:root{--fg:#1f2937;--bg:#ffffff;--muted:#5b6673;--line:rgba(128,128,128,.28);--accent:#1a73e8}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-size:16px;line-height:1.85;
  font-family:system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Yu Gothic",sans-serif}
a{color:var(--accent)}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
.site-header{border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px}
.site-title{font-weight:700;font-size:1.02rem;text-decoration:none;color:inherit}
.site-nav a{margin-left:16px;font-size:.88rem;text-decoration:none}
main{padding:28px 0 48px}
.post-title{font-size:1.72rem;line-height:1.45;margin:0 0 12px}
.post-meta{font-size:.82rem;color:var(--muted);margin:0 0 20px}
.post-hero{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:10px;margin:0 0 24px}
.post-list{list-style:none;margin:0;padding:0}
.post-list li{padding:18px 0;border-bottom:1px solid var(--line)}
.post-list a{font-weight:700;font-size:1.06rem;line-height:1.55;text-decoration:none}
.post-list p{margin:.4rem 0 0;font-size:.9rem;color:var(--muted);line-height:1.75}
.post-list time{display:block;font-size:.78rem;color:var(--muted);margin-bottom:4px}
.page h2{margin:2rem 0 .8rem;font-size:1.22rem}
.page p,.page li{font-size:.98rem}
.site-footer{border-top:1px solid var(--line);padding:24px 0 40px;font-size:.84rem;color:var(--muted)}
.site-footer a{color:inherit}
.site-footer nav a{margin-right:14px}
@media (max-width:520px){
  .post-title{font-size:1.36rem}
  body{font-size:15.5px}
}