/* ============================================
   日本雜貨店 × 哔哩哔哩風 — 全局樣式
   ============================================ */
:root {
  /* B站系 */
  --bili-pink: #FB7299;
  --bili-pink-light: #FF85A8;
  --bili-pink-dark: #E85A84;
  --bili-blue: #00A1D6;
  --bili-blue-light: #00B5E9;
  /* 日雜・溫馨 */
  --zakka-cream: #FFFBF5;
  --zakka-beige: #F5EDE4;
  --zakka-brown: #8B7355;
  --zakka-green: #7BA37B;
  --zakka-sage: #9CAF88;
  /* 中性 */
  --text-dark: #2C2C2C;
  --text-muted: #666;
  --white: #FFFFFF;
  --border: #E8E4DF;
  /* 陰影・圓角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-soft: 0 4px 20px rgba(251, 114, 153, 0.12);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 40px rgba(251, 114, 153, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--text-dark);
  background: var(--zakka-cream);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--bili-pink);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--bili-pink-dark);
}

/* ========== 頂部導航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
  padding-top: env(safe-area-inset-top);
}
.site-header::after {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(251, 114, 153, 0.35) 20%, rgba(251, 114, 153, 0.5) 50%, rgba(251, 114, 153, 0.35) 80%, transparent 100%);
  margin: 0 auto;
  max-width: 1200px;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 80px;
}

/* Logo：圖標 + 暮らしの雑貨 */
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}
.logo-icon {
  width: 130px;
  height: 56px;
  border-radius: 28px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--bili-blue) 0%, var(--bili-blue-light) 28%, var(--bili-pink) 55%, var(--bili-pink-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 20px rgba(251, 114, 153, 0.35), 0 4px 16px rgba(0, 161, 214, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.35) inset;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.logo-icon::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.28) 0%, transparent 100%);
  border-radius: 28px 28px 0 0;
  pointer-events: none;
}
.logo-icon .logo-initial {
  position: relative;
  font-size: 0.82rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.08em;
  line-height: 1;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}
.logo-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.35;
  letter-spacing: 0.06em;
  min-width: 140px;
}
.logo-text .brand {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: 0.08em;
}
.logo-text .tagline {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-dark);
  letter-spacing: 0.12em;
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", "Hiragino Sans", sans-serif;
}
.logo-wrap:hover {
  color: inherit;
}
.logo-wrap:hover .logo-icon {
  box-shadow: 0 6px 28px rgba(251, 114, 153, 0.45), 0 6px 20px rgba(0, 161, 214, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.4) inset;
  transform: translateY(-1px);
}

/* 分類導航：獨立區塊・按鈕更明顯 */
.nav-categories {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: center;
  flex: 1;
  max-width: 640px;
}
.nav-categories a {
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--text-dark);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  background: var(--zakka-beige);
}
.nav-categories a:hover {
  background: linear-gradient(135deg, var(--bili-pink-light), var(--bili-pink));
  color: var(--white);
  border-color: var(--bili-pink);
  box-shadow: 0 4px 14px rgba(251, 114, 153, 0.3);
  transform: translateY(-1px);
}

/* 右側：カート・ログイン・新規登録 */
.nav-auth {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-auth a,
.nav-auth .cart-link {
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nav-auth .cart-link {
  background: var(--zakka-beige);
  color: var(--text-dark);
  border: 1px solid var(--border);
  text-decoration: none;
}
.nav-auth .cart-link:hover {
  background: var(--white);
  border-color: var(--bili-pink);
  color: var(--bili-pink-dark);
  box-shadow: 0 4px 12px rgba(251, 114, 153, 0.15);
  transform: translateY(-1px);
}
.nav-auth .cart-count {
  background: var(--bili-pink);
  color: var(--white);
  font-size: 0.75rem;
  min-width: 22px;
  height: 22px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
}
.nav-auth .cart-link[data-count="0"] .cart-count,
.nav-auth .cart-link:not([data-count]) .cart-count {
  display: none;
}
.nav-auth .btn-login {
  color: var(--text-dark);
  background: var(--white);
  border: 2px solid var(--border);
}
.nav-auth .btn-login:hover {
  background: var(--zakka-beige);
  border-color: var(--zakka-brown);
  color: var(--text-dark);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transform: translateY(-1px);
}
.nav-auth .btn-register {
  background: linear-gradient(135deg, var(--bili-pink), var(--bili-pink-dark));
  color: var(--white);
  border: 2px solid transparent;
  box-shadow: 0 4px 16px rgba(251, 114, 153, 0.4);
}
.nav-auth .btn-register:hover {
  box-shadow: 0 6px 22px rgba(251, 114, 153, 0.5);
  transform: translateY(-2px);
}

