:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#1d2939;background:#f4f7fb}*{box-sizing:border-box}body{margin:0}.app-header{min-height:72px;background:#1565c0;color:white;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 2px 8px #0002}.app-header h1{margin:0;font-size:1.35rem}.app-header span{font-size:.85rem;opacity:.9}.container{max-width:1200px;margin:auto;padding:20px}.tabs{display:flex;gap:8px;overflow:auto;margin-bottom:18px}.tabs button,.secondary,.link-button{border:0;border-radius:10px;padding:12px 18px;background:white;color:#1565c0;font-weight:700;text-decoration:none;cursor:pointer}.tabs button.active{background:#1565c0;color:#fff}.panel{display:none}.panel.active{display:block}.panel h2{margin-top:0}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;padding-bottom:92px}.product-card,.stock-row,.history-row{background:#fff;border-radius:14px;padding:16px;box-shadow:0 3px 14px #2342}.product-card.alert,.stock-row.alert{border:2px solid #e65100}.product-card h3{margin:0 0 6px}.muted{color:#667085;font-size:.9rem}.counter{display:grid;grid-template-columns:44px 1fr 44px;align-items:center;gap:8px;margin-top:12px}.counter button{height:44px;border:0;border-radius:10px;font-size:1.5rem}.counter output{text-align:center;font-size:1.3rem;font-weight:800}.action-bar{position:fixed;left:0;right:0;bottom:0;background:#fff;padding:14px max(20px,calc((100vw - 1160px)/2));display:flex;justify-content:space-between;align-items:center;box-shadow:0 -3px 14px #0002}.primary{background:#1565c0;color:white;border:0;border-radius:10px;padding:13px 22px;font-weight:800;cursor:pointer}.primary:disabled{opacity:.45}.stock-list,.history-list{display:grid;gap:10px}.stock-row,.history-row{display:flex;justify-content:space-between;gap:16px;align-items:center}.badge{border-radius:999px;padding:5px 9px;background:#fff3e0;color:#bf360c;font-weight:700}.section-head{display:flex;justify-content:space-between;align-items:center}.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:#172b4d;color:#fff;padding:12px 18px;border-radius:10px;display:none}.toast.show{display:block}.login-page{min-height:100vh;display:grid;place-items:center;padding:20px}.login-card{width:min(430px,100%);background:white;border-radius:18px;padding:30px;box-shadow:0 10px 35px #2343}.login-card h1{color:#1565c0}.login-card label:not(.check){display:grid;gap:6px;margin:16px 0;font-weight:700}.login-card input[type=text],.login-card input[type=email],.login-card input[type=password]{padding:13px;border:1px solid #ccd5e0;border-radius:9px;font-size:1rem}.check{display:flex;gap:8px;align-items:center;margin:12px 0}.error{color:#b42318;margin:10px 0}.login-card .primary{width:100%;margin:10px 0}@media(max-width:600px){.container{padding:14px}.product-grid{grid-template-columns:1fr 1fr}.product-card{padding:12px}.app-header{padding:10px 14px}.stock-row,.history-row{align-items:flex-start;flex-direction:column}.action-bar{padding:12px 14px}}
.demo-box{margin-top:24px;background:#f0f4ff;border:1px solid #c7d5f8;border-radius:12px;padding:16px 18px}
.demo-title{margin:0 0 10px;font-weight:700;font-size:.9rem;color:#1e3a8a}
.demo-table{width:100%;border-collapse:collapse;font-size:.85rem}
.demo-table th{text-align:left;color:#475467;padding:4px 6px;border-bottom:1px solid #c7d5f8}
.demo-table td{padding:6px 6px;border-bottom:1px solid #e4ebff}
.demo-table tr:last-child td{border-bottom:0}
.fill-btn{background:none;border:none;color:#1565c0;cursor:pointer;font-size:.85rem;padding:0;text-decoration:underline;text-underline-offset:2px}
.fill-btn:hover{color:#0d47a1}
.demo-note{margin:10px 0 0;font-size:.78rem;color:#667085}

/* ── 管理者メニュー ── */
.admin-tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap}
.admin-tab-btn{padding:8px 16px;border:1px solid var(--border,#ddd);border-radius:8px;background:#fff;cursor:pointer;font-size:.9rem}
.admin-tab-btn.active{background:#1565c0;color:#fff;border-color:#1565c0}
.admin-panel{display:none}.admin-panel.active{display:block}
.admin-list{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.admin-item{background:#fff;border:1px solid #e0e0e0;border-radius:10px;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.admin-item-info{flex:1}.admin-item-info strong{font-size:1rem}.admin-item-info .muted{font-size:.82rem;color:#666;margin-top:2px}
.admin-item-actions{display:flex;gap:8px;flex-shrink:0}
.btn-edit{padding:6px 14px;border:1px solid #1565c0;color:#1565c0;background:#fff;border-radius:6px;cursor:pointer;font-size:.85rem}
.btn-edit:hover{background:#e3f0ff}
.btn-delete{padding:6px 14px;border:1px solid #c62828;color:#c62828;background:#fff;border-radius:6px;cursor:pointer;font-size:.85rem}
.btn-delete:hover{background:#ffebee}
.add-category-form{display:flex;gap:8px;margin-bottom:12px}
.add-category-form input{flex:1;padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-size:1rem}
.alert-item{background:#fff8e1;border:1px solid #ffe082;border-radius:10px;padding:14px 16px}
.alert-item strong{color:#e65100}

/* ── モーダル ── */
.modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;border-radius:16px;padding:24px;width:90%;max-width:480px;z-index:200;box-shadow:0 8px 32px rgba(0,0,0,.2)}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:199}
.modal h3{margin:0 0 16px;font-size:1.1rem}
.modal label{display:flex;flex-direction:column;gap:4px;margin-bottom:12px;font-size:.9rem;color:#444}
.modal input,.modal select{padding:10px 12px;border:1px solid #ddd;border-radius:8px;font-size:1rem}
.modal-buttons{display:flex;gap:8px;margin-top:16px}
.modal-buttons button{flex:1;padding:12px}

/* ── 商品画像 ── */
.product-img{width:100%;height:140px;object-fit:cover;border-radius:10px;margin-bottom:8px}
.image-preview{margin-bottom:8px}.image-preview img{width:100%;max-height:160px;object-fit:cover;border-radius:8px;border:1px solid #e0e0e0}
.admin-item-thumb{width:56px;height:56px;object-fit:cover;border-radius:8px;flex-shrink:0}