@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans+KR:wght@300;400;500;600&display=swap');
  :root {
    --bg:#0a0e14;--surface:#111620;--surface2:#1a2030;--border:#1e2a3a;--border2:#243040;
    --accent:#e05c2a;--accent2:#ff7a45;--green:#2eba7a;--yellow:#f5a623;--red:#e03a3a;
    --text:#d4dce8;--text2:#7a8fa8;--text3:#3a4f68;
    --mono:'IBM Plex Mono',monospace;--sans:'IBM Plex Sans KR',sans-serif;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  body{background:var(--bg);color:var(--text);font-family:var(--sans);min-height:100vh;}
  .shell{display:flex;height:100vh;overflow:hidden;}

  .sidebar{width:220px;flex-shrink:0;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;}
  .logo{padding:20px 20px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px;}
  .logo-icon{width:32px;height:32px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;}
  .logo-text{font-family:var(--mono);font-size:13px;font-weight:600;color:var(--text);letter-spacing:.5px;}
  .logo-sub{font-size:9px;color:var(--text2);letter-spacing:1px;text-transform:uppercase;}
  .nav{padding:12px 8px;flex:1;}
  .nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:4px;font-size:12.5px;color:var(--text2);cursor:pointer;transition:all .15s;margin-bottom:2px;border:1px solid transparent;}
  .nav-item:hover{background:var(--surface2);color:var(--text);}
  .nav-item.active{background:var(--surface2);color:var(--text);border-color:var(--border2);}
  .nav-item.active .nav-dot{background:var(--accent);}
  .nav-dot{width:5px;height:5px;border-radius:50%;background:var(--text3);flex-shrink:0;}
  .nav-section{font-family:var(--mono);font-size:9px;color:var(--text3);letter-spacing:1.5px;text-transform:uppercase;padding:16px 12px 6px;}
  /* 역할 기반 메뉴 제어 */
  /* admin-only: ADMIN 전용 / staff-only: ADMIN + BUILDING_ADMIN(관리 화면) */
  .admin-only { display: none; }
  body.role-admin .admin-only { display: flex; }
  body.role-admin .nav-section.admin-only { display: block; }
  .staff-only { display: none; }
  body.role-admin .staff-only,
  body.role-building-admin .staff-only { display: flex; }
  body.role-admin .nav-section.staff-only,
  body.role-building-admin .nav-section.staff-only { display: block; }
  .sidebar-footer{padding:12px;border-top:1px solid var(--border);}
  .user-badge{display:flex;align-items:center;gap:8px;padding:8px;background:var(--surface2);border-radius:4px;cursor:pointer;}
  .user-badge:hover{border:1px solid var(--border2);}
  .user-avatar{width:26px;height:26px;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:600;}
  .user-info{font-size:11px;flex:1;}
  .user-name{color:var(--text);font-weight:500;}
  .user-role{color:var(--text2);font-family:var(--mono);font-size:9px;}
  .logout-btn{font-size:10px;color:var(--text2);cursor:pointer;padding:2px 6px;border:1px solid var(--border2);border-radius:2px;}
  .logout-btn:hover{color:var(--red);border-color:var(--red);}

  .main{flex:1;display:flex;flex-direction:column;overflow:hidden;}
  .topbar{height:52px;flex-shrink:0;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 24px;justify-content:space-between;}
  .topbar-title{font-family:var(--mono);font-size:13px;color:var(--text);}
  .topbar-path{font-size:11px;color:var(--text2);}
  .topbar-actions{display:flex;gap:8px;}

  .tab-page{display:none;flex:1;overflow-y:auto;padding:24px;flex-direction:column;gap:20px;}
  .tab-page.active{display:flex;}

  .btn{padding:7px 14px;font-size:12px;font-family:var(--sans);border:1px solid var(--border2);background:var(--surface2);color:var(--text);cursor:pointer;transition:all .15s;display:flex;align-items:center;gap:6px;border-radius:3px;}
  .btn:hover{border-color:var(--accent);color:var(--accent);}
  .btn-primary{background:var(--accent);border-color:var(--accent);color:#fff;}
  .btn-primary:hover{background:var(--accent2);border-color:var(--accent2);color:#fff;}
  .btn-sm{padding:4px 10px;font-size:11px;}
  .btn-ghost{background:transparent;border-color:transparent;}
  .btn-ghost:hover{background:var(--surface2);border-color:var(--border2);color:var(--text);}
  .btn-danger{background:var(--red);border-color:var(--red);color:#fff;}

