);border-radius:16px}h1,h2{font-family:"Hiragino Mincho ProN","Yu Mincho",serif;line-height:1.5;text-wrap:pretty}h1{font-size:clamp(27px,5vw,40px);margin:14px 0 12px;overflow-wrap:anywhere}h2{font-size:22px;margin:40px 0 12px;scroll-margin-top:28px}p{margin:0 0 16px}.date,.back{font-size:13px;color:var(--muted)}article{font-size:16px;overflow-wrap:anywhere}article li+li{margin-top:8px}
.toc{display:block;background:var(--bg);border-radius:10px;padding:18px 22px;margin:30px 0}.toc>p{font-weight:600;margin-bottom:10px}.toc ul{padding-left:20px;margin:0;columns:2;column-gap:30px}.toc li{break-inside:avoid}.toc a{min-height:34px;display:inline-flex}footer{max-width:1120px;margin:auto;padding:28px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}footer p{margin-bottom:8px}
@media(max-width:680px){header{padding:15px 20px;display:block}header nav{margin-top:8px;gap:4px 20px}header>a{font-size:22px}main{margin:20px 12px 36px;padding:24px 20px 34px;border-radius:12px}h2{font-size:20px;margin-top:32px}.toc{padding:16px}.toc ul{columns:1}footer{padding:24px 20px}footer nav{gap:4px 18px}article{font-size:15px}}