*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #a34a0f;
  --primary-dark: #6e3007;
  --accent: #2a7a4b;
  --bg: #faf7f2;
  --card-bg: #ffffff;
  --text: #3a2e23;
  --muted: #86776b;
  --border: #ece3dd;
}
body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.9;
}
.container { max-width: 860px; margin: 0 auto; padding: 0 16px; }

.site-header { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: #fff; padding: 28px 0 20px; }
.site-title { color: #fff; text-decoration: none; font-size: 1.7rem; font-weight: 700; letter-spacing: 0.05em; }
.site-tagline { font-size: 0.85rem; opacity: 0.85; margin-top: 4px; }

.site-nav { background: #fff; border-bottom: 1px solid var(--border); overflow-x: auto; }
.site-nav .container { display: flex; gap: 4px; padding: 0 8px; white-space: nowrap; }
.site-nav a { display: inline-block; padding: 12px 14px; color: var(--text); text-decoration: none; font-size: 0.9rem; font-weight: 600; }
.site-nav a:hover { color: var(--primary); }

.ad-disclosure { font-size: 0.72rem; color: var(--muted); padding-top: 10px; }

main { padding: 24px 16px 48px; }

.hero { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 28px; margin-bottom: 32px; }
.hero h1 { font-size: 1.5rem; color: var(--primary-dark); margin-bottom: 8px; }
.hero p { font-size: 0.95rem; color: var(--muted); }

.section-title { font-size: 1.25rem; margin: 24px 0 16px; padding-left: 12px; border-left: 5px solid var(--primary); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.card { display: block; background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 18px; text-decoration: none; color: var(--text); transition: box-shadow 0.2s, transform 0.2s; }
.card:hover { box-shadow: 0 6px 18px rgba(11, 94, 138, 0.15); transform: translateY(-2px); }
.card-category { display: inline-block; background: var(--primary); color: #fff; font-size: 0.7rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin-bottom: 8px; }
.card-title { font-size: 1rem; line-height: 1.6; margin-bottom: 8px; }
.card-desc { font-size: 0.82rem; color: var(--muted); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-date { font-size: 0.75rem; color: var(--muted); }

.article { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 28px; }
.article h1 { font-size: 1.5rem; line-height: 1.6; margin: 10px 0 6px; color: var(--primary-dark); }
.article-date { font-size: 0.8rem; color: var(--muted); }
.article-body { margin-top: 20px; }
.article-body h2 { font-size: 1.2rem; margin: 32px 0 14px; padding: 8px 12px; background: #f8f1ee; border-left: 5px solid var(--primary); border-radius: 4px; }
.article-body h3 { font-size: 1.05rem; margin: 24px 0 10px; padding-bottom: 4px; border-bottom: 2px solid var(--border); }
.article-body p { margin-bottom: 14px; }
.article-body ul, .article-body ol { margin: 0 0 14px 1.5em; }
.article-body table { width: 100%; border-collapse: collapse; margin-bottom: 16px; font-size: 0.9rem; display: block; overflow-x: auto; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.article-body th { background: #f8f1ee; }
.article-body blockquote { border-left: 4px solid var(--accent); background: #fdf6e3; padding: 10px 16px; margin-bottom: 14px; border-radius: 4px; }

.product-box { border: 2px solid var(--accent); border-radius: 10px; padding: 18px; margin: 20px 0; background: #fffdf5; }
.product-name { font-weight: 700; font-size: 1.02rem; margin-bottom: 6px; }
.product-note { font-size: 0.85rem; color: var(--muted); margin-bottom: 10px; }
.product-links { display: flex; gap: 10px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 6px; color: #fff; text-decoration: none; font-size: 0.88rem; font-weight: 700; }
.btn-amazon { background: #ff9900; }
.btn-amazon:hover { background: #e68a00; }
.btn-rakuten { background: #bf0000; }
.btn-rakuten:hover { background: #a30000; }

.related { margin-top: 36px; }
.related h2 { font-size: 1.15rem; margin-bottom: 14px; padding-left: 12px; border-left: 5px solid var(--primary); }

.site-footer { background: var(--primary-dark); color: #eedccf; padding: 24px 0; font-size: 0.82rem; text-align: center; }
.site-footer a { color: #fff; }

@media (max-width: 600px) {
  .article { padding: 20px 16px; }
  .card-grid { grid-template-columns: 1fr; }
}