/* ── リセット・ベース ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --clr-primary: #2563eb;
  --clr-primary-dark: #1d4ed8;
  --clr-danger:  #dc2626;
  --clr-warning: #d97706;
  --clr-success: #16a34a;
  --clr-bg:      #f8fafc;
  --clr-surface: #ffffff;
  --clr-border:  #e2e8f0;
  --clr-text:    #1e293b;
  --clr-muted:   #64748b;
  --radius:      0.5rem;
  --shadow:      0 1px 3px rgba(0,0,0,.12);
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
}

a { color: var(--clr-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── レイアウト ────────────────────────────────────────────────────── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

.main-content { padding: 2rem 1rem; }

/* ── ヘッダー ──────────────────────────────────────────────────────── */
.site-header {
  background: var(--clr-primary);
  color: #fff;
  padding: 0.75rem 0;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}

.site-header .container {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
}

.logo {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo:hover { text-decoration: none; }

.badge-demo {
  background: #fbbf24;
  color: #1e293b;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 0.25rem;
}

.nav-links { display: flex; gap: 1.25rem; align-items: center; }
.nav-links a { color: #fff; font-size: 0.9rem; display: flex; align-items: center; gap: 0.3rem; }
.nav-links a:hover { text-decoration: underline; }
.back-link { opacity: 0.6; border-left: 1px solid rgba(255,255,255,0.3); padding-left: 1.25rem; }
.demo-banner {
  background: #fbbf24;
  color: #1e293b;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.375rem 0;
}

.cart-link { position: relative; }
.cart-badge {
  background: #ef4444;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 9999px;
  padding: 0 0.4rem;
  min-width: 1.1rem;
  text-align: center;
}

/* ── フッター ──────────────────────────────────────────────────────── */
.site-footer {
  background: var(--clr-text);
  color: #94a3b8;
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.8rem;
  margin-top: 3rem;
}

/* ── ページヒーロー ────────────────────────────────────────────────── */
.page-hero {
  margin-bottom: 1.75rem;
}
.page-hero h1 { font-size: 1.75rem; margin-bottom: 0.4rem; }
.page-hero p  { color: var(--clr-muted); }

/* ── フィルターバー ────────────────────────────────────────────────── */
.filter-bar {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.filter-btn {
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--clr-border);
  border-radius: 9999px;
  font-size: 0.85rem;
  color: var(--clr-text);
  background: var(--clr-surface);
  transition: background .15s, color .15s;
}
.filter-btn:hover, .filter-btn.active {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
  text-decoration: none;
}

/* ── 商品グリッド ──────────────────────────────────────────────────── */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.product-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: box-shadow .15s;
}
.product-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.12); }
.product-card.out-of-stock { opacity: .65; }

.product-icon {
  background: #eff6ff;
  padding: 1.5rem;
  text-align: center;
  font-size: 2.5rem;
  color: var(--clr-primary);
}

.product-info { padding: 1rem; flex: 1; display: flex; flex-direction: column; gap: 0.5rem; }
.product-category { font-size: 0.75rem; color: var(--clr-muted); }
.product-name { font-size: 1rem; font-weight: 600; }
.product-price { font-size: 1.1rem; font-weight: 700; color: var(--clr-primary); }
.price-note { font-size: 0.75rem; font-weight: 400; color: var(--clr-muted); }

.stock-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
}
.stock-badge.in  { background: #dcfce7; color: var(--clr-success); }
.stock-badge.out { background: #fee2e2; color: var(--clr-danger); }

.add-form { margin-top: auto; display: flex; flex-direction: column; gap: 0.5rem; }
.form-row { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; }
.form-row label { min-width: 4.5rem; color: var(--clr-muted); }
.form-row select { flex: 1; }

/* ── ボタン ────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  transition: opacity .15s;
}
.btn:hover { opacity: .85; text-decoration: none; }
.btn-primary  { background: var(--clr-primary); color: #fff; }
.btn-danger   { background: var(--clr-danger);  color: #fff; }
.btn-warning  { background: var(--clr-warning); color: #fff; }
.btn-outline  { background: #fff; border-color: var(--clr-primary); color: var(--clr-primary); }
.btn-lg       { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-sm       { padding: 0.3rem 0.7rem; font-size: 0.8rem; }

select, input[type="text"], input[type="tel"] {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  width: 100%;
}
select:focus, input:focus { outline: 2px solid var(--clr-primary); outline-offset: 1px; }

/* ── カートページ ──────────────────────────────────────────────────── */
.cart-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 720px) { .cart-layout { grid-template-columns: 1fr; } }

