:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-bg: #eff6ff;
    --sidebar-bg: #131c2e;
    --sidebar-bg-active: #1f2c47;
    --sidebar-text: #b9c3d6;
    --sidebar-text-active: #ffffff;
    --bg-app: #f3f5f9;
    --card-bg: #ffffff;
    --border: #e2e6ee;
    --text: #1f2937;
    --muted: #6b7280;
    --muted-2: #9aa4b2;
    --success: #0ca30c;
    --success-bg: #e7f8ed;
    --warning: #b8790f;
    --warning-bg: #fef3e2;
    --danger: #d03b3b;
    --danger-bg: #fde8e8;
    --neutral-bg: #eef0f4;
    --radius: 8px;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-app);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
  }
  a { color: inherit; text-decoration: none; }

  /* ---------- layout ---------- */
  .app { display: flex; min-height: 100vh; }
  .sidebar {
    width: 232px;
    flex-shrink: 0;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
  }
  .sidebar-brand {
    padding: 20px 18px;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .sidebar-brand small {
    display: block;
    font-weight: 400;
    font-size: 11px;
    color: var(--muted-2);
    margin-top: 4px;
  }
  .nav-group { padding: 14px 10px; }
  .nav-group-label {
    font-size: 11px;
    color: var(--muted-2);
    padding: 4px 10px;
    letter-spacing: .04em;
    text-transform: uppercase;
  }
  .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13.5px;
    margin-bottom: 2px;
  }
  .nav-item:hover { background: rgba(255,255,255,0.06); }
  .nav-item.active { background: var(--primary); color: #fff; }
  .nav-icon { width: 18px; text-align: center; opacity: .9; }
  .nav-footer {
    margin-top: auto;
    padding: 14px 18px;
    font-size: 11px;
    color: var(--muted-2);
    border-top: 1px solid rgba(255,255,255,0.08);
  }

  .main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
  .topbar {
    height: 56px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 5;
  }
  .breadcrumb { font-size: 12.5px; color: var(--muted); }
  .breadcrumb b { color: var(--text); font-weight: 600; }
  .topbar-right { display: flex; align-items: center; gap: 14px; font-size: 12.5px; color: var(--muted); }
  .user-chip {
    display: flex; align-items: center; gap: 8px;
    background: var(--neutral-bg); padding: 6px 12px; border-radius: 20px;
  }
  .avatar {
    width: 24px; height: 24px; border-radius: 50%;
    background: var(--primary); color: #fff; font-size: 11px;
    display: flex; align-items: center; justify-content: center; font-weight: 600;
  }
  .role-pill {
    font-size: 11px; font-weight: 700; color: var(--primary); background: var(--primary-bg);
    padding: 3px 9px; border-radius: 20px;
  }

  .content { padding: 24px 28px 60px; max-width: 1240px; }
  .view { display: none; }
  .view.active { display: block; }

  .page-head {
    display: flex; align-items: flex-start; justify-content: space-between;
    margin-bottom: 18px; gap: 16px; flex-wrap: wrap;
  }
  .page-title { font-size: 20px; font-weight: 700; margin: 0 0 4px; }
  .page-sub { color: var(--muted); font-size: 12.5px; }
  .page-actions { display: flex; gap: 8px; flex-shrink: 0; }

  .btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 16px; border-radius: 6px; font-size: 13px; font-weight: 600;
    border: 1px solid var(--border); background: #fff; color: var(--text); cursor: pointer;
  }
  .btn:hover { background: var(--neutral-bg); }
  .btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
  .btn-primary:hover { background: var(--primary-dark); }
  .btn-danger-outline { color: var(--danger); border-color: #f0c4c4; background: #fff; }
  .btn-danger-outline:hover { background: var(--danger-bg); }
  .btn-danger-solid { background: var(--danger); border-color: var(--danger); color: #fff; }
  .btn-danger-solid:hover { background: #b32f2f; }
  .btn-sm { padding: 6px 12px; font-size: 12px; }

