/* rusuban.ai — column / report 共通スタイル（静的・JS不要） */
:root{
  --navy:#1f3157;
  --navy-2:#344c7a;
  --coral:#ee806c;
  --coral-soft:#ffd9cf;
  --cream:#fffaf4;
  --ink:#293756;
  --muted:#6d7890;
  --line:#e4e5ea;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:#fff;
  color:var(--ink);
  font-family:"Hiragino Maru Gothic ProN","Hiragino Kaku Gothic ProN","Yu Gothic Medium","Yu Gothic",YuGothic,Meiryo,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  overflow-wrap:break-word;
}
a{color:var(--navy-2)}
a:hover{color:var(--coral)}
img{max-width:100%;height:auto}

/* ---------- ヘッダー ---------- */
.site-header{background:var(--navy)}
.site-header .inner{
  max-width:42rem;margin:0 auto;padding:.75rem 1rem;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap;
}
.site-header .logo{
  color:#fff;text-decoration:none;font-weight:700;
  font-size:1.15rem;letter-spacing:.08em;
}
.site-header nav{display:flex;gap:1rem}
.site-header nav a{color:#fff;text-decoration:none;font-size:.85rem;opacity:.92}
.site-header nav a:hover{opacity:1;color:var(--coral-soft)}
.site-note{background:var(--cream);border-bottom:1px solid var(--line)}
.site-note .inner{
  max-width:42rem;margin:0 auto;padding:.45rem 1rem;
  color:var(--muted);font-size:.78rem;line-height:1.6;
}

/* ---------- レイアウト ---------- */
main{max-width:42rem;margin:0 auto;padding:1.5rem 1rem 3.5rem}
.breadcrumb{font-size:.78rem;color:var(--muted);margin:0 0 1.2rem}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.3rem}
.breadcrumb li+li::before{content:"›";margin-right:.3rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}

/* ---------- 記事 ---------- */
article > header h1,.page-title{
  font-size:1.45rem;line-height:1.55;color:var(--navy);margin:.2rem 0 .7rem;
}
.meta{font-size:.8rem;color:var(--muted);margin:0 0 .5rem}
.lede{color:var(--ink);margin:0 0 1.4rem}
h2{
  font-size:1.18rem;line-height:1.6;color:var(--navy);
  margin:2.8rem 0 1rem;padding:.5rem .9rem;
  border-left:4px solid var(--coral);background:var(--cream);border-radius:0 6px 6px 0;
}
h3{font-size:1.02rem;color:var(--navy);margin:1.8rem 0 .6rem}
p{margin:0 0 1.15rem}
ul,ol{padding-left:1.5rem;margin:0 0 1.2rem}
li{margin-bottom:.45rem}
strong{color:var(--navy)}
blockquote{margin:0 0 1.2rem;padding:.6rem 1rem;border-left:3px solid var(--line);color:var(--muted)}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
sup{font-size:.72em;line-height:1}
sup a{text-decoration:none}

/* 直答（H2直下の要約） */
.answer{
  background:var(--coral-soft);border-radius:8px;
  padding:.85rem 1rem;margin:0 0 1.2rem;font-weight:700;line-height:1.8;
}
.answer::before{
  content:"直答";display:inline-block;background:var(--coral);color:#fff;
  font-size:.72rem;font-weight:700;border-radius:4px;padding:.1rem .55rem;
  margin-right:.6rem;vertical-align:.12em;letter-spacing:.05em;
}

/* 注意・免責 */
.note,.disclaimer{
  background:var(--cream);border:1px solid var(--line);border-radius:8px;
  padding:1rem 1.1rem;margin:0 0 1.4rem;font-size:.88rem;color:var(--muted);
}
.disclaimer h2,.disclaimer h3,.note h3{
  margin:0 0 .5rem;padding:0;border:0;background:none;
  font-size:.95rem;color:var(--navy);
}
.disclaimer ul{margin-bottom:0}

/* ---------- 表 ---------- */
.table-wrap{overflow-x:auto;margin:0 0 1.4rem;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.88rem;line-height:1.7}
caption{caption-side:top;text-align:left;font-size:.8rem;color:var(--muted);padding-bottom:.4rem}
th,td{border:1px solid var(--line);padding:.55rem .7rem;text-align:left;vertical-align:top}
thead th{background:var(--navy);color:#fff;font-weight:700;white-space:nowrap}
tbody th{background:var(--cream);font-weight:700;white-space:nowrap}
tbody tr:nth-child(even) td{background:var(--cream)}

