/* Stone Artistry HISUI - 商品詳細ページ共通スタイル */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Cormorant Garamond", "Shippori Mincho", "Hiragino Mincho ProN", serif;
  background: #06040A; color: #E8DFCD; line-height: 1.85; overflow-x: hidden;
  font-variant-numeric: lining-nums; font-feature-settings: "lnum" 1;
}
a { color: inherit; text-decoration: none; }

/* 金粉・霧 */
.dust-layer { position: fixed; inset: 0; pointer-events: none; z-index: 1; overflow: hidden; }
.dust { position: absolute; width: 2px; height: 2px; background: #D4AF37;
  border-radius: 50%; opacity: 0; filter: blur(0.5px);
  box-shadow: 0 0 6px #D4AF37, 0 0 12px rgba(212,175,55,0.4);
  animation: float linear infinite;
}
@keyframes float {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 0.8; } 90% { opacity: 0.6; }
  100% { transform: translateY(-10vh) translateX(40px); opacity: 0; }
}
.fog {
  position: fixed; inset: 0; pointer-events: none; z-index: 2;
  background:
    radial-gradient(circle at 20% 30%, rgba(61,42,77,0.25) 0%, transparent 50%),
    radial-gradient(circle at 80% 60%, rgba(126,31,45,0.15) 0%, transparent 60%),
    radial-gradient(circle at 50% 90%, rgba(61,42,77,0.2)  0%, transparent 50%);
  animation: fogShift 25s ease-in-out infinite alternate;
}
@keyframes fogShift { 0% { transform: translate(0, 0); } 100% { transform: translate(20px, -20px); } }

/* ナビ */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 40px;
  background: rgba(6,4,10,0.78); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(184,149,106,0.15);
}
.nav-logo { font-family: "Cinzel", serif; font-size: 13px; letter-spacing: 0.35em; color: #D4AF37; text-transform: uppercase; }
.nav-back {
  font-family: "Cinzel", serif; font-size: 11px; letter-spacing: 0.3em;
  color: #B8AD99; text-transform: uppercase; transition: color 0.3s;
}
.nav-back:hover { color: #D4AF37; }

/* メインコンテナ */
main { position: relative; z-index: 3; padding: 100px 24px 0; }
.container { max-width: 1200px; margin: 0 auto; }

/* パンくず */
.breadcrumb {
  font-family: "Cinzel", serif; font-size: 10px; letter-spacing: 0.3em;
  color: #6B6258; text-transform: uppercase;
  margin-bottom: 32px; padding-bottom: 16px;
  border-bottom: 1px solid rgba(184,149,106,0.12);
}
.breadcrumb a { color: #B8956A; transition: color 0.3s; }
.breadcrumb a:hover { color: #D4AF37; }
.breadcrumb span { margin: 0 8px; color: #6B6258; }

/* 商品ヒーロー */
.product-hero {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px;
  align-items: start; margin-bottom: 100px;
}
.product-card-img {
  position: relative;
  border: 1px solid rgba(184,149,106,0.25);
  background: rgba(13,10,20,0.7);
  padding: 32px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), 0 0 60px rgba(212,175,55,0.05);
}
.product-card-img::before {
  content: ""; position: absolute; inset: 12px;
  border: 1px solid rgba(184,149,106,0.15); pointer-events: none;
}
.product-card-img img { width: 100%; height: auto; display: block; }

.product-info { padding-top: 24px; }
.product-brand {
  font-family: "Cinzel", serif; font-size: 11px;
  letter-spacing: 0.5em; color: #B8956A;
  text-transform: uppercase; margin-bottom: 16px;
}
.product-name {
  font-family: "Pinyon Script", cursive;
  font-size: 38px; color: #D4AF37;
  margin-bottom: 12px; line-height: 1.2;
}
.product-name-jp {
  font-family: "Shippori Mincho", serif;
  font-size: 18px; color: #E8DFCD;
  letter-spacing: 0.05em; margin-bottom: 32px;
  font-weight: 500;
}
.product-divider {
  width: 60px; height: 1px;
  background: linear-gradient(90deg, transparent, #B8956A, transparent);
  margin-bottom: 32px; position: relative;
}
.product-divider::before {
  content: "✦"; position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%); background: #06040A;
  padding: 0 12px; color: #B8956A; font-size: 11px;
}
.product-price {
  font-family: "Cinzel", serif;
  font-size: 36px; color: #D4AF37;
  letter-spacing: 0.1em; margin-bottom: 8px;
}
.product-stock {
  font-family: "Cinzel", serif; font-size: 11px;
  letter-spacing: 0.4em; color: #7E1F2D;
  text-transform: uppercase; margin-bottom: 36px;
}

