:root {
  --pri: #0b6cf5;
  --pri-dark: #084db0;
  --bg: #f5f7fb;
  --card: #ffffff;
  --line: #e4e8ef;
  --text: #1a2233;
  --muted: #6b7280;
  --ok: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.topbar {
  background: var(--pri);
  color: #fff;
  display: flex; align-items: center; flex-wrap: wrap;
  padding: 0 16px;
  position: sticky; top: 0; z-index: 100;
}
.topbar .brand a { color: #fff; font-weight: bold; text-decoration: none; padding: 14px 12px 14px 0; display: inline-block; }
.topbar nav { display: flex; flex-wrap: wrap; gap: 4px; flex: 1; }
.topbar nav a { color: #fff; text-decoration: none; padding: 14px 12px; border-radius: 4px; font-size: .9em; }
.topbar nav a:hover { background: rgba(255,255,255,0.12); }
.topbar .user-info { font-size: 0.9em; padding: 0 6px; }
.topbar .user-info a { color: #fff; margin-left: 8px; }
.menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 8px; margin-left: auto; }
.container { max-width: 1200px; margin: 24px auto; padding: 0 16px; }
h1 { margin-top: 0; }
h2 { border-bottom: 2px solid var(--line); padding-bottom: 6px; margin-top: 28px; }
section { margin-bottom: 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }

table.data { width: 100%; border-collapse: collapse; background: #fff; }
table.data th, table.data td { border: 1px solid var(--line); padding: 6px 10px; font-size: 0.94em; vertical-align: middle; }
table.data thead th { background: #eef2f7; }
table.data tr.low td { background: #fff3f3; }
table.data tr.inactive td { color: #aaa; text-decoration: line-through; }
table.data .num { text-align: right; font-variant-numeric: tabular-nums; }
table.kv { width: 100%; }
table.kv th { text-align: left; background: #eef2f7; width: 140px; padding: 8px; border-bottom: 1px solid var(--line); }
table.kv td { padding: 8px; border-bottom: 1px solid var(--line); }

form .grid-form, .grid-form {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px 14px;
  align-items: end;
}
.grid-form label { display: flex; flex-direction: column; font-size: 0.92em; color: var(--muted); }
.grid-form input, .grid-form select { padding: 6px 8px; border: 1px solid var(--line); border-radius: 4px; font-size: 1em; background: #fff; }
.grid-form .span2 { grid-column: span 2; }
@media (max-width: 700px) {
  form .grid-form { grid-template-columns: 1fr; }
}

button, .btn-primary, .btn-link {
  cursor: pointer; font-size: 1em;
}
button.btn-primary, .btn-primary {
  background: var(--pri); color: #fff; border: 0; border-radius: 4px; padding: 10px 16px; text-decoration: none; display: inline-block;
}
button.btn-primary:hover, .btn-primary:hover { background: var(--pri-dark); }
button.btn-link, .btn-link { background: transparent; color: var(--pri); border: 0; padding: 4px 6px; }
button.btn-link:hover, .btn-link:hover { text-decoration: underline; }
form.inline { display: inline-flex; gap: 6px; align-items: center; margin: 0; }
form.inline input[type=number] { width: 90px; padding: 4px 6px; }

.badge { padding: 2px 8px; border-radius: 999px; font-size: 0.82em; }
.badge.ok { background: #dcfce7; color: var(--ok); }
.badge.warn { background: #fef3c7; color: var(--warn); }
.badge.danger { background: #fee2e2; color: var(--danger); }

.login-box { max-width: 360px; margin: 80px auto; background: #fff; padding: 28px; border-radius: 10px; box-shadow: 0 6px 20px rgba(0,0,0,0.05); }
.login-box label { display: block; margin-bottom: 14px; }
.login-box input { width: 100%; padding: 10px; border: 1px solid var(--line); border-radius: 4px; font-size: 1em; }
.login-box .btn-primary { width: 100%; }
.login-box .hint { color: var(--muted); font-size: 0.85em; margin-top: 12px; }
.login-box .err { color: var(--danger); }

.mode-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; margin-bottom: 12px; }
.mode-switch a { padding: 8px 16px; text-decoration: none; color: var(--text); background: #fff; }
.mode-switch a.on { background: var(--pri); color: #fff; }
.msg { color: var(--ok); font-weight: bold; }

