/* ── Layout ─────────────────────────────────────────────── */
    .layout { display: flex; min-height: 100vh; }

    /* ── Sidebar ────────────────────────────────────────────── */
    .sidebar {
      width: var(--sidebar-w);
      background: var(--pwc-dark);
      color: #fff;
      position: fixed; top: 0; left: 0;
      height: 100vh;
      display: flex; flex-direction: column;
      z-index: 100;
      overflow-y: auto;
    }
    .sb-logo {
      padding: 22px 24px 18px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .sb-wordmark { font-size: 22px; font-weight: 700; color: var(--pwc-orange); letter-spacing: -.5px; }
    .sb-sys { font-size: 10.5px; color: rgba(255,255,255,0.45); margin-top: 3px; letter-spacing: .6px; text-transform: uppercase; }
    .sb-section { font-size: 10px; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.30); padding: 18px 24px 5px; }
    .nav-item {
      display: flex; align-items: center; gap: 10px;
      padding: 11px 24px;
      cursor: pointer;
      color: rgba(255,255,255,0.65);
      font-size: 13.5px;
      border-left: 3px solid transparent;
      transition: background .12s, color .12s;
    }
    .nav-item:hover { background: rgba(255,255,255,0.05); color: #fff; }
    .nav-item.active { background: rgba(208,74,2,0.15); color: #fff; border-left-color: var(--pwc-orange); }

    /* ════════════════════════════════════════════════════════════
       Keyboard Cheat Sheet (B-7)
       ════════════════════════════════════════════════════════════ */
    .kb-mask {
      display: none;
      position: fixed; inset: 0;
      background: rgba(0,0,0,0.5);
      z-index: 250;
      backdrop-filter: blur(3px);
    }
    .kb-mask.open { display: flex; align-items: center; justify-content: center; }
    .kb-modal {
      background: #fff;
      border-radius: 8px;
      box-shadow: 0 12px 40px rgba(0,0,0,0.25);
      width: 560px; max-width: 90vw;
      max-height: 80vh;
      overflow-y: auto;
      padding: 0;
    }
    .kb-head {
      padding: 16px 22px;
      border-bottom: 1px solid var(--pwc-border);
      display: flex; align-items: center; gap: 8px;
    }
    .kb-head h3 { font-size: 15px; font-weight: 700; margin: 0; color: var(--pwc-dark); }
    .kb-head-close {
      margin-left: auto;
      background: transparent; border: none; cursor: pointer; color: var(--pwc-mid);
      padding: 4px; border-radius: 4px;
    }
    .kb-head-close:hover { background: var(--pwc-bg); }
    .kb-body { padding: 16px 22px 20px; }
    .kb-section { margin-bottom: 16px; }
    .kb-section h4 {
      font-size: 10.5px; font-weight: 700; color: var(--pwc-mid);
      letter-spacing: 1px; text-transform: uppercase;
      margin-bottom: 8px;
    }
    .kb-row {
      display: flex; align-items: center; gap: 10px;
      padding: 7px 0;
      font-size: 12.5px;
      border-bottom: 1px solid #F5F5F5;
    }
    .kb-row:last-child { border-bottom: none; }
    .kb-row .kb-keys { display: inline-flex; gap: 4px; flex-shrink: 0; }
    .kb-key {
      display: inline-flex; align-items: center; justify-content: center;
      min-width: 22px; height: 22px;
      padding: 0 6px;
      background: #F5F5F5;
      border: 1px solid #DCDCDC;
      border-bottom-width: 2px;
      border-radius: 4px;
      font-family: monospace; font-size: 11px; font-weight: 700;
      color: var(--pwc-dark);
    }
    .kb-row .kb-desc { color: var(--pwc-dark); }
    .kb-plus { color: var(--pwc-mid); font-size: 11px; align-self: center; }

    /* Chord hint toast */
    .kb-toast {
      position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
      background: rgba(45,45,45,0.92); color: #fff;
      padding: 10px 18px; border-radius: 6px;
      font-size: 12.5px;
      z-index: 260;
      display: none;
      box-shadow: 0 4px 14px rgba(0,0,0,0.25);
    }
    .kb-toast.show { display: flex; align-items: center; gap: 8px; }
    .kb-toast .kb-key { background: rgba(255,255,255,0.18); border-color: rgba(255,255,255,0.3); color: #fff; }

    /* ════════════════════════════════════════════════════════════
       Inline Help Drawer (B-3)
       ════════════════════════════════════════════════════════════ */
    .help-icon {
      display: inline-flex; align-items: center; justify-content: center;
      width: 18px; height: 18px;
      border-radius: 50%;
      background: var(--blue-lt);
      color: var(--blue);
      font-size: 11px; font-weight: 700;
      cursor: pointer;
      border: 1px solid #BFD9F2;
      vertical-align: middle;
      flex-shrink: 0;
      margin-left: 6px;
      transition: background .12s, transform .12s;
    }
    .help-icon:hover { background: var(--blue); color: #fff; transform: scale(1.1); }
    .help-icon::before { content: "ⓘ"; }