/* CTA ボタン */
.cta-row { display: flex; flex-direction: column; gap: 12px; margin-bottom: 36px; }
.cta-btn {
  display: block; padding: 18px 32px;
  border: 1px solid rgba(184,149,106,0.4);
  background: rgba(13,10,20,0.7);
  font-family: "Cinzel", serif;
  font-size: 12px; letter-spacing: 0.3em;
  text-transform: uppercase; color: #E8DFCD;
  text-align: center; transition: all 0.4s;
  cursor: pointer; position: relative; overflow: hidden;
}
.cta-btn:hover { border-color: #D4AF37; color: #D4AF37; background: rgba(212,175,55,0.05); }
.cta-btn-primary {
  border-color: rgba(212,175,55,0.7);
  background: linear-gradient(135deg, rgba(212,175,55,0.15), rgba(184,149,106,0.05));
  color: #D4AF37;
}
.cta-btn-primary:hover { background: linear-gradient(135deg, rgba(212,175,55,0.25), rgba(184,149,106,0.1)); }
.cta-btn-soon { opacity: 0.5; cursor: not-allowed; }
.cta-btn-soon:hover { border-color: rgba(184,149,106,0.4); color: #E8DFCD; background: rgba(13,10,20,0.7); }
.cta-meta {
  font-size: 12px; color: #B8AD99;
  letter-spacing: 0.05em; line-height: 1.8;
  padding-top: 16px; border-top: 1px solid rgba(184,149,106,0.12);
}

/* 実物セクション */
.bijou-section {
  max-width: 880px; margin: 0 auto 100px; text-align: center;
}
.bijou-head { margin-bottom: 32px; }
.bijou-frame {
  position: relative; padding: 32px;
  border: 1px solid rgba(184,149,106,0.25);
  background: rgba(13,10,20,0.6);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), inset 0 0 60px rgba(184,149,106,0.04);
  display: inline-block; max-width: 100%;
}
.bijou-frame::before {
  content: ""; position: absolute; inset: 12px;
  border: 1px solid rgba(184,149,106,0.15); pointer-events: none;
}
.bijou-img { display: block; max-width: 100%; height: auto; max-height: 600px; }
.bijou-caption {
  margin-top: 24px;
  font-family: "Shippori Mincho", serif;
  font-size: 13px; color: #B8AD99;
  letter-spacing: 0.04em; line-height: 2;
}

/* 物語セクション */
.story-section {
  max-width: 760px; margin: 0 auto 100px;
  padding: 64px 48px;
  background: linear-gradient(135deg, rgba(15,10,20,0.7) 0%, rgba(20,12,28,0.7) 100%);
  border: 1px solid rgba(184,149,106,0.2);
  position: relative;
}
.story-section::before {
  content: "✦"; position: absolute;
  top: -16px; left: 50%; transform: translateX(-50%);
  background: #06040A; padding: 0 16px;
  color: #D4AF37; font-size: 16px;
}
.story-label {
  font-family: "Cinzel", serif; font-size: 10px;
  letter-spacing: 0.5em; color: #B8956A;
  text-transform: uppercase; text-align: center;
  display: block; margin-bottom: 12px;
}
.story-title-fr {
  font-family: "Pinyon Script", cursive;
  font-size: 32px; color: #D4AF37;
  text-align: center; margin-bottom: 32px;
}
.story-text {
  font-family: "Shippori Mincho", serif;
  font-size: 14px; color: #C9C2B8;
  line-height: 2.4; letter-spacing: 0.04em;
}
.story-text + .story-text { margin-top: 18px; }

