/* =====================
   ROYAL HONEY JAPAN - OMAGE SITE
   オリジナルCSS
   ===================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inria+Serif:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&family=Italianno&display=swap');

/* =====================
   CSS Variables
   ===================== */
:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gold: #C8A87A;
  --color-gold-dark: #A88B5A;
  --color-cream: #F8F5F0;
  --color-gray: #888888;
  --color-light-gray: #f2f2f2;
  --color-dark: #1a1a1a;
  --color-text: #333333;
  --font-serif: 'Inria Serif', serif;
  --font-italic: 'Italianno', cursive;
  --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: all 0.3s ease;
  --shadow: 0 2px 10px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
}

/* =====================
   Reset & Base
   ===================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  line-break: strict;
  overflow-wrap: break-word;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

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

ul {
  list-style: none;
}

/* =====================
   Placeholder Image (Black)
   ===================== */
.img-placeholder {
  background-color: var(--color-black);
  display: block;
  width: 100%;
}

.img-placeholder-hero {
  width: 100%;
  aspect-ratio: 375 / 250;
  background-color: var(--color-black);
}

.img-placeholder-product {
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--color-black);
}

.img-placeholder-rank {
  width: 80px;
  height: 80px;
  background-color: var(--color-black);
  flex-shrink: 0;
}

.img-placeholder-component {
  width: 60px;
  height: 60px;
  background-color: var(--color-black);
  border-radius: 50%;
}

.img-placeholder-banner {
  width: 100%;
  aspect-ratio: 375 / 120;
  background-color: var(--color-black);
}

.img-placeholder-about {
  width: 100%;
  aspect-ratio: 375 / 280;
  background-color: var(--color-black);
}

/* =====================
   Header
   ===================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid #e8e8e8;
  padding: 0 16px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hamburger-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}

.hamburger-btn span {
  display: block;
  height: 2px;
  background-color: var(--color-black);
  transition: var(--transition);
  border-radius: 2px;
}

.hamburger-btn.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-black);
  line-height: 1.2;
  text-align: center;
}

.site-logo span {
  display: block;
  font-size: 9px;
  font-weight: 300;
  letter-spacing: 0.12em;
  color: var(--color-gray);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  position: relative;
  color: var(--color-black);
}

.header-icon-btn svg {
  width: 20px;
  height: 20px;
}

.cart-badge {
  position: absolute;
  top: -2px;
  right: -4px;
  background-color: var(--color-black);
  color: var(--color-white);
  font-size: 9px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* =====================
   Mobile Navigation Drawer
   ===================== */
.nav-drawer {
  position: fixed;
  top: 60px;
  left: -100%;
  width: 80%;
  max-width: 320px;
  height: calc(100vh - 60px);
  background-color: var(--color-white);
  z-index: 999;
  overflow-y: auto;
  transition: left 0.35s ease;
  box-shadow: 4px 0 20px rgba(0,0,0,0.12);
}

.nav-drawer.open {
  left: 0;
}

.nav-overlay {
  position: fixed;
  top: 60px;
  left: 0;
  width: 100%;
  height: calc(100vh - 60px);
  background-color: rgba(0,0,0,0.5);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.nav-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.nav-drawer-menu {
  padding: 20px 0;
}

.nav-drawer-menu li {
  border-bottom: 1px solid #f0f0f0;
}

.nav-drawer-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-dark);
}

.nav-drawer-menu a:hover {
  background-color: var(--color-cream);
  color: var(--color-gold-dark);
}

.nav-arrow {
  font-size: 10px;
  color: var(--color-gray);
}

/* Desktop Nav */
.desktop-nav {
  display: none;
}

/* =====================
   Hero Banner
   ===================== */
.hero-section {
  position: relative;
  overflow: hidden;
}

.hero-badge {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(0,0,0,0.75);
  color: var(--color-gold);
  font-family: var(--font-serif);
  font-size: 11px;
  letter-spacing: 0.15em;
  padding: 8px 24px;
  border: 1px solid var(--color-gold);
  white-space: nowrap;
  text-transform: uppercase;
}

/* =====================
   Section Common
   ===================== */
.section-header {
  text-align: center;
  padding: 40px 16px 24px;
}

