:root {
  --bg: #fafafa; --fg: #1a1a1a; --muted: #666; --card: #fff; --border: #e5e5e5;
  --accent: #2563eb; --accent-fg: #fff; --danger: #dc2626; --radius: 12px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif; background: var(--bg); color: var(--fg); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
.header { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.logo { font-weight: 800; font-size: 1.3rem; letter-spacing: .02em; }
.nav { display: flex; gap: 20px; }
.badge { background: var(--accent); color: var(--accent-fg); border-radius: 999px; padding: 0 8px; font-size: .8rem; }
.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px; min-height: 70vh; }
.footer { text-align: center; color: var(--muted); font-size: .85rem; padding: 24px; }

.hero { padding: 40px 0 24px; }
.hero h1 { margin: 0 0 8px; font-size: 2rem; }
.hero p { margin: 0; color: var(--muted); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 24px; }
.filters button { border: 1px solid var(--border); background: var(--card); padding: 6px 14px; border-radius: 999px; cursor: pointer; }
.filters button.active { background: var(--fg); color: #fff; border-color: var(--fg); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; cursor: pointer; transition: transform .15s, box-shadow .15s; }
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.08); }
.card .img { aspect-ratio: 1; display: flex; align-items: center; justify-content: center; font-size: 4rem; }
.card .body { padding: 14px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
.card .cat { font-size: .75rem; color: var(--muted); }
.card .name { font-weight: 600; }
.card .price { margin-top: auto; font-weight: 700; }

.btn { display: inline-block; border: none; border-radius: 8px; padding: 10px 18px; font-size: 1rem; cursor: pointer; background: var(--accent); color: var(--accent-fg); font-weight: 600; }
.btn.secondary { background: var(--card); color: var(--fg); border: 1px solid var(--border); }
.btn.sm { padding: 4px 10px; font-size: .85rem; }
.btn.danger { background: transparent; color: var(--danger); padding: 4px 8px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.detail .img { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); aspect-ratio: 1; display: flex; align-items: center; justify-content: center; font-size: 8rem; }
.detail h1 { margin: 0 0 8px; }
.detail .price { font-size: 1.6rem; font-weight: 700; margin: 12px 0; }
.detail .desc { color: var(--muted); }
.qty { display: inline-flex; align-items: center; gap: 8px; margin: 16px 0; }
.qty input { width: 60px; padding: 8px; border: 1px solid var(--border); border-radius: 8px; text-align: center; font-size: 1rem; }

.cart-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.cart-table th, .cart-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--border); }
.cart-table th { font-size: .85rem; color: var(--muted); font-weight: 600; }
.cart-table td.num { text-align: right; }
.summary { margin-top: 24px; display: flex; justify-content: flex-end; }
.summary-box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; min-width: 300px; }
.summary-box .row { display: flex; justify-content: space-between; padding: 4px 0; }
.summary-box .total { font-weight: 700; font-size: 1.2rem; border-top: 1px solid var(--border); margin-top: 8px; padding-top: 12px; }
.summary-box .btn { width: 100%; margin-top: 16px; }

.form { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; max-width: 560px; }
.form label { display: block; font-size: .9rem; font-weight: 600; margin: 12px 0 4px; }
.form input, .form select { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; }
.form .btn { margin-top: 20px; width: 100%; }
.empty { text-align: center; color: var(--muted); padding: 60px 0; }
.back { display: inline-block; margin-bottom: 16px; color: var(--muted); }
.thanks { text-align: center; padding: 60px 0; }
.thanks .big { font-size: 4rem; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--fg); color: #fff; padding: 10px 20px; border-radius: 999px; opacity: 0; transition: .2s; pointer-events: none; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 700px) {
  .detail { grid-template-columns: 1fr; }
  .cart-table th:nth-child(2), .cart-table td:nth-child(2) { display: none; }
}

/* --- auth / mypage / status --- */
.notice { background: #eff6ff; border: 1px solid #bfdbfe; padding: 10px 14px; border-radius: 8px; color: #1e40af; }
.error { color: var(--danger); min-height: 1.2em; margin: 8px 0 0; font-size: .9rem; }
.muted { color: var(--muted); font-size: .9rem; }
.link { color: var(--accent); text-decoration: underline; }
.admin-link { background: var(--fg); color: #fff; padding: 2px 10px; border-radius: 999px; font-size: .85rem; }
.soldout { color: var(--danger); font-size: .8rem; }
.low { color: #b45309; font-size: .8rem; }
.stock { color: var(--muted); margin: 0; }
.order { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.order-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; flex-wrap: wrap; }
.order ul { margin: 8px 0; padding-left: 20px; }
.order-foot { font-size: .9rem; color: var(--muted); }
.status { font-size: .8rem; padding: 2px 10px; border-radius: 999px; background: #e5e7eb; }
.s-pending { background: #fef3c7; color: #92400e; } .s-paid { background: #dbeafe; color: #1e40af; } .s-shipped { background: #e0e7ff; color: #3730a3; }
.s-completed { background: #dcfce7; color: #166534; } .s-cancelled { background: #fee2e2; color: #991b1b; }