.low { color: var(--danger); }
.muted { color: var(--muted); }

/* Product images */
.product-thumb { width: 60px; height: 60px; object-fit: cover; border-radius: 6px; border: 1px solid var(--line); }
.no-image { display: inline-block; width: 60px; height: 60px; line-height: 60px; text-align: center; background: var(--bg); border-radius: 6px; font-size: .65rem; color: var(--muted); border: 1px dashed var(--line); }
.img-cell { position: relative; width: 120px; min-width: 120px; overflow: hidden; }
.img-upload-mini { margin-top: 2px; display: flex; align-items: center; gap: 2px; max-width: 100%; }
.img-upload-mini input[type="file"] { width: 70px; font-size: .6rem; opacity: .7; overflow: hidden; text-overflow: ellipsis; }
.img-upload-mini input[type="file"]:hover { opacity: 1; }
.img-upload-mini .btn-camera-sm { flex-shrink: 0; font-size: 1.1rem; padding: 2px; cursor: pointer; background: none; border: none; }
.active-filter { font-weight: bold; color: var(--pri); }

/* ===== テーブル横スクロール ===== */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 -4px; padding: 0 4px; }

/* ===== モバイル（768px以下）===== */
@media (max-width: 768px) {
  /* ナビ: ハンバーガー切替 */
  .menu-toggle { display: block; }
  .topbar { flex-wrap: wrap; padding: 0 12px; }
  .topbar .brand a { font-size: .95em; padding: 12px 8px 12px 0; }
  .topbar nav {
    display: none; flex-basis: 100%; flex-direction: column; gap: 0;
    background: var(--pri-dark); margin: 0 -12px; padding: 4px 0;
  }
  .topbar nav.open { display: flex; }
  .topbar nav a { padding: 12px 20px; border-radius: 0; font-size: .95em; border-bottom: 1px solid rgba(255,255,255,.08); }
  .topbar .user-info { flex-basis: 100%; padding: 8px 0; font-size: .82em; text-align: right; order: -1; }

  /* コンテナ */
  .container { margin: 12px auto; padding: 0 10px; }
  h1 { font-size: 1.3em; }
  h2 { font-size: 1.1em; margin-top: 20px; }

  /* カード */
  .card { padding: 12px; border-radius: 6px; }

  /* フォーム: 常に1列 */
  form .grid-form, .grid-form { grid-template-columns: 1fr; gap: 8px; }
  .grid-form .span2 { grid-column: span 1; }
  .grid-form input, .grid-form select { font-size: 16px; /* iOSズーム防止 */ }

  /* テーブル */
  table.data th, table.data td { padding: 5px 6px; font-size: .82em; white-space: nowrap; }
  table.kv th { width: 100px; padding: 6px; font-size: .85em; }
  table.kv td { padding: 6px; font-size: .9em; }

  /* ボタン */
  button.btn-primary, .btn-primary { padding: 10px 14px; font-size: .95em; }
  form button.btn-primary { width: 100%; }
  a.btn-primary { display: inline-block; margin: 4px 4px 4px 0; }

  /* 商品写真 */
  .product-thumb { width: 44px; height: 44px; }
  .no-image { width: 44px; height: 44px; line-height: 44px; font-size: .55rem; }
  .img-cell { width: 90px; min-width: 90px; overflow: hidden; }
  .img-upload-mini { flex-direction: column; gap: 4px; align-items: flex-start; max-width: 100%; }
  .img-upload-mini input[type="file"] { width: 100%; max-width: 85px; font-size: .65rem; opacity: 1; overflow: hidden; }
  .img-upload-mini .btn-camera-sm { font-size: 1.2rem; padding: 4px 8px; }

  /* ログイン */
  .login-box { margin: 40px 12px; padding: 20px; }

  /* モードスイッチ */
  .mode-switch a { padding: 6px 12px; font-size: .9em; }
}

/* ===== iPhone SE 等の小型（375px以下）===== */
@media (max-width: 400px) {
  .topbar .brand a { font-size: .85em; }
  .container { padding: 0 6px; }
  h1 { font-size: 1.15em; }
  table.data th, table.data td { padding: 3px 4px; font-size: .75em; }
  .product-thumb { width: 36px; height: 36px; }
  .no-image { width: 36px; height: 36px; line-height: 36px; }
  .img-cell { width: 70px; min-width: 70px; overflow: hidden; }
  .img-upload-mini { flex-direction: column; gap: 2px; }
  .img-upload-mini input[type="file"] { width: 100%; max-width: 65px; font-size: .6rem; overflow: hidden; }
  button.btn-primary, .btn-primary { padding: 8px 10px; font-size: .9em; }
}