.section-title-en {
  font-family: var(--font-italic);
  font-size: 36px;
  color: var(--color-black);
  line-height: 1;
  margin-bottom: 4px;
}

.section-title-ja {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--color-gray);
  text-transform: uppercase;
}

.section-divider {
  width: 40px;
  height: 1px;
  background-color: var(--color-gold);
  margin: 12px auto;
}

/* =====================
   PICK UP - Product Cards
   ===================== */
.pickup-section {
  background-color: var(--color-white);
  padding-bottom: 40px;
}

.pickup-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background-color: #e8e8e8;
  margin: 0 0;
}

.product-card {
  background-color: var(--color-white);
  overflow: hidden;
}

.product-card-image {
  position: relative;
  overflow: hidden;
}

.product-card-image .img-placeholder-product {
  transition: transform 0.4s ease;
}

.product-card:hover .img-placeholder-product {
  transform: scale(1.03);
}

.product-card-body {
  padding: 12px 12px 16px;
}

.product-card-name {
  font-family: var(--font-serif);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 4px;
  letter-spacing: 0.03em;
  line-height: 1.4;
}

.product-card-sub {
  font-size: 10px;
  color: var(--color-gray);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.product-card-price {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.product-card-price .tax {
  font-size: 10px;
  font-weight: 400;
  color: var(--color-gray);
}

.btn-buy {
  display: block;
  width: 100%;
  padding: 9px 8px;
  background-color: var(--color-black);
  color: var(--color-white);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-align: center;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-buy:hover {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.btn-view-all {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 24px auto 0;
  padding: 14px 32px;
  border: 1px solid var(--color-black);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-black);
  background: transparent;
  cursor: pointer;
  transition: var(--transition);
  max-width: 240px;
}

.btn-view-all:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}


/* =====================
   Ranking Section
   ===================== */
.ranking-section {
  background-color: var(--color-white);
  padding-bottom: 40px;
}

.ranking-list {
  padding: 0 16px;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #f0f0f0;
  cursor: pointer;
  transition: var(--transition);
}

.rank-item:hover {
  background-color: var(--color-cream);
  margin: 0 -16px;
  padding: 12px 16px;
}

.rank-number {
  font-family: var(--font-italic);
  font-size: 28px;
  color: var(--color-black);
  width: 36px;
  text-align: center;
  flex-shrink: 0;
  line-height: 1;
}

.rank-number.top3 {
  color: var(--color-gold-dark);
}

.rank-info {
  flex: 1;
  min-width: 0;
}

.rank-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rank-sub {
  font-size: 10px;
  color: var(--color-gray);
}

.rank-arrow {
  color: var(--color-gray);
  font-size: 12px;
  flex-shrink: 0;
}

/* =====================
   About Section
   ===================== */
.about-section {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding-bottom: 40px;
}

.about-section .section-title-en {
  color: var(--color-white);
}

.about-section .section-title-ja {
  color: rgba(255,255,255,0.5);
}

.about-text {
  padding: 0 24px;
  font-size: 13px;
  line-height: 2;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.05em;
}

.about-catchphrase {
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.8;
  color: var(--color-white);
  padding: 24px 24px 16px;
  border-left: 2px solid var(--color-gold);
  margin: 16px;
}

/* モバイルのみ表示する改行 */
.sp-br { display: block; }
@media (min-width: 768px) { .sp-br { display: none; } }

/* =====================
   About Features
   ===================== */
.about-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 32px 0 0;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.about-feature-item {
  padding: 28px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
}

.about-feature-icon {
  width: 56px;
  height: 56px;
  border: 1px solid rgba(200,168,122,0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}

.about-feature-title {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.about-feature-text {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  letter-spacing: 0.04em;
}

/* About Stats */
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: rgba(255,255,255,0.1);
  margin: 32px 0 0;
}

.about-stat-item {
  background-color: var(--color-dark);
  padding: 24px 12px;
  text-align: center;
}

.about-stat-number {
  font-family: var(--font-italic);
  font-size: 32px;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: 8px;
}

.about-stat-unit {
  font-size: 18px;
}

.about-stat-label {
  font-size: 10px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.1em;
}