    .help-mask {
      display: none;
      position: fixed; inset: 0;
      background: rgba(0,0,0,0.3);
      z-index: 195;
      backdrop-filter: blur(2px);
    }
    .help-mask.open { display: block; }
    .help-drawer {
      position: fixed; top: 0; right: 0;
      width: 480px; max-width: 100vw;
      height: 100vh;
      background: #fff;
      box-shadow: -2px 0 16px rgba(0,0,0,0.18);
      z-index: 200;
      transform: translateX(100%);
      transition: transform .25s ease;
      display: flex; flex-direction: column;
    }
    .help-drawer.open { transform: translateX(0); }
    .help-head {
      padding: 16px 20px;
      border-bottom: 1px solid var(--pwc-border);
      display: flex; align-items: flex-start; gap: 10px;
      background: linear-gradient(180deg, #F0F7FF 0%, #fff 100%);
    }
    .help-head h3 { font-size: 15px; font-weight: 700; color: var(--pwc-dark); margin: 0; }
    .help-head .help-sub { font-size: 11px; color: var(--pwc-mid); margin-top: 2px; }
    .help-head-close {
      margin-left: auto;
      background: transparent; border: none; cursor: pointer;
      padding: 4px; color: var(--pwc-mid);
      border-radius: 4px;
      flex-shrink: 0;
    }
    .help-head-close:hover { background: var(--pwc-bg); color: var(--pwc-dark); }
    .help-body { flex: 1; overflow-y: auto; padding: 18px 20px; font-size: 12.5px; color: var(--pwc-dark); line-height: 1.7; }
    .help-body h4 {
      font-size: 12.5px; font-weight: 700; color: var(--pwc-dark);
      margin-top: 18px; margin-bottom: 6px;
      display: flex; align-items: center; gap: 6px;
    }
    .help-body h4:first-child { margin-top: 0; }
    .help-body p { margin-bottom: 10px; }
    .help-body blockquote {
      margin: 8px 0;
      padding: 10px 14px;
      background: var(--pwc-bg-form);
      border-left: 3px solid var(--blue);
      font-size: 11.5px;
      color: var(--pwc-dark);
      border-radius: 0 4px 4px 0;
    }
    .help-body blockquote .source {
      display: block;
      font-size: 10.5px;
      color: var(--pwc-mid);
      margin-top: 6px;
      font-style: normal;
    }
    .help-body .help-faq {
      background: var(--pwc-bg-form);
      border-radius: 6px;
      padding: 10px 14px;
      margin-bottom: 6px;
      font-size: 11.5px;
    }
    .help-body .help-faq b { display: block; color: var(--pwc-orange); margin-bottom: 4px; }
    .help-body .help-links {
      display: flex; flex-direction: column; gap: 4px;
      font-size: 11.5px;
    }
    .help-body .help-links a {
      color: var(--blue);
      text-decoration: underline;
      display: inline-flex; align-items: center; gap: 4px;
    }
    .help-foot {
      padding: 10px 20px;
      border-top: 1px solid var(--pwc-border);
      background: #FAFAFA;
      font-size: 11px; color: var(--pwc-mid);
    }

    /* ════════════════════════════════════════════════════════════
       Unsaved Changes Guard (B-4)
       ════════════════════════════════════════════════════════════ */
    .save-state {
      display: inline-flex; align-items: center; gap: 5px;
      font-size: 11px; font-weight: 500;
      padding: 3px 9px; border-radius: 12px;
      background: transparent;
      transition: background .15s, color .15s;
      white-space: nowrap;
    }
    .save-state.dirty {
      background: var(--amber-lt); color: var(--amber-text);
      border: 1px solid #F0CC7A;
    }
    .save-state.dirty::before {
      content: ""; width: 6px; height: 6px; border-radius: 50%;
      background: var(--amber); display: inline-block;
      animation: pulseDot 1.4s ease-in-out infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.3; }
    }
    .save-state.saved {
      background: var(--green-lt); color: var(--green);
      border: 1px solid #A8D8B9;
    }
    .save-state.idle { display: none; }
    .save-state .save-time { font-family: monospace; font-size: 10px; opacity: .8; }

