/* =================================================================
   お客様事例 — 索引 + 詳細
   ================================================================= */
.case-study-index,
.case-study-page {
  --brand: #c8102e;
  --text: #222;
  --text-muted: #666;
  --border: #e8e8e8;
  --bg-soft: #faf7f5;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  color: var(--text);
}
.case-study-index .container,
.case-study-page .container {
  padding: 32px 20px 60px;
  max-width: 960px;
}

/* ── 索引ヘッダー ── */
.case-header { margin: 16px 0 32px; }
.case-h1 {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 12px;
}
.case-lead {
  background: var(--bg-soft);
  padding: 18px 22px;
  border-left: 4px solid var(--brand);
  border-radius: 0 6px 6px 0;
  font-size: 14px;
  line-height: 1.85;
  color: #444;
  margin: 0;
}

/* ── カードグリッド ── */
.case-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.case-card {
  display: block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.case-card:hover {
  border-color: var(--brand);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 16, 46, 0.08);
}
.case-card-image img { display: block; }
.case-card-body { padding: 16px; }
.case-card-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.case-card-meta span {
  background: var(--bg-soft);
  padding: 2px 8px;
  border-radius: 3px;
}
.case-card-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
  line-height: 1.5;
  color: var(--text);
}
.case-card-summary {
  font-size: 13px;
  color: #555;
  line-height: 1.7;
  margin: 0 0 12px;
}
.case-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.case-card-rating {
  color: var(--brand);
  font-size: 13px;
  letter-spacing: 1px;
}
.case-card-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.case-card-tags span {
  font-size: 10px;
  background: var(--bg-soft);
  color: #555;
  padding: 2px 8px;
  border-radius: 10px;
}

/* =================================================================
   詳細ページ
   ================================================================= */
.case-detail-header { margin: 16px 0 24px; }
.case-detail-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.case-detail-meta span {
  background: var(--bg-soft);
  padding: 3px 10px;
  border-radius: 3px;
}
.case-detail-title {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 10px;
  line-height: 1.4;
}
.case-detail-rating {
  color: var(--brand);
  font-size: 18px;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.case-detail-rating small {
  color: var(--text-muted);
  margin-left: 8px;
  font-size: 12px;
}
.case-detail-header time {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
}

.case-summary-box {
  background: var(--bg-soft);
  padding: 18px 22px;
  border-left: 4px solid var(--brand);
  border-radius: 0 6px 6px 0;
  margin: 24px 0 32px;
}
.case-summary-box strong {
  display: block;
  font-size: 11px;
  color: var(--brand);
  letter-spacing: 0.15em;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.case-summary-box p {
  font-size: 14px;
  line-height: 1.85;
  color: #333;
  margin: 0;
}

.case-body {
  font-size: 15px;
  line-height: 1.95;
  color: #333;
  margin: 0 0 36px;
}
.case-body p {
  margin: 0 0 16px;
}
.case-body strong { color: #111; }

/* ── 購入商品カード ── */
.case-h2 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 14px;
  padding: 6px 0 6px 14px;
  border-left: 4px solid var(--brand);
}
.case-product-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s;
}
@media (max-width: 480px) { .case-product-card { grid-template-columns: 1fr; } }
.case-product-card:hover { border-color: var(--brand); }
.case-product-card strong {
  display: block;
  font-size: 14px;
  line-height: 1.55;
  margin: 0 0 8px;
}
.case-product-price {
  font-size: 18px;
  color: var(--brand);
  font-weight: 700;
  margin: 0 0 10px;
}
.case-product-card span {
  font-size: 12px;
  color: var(--brand);
}

/* ── タグ ── */
.case-tags-section { margin: 28px 0; }
.case-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.case-tags span {
  background: var(--bg-soft);
  color: #555;
  padding: 4px 12px;
  border-radius: 14px;
  font-size: 12px;
}

.case-back {
  text-align: center;
  margin: 40px 0 0;
}
.case-back a {
  color: var(--brand);
  font-size: 13px;
  text-decoration: none;
  font-weight: 600;
}
.case-back a:hover { text-decoration: underline; }