/* 舊 logo 類保留給未替換的頁面 */
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.02em;
}
.logo span {
  color: var(--bili-pink);
}

/* ========== 活動頁專用 ========== */
.activity-page {
  min-height: calc(100vh - 64px);
  background: linear-gradient(165deg, #FFF5F8 0%, #F0F8FF 35%, #FFFBF5 70%, #F5F0EB 100%);
  position: relative;
  overflow: hidden;
}

/* 裝飾背景 */
.activity-page::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(251, 114, 153, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.activity-page::after {
  content: "";
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 40%;
  height: 60%;
  background: radial-gradient(ellipse, rgba(0, 161, 214, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero {
  max-width: 1000px;
  margin: 0 auto;
  padding: 60px 24px 80px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, var(--bili-pink), var(--bili-pink-light));
  color: var(--white);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  box-shadow: var(--shadow-soft);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-dark);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--bili-pink), var(--bili-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 32px;
}
.hero-desc strong {
  color: var(--bili-pink-dark);
}

/* 活動頁：登録のメリット */
.hero-benefits {
  list-style: none;
  max-width: 480px;
  margin: 0 auto 40px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 24px;
}
.hero-benefits li {
  font-size: 0.95rem;
  color: var(--text-dark);
  padding-left: 1.5em;
  position: relative;
}
.hero-benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--zakka-green);
  font-weight: 700;
}

/* 禮品卡片區 */
.gift-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-bottom: 48px;
}

.gift-card {
  width: 160px;
  padding: 24px 16px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s, box-shadow 0.25s;
  border: 1px solid var(--border);
}
.gift-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.gift-card .icon {
  font-size: 2.5rem;
  margin-bottom: 8px;
  filter: drop-shadow(0 2px 8px rgba(251, 114, 153, 0.2));
}
.gift-card .title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
}
.gift-card .gift-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 6px;
}

/* 活動頁裝飾 */
.hero .deco-dots {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.hero .deco-dots.d1 { top: 15%; left: 5%; width: 120px; height: 120px; background: radial-gradient(circle, rgba(251, 114, 153, 0.15) 0%, transparent 70%); }
.hero .deco-dots.d2 { bottom: 20%; right: 8%; width: 80px; height: 80px; background: radial-gradient(circle, rgba(0, 161, 214, 0.12) 0%, transparent 70%); }
.hero .deco-dots.d3 { top: 40%; right: 2%; width: 60px; height: 60px; background: radial-gradient(circle, rgba(251, 114, 153, 0.1) 0%, transparent 70%); }

.cta-wrap {
  margin-top: 24px;
}
.cta-btn {
  display: inline-block;
  padding: 16px 48px;
  background: linear-gradient(135deg, var(--bili-pink), var(--bili-pink-dark));
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 700;
  border-radius: var(--radius-xl);
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(251, 114, 153, 0.4);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(251, 114, 153, 0.45);
}

.hero-note {
  margin-top: 32px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* 分類區塊 */
.categories-section {
  padding: 48px 24px 64px;
  position: relative;
  z-index: 1;
}
.section-inner {
  max-width: 1000px;
  margin: 0 auto;
}
.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 28px;
  color: var(--text-dark);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  justify-items: center;
}
.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 16px;
  min-width: 140px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
  color: var(--text-dark);
  font-size: 0.9rem;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: var(--bili-pink);
  color: var(--bili-pink-dark);
}
.category-card .cat-icon {
  font-size: 1.8rem;
}

/* お知らせ區塊 */
.news-section {
  padding: 32px 24px 56px;
  background: rgba(255,255,255,0.6);
  position: relative;
  z-index: 1;
}
.news-list {
  list-style: none;
  max-width: 560px;
  margin: 0 auto;
}
.news-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-dark);
}
.news-list li:last-child { border-bottom: none; }
.news-date {
  display: inline-block;
  margin-right: 12px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ========== 註冊頁 ========== */
.register-page {
  min-height: calc(100vh - 64px);
  background: linear-gradient(180deg, #FFFBF5 0%, #F5EDE4 100%);
  padding: 48px 24px 80px;
}