  .card {
    background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
    margin-bottom: 18px;
  }
  .card-header {
    padding: 14px 18px 4px;
    font-size: 13.5px; font-weight: 700; display: flex; justify-content: space-between; align-items: center;
  }
  .card-body { padding: 18px; }

  /* search panel */
  .search-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px 16px;
  }
  .search-grid.advanced { display: none; margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--border); }
  .search-advanced-toggle { margin-top: 14px; }
  /* search panel: tightened vertical rhythm so the panel doesn't crowd out the list below (v6/v7) */
  .card-header + .card-body { padding-top: 6px; padding-bottom: 13px; }
  .card-header + .card-body .search-grid { gap: 9px 16px; }
  .card-header + .card-body .search-grid.advanced { margin-top: 10px; padding-top: 10px; }
  .card-header + .card-body .search-advanced-toggle { margin-top: 10px; }
  .card-header + .card-body .search-actions { margin-top: 10px; }
  .card-header + .card-body .field label { margin-bottom: 3px; }
  .card-header + .card-body .field input[type=text],
  .card-header + .card-body .field input[type=date],
  .card-header + .card-body .field input[type=number],
  .card-header + .card-body .field select { padding: 6px 9px; }
  .toggle-btn {
    background: none; border: none; color: var(--primary); font-weight: 600; font-size: 12.5px;
    cursor: pointer; padding: 4px 0; font-family: inherit;
  }
  .field label {
    display: block; font-size: 11.5px; color: var(--muted); margin-bottom: 5px; font-weight: 600;
  }
  .field input[type=text], .field input[type=date], .field input[type=number], .field select, .field textarea {
    width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
    font-size: 13px; background: #fbfcfe; color: var(--text); font-family: inherit;
  }
  .field textarea { resize: vertical; }
  .search-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }

  /* table */
  table { width: 100%; border-collapse: collapse; font-size: 13px; }
  thead th {
    text-align: left; padding: 10px 14px; background: #f8f9fc; color: var(--muted);
    font-size: 11.5px; font-weight: 700; border-bottom: 1px solid var(--border); white-space: nowrap;
  }
  tbody td { padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
  tbody tr.clickable { cursor: pointer; }
  tbody tr.clickable:hover { background: var(--primary-bg); }
  td.num { text-align: right; font-variant-numeric: tabular-nums; }
  .cell-sub { color: var(--muted); font-size: 11.5px; }

  .badge {
    display: inline-block; padding: 3px 9px; border-radius: 20px; font-size: 11px; font-weight: 700;
  }
  .badge-success { background: var(--success-bg); color: var(--success); }
  .badge-warning { background: var(--warning-bg); color: var(--warning); }
  .badge-danger  { background: var(--danger-bg); color: var(--danger); }
  .badge-neutral { background: var(--neutral-bg); color: var(--muted); }

  .table-foot {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 18px; font-size: 12px; color: var(--muted);
  }
  .pager { display: flex; gap: 4px; }
  .pager button, .pager a {
    min-width: 28px; height: 28px; padding: 0 6px; border-radius: 6px; border: 1px solid var(--border);
    background: #fff; cursor: pointer; font-size: 12px; white-space: nowrap;
    display: inline-flex; align-items: center; justify-content: center;
  }
  .pager button.active, .pager a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
  .pager button[disabled] { cursor: default; color: var(--muted-2); }

  /* inline edit (customer sub rows) */
  .inline-edit-input {
    width: 100%; padding: 6px 8px; border: 1px solid var(--primary); border-radius: 4px;
    font-size: 12.5px; font-family: inherit;
  }
  .row-actions-inline { display: inline-flex; gap: 10px; }

  /* detail */
  .detail-head {
    display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap;
  }
  .detail-id { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
  .detail-title { font-size: 19px; font-weight: 700; margin: 0 0 6px; }
  .detail-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