/* 詳細仕様 */
.spec-section { max-width: 880px; margin: 0 auto 100px; }
.spec-head { text-align: center; margin-bottom: 48px; }
.spec-label {
  font-family: "Cinzel", serif; font-size: 10px;
  letter-spacing: 0.5em; color: #B8956A;
  text-transform: uppercase; display: block; margin-bottom: 8px;
}
.spec-title-fr { font-family: "Pinyon Script", cursive; font-size: 30px; color: #D4AF37; }
.spec-grid { display: grid; grid-template-columns: 200px 1fr; gap: 24px 40px; padding: 32px 0; }
.spec-key {
  font-family: "Cinzel", serif; font-size: 11px;
  letter-spacing: 0.3em; color: #B8956A;
  text-transform: uppercase; padding-top: 4px;
}
.spec-value {
  font-family: "Shippori Mincho", serif; font-size: 14px;
  color: #E8DFCD; line-height: 2;
}
.spec-value ul { list-style: none; padding-left: 0; }
.spec-value li { padding-left: 20px; position: relative; margin-bottom: 6px; }
.spec-value li::before {
  content: "✦"; position: absolute; left: 0;
  color: #B8956A; font-size: 9px; top: 7px;
}

/* 免責 */
.disclaimer {
  max-width: 720px; margin: 0 auto 100px;
  padding: 24px 32px;
  border-left: 2px solid rgba(126,31,45,0.5);
  background: rgba(15,10,20,0.5);
}
.disclaimer-title {
  font-family: "Cinzel", serif; font-size: 10px;
  letter-spacing: 0.4em; color: #7E1F2D;
  text-transform: uppercase; margin-bottom: 12px;
}
.disclaimer p {
  font-family: "Shippori Mincho", serif;
  font-size: 12px; color: #B8AD99;
  line-height: 2; letter-spacing: 0.02em;
}

/* 関連作品 */
.related-section { max-width: 1200px; margin: 0 auto 80px; }
.related-head { text-align: center; margin-bottom: 48px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.related-card {
  background: rgba(13,10,20,0.6);
  border: 1px solid rgba(184,149,106,0.15);
  padding: 24px; transition: all 0.4s; display: block;
}
.related-card:hover { border-color: #D4AF37; transform: translateY(-4px); }
.related-card img {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  display: block; margin-bottom: 16px;
}
.related-card-name {
  font-family: "Cinzel", serif; font-size: 11px;
  letter-spacing: 0.2em; color: #C9C2B8; margin-bottom: 6px;
}
.related-card-fr {
  font-family: "Pinyon Script", cursive;
  font-size: 18px; color: #D4AF37; margin-bottom: 8px;
}
.related-card-price {
  font-family: "Cinzel", serif; font-size: 12px;
  color: #B8956A; letter-spacing: 0.1em;
}

/* フッター */
footer {
  text-align: center; padding: 80px 20px 40px;
  font-family: "Cinzel", serif; font-size: 10px;
  color: #6B6258; letter-spacing: 0.4em;
  text-transform: uppercase; position: relative; z-index: 3;
  border-top: 1px solid rgba(184,149,106,0.15); margin-top: 60px;
}
footer .pinyon {
  font-family: "Pinyon Script", cursive;
  font-size: 22px; color: #B8956A;
  display: block; margin-bottom: 12px;
  letter-spacing: 0; text-transform: none;
}
footer .footer-links { display: flex; justify-content: center; gap: 24px; margin: 20px 0; flex-wrap: wrap; }
footer .footer-links a { color: #6B6258; transition: color 0.3s; }
footer .footer-links a:hover { color: #D4AF37; }

/* レスポンシブ */
@media (max-width: 900px) {
  .product-hero { grid-template-columns: 1fr; gap: 48px; }
  .spec-grid { grid-template-columns: 1fr; gap: 16px; }
  .related-grid { grid-template-columns: 1fr; }
}