.register-container {
  max-width: 520px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 48px 40px;
  border: 1px solid var(--border);
}

.register-container h1 {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.register-container .subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.form-group label .required {
  color: var(--bili-pink);
  margin-left: 2px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--bili-pink);
  box-shadow: 0 0 0 3px rgba(251, 114, 153, 0.15);
}
.form-group input::placeholder {
  color: #AAA;
}
.form-group .hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* 日式姓名：姓・名 兩欄一行對齊 */
.form-group-name .name-row {
  display: flex;
  align-items: center;
  gap: 0 12px;
  flex-wrap: wrap;
}
.form-group-name .name-label {
  flex: 0 0 2.5em;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}
.form-group-name .name-row input {
  flex: 1;
  min-width: 80px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group-name .name-row input:focus {
  outline: none;
  border-color: var(--bili-pink);
  box-shadow: 0 0 0 3px rgba(251, 114, 153, 0.15);
}
.form-group-name .name-row input::placeholder {
  color: #AAA;
}
.form-group-name .hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.submit-wrap {
  margin-top: 32px;
}
.submit-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--bili-pink), var(--bili-pink-dark));
  color: var(--white);
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s, box-shadow 0.2s;
}
.submit-btn:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}
.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* 註冊成功區（預設隱藏） */
.success-box {
  display: none;
  text-align: center;
  padding: 24px 0;
}
.success-box.show {
  display: block;
}
.success-box .icon-success {
  width: 80px;
  height: 80px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--zakka-green), var(--zakka-sage));
  color: var(--white);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(124, 163, 123, 0.35);
}
.success-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.success-box p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 400px;
  margin: 0 auto 24px;
}
.success-box .email-display {
  color: var(--text-dark);
  font-weight: 600;
  word-break: break-all;
}
.success-box .back-link {
  display: inline-block;
  padding: 12px 24px;
  background: var(--zakka-beige);
  color: var(--text-dark);
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-top: 8px;
}
.success-box .back-link:hover {
  background: var(--zakka-brown);
  color: var(--white);
}

/* 表單在成功時隱藏 */
.form-box.hide {
  display: none;
}

/* ========== 頁尾 ========== */
.site-footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.8);
  padding: 32px 24px;
  margin-top: auto;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.9rem;
}
.site-footer a {
  color: rgba(255,255,255,0.9);
}