.cart-items { display: flex; flex-direction: column; gap: 0.75rem; }

.cart-item {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.cart-item-info { flex: 1; }
.item-name  { font-weight: 600; margin-bottom: 0.25rem; }
.item-price { color: var(--clr-primary); }
.item-interval { font-size: 0.8rem; color: var(--clr-muted); margin-top: 0.2rem; }
.cart-item-actions { display: flex; gap: 0.5rem; align-items: center; }

.cart-summary {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.cart-summary h2 { font-size: 1.1rem; border-bottom: 1px solid var(--clr-border); padding-bottom: 0.5rem; }
.cart-summary dl { display: grid; grid-template-columns: 1fr auto; gap: 0.4rem 0; font-size: 0.9rem; }
.cart-summary dt { color: var(--clr-muted); }
.cart-summary dd { text-align: right; font-weight: 600; }
.total-label { font-weight: 700; }
.total-price { font-size: 1.2rem; color: var(--clr-primary); }

.empty-cart {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--clr-muted);
}
.empty-cart i { font-size: 3rem; margin-bottom: 1rem; display: block; }

.inline-form { display: inline; }

/* ── チェックアウト ────────────────────────────────────────────────── */
.checkout-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 720px) { .checkout-layout { grid-template-columns: 1fr; } }

.checkout-form-wrap {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.checkout-form-wrap h2 { margin-bottom: 1.25rem; font-size: 1.1rem; }

.checkout-form { display: flex; flex-direction: column; gap: 1rem; }
.field { display: flex; flex-direction: column; gap: 0.35rem; }
.field label { font-size: 0.9rem; font-weight: 600; }
.field small { color: var(--clr-muted); font-size: 0.8rem; }
.req { color: var(--clr-danger); font-size: 0.75rem; margin-left: 0.25rem; }

.payment-demo {
  background: #f1f5f9;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  color: var(--clr-muted);
  font-size: 0.9rem;
}

.checkout-summary {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.checkout-summary h2 { font-size: 1.1rem; border-bottom: 1px solid var(--clr-border); padding-bottom: 0.5rem; margin-bottom: 1rem; }
.summary-item { border-bottom: 1px solid var(--clr-border); padding: 0.5rem 0; font-size: 0.85rem; }
.s-name { font-weight: 600; }
.s-detail { color: var(--clr-muted); }
.s-price { text-align: right; }
.summary-total { margin-top: 0.75rem; }
.summary-total dl { display: grid; grid-template-columns: 1fr auto; gap: 0.3rem 0; font-size: 0.85rem; }
.summary-total dt { color: var(--clr-muted); }
.summary-total dd { text-align: right; font-weight: 600; }

/* ── マイサブスク ──────────────────────────────────────────────────── */
.subs-list { display: flex; flex-direction: column; gap: 1rem; }

.sub-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
}
.sub-card.status-paused { border-left: 4px solid var(--clr-warning); }
.sub-info { flex: 1; display: flex; flex-direction: column; gap: 0.35rem; }
.sub-name  { font-size: 1.05rem; font-weight: 600; }
.sub-detail { color: var(--clr-muted); font-size: 0.85rem; }
.sub-price { font-size: 0.9rem; }
.sub-status { font-size: 0.85rem; }
.sub-actions { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
}
.badge.active { background: #dcfce7; color: var(--clr-success); }
.badge.paused { background: #fef3c7; color: var(--clr-warning); }

/* ── 完了・エラーページ ────────────────────────────────────────────── */
.complete-wrap {
  text-align: center;
  padding: 4rem 1rem;
}
.complete-icon { font-size: 4rem; color: var(--clr-success); margin-bottom: 1rem; }
.complete-icon.error-icon { color: var(--clr-danger); }
.complete-wrap h1 { font-size: 1.75rem; margin-bottom: 0.75rem; }
.complete-wrap p { color: var(--clr-muted); margin-bottom: 1.5rem; }
.complete-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── アラート ──────────────────────────────────────────────────────── */
.alert { padding: 0.75rem 1rem; border-radius: var(--radius); margin-bottom: 1.25rem; }
.alert-error { background: #fee2e2; border: 1px solid #fca5a5; color: var(--clr-danger); }
.alert ul { margin: 0; padding-left: 1.25rem; }

.empty-msg { color: var(--clr-muted); }

/* ── お問い合わせ吹き出しボタン ────────────────────────────────────── */
.contact-bubble {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--clr-primary);
  color: #fff;
  padding: 0.65rem 1.1rem;
  border-radius: 9999px;
  font-size: 0.9rem;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(37,99,235,.4);
  text-decoration: none;
  transition: background .15s, transform .15s, box-shadow .15s;
}
.contact-bubble:hover {
  background: var(--clr-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,.5);
  text-decoration: none;
}
.contact-bubble i { font-size: 1.1rem; }