/* ==========================================================================
   茶器店サイト共通スタイルシート
   デザインテイスト：和モダン・侘び寂び
   ========================================================================== */

:root {
  /* ブランドカラー（js/config.js の内容に合わせて変更してください） */
  --color-indigo: #223a5e;       /* 藍色：メインカラー */
  --color-indigo-dark: #16283f;
  --color-kinari: #f6f2ea;       /* 生成り：背景色 */
  --color-kinari-deep: #ece4d6;
  --color-sumi: #2b2b2b;         /* 墨色：本文テキスト */
  --color-sumi-light: #5a5a54;
  --color-persimmon: #b5533c;    /* 柿色：アクセント・ボタン */
  --color-persimmon-dark: #97402c;
  --color-matcha: #7d8f69;       /* 抹茶色：サブアクセント */
  --color-line: #ddd4c4;
  --color-white: #ffffff;

  --font-serif: "Shippori Mincho", "Noto Serif JP", serif;
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;

  --max-width: 1120px;
  --radius: 2px;
  --shadow-soft: 0 4px 18px rgba(43, 43, 43, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-sumi);
  background: var(--color-kinari);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--color-indigo);
  line-height: 1.5;
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(1.8rem, 3vw + 1rem, 2.8rem); letter-spacing: 0.04em; }
h2 { font-size: clamp(1.4rem, 2vw + 1rem, 2rem); letter-spacing: 0.03em; }
h3 { font-size: 1.2rem; }

p { margin: 0 0 1em; }

a { color: var(--color-indigo); text-decoration: none; }
a:hover { color: var(--color-persimmon); }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- ヘッダー ---------- */
.site-header {
  background: var(--color-kinari);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-indigo);
  letter-spacing: 0.08em;
}

.brand img { height: 40px; width: auto; }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-size: 0.95rem;
  color: var(--color-sumi);
  letter-spacing: 0.03em;
}

.main-nav a:hover { color: var(--color-persimmon); }

.header-actions { display: flex; align-items: center; gap: 18px; }

.cart-link {
  position: relative;
  font-size: 0.95rem;
}

.cart-count {
  position: absolute;
  top: -10px;
  right: -16px;
  background: var(--color-persimmon);
  color: var(--color-white);
  font-size: 0.7rem;
  border-radius: 50%;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--color-indigo);
  cursor: pointer;
}

/* ---------- ヒーロー ---------- */
.hero {
  background: linear-gradient(120deg, var(--color-indigo) 0%, var(--color-indigo-dark) 100%);
  color: var(--color-kinari);
  padding: 90px 24px;
  text-align: center;
}

.hero h1 { color: var(--color-kinari); }

.hero p {
  max-width: 560px;
  margin: 0 auto 2em;
  color: #e4ded0;
  font-size: 1.05rem;
}

.hero .btn { margin: 0 auto; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: var(--radius);
  border: 1px solid var(--color-persimmon);
  background: var(--color-persimmon);
  color: var(--color-white);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, transform 0.15s;
}

.btn:hover {
  background: var(--color-persimmon-dark);
  color: var(--color-white);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-kinari);
  border-color: var(--color-kinari);
}

.btn-outline:hover {
  background: var(--color-kinari);
  color: var(--color-indigo);
}

.btn-secondary {
  background: var(--color-indigo);
  border-color: var(--color-indigo);
}
.btn-secondary:hover { background: var(--color-indigo-dark); }

.btn-block { display: block; width: 100%; text-align: center; }

.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- セクション共通 ---------- */
.section { padding: 72px 0; }
.section-title { text-align: center; margin-bottom: 44px; }
.section-title .kicker {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  color: var(--color-matcha);
  margin-bottom: 10px;
}

.section-alt { background: var(--color-kinari-deep); }

/* ---------- 商品グリッド ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 32px;
}

.product-card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  box-shadow: var(--shadow-soft);
  transform: translateY(-3px);
}

.product-card a.thumb-link { display: block; background: var(--color-kinari-deep); }

.product-card img { aspect-ratio: 1 / 1; object-fit: cover; width: 100%; }

.product-card .info { padding: 16px 18px 20px; flex: 1; display: flex; flex-direction: column; }

.product-card .category-tag {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-matcha);
  margin-bottom: 6px;
}

.product-card h3 { font-size: 1rem; margin-bottom: 6px; }
.product-card h3 a { color: var(--color-sumi); }

.product-card .price {
  color: var(--color-indigo);
  font-weight: 600;
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-serif);
}

.product-card .add-btn {
  margin-top: 10px;
  font-size: 0.85rem;
  padding: 9px 0;
}

/* ---------- フィルター ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
}

.filter-bar button {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  color: var(--color-sumi-light);
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 0.85rem;
  cursor: pointer;
}

.filter-bar button.active,
.filter-bar button:hover {
  background: var(--color-indigo);
  border-color: var(--color-indigo);
  color: var(--color-white);
}

/* ---------- パンくず ---------- */
.breadcrumb {
  font-size: 0.8rem;
  color: var(--color-sumi-light);
  padding: 18px 0;
}
.breadcrumb a { color: var(--color-sumi-light); }
.breadcrumb a:hover { color: var(--color-persimmon); }

