:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --accent: #f97316;
  --accent-dark: #ea580c;
  --text: #1f2937;
  --text-sub: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --ok: #16a34a;
  --ng: #dc2626;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.9;
  font-size: 16px;
}

a { color: var(--primary); }

img { max-width: 100%; height: auto; }

/* 広告表記(ステマ規制対応) */
.ad-disclosure {
  background: #eef2f7;
  color: var(--text-sub);
  font-size: 12px;
  text-align: center;
  padding: 4px 8px;
}

/* ヘッダー */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.site-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.site-logo span { color: var(--primary); }
.global-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  margin-left: 20px;
}
.global-nav a:hover { color: var(--primary); }

/* ヒーロー */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  text-align: center;
  padding: 56px 16px;
}
.hero h1 { font-size: 28px; margin-bottom: 12px; }
.hero p { font-size: 15px; opacity: 0.92; max-width: 640px; margin: 0 auto; }

/* レイアウト */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 16px;
}
main.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  background: var(--card);
}
@media (min-width: 800px) {
  main.article-body {
    margin: 24px auto 48px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 40px 48px 56px;
  }
}

/* パンくず */
.breadcrumb {
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-sub); }

/* 記事カード */
.section-title {
  font-size: 22px;
  margin: 32px 0 16px;
  padding-left: 12px;
  border-left: 5px solid var(--primary);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  display: block;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); transform: translateY(-2px); }
.card .tag {
  display: inline-block;
  font-size: 11px;
  background: #dbeafe;
  color: var(--primary-dark);
  border-radius: 4px;
  padding: 2px 8px;
  margin-bottom: 8px;
}
.card h3 { font-size: 16px; margin-bottom: 8px; line-height: 1.5; }
.card p { font-size: 13px; color: var(--text-sub); }

/* 記事本文 */
article h1 { font-size: 26px; line-height: 1.5; margin-bottom: 8px; }
.post-meta { font-size: 12px; color: var(--text-sub); margin-bottom: 24px; }
article .lead { margin-bottom: 24px; }
article h2 {
  font-size: 21px;
  margin: 48px 0 16px;
  padding: 10px 14px;
  background: #eff6ff;
  border-left: 5px solid var(--primary);
  border-radius: 0 4px 4px 0;
  line-height: 1.5;
}
article h3 {
  font-size: 18px;
  margin: 32px 0 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--border);
  line-height: 1.5;
}
article p { margin-bottom: 16px; }
article ul, article ol { margin: 0 0 16px 24px; }
article li { margin-bottom: 6px; }

/* 目次 */
.toc {
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 24px 0;
  font-size: 14px;
}
.toc strong { display: block; margin-bottom: 8px; }
.toc ol { margin: 0 0 0 20px; }

/* 比較表 */
.table-wrap { overflow-x: auto; margin: 16px 0 24px; }
table.cmp {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
  font-size: 14px;
  background: var(--card);
}
table.cmp th, table.cmp td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}
table.cmp thead th {
  background: var(--primary);
  color: #fff;
  white-space: nowrap;
}
table.cmp tbody tr:nth-child(even) { background: #f8fafc; }

/* CTA */
.cta-box {
  background: #fff7ed;
  border: 2px solid var(--accent);
  border-radius: 8px;
  padding: 20px;
  margin: 24px 0;
  text-align: center;
}
.cta-box p { font-size: 14px; margin-bottom: 12px; }
.cta-btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  padding: 14px 36px;
  border-radius: 999px;
  box-shadow: 0 3px 0 var(--accent-dark);
  transition: transform 0.1s;
}
.cta-btn:hover { transform: translateY(1px); box-shadow: 0 2px 0 var(--accent-dark); }
.cta-note { font-size: 11px; color: var(--text-sub); margin-top: 8px; }

/* メリデメ */
.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0 24px; }
@media (max-width: 640px) { .pros-cons { grid-template-columns: 1fr; } }
.pros, .cons {
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
}
.pros { background: #f0fdf4; border: 1px solid #bbf7d0; }
.cons { background: #fef2f2; border: 1px solid #fecaca; }
.pros strong { color: var(--ok); }
.cons strong { color: var(--ng); }
.pros ul, .cons ul { margin: 8px 0 0 20px; }

/* ポイントボックス */
.point-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0 24px;
  font-size: 15px;
}
.point-box strong { color: var(--primary-dark); }

/* FAQ */
.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  padding: 12px 16px;
  font-size: 15px;
}
.faq summary { font-weight: 700; cursor: pointer; }
.faq details p { margin: 10px 0 4px; }

/* 関連記事 */
.related {
  background: #f1f5f9;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 32px 0 0;
  font-size: 14px;
}
.related strong { display: block; margin-bottom: 8px; }
.related ul { margin-left: 20px; }

/* プロフィール */
.profile-box {
  display: flex;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin: 24px 0;
  font-size: 14px;
}
.profile-box .avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  flex-shrink: 0;
  display: block;
  object-fit: cover;
}

/* フッター */
.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  font-size: 13px;
  margin-top: 48px;
}
.site-footer .inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 16px;
  text-align: center;
}
.site-footer a { color: #cbd5e1; margin: 0 10px; }
.site-footer .copy { margin-top: 16px; color: #64748b; }