/* ========== 響應式・手機適配 ========== */
/* 觸控優化（全站） */
@media (hover: none) and (pointer: coarse) {
  .nav-categories a,
  .nav-auth a,
  .nav-auth .cart-link,
  .cta-btn,
  .btn-add-cart,
  .submit-btn,
  .category-card {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .nav-auth a,
  .nav-auth .cart-link { min-height: 44px; }
  a:focus-visible,
  button:focus-visible { outline: 2px solid var(--bili-pink); outline-offset: 2px; }
}
/* 防止 iOS 輸入框縮放 */
@media (max-width: 768px) {
  .form-group input,
  .form-group select,
  .form-group-name .name-row input {
    font-size: 16px !important;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: auto;
    padding: 12px 16px;
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    gap: 12px;
  }
  .logo-wrap {
    flex: 1;
    min-width: 0;
  }
  .logo-icon {
    width: 90px;
    height: 40px;
    border-radius: 20px;
  }
  .logo-icon::before {
    border-radius: 20px 20px 0 0;
  }
  .logo-icon .logo-initial {
    font-size: 0.62rem;
    letter-spacing: 0.05em;
  }
  .logo-text {
    min-width: 0;
  }
  .logo-text .tagline {
    font-size: 0.9rem;
    letter-spacing: 0.06em;
  }
  .logo-text .brand {
    font-size: 1.35rem;
  }
  .nav-auth {
    order: 2;
    width: 100%;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: nowrap;
  }
  .nav-auth a,
  .nav-auth .cart-link {
    padding: 10px 14px;
    font-size: 0.85rem;
    min-height: 44px;
    border-radius: 999px;
  }
  .nav-auth .btn-register {
    padding: 10px 18px;
  }
  .nav-categories {
    order: 3;
    width: 100%;
    margin-top: 4px;
    padding-top: 10px;
    padding-bottom: 4px;
    border-top: 1px solid var(--border);
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-left: -16px;
    margin-right: -16px;
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }
  .nav-categories::-webkit-scrollbar {
    display: none;
  }
  .nav-categories a {
    white-space: nowrap;
    padding: 8px 14px;
    font-size: 0.85rem;
    flex-shrink: 0;
  }
  .hero {
    padding: 28px 16px 48px;
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }
  .hero-badge {
    font-size: 0.8rem;
    padding: 8px 14px;
    margin-bottom: 20px;
  }
  .hero h1 {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 14px;
  }
  .hero-desc {
    font-size: 0.95rem;
    margin-bottom: 24px;
  }
  .hero-benefits {
    flex-direction: column;
    align-items: flex-start;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 28px;
    gap: 10px;
  }
  .hero-benefits li {
    font-size: 0.9rem;
  }
  .gift-cards {
    gap: 12px;
    margin-bottom: 32px;
  }
  .gift-card {
    width: 140px;
    padding: 20px 12px;
    flex-shrink: 0;
  }
  .cta-wrap {
    margin-top: 20px;
  }
  .cta-btn {
    display: block;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    padding: 16px 24px;
    font-size: 1rem;
    min-height: 52px;
    box-sizing: border-box;
  }
  .hero-note {
    font-size: 0.8rem;
    margin-top: 24px;
    line-height: 1.6;
  }
  .categories-section,
  .news-section {
    padding-left: max(24px, env(safe-area-inset-left));
    padding-right: max(24px, env(safe-area-inset-right));
  }
  .register-container {
    padding: 32px 24px;
    margin-left: max(16px, env(safe-area-inset-left));
    margin-right: max(16px, env(safe-area-inset-right));
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .form-group-name .name-row {
    display: grid;
    grid-template-columns: 2.5em 1fr;
    gap: 8px 12px;
    align-items: center;
  }
  .form-group-name .name-row .name-label {
    flex: none;
  }
  .form-group-name .name-row input {
    min-width: 0;
  }
  .site-footer {
    padding-left: max(24px, env(safe-area-inset-left));
    padding-right: max(24px, env(safe-area-inset-right));
    padding-bottom: max(32px, env(safe-area-inset-bottom));
  }
  .product-detail-page,
  .cart-page {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
    padding-bottom: max(64px, env(safe-area-inset-bottom));
  }
  .product-detail-main .btn-add-cart {
    min-height: 48px;
    padding: 14px 24px;
  }
  .cart-summary .btn-checkout {
    min-height: 48px;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 10px 12px;
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
  }
  .logo-icon {
    width: 76px;
    height: 36px;
    border-radius: 18px;
  }
  .logo-icon .logo-initial {
    font-size: 0.55rem;
  }
  .logo-text .tagline {
    font-size: 0.82rem;
  }
  .nav-auth {
    gap: 8px;
  }
  .nav-auth a,
  .nav-auth .cart-link {
    padding: 8px 12px;
    font-size: 0.8rem;
  }
  .nav-auth .btn-register {
    padding: 8px 14px;
  }
  .nav-categories {
    padding-left: max(12px, env(safe-area-inset-left));
    padding-right: max(12px, env(safe-area-inset-right));
    margin-left: -12px;
    margin-right: -12px;
  }
  .nav-categories a {
    padding: 8px 12px;
    font-size: 0.8rem;
  }
  .hero {
    padding: 24px 12px 40px;
  }
  .hero h1 {
    font-size: 1.35rem;
  }
  .gift-card {
    width: 120px;
    padding: 16px 10px;
  }
  .gift-card .icon {
    font-size: 2rem;
  }
  .gift-card .title {
    font-size: 0.85rem;
  }
  .cta-btn {
    max-width: none;
    padding: 14px 20px;
  }
  .page-inner {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }
}

/* ========== 商品一覧・カテゴリページ ========== */
.page-inner { max-width: 1200px; margin: 0 auto; padding: 24px 16px 48px; }
.page-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; color: var(--text-dark); }
.page-subtitle { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 24px; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 20px; }
.product-card { background: var(--white); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border); box-shadow: 0 2px 12px rgba(0,0,0,0.04); transition: transform 0.2s, box-shadow 0.2s; text-decoration: none; color: inherit; display: block; }
.product-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
.product-card .thumb { aspect-ratio: 1; background: var(--zakka-beige); display: flex; align-items: center; justify-content: center; font-size: 2.5rem; color: var(--text-muted); overflow: hidden; }
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-card .info { padding: 12px 14px; }
.product-card .name { font-size: 0.9rem; font-weight: 600; color: var(--text-dark); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card .price { font-size: 1rem; font-weight: 700; color: var(--bili-pink-dark); margin-top: 6px; }
.product-card .price .tax { font-size: 0.75rem; font-weight: 500; color: var(--text-muted); }