/* ---------- 商品詳細 ---------- */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: flex-start;
}

.product-detail .gallery img {
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  background: var(--color-white);
}

.product-detail .category-tag {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-matcha);
  margin-bottom: 10px;
  display: block;
}

.product-detail .price {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--color-indigo);
  margin: 18px 0;
}

.qty-row { display: flex; align-items: center; gap: 16px; margin: 24px 0; }
.qty-row input {
  width: 64px;
  padding: 10px;
  text-align: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 1rem;
}

.product-spec {
  margin-top: 40px;
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}
.product-spec table { width: 100%; border-collapse: collapse; }
.product-spec th, .product-spec td {
  text-align: left;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.92rem;
}
.product-spec th { width: 30%; color: var(--color-sumi-light); font-weight: 500; }

/* ---------- カート ---------- */
.cart-table { width: 100%; border-collapse: collapse; margin-bottom: 32px; }
.cart-table th {
  text-align: left;
  border-bottom: 2px solid var(--color-indigo);
  padding: 12px 8px;
  font-size: 0.85rem;
  color: var(--color-sumi-light);
  font-weight: 500;
}
.cart-table td { padding: 16px 8px; border-bottom: 1px solid var(--color-line); vertical-align: middle; }

.cart-item-info { display: flex; align-items: center; gap: 16px; }
.cart-item-info img { width: 72px; height: 72px; object-fit: cover; border-radius: var(--radius); background: var(--color-kinari-deep); }

.cart-qty-input { width: 56px; padding: 6px; text-align: center; border: 1px solid var(--color-line); border-radius: var(--radius); }

.remove-link { color: var(--color-persimmon); font-size: 0.85rem; cursor: pointer; background: none; border: none; padding: 0; }

.cart-summary {
  max-width: 380px;
  margin-left: auto;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  padding: 24px;
  border-radius: var(--radius);
}
.cart-summary .row { display: flex; justify-content: space-between; margin-bottom: 12px; font-size: 0.95rem; }
.cart-summary .total { font-size: 1.2rem; font-weight: 600; color: var(--color-indigo); border-top: 1px solid var(--color-line); padding-top: 14px; margin-top: 14px; }

.empty-state { text-align: center; padding: 80px 0; color: var(--color-sumi-light); }

/* ---------- フォーム ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-grid .full { grid-column: 1 / -1; }

.field { margin-bottom: 20px; }
.field label { display: block; font-size: 0.85rem; margin-bottom: 6px; color: var(--color-sumi-light); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  background: var(--color-white);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--color-indigo);
}
.field.required label::after { content: " *"; color: var(--color-persimmon); }

.payment-options { display: flex; flex-direction: column; gap: 12px; margin: 20px 0 28px; }
.payment-option {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px 18px;
  cursor: pointer;
  background: var(--color-white);
}
.payment-option.selected { border-color: var(--color-indigo); box-shadow: 0 0 0 1px var(--color-indigo); }
.payment-option label { display: flex; align-items: center; gap: 10px; font-weight: 600; cursor: pointer; }
.payment-option .desc { margin: 8px 0 0 26px; font-size: 0.85rem; color: var(--color-sumi-light); }

.bank-info-box {
  background: var(--color-kinari-deep);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-top: 20px;
  font-size: 0.9rem;
}

/* ---------- 会社紹介 / お知らせボックス ---------- */
.story-block { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.story-block img { border-radius: var(--radius); }

.notice-box {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-persimmon);
  padding: 20px 24px;
  border-radius: var(--radius);
  margin-bottom: 32px;
  font-size: 0.9rem;
}

/* ---------- フッター ---------- */
.site-footer {
  background: var(--color-indigo-dark);
  color: #cdd6e0;
  padding: 56px 0 28px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-grid h4 { color: var(--color-kinari); font-size: 0.95rem; margin-bottom: 16px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: #cdd6e0; font-size: 0.88rem; }
.footer-grid a:hover { color: var(--color-white); }

.footer-bottom {
  border-top: 1px solid #33455e;
  padding-top: 20px;
  text-align: center;
  font-size: 0.78rem;
  color: #93a1b3;
}

/* ---------- 法定表記テーブル ---------- */
.legal-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.legal-table th, .legal-table td {
  text-align: left;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  vertical-align: top;
  font-size: 0.92rem;
}
.legal-table th { width: 25%; background: var(--color-kinari-deep); color: var(--color-sumi-light); font-weight: 500; }

/* ---------- レスポンシブ ---------- */
@media (max-width: 860px) {
  .main-nav, .header-actions .header-actions-links { display: none; }
  .nav-toggle { display: block; }
  .product-detail, .story-block, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .cart-summary { margin-left: 0; max-width: none; }
  .main-nav.open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-kinari);
    border-bottom: 1px solid var(--color-line);
    padding: 12px 24px 24px;
  }
  .main-nav.open ul { flex-direction: column; gap: 14px; }
}

@media (max-width: 480px) {
  .header-inner { padding: 14px 16px; }
  .hero { padding: 64px 16px; }
  .section { padding: 52px 0; }
}