/* チェックリスト */
.checklist{list-style:none;padding-left:0;counter-reset:chk}
.checklist>li{
  counter-increment:chk;position:relative;
  border:1px solid var(--line);border-radius:8px;
  padding:.8rem 1rem .8rem 3rem;margin-bottom:.7rem;background:#fff;
}
.checklist>li::before{
  content:counter(chk);position:absolute;left:.85rem;top:.85rem;
  width:1.55rem;height:1.55rem;border-radius:50%;
  background:var(--navy);color:#fff;font-size:.8rem;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}

/* ---------- 目次 ---------- */
.toc{background:var(--cream);border:1px solid var(--line);border-radius:8px;padding:1rem 1.2rem;margin:0 0 2rem}
.toc h2{margin:0 0 .5rem;padding:0;border:0;background:none;font-size:1rem}
.toc ol{margin:0;padding-left:1.4rem;font-size:.9rem}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}

/* ---------- 出典 ---------- */
.sources{font-size:.82rem;color:var(--muted)}
.sources ol{padding-left:1.6rem}
.sources li{margin-bottom:.35rem}
.sources a{word-break:break-all}

/* ---------- 著者ボックス ---------- */
.author-box{
  display:flex;gap:.9rem;align-items:flex-start;
  border:1px solid var(--line);border-radius:10px;background:var(--cream);
  padding:1rem 1.1rem;margin:2.5rem 0 1.5rem;font-size:.88rem;
}
.author-box .avatar{
  flex:none;width:2.8rem;height:2.8rem;border-radius:50%;
  background:var(--navy);color:#fff;font-weight:700;
  display:flex;align-items:center;justify-content:center;letter-spacing:.05em;
}
.author-box p{margin:0}
.author-box .author-name{font-weight:700;color:var(--navy)}

/* ---------- CTA ---------- */
.cta{
  border:1px solid var(--line);border-radius:10px;background:var(--cream);
  padding:1.3rem 1.2rem;margin:2rem 0;text-align:center;
}
.cta p{margin:0 0 .9rem;font-size:.92rem}
.cta .btn{
  display:inline-block;background:var(--coral);color:#fff;text-decoration:none;
  font-weight:700;padding:.75rem 1.6rem;border-radius:999px;font-size:.95rem;
}
.cta .btn:hover{background:var(--navy-2);color:#fff}
.cta .cta-sub{margin:.7rem 0 0;font-size:.78rem;color:var(--muted)}

/* 記事末の関連リンク */
.further{border-top:1px solid var(--line);padding-top:1.2rem;margin-top:2rem;font-size:.9rem}
.further h2{margin-top:0}

/* ---------- コラム一覧カード ---------- */
.card-list{list-style:none;padding:0;margin:0 0 2rem;display:grid;gap:1rem}
.card{border:1px solid var(--line);border-radius:10px;background:#fff;transition:border-color .15s}
.card:hover{border-color:var(--coral)}
.card a{display:block;padding:1.1rem 1.2rem;text-decoration:none;color:inherit}
.card .card-label{
  display:inline-block;background:var(--navy);color:#fff;font-size:.7rem;
  border-radius:4px;padding:.1rem .55rem;margin-bottom:.5rem;letter-spacing:.05em;
}
.card h2,.card h3{
  margin:0 0 .45rem;padding:0;border:0;background:none;
  font-size:1.05rem;line-height:1.6;color:var(--navy);
}
.card p{margin:0;font-size:.85rem;color:var(--muted)}
.card .card-date{display:block;margin-top:.5rem;font-size:.75rem;color:var(--muted)}
.card--report{background:var(--cream)}

/* ---------- フッター ---------- */
.site-footer{background:var(--navy);color:#fff;margin-top:2rem}
.site-footer .inner{max-width:42rem;margin:0 auto;padding:1.6rem 1rem 2rem;font-size:.8rem}
.site-footer p{margin:0 0 .5rem;opacity:.9}
.site-footer nav{display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;margin-bottom:.8rem}
.site-footer a{color:#fff}
.site-footer a:hover{color:var(--coral-soft)}
.site-footer .copyright{opacity:.7;letter-spacing:.05em}

@media (min-width:600px){
  article > header h1,.page-title{font-size:1.6rem}
}