/* =====================
   History Section
   ===================== */
.history-section {
  background-color: var(--color-cream);
  padding-bottom: 48px;
}

.history-list {
  padding: 0 24px;
  position: relative;
}

.history-list::before {
  content: '';
  position: absolute;
  left: 44px;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: var(--color-gold);
  opacity: 0.3;
}

.history-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  position: relative;
}

.history-year {
  font-family: var(--font-italic);
  font-size: 20px;
  color: var(--color-gold-dark);
  width: 48px;
  flex-shrink: 0;
  padding-top: 2px;
  position: relative;
  z-index: 1;
}

.history-year::after {
  content: '';
  position: absolute;
  right: -14px;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-gold);
}

.history-content {
  flex: 1;
  padding-left: 12px;
}

.history-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}

.history-text {
  font-size: 12px;
  color: var(--color-gray);
  line-height: 1.8;
}

@media (min-width: 768px) {
  .about-features {
    grid-template-columns: repeat(3, 1fr);
    margin: 40px 24px 0;
    border: 1px solid rgba(255,255,255,0.1);
  }

  .about-feature-item {
    border-bottom: none;
    border-right: 1px solid rgba(255,255,255,0.1);
    padding: 36px 20px;
  }

  .about-feature-item:last-child {
    border-right: none;
  }

  .history-list {
    max-width: 700px;
    margin: 0 auto;
  }
}

/* =====================
   Component Section
   ===================== */
.component-section {
  background-color: var(--color-cream);
  padding-bottom: 48px;
}

.component-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px 12px;
  padding: 0 20px;
}

.component-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.component-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.component-name {
  font-size: 10px;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.03em;
  line-height: 1.4;
}

.component-name-en {
  font-size: 9px;
  color: var(--color-gray);
  letter-spacing: 0.05em;
}

/* =====================
   Information Banners
   ===================== */
.info-section {
  background-color: var(--color-white);
  padding: 32px 16px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.info-card {
  display: block;
  background-color: var(--color-cream);
  padding: 20px 12px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid #e8e2d8;
}

.info-card:hover {
  background-color: #ede9e1;
}

.info-card-icon {
  font-size: 24px;
  margin-bottom: 8px;
  color: var(--color-gold-dark);
}

.info-card-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.05em;
  line-height: 1.4;
}

.info-card-sub {
  font-size: 9px;
  color: var(--color-gray);
  margin-top: 4px;
  letter-spacing: 0.05em;
}

/* =====================
   Q&A Section
   ===================== */
.qa-section {
  background-color: var(--color-white);
  padding-bottom: 48px;
}

.qa-list {
  padding: 0 16px;
}

.qa-item {
  border-bottom: 1px solid #e8e8e8;
}

.qa-question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
  cursor: pointer;
  user-select: none;
}

.qa-q-mark {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gold-dark);
  flex-shrink: 0;
  width: 20px;
}

.qa-q-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-dark);
  flex: 1;
  line-height: 1.5;
  letter-spacing: 0.03em;
}

.qa-toggle {
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-gray);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}

.qa-toggle::after {
  content: '+';
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1;
}

.qa-item.active .qa-toggle {
  background-color: var(--color-black);
  border-color: var(--color-black);
}

.qa-item.active .qa-toggle::after {
  content: '−';
  color: var(--color-white);
}

.qa-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.qa-answer-inner {
  display: flex;
  gap: 12px;
  padding: 0 0 20px;
}

.qa-a-mark {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-black);
  flex-shrink: 0;
  width: 20px;
}

.qa-a-text {
  font-size: 13px;
  color: var(--color-text);
  line-height: 1.8;
}

/* =====================
   Footer
   ===================== */
.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.footer-top {
  padding: 40px 24px 32px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-white);
  margin-bottom: 4px;
}

.footer-logo-sub {
  font-size: 9px;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.4);
  margin-bottom: 20px;
  text-transform: uppercase;
}

.footer-sns {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.footer-sns a {
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  transition: var(--transition);
}

.footer-sns a:hover {
  border-color: var(--color-gold);
  color: var(--color-gold);
}

.footer-links {
  padding: 24px;
}

.footer-links-title {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 12px;
  margin-top: 20px;
}