    /* ════════════════════════════════════════════════════════════
       活動中心 (B-2)
       ════════════════════════════════════════════════════════════ */
    .ac-mask {
      display: none;
      position: fixed; inset: 0;
      background: rgba(0,0,0,0.3);
      z-index: 195;
      backdrop-filter: blur(2px);
    }
    .ac-mask.open { display: block; }
    .ac-drawer {
      position: fixed; top: 0; right: 0;
      width: 440px; max-width: 100vw;
      height: 100vh;
      background: #fff;
      box-shadow: -2px 0 16px rgba(0,0,0,0.18);
      z-index: 200;
      transform: translateX(100%);
      transition: transform .25s ease;
      display: flex; flex-direction: column;
    }
    .ac-drawer.open { transform: translateX(0); }
    .ac-head {
      padding: 14px 18px;
      border-bottom: 1px solid var(--pwc-border);
      display: flex; align-items: center; gap: 10px;
    }
    .ac-head h3 { font-size: 15px; font-weight: 700; color: var(--pwc-dark); margin: 0; }
    .ac-head-close {
      margin-left: auto;
      background: transparent; border: none; cursor: pointer;
      padding: 4px; color: var(--pwc-mid);
      border-radius: 4px;
    }
    .ac-head-close:hover { background: var(--pwc-bg); color: var(--pwc-dark); }
    .ac-tabs {
      display: flex; gap: 0;
      border-bottom: 1px solid var(--pwc-border);
      background: #FAFAFA;
    }
    .ac-tab {
      flex: 1; padding: 10px 12px;
      font-size: 12px; font-weight: 600;
      background: transparent; border: none; cursor: pointer;
      color: var(--pwc-mid);
      border-bottom: 2px solid transparent;
    }
    .ac-tab.active { color: var(--pwc-orange); border-bottom-color: var(--pwc-orange); background: #fff; }
    .ac-tab .ac-tab-count {
      display: inline-block; margin-left: 4px;
      background: var(--pwc-bg); color: var(--pwc-mid);
      padding: 1px 6px; border-radius: 9px; font-size: 10.5px;
    }
    .ac-tab.active .ac-tab-count { background: var(--pwc-orange); color: #fff; }
    .ac-list { flex: 1; overflow-y: auto; padding: 8px 0; }
    .ac-item {
      display: flex; gap: 10px; align-items: flex-start;
      padding: 12px 18px;
      border-bottom: 1px solid #F0F0F0;
      cursor: pointer;
      transition: background .12s;
    }
    .ac-item:hover { background: #FAFAFA; }
    .ac-item-icon {
      width: 28px; height: 28px; border-radius: 6px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0; font-size: 14px; font-weight: 700;
    }
    .ac-item-icon.alarm { background: var(--red-lt); color: var(--red); }
    .ac-item-icon.warn { background: var(--amber-lt); color: var(--amber-text); }
    .ac-item-icon.info { background: var(--blue-lt); color: var(--blue); }
    .ac-item-icon.done { background: var(--green-lt); color: var(--green); }
    .ac-item-body { flex: 1; min-width: 0; }
    .ac-item-title { font-size: 12.5px; font-weight: 600; color: var(--pwc-dark); }
    .ac-item-desc { font-size: 11px; color: var(--pwc-mid); margin-top: 2px; line-height: 1.4; }
    .ac-item-meta {
      font-size: 10px; color: var(--pwc-mid); margin-top: 4px;
      display: flex; gap: 8px; flex-wrap: wrap;
    }
    .ac-item-meta .ac-cat {
      background: var(--pwc-bg); padding: 1px 6px; border-radius: 8px; font-weight: 600;
    }
    .ac-foot {
      padding: 10px 18px;
      border-top: 1px solid var(--pwc-border);
      background: #FAFAFA;
      font-size: 11px; color: var(--pwc-mid);
      display: flex; justify-content: space-between; align-items: center;
    }
    .ac-empty {
      padding: 40px 20px; text-align: center;
      color: var(--pwc-mid); font-size: 12.5px;
    }

    /* ════════════════════════════════════════════════════════════
       Role-Scoped Sidebar (B-1 ②)/* ════════════════════════════════════════════════════════════
       Role-Scoped Sidebar (B-1 ②)
       ════════════════════════════════════════════════════════════ */
    body[data-role="operator"] .sb-section:not([data-roles~="operator"]),
    body[data-role="operator"] .nav-item:not([data-roles~="operator"]) { display: none; }
    body[data-role="engineer"] .sb-section:not([data-roles~="engineer"]),
    body[data-role="engineer"] .nav-item:not([data-roles~="engineer"]) { display: none; }
    body[data-role="auditor"] .sb-section:not([data-roles~="auditor"]),
    body[data-role="auditor"] .nav-item:not([data-roles~="auditor"]) { display: none; }
    /* admin: no rule = show all */

    /* Inbox 項目 role 過濾 (B-5) */
    body[data-role="operator"] .inbox-item:not([data-roles~="operator"]) { display: none; }
    body[data-role="engineer"] .inbox-item:not([data-roles~="engineer"]) { display: none; }
    body[data-role="auditor"] .inbox-item:not([data-roles~="auditor"]) { display: none; }

    /* 角色切換 fade transition (B-5) */
    .sidebar, .page.active, .compliance-bar {
      transition: opacity .18s ease;
    }
    body.role-switching .sidebar,
    body.role-switching .page.active {
      opacity: 0.4;
    }

    /* 申請準備度（compliance-bar）僅在申請中心顯示 — 其他頁面隱藏 */
    .compliance-bar { display: none; }
    body[data-page="hub"] .compliance-bar { display: block; }

    /* 數據中心相關頁面 SSOT 卡 hover */
    .dc-related-item:hover { background: #FAFAFA; }