  .kv-grid {
    display: grid; grid-template-columns: 220px 1fr; gap: 0;
    border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  }
  .kv-row { display: contents; }
  .kv-k, .kv-v {
    padding: 11px 16px; border-bottom: 1px solid var(--border); font-size: 13px;
  }
  .kv-k { background: #f8f9fc; color: var(--muted); font-weight: 600; }
  .kv-v { background: #fff; }
  .kv-grid .kv-row:last-child .kv-k, .kv-grid .kv-row:last-child .kv-v { border-bottom: none; }
  .kv-full { grid-column: 1 / -1; display: grid; grid-template-columns: 220px 1fr; }

  .tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--border); margin: 22px 0 0; flex-wrap: wrap; }
  .tab {
    padding: 10px 16px; font-size: 13px; font-weight: 600; color: var(--muted); cursor: pointer;
    border-bottom: 2px solid transparent; margin-bottom: -1px;
  }
  .tab.active { color: var(--primary); border-bottom-color: var(--primary); }
  .tab-panels { padding-top: 16px; }
  .tab-panel { display: none; }
  .tab-panel.active { display: block; }

  /* form */
  .form-section { margin-bottom: 22px; }
  .form-section-title {
    font-size: 13px; font-weight: 700; margin-bottom: 12px; padding-bottom: 8px;
    border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 8px;
  }
  .form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 20px; }
  .form-grid .full { grid-column: 1 / -1; }
  .required-mark { color: var(--danger); font-size: 11px; margin-left: 3px; }
  .field-hint { font-size: 11px; color: var(--muted-2); margin-top: 4px; }
  .readonly-input { background: var(--neutral-bg) !important; color: var(--muted); cursor: not-allowed; }
  .form-static-note {
    background: var(--neutral-bg); border-radius: 6px; padding: 10px 12px; font-size: 12.5px; color: var(--muted);
  }
  .form-actions {
    display: flex; justify-content: space-between; align-items: center;
    padding-top: 18px; border-top: 1px solid var(--border); margin-top: 8px;
  }

  .note-box {
    background: #fffaf0; border: 1px solid #f3dfb3; border-radius: var(--radius);
    padding: 12px 16px; font-size: 12.5px; color: #8a5a00; margin-bottom: 18px;
  }
  .note-box b { display: block; margin-bottom: 3px; }
  .note-box.decided { background: #eefaf0; border-color: #bfe6c6; color: #1e6b2e; }

  .link-btn { color: var(--primary); font-weight: 600; font-size: 12.5px; cursor: pointer; }

  .memo-list { display: flex; flex-direction: column; gap: 10px; }
  .memo-item {
    border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; background: #fff;
  }
  .memo-item .tag {
    display: inline-block; font-size: 10.5px; font-weight: 700; padding: 2px 8px; border-radius: 4px;
    background: var(--primary-bg); color: var(--primary); margin-bottom: 6px;
  }
  .memo-item .tag.decided { background: var(--success-bg); color: var(--success); }
  .memo-item h4 { margin: 0 0 6px; font-size: 13.5px; }
  .memo-item p { margin: 0; color: var(--muted); font-size: 12.5px; }
  .memo-item .decision {
    margin-top: 8px; background: var(--success-bg); color: #1e6b2e; border-radius: 6px;
    padding: 8px 10px; font-size: 12.5px; font-weight: 600;
  }

  .section-intro { color: var(--muted); font-size: 12.5px; margin: -8px 0 18px; }

  /* machine photos */
  .photo-thumb {
    width: 140px; height: 100px; background: var(--neutral-bg); border-radius: 6px;
    display: flex; align-items: center; justify-content: center; color: var(--muted-2);
    font-size: 11px; text-align: center;
  }
  .photo-upload-box {
    width: 140px; height: 100px; border-radius: 6px; border: 1.5px dashed #c7cede;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 4px; color: var(--primary); cursor: pointer; text-align: center; background: var(--primary-bg);
  }
  .photo-upload-box:hover { background: #e3ecfd; }

  /* role table */
  .role-table td, .role-table th { text-align: center; }
  .role-table td:first-child, .role-table th:first-child { text-align: left; }