.footer-links ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

.footer-links ul li a {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  padding: 4px 0;
  display: block;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  color: var(--color-white);
}

.footer-payment {
  padding: 20px 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-payment-title {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  margin-bottom: 12px;
  text-align: center;
}

.payment-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.payment-badge {
  background-color: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 10px;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.03em;
}

.footer-bottom {
  padding: 16px 24px;
  text-align: center;
}

.footer-copyright {
  font-size: 10px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.05em;
}

/* =====================
   Sale Badge
   ===================== */
.sale-banner {
  background-color: var(--color-black);
  color: var(--color-gold);
  font-size: 11px;
  letter-spacing: 0.2em;
  font-weight: 700;
  border-bottom: 1px solid var(--color-gold);
  overflow: hidden;
  padding: 8px 0;
}

.sale-banner-track {
  display: inline-flex;
  white-space: nowrap;
  animation: banner-scroll 18s linear infinite;
}

.sale-banner-track span {
  display: inline-block;
}

@keyframes banner-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@media (min-width: 768px) {
  .sale-banner {
    text-align: center;
    padding: 8px 16px;
  }
  .sale-banner-track {
    animation: none;
    justify-content: center;
  }
  .sale-banner-track span:last-child {
    display: none;
  }
}

/* =====================
   Desktop Overrides (768px+)
   ===================== */
@media (min-width: 768px) {
  /* Header */
  .site-header {
    padding: 0 40px;
    height: 70px;
  }

  .hamburger-btn {
    display: none;
  }

  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 24px;
  }

  .desktop-nav a {
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--color-dark);
    font-weight: 500;
    padding: 4px 0;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
  }

  .desktop-nav a:hover {
    border-bottom-color: var(--color-gold);
    color: var(--color-gold-dark);
  }

  /* Hero */
  .img-placeholder-hero {
    aspect-ratio: 1440 / 600;
  }

  /* Product Grid */
  .pickup-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Section header */
  .section-title-en {
    font-size: 52px;
  }

  /* Component */
  .component-grid {
    grid-template-columns: repeat(7, 1fr);
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
  }

  /* Info */
  .info-grid {
    grid-template-columns: repeat(4, 1fr);
    max-width: 960px;
    margin: 0 auto;
  }

  /* About */
  .about-catchphrase {
    max-width: 700px;
    margin: 16px auto;
    font-size: 22px;
  }

  .about-text {
    max-width: 700px;
    margin: 0 auto;
    font-size: 14px;
  }

  .img-placeholder-about {
    aspect-ratio: 1440 / 480;
  }

  /* Ranking */
  .ranking-list {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 24px;
  }
}

@media (min-width: 1200px) {
  .site-header {
    padding: 0 80px;
  }

  .desktop-nav {
    gap: 32px;
  }
}

/* =====================
   商品詳細ページ
   ===================== */

/* パンくずリスト */
.breadcrumb {
  padding: 12px 16px;
  font-size: 11px;
  color: var(--color-gray);
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--color-cream);
  border-bottom: 1px solid #e8e2d8;
}

.breadcrumb a {
  color: var(--color-gray);
}

.breadcrumb a:hover {
  color: var(--color-gold-dark);
}

.breadcrumb-sep {
  font-size: 9px;
}

/* 商品メイン画像エリア */
.product-gallery {
  background-color: var(--color-white);
}

.product-main-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--color-black);
  position: relative;
  overflow: hidden;
}

.product-thumbnails {
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  background-color: #f9f9f9;
  border-top: 1px solid #eee;
}

.product-thumb {
  width: 64px;
  height: 64px;
  background-color: var(--color-black);
  border: 2px solid transparent;
  cursor: pointer;
  flex-shrink: 0;
  transition: var(--transition);
}

.product-thumb.active {
  border-color: var(--color-gold);
}

/* 商品情報エリア */
.product-info {
  padding: 20px 16px 0;
}

.product-brand-badge {
  display: inline-block;
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--color-gold-dark);
  border: 1px solid var(--color-gold);
  padding: 3px 10px;
  margin-bottom: 10px;
  text-transform: uppercase;
}

.product-detail-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.4;
  margin-bottom: 4px;
}

