/* SOFI/codoAssist series - column theme */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-font-smoothing:antialiased}
body{font-family:"Hiragino Sans","Noto Sans JP","Yu Gothic UI",sans-serif;color:#222;line-height:1.85;background:#fafafa}
a{color:#1a73e8;text-decoration:none}
a:hover{color:#0a47b8;text-decoration:underline}
img{max-width:100%;height:auto}

/* Layout */
.site-header{background:#fff;border-bottom:1px solid #eee;padding:18px 0;position:sticky;top:0;z-index:100}
.site-header .inner{max-width:980px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center}
.site-header .logo{font-size:18px;font-weight:700;color:#1a1a1a;letter-spacing:.04em}
.site-header nav a{margin-left:24px;font-size:14px;color:#444}

.container{max-width:760px;margin:0 auto;padding:48px 24px}
.container.list{max-width:920px}

/* Breadcrumb */
.breadcrumb{font-size:12px;color:#888;margin-bottom:24px;letter-spacing:.05em}
.breadcrumb a{color:#666;text-decoration:none}
.breadcrumb a:hover{color:#1a73e8;text-decoration:underline}
.breadcrumb span.sep{margin:0 6px;color:#bbb}

/* Article */
.article{background:#fff;border-radius:10px;padding:48px 40px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.article-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:12px;color:#888;margin:8px 0 24px;align-items:center}
.article-cat{background:#1a1a1a;color:#fff;padding:3px 10px;border-radius:99px;font-size:11px;font-weight:600;letter-spacing:.05em}
.article-title{font-size:30px;font-weight:700;line-height:1.5;margin:0 0 16px;letter-spacing:.01em;color:#111}
.article-excerpt{color:#555;font-size:14px;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid #eee}
.article-author{display:flex;gap:12px;align-items:center;padding:14px;border:1px solid #eee;border-radius:8px;margin:24px 0;text-decoration:none;color:inherit}
.article-author:hover{background:#fafafa;text-decoration:none}
.article-author .avatar{width:48px;height:48px;border-radius:50%;background:#1a1a1a;color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.article-author .text{font-size:13px;line-height:1.55}
.article-author .text strong{font-size:15px;color:#111}
.article-author .text span{color:#888}

.article-body{font-size:16px;color:#333}
.article-body h2{font-size:22px;font-weight:700;margin:40px 0 14px;padding-bottom:8px;border-bottom:3px solid #1a1a1a;letter-spacing:.02em;color:#111}
.article-body h3{font-size:17px;font-weight:700;margin:28px 0 10px;color:#1a1a1a;border-left:4px solid #B8963E;padding-left:12px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:1.6em}
.article-body li{margin-bottom:6px}
.article-body blockquote{margin:24px 0;padding:16px 24px;border-left:4px solid #B8963E;background:#faf7f0;color:#333}
.article-body strong{color:#000;font-weight:700}

/* CTA */
.article-cta{margin-top:48px;padding:32px;background:#1a1a1a;color:#fff;border-radius:12px;text-align:center}
.article-cta h3{font-size:20px;margin:0 0 12px;color:#fff;border:none;padding:0}
.article-cta p{font-size:14px;color:#ddd;margin:0 0 20px}
.article-cta .buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.article-cta a.btn{padding:12px 28px;border-radius:6px;font-weight:600;font-size:14px;display:inline-block;text-decoration:none}
.article-cta a.btn-primary{background:#B8963E;color:#fff}
.article-cta a.btn-secondary{background:#06C755;color:#fff}
.article-cta a.btn:hover{opacity:.85;text-decoration:none}

/* Related list */
.related{margin-top:48px;padding-top:32px;border-top:1px solid #eee}
.related h3{font-size:18px;font-weight:700;margin-bottom:16px;border:none;padding:0;color:#111}
.related ul{list-style:none;padding:0}
.related li{padding:12px 0;border-bottom:1px solid #f0f0f0}
.related a{color:#222;font-weight:500}
.related a:hover{color:#1a73e8}

/* Index page */
.intro{text-align:center;padding:32px 24px 48px}
.intro h1{font-size:32px;font-weight:700;margin-bottom:12px;color:#111}
.intro p{color:#666;font-size:15px;max-width:640px;margin:0 auto}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;margin-top:24px}
.card{background:#fff;border-radius:10px;padding:24px;box-shadow:0 1px 3px rgba(0,0,0,.04);text-decoration:none;color:inherit;transition:.2s;display:block}
.card:hover{box-shadow:0 4px 12px rgba(0,0,0,.1);transform:translateY(-2px);text-decoration:none}
.card .cat{font-size:11px;color:#B8963E;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px}
.card h2{font-size:16px;font-weight:700;color:#111;line-height:1.55;margin-bottom:8px}
.card p{font-size:13px;color:#666}

/* Footer */
.site-footer{background:#1a1a1a;color:#aaa;padding:40px 24px;text-align:center;font-size:13px;margin-top:64px}
.site-footer a{color:#fff;text-decoration:underline}

@media(max-width:640px){
  .article{padding:32px 20px}
  .article-title{font-size:24px}
  .article-body h2{font-size:20px}
  .container{padding:32px 18px}
  .intro h1{font-size:24px}
}