  /* code master (2000番台) screen */
  .code-master-layout { display: flex; align-items: stretch; }
  .code-master-nav { width: 210px; flex-shrink: 0; border-right: 1px solid var(--border); padding: 8px 0; }
  .cm-nav-item {
    padding: 9px 18px; font-size: 12.5px; cursor: pointer; color: var(--text);
    border-left: 3px solid transparent;
  }
  .cm-nav-item:hover { background: var(--neutral-bg); }
  .cm-nav-item.active { background: var(--primary-bg); color: var(--primary); font-weight: 700; border-left-color: var(--primary); }
  .cm-code { color: var(--muted-2); font-size: 10.5px; margin-left: 3px; }
  .code-master-panel-wrap { flex: 1; padding: 18px 20px; min-width: 0; }
  .code-master-panel { display: none; }
  .code-master-panel.active { display: block; }
  .code-master-panel h3 { margin: 0 0 4px; font-size: 14px; }
  .code-master-panel .cm-sub { color: var(--muted); font-size: 12px; margin-bottom: 12px; }
  .cm-warn-box {
    background: #fffaf0; border: 1px solid #f3dfb3; border-radius: 6px;
    padding: 8px 12px; font-size: 12px; color: #8a5a00; margin-top: 12px;
  }

  /* modal + toast */
  .modal-overlay {
    position: fixed; inset: 0; background: rgba(15,23,42,0.45);
    display: none; align-items: center; justify-content: center; z-index: 50;
  }
  .modal-overlay.open { display: flex; }
  .modal-box {
    background: #fff; border-radius: 10px; padding: 22px 24px; width: 360px;
    box-shadow: 0 10px 40px rgba(0,0,0,.2);
  }
  .modal-box h3 { margin: 0 0 10px; font-size: 15px; }
  .modal-box p { margin: 0 0 18px; font-size: 13px; color: var(--muted); }
  .modal-actions { display: flex; justify-content: flex-end; gap: 8px; }
  .toast {
    position: fixed; bottom: 24px; right: 24px; background: #111827; color: #fff;
    padding: 12px 18px; border-radius: 8px; font-size: 13px; opacity: 0; transform: translateY(8px);
    transition: all .2s; pointer-events: none; z-index: 60; max-width: 320px;
  }
  .toast.show { opacity: 1; transform: translateY(0); }

  @media (max-width: 900px) {
    .search-grid { grid-template-columns: repeat(2, 1fr); }
    .form-grid { grid-template-columns: 1fr; }
    .kv-grid { grid-template-columns: 1fr; }
  }

  /* ==== 実画面（Django）実装で追加 ====
     モックアップはボタン/行の onclick でビューを切り替える単一HTMLだったため、
     実画面では a要素・form要素に置き換わる箇所のリンク色・装飾をここで補う。 */
  a.nav-item, a.link-btn, a.tab, tr.clickable a {
    color: inherit;
    text-decoration: none;
  }
  a.link-btn { color: var(--primary); }
  .nav-item-disabled {
    opacity: .4;
    cursor: default;
  }
  .nav-item-disabled:hover { background: none; }
  .nav-item-soon {
    font-size: 9.5px;
    margin-left: auto;
    background: rgba(255,255,255,0.08);
    padding: 1px 6px;
    border-radius: 4px;
  }
  .messages { margin-bottom: 16px; }
  .msg-box {
    padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 8px;
  }
  .msg-success { background: var(--success-bg); color: var(--success); }
  .msg-error { background: var(--danger-bg); color: var(--danger); }
  .errorlist { color: var(--danger); font-size: 11.5px; margin: 4px 0 0; padding-left: 16px; }
  form.inline-edit-form { display: inline; }
  button.link-btn {
    background: none; border: none; padding: 0; font: inherit; cursor: pointer;
  }
  .btn[disabled] { opacity: .5; cursor: default; }
  .btn[disabled]:hover { background: #fff; }