.product-detail-name-en {
  font-size: 11px;
  color: var(--color-gray);
  letter-spacing: 0.12em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.product-detail-price-wrap {
  background-color: var(--color-cream);
  padding: 16px;
  margin: 16px 0;
  border-left: 3px solid var(--color-gold);
}

.product-detail-price {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1;
}

.product-detail-price .tax-label {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-gray);
  margin-left: 4px;
}

.product-detail-price-sub {
  font-size: 11px;
  color: var(--color-gray);
  margin-top: 6px;
}

/* 数量セレクター */
.quantity-wrap {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 16px 0;
}

.quantity-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-dark);
  margin-right: 16px;
  letter-spacing: 0.05em;
}

.quantity-btn {
  width: 36px;
  height: 36px;
  border: 1px solid #ddd;
  background: var(--color-white);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-dark);
  transition: var(--transition);
  user-select: none;
}

.quantity-btn:hover {
  background-color: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.quantity-input {
  width: 48px;
  height: 36px;
  border: 1px solid #ddd;
  border-left: none;
  border-right: none;
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-dark);
  background: var(--color-white);
  -moz-appearance: textfield;
}

.quantity-input::-webkit-outer-spin-button,
.quantity-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
}

/* 購入ボタン */
.btn-cart {
  display: block;
  width: 100%;
  padding: 16px;
  background-color: var(--color-white);
  color: var(--color-black);
  border: 2px solid var(--color-black);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 10px;
}

.btn-cart:hover {
  background-color: var(--color-black);
  color: var(--color-white);
}

.btn-purchase {
  display: block;
  width: 100%;
  padding: 18px;
  background-color: var(--color-black);
  color: var(--color-white);
  border: 2px solid var(--color-black);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 16px;
}

.btn-purchase:hover {
  background-color: var(--color-gold-dark);
  border-color: var(--color-gold-dark);
}

/* 安心バッジ */
.trust-badges {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: #e8e8e8;
  margin: 16px 0 24px;
}

.trust-badge {
  background-color: var(--color-white);
  padding: 12px 6px;
  text-align: center;
}

.trust-badge-icon {
  font-size: 18px;
  color: var(--color-gold-dark);
  margin-bottom: 4px;
}

.trust-badge-text {
  font-size: 9px;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.04em;
  line-height: 1.4;
}

/* 商品詳細アコーディオン */
.detail-section {
  border-top: 1px solid #e8e8e8;
}

.detail-item {
  border-bottom: 1px solid #e8e8e8;
}

.detail-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  cursor: pointer;
  user-select: none;
  background-color: var(--color-white);
  transition: var(--transition);
}

.detail-question:hover {
  background-color: var(--color-cream);
}

.detail-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.05em;
}

.detail-toggle {
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-gray);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
  font-size: 14px;
  color: var(--color-gray);
}

.detail-item.active .detail-toggle {
  background-color: var(--color-black);
  border-color: var(--color-black);
  color: var(--color-white);
  transform: rotate(45deg);
}

.detail-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.detail-body-inner {
  padding: 16px;
  font-size: 13px;
  color: var(--color-text);
  line-height: 1.9;
  background-color: #fafafa;
}

.detail-body-inner ul {
  list-style: disc;
  padding-left: 18px;
}

.detail-body-inner li {
  margin-bottom: 6px;
}

/* 関連商品 */
.related-section {
  background-color: var(--color-cream);
  padding: 40px 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: #e8e2d8;
  margin-top: 16px;
}

/* ページ内ハイライト */
.product-highlights {
  padding: 20px 16px;
  background-color: var(--color-dark);
  color: var(--color-white);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.highlight-item:last-child {
  border-bottom: none;
}

.highlight-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-gold);
  flex-shrink: 0;
  margin-top: 6px;
}

.highlight-text {
  font-size: 12px;
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
}

@media (min-width: 768px) {
  .product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px;
    align-items: start;
  }

  .product-gallery {
    position: sticky;
    top: 80px;
  }

  .product-info {
    padding: 0;
  }

  .product-detail-name {
    font-size: 26px;
  }

  .related-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 640px;
    margin: 16px auto 0;
  }
}