/* ========== 商品詳細 ========== */
.product-detail-page { min-height: calc(100vh - 64px); background: var(--zakka-cream); padding: 32px 16px 64px; }
.product-detail-inner { max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.product-detail-image { aspect-ratio: 1; background: var(--white); border-radius: var(--radius-lg); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 6rem; color: var(--text-muted); box-shadow: var(--shadow-card); overflow: hidden; }
.product-detail-image img { width: 100%; height: 100%; object-fit: cover; }
.product-detail-main h1 { font-size: 1.35rem; font-weight: 700; color: var(--text-dark); line-height: 1.5; margin-bottom: 16px; }
.product-detail-main .price-block { font-size: 1.5rem; font-weight: 700; color: var(--bili-pink-dark); margin-bottom: 8px; }
.product-detail-main .price-block .tax-note { font-size: 0.85rem; font-weight: 500; color: var(--text-muted); }
.product-detail-main .desc { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 24px; }
.product-detail-main .add-cart-wrap { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.product-detail-main .qty-input { width: 80px; padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-md); font-size: 1rem; text-align: center; }
.product-detail-main .btn-add-cart { padding: 14px 28px; background: linear-gradient(135deg, var(--bili-pink), var(--bili-pink-dark)); color: var(--white); border: none; border-radius: var(--radius-md); font-size: 1rem; font-weight: 700; cursor: pointer; box-shadow: var(--shadow-soft); transition: transform 0.2s, box-shadow 0.2s; }
.product-detail-main .btn-add-cart:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.product-detail-main .back-link { display: inline-block; margin-top: 24px; font-size: 0.9rem; color: var(--text-muted); }
.product-detail-main .back-link:hover { color: var(--bili-pink); }

/* ========== カート ========== */
.cart-page { min-height: calc(100vh - 64px); background: var(--zakka-cream); padding: 32px 16px 64px; }
.cart-inner { max-width: 800px; margin: 0 auto; }
.cart-page h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 24px; color: var(--text-dark); }
.cart-empty { text-align: center; padding: 48px 24px; background: var(--white); border-radius: var(--radius-lg); border: 1px solid var(--border); }
.cart-empty p { color: var(--text-muted); margin-bottom: 20px; }
.cart-list { list-style: none; padding: 0; margin: 0; }
.cart-item { display: grid; grid-template-columns: 80px 1fr auto auto; gap: 16px; align-items: center; padding: 16px; background: var(--white); border-radius: var(--radius-md); border: 1px solid var(--border); margin-bottom: 12px; }
.cart-item .thumb { width: 80px; height: 80px; background: var(--zakka-beige); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 2rem; color: var(--text-muted); overflow: hidden; flex-shrink: 0; }
.cart-item .thumb img { width: 100%; height: 100%; object-fit: cover; }
.cart-item .name { font-weight: 600; color: var(--text-dark); }
.cart-item .price { color: var(--bili-pink-dark); font-weight: 700; }
.cart-item .qty { width: 60px; padding: 8px; text-align: center; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.cart-item .btn-remove { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 0.85rem; padding: 4px 0; }
.cart-item .btn-remove:hover { color: var(--bili-pink-dark); }
.cart-summary { margin-top: 24px; padding: 20px; background: var(--white); border-radius: var(--radius-md); border: 1px solid var(--border); text-align: right; }
.cart-summary .total { font-size: 1.25rem; font-weight: 700; color: var(--text-dark); }
.cart-summary .total span { color: var(--bili-pink-dark); }
.cart-summary .btn-checkout { margin-top: 16px; padding: 14px 32px; background: linear-gradient(135deg, var(--bili-pink), var(--bili-pink-dark)); color: var(--white); border: none; border-radius: var(--radius-md); font-size: 1rem; font-weight: 700; cursor: pointer; box-shadow: var(--shadow-soft); }
.cart-summary .btn-checkout:hover { box-shadow: var(--shadow-hover); }
@media (max-width: 768px) {
  .product-detail-inner { grid-template-columns: 1fr; }
  .product-detail-image { max-width: 320px; margin: 0 auto; }
  .cart-item { grid-template-columns: 60px 1fr; grid-template-rows: auto auto; }
  .cart-item .price, .cart-item .qty { grid-column: 2; }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .product-card .thumb { font-size: 2rem; }
}