  .stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
  .stat-card{background:var(--surface);border:1px solid var(--border);padding:16px;position:relative;overflow:hidden;}
  .stat-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;}
  .stat-card.orange::before{background:var(--accent);}
  .stat-card.green::before{background:var(--green);}
  .stat-card.yellow::before{background:var(--yellow);}
  .stat-card.red::before{background:var(--red);}
  .stat-card.blue::before{background:#4a9eff;}
  .stat-label{font-size:10px;color:var(--text2);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px;}
  .stat-value{font-family:var(--mono);font-size:28px;font-weight:600;color:var(--text);line-height:1;}
  .stat-sub{font-size:10px;color:var(--text2);margin-top:6px;}

  .panel{background:var(--surface);border:1px solid var(--border);}
  .panel-header{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;}
  .panel-title{font-family:var(--mono);font-size:12px;color:var(--text);letter-spacing:.5px;}

  .table{width:100%;border-collapse:collapse;font-size:12px;}
  .table th{text-align:left;padding:8px 14px;font-family:var(--mono);font-size:10px;color:var(--text2);letter-spacing:1px;text-transform:uppercase;border-bottom:1px solid var(--border);font-weight:400;background:var(--surface2);}
  .table td{padding:11px 14px;border-bottom:1px solid var(--border);color:var(--text);vertical-align:middle;}
  .table tr:last-child td{border-bottom:none;}
  .table tr:hover td{background:var(--surface2);}

  .badge{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;font-size:10px;font-family:var(--mono);border-radius:2px;font-weight:500;}
  .badge-green{background:rgba(46,186,122,.12);color:var(--green);border:1px solid rgba(46,186,122,.2);}
  .badge-yellow{background:rgba(245,166,35,.12);color:var(--yellow);border:1px solid rgba(245,166,35,.2);}
  .badge-red{background:rgba(224,58,58,.12);color:var(--red);border:1px solid rgba(224,58,58,.2);}
  .badge-blue{background:rgba(74,158,255,.12);color:#4a9eff;border:1px solid rgba(74,158,255,.2);}
  .badge-orange{background:rgba(224,92,42,.12);color:var(--accent2);border:1px solid rgba(224,92,42,.2);}
  .badge::before{content:'●';font-size:6px;}

  .mono{font-family:var(--mono);font-size:11px;color:var(--text2);}
  .ip-text{font-family:var(--mono);font-size:11px;background:var(--surface2);padding:2px 6px;color:var(--accent2);border:1px solid var(--border2);}
  .grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}

  .form-group{margin-bottom:14px;}
  .form-label{font-size:11px;color:var(--text2);margin-bottom:6px;display:block;font-family:var(--mono);text-transform:uppercase;letter-spacing:.5px;}
  .form-control{width:100%;background:var(--surface2);border:1px solid var(--border2);color:var(--text);padding:8px 12px;font-size:12px;font-family:var(--sans);outline:none;transition:border-color .15s;border-radius:3px;}
  .form-control:focus{border-color:var(--accent);}
  .form-control::placeholder{color:var(--text3);}
  select.form-control{cursor:pointer;}

  .alert{padding:10px 14px;font-size:12px;border-left:3px solid;margin-bottom:0;display:flex;align-items:center;gap:8px;}
  .alert-yellow{background:rgba(245,166,35,.08);border-color:var(--yellow);color:var(--yellow);}
  .alert-green{background:rgba(46,186,122,.08);border-color:var(--green);color:var(--green);}
  .alert-red{background:rgba(224,58,58,.08);border-color:var(--red);color:var(--red);}

  .modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.8);z-index:100;align-items:center;justify-content:center;}
  .modal-overlay.open{display:flex;}
  .modal{background:var(--surface);border:1px solid var(--border2);width:400px;max-width:95vw;}
  .modal-wide{width:500px;}
  .modal-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;}
  .modal-title{font-family:var(--mono);font-size:13px;color:var(--text);}
  .modal-body{padding:20px;}
  .modal-footer{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px;}

  /* 로그인 화면 */
  .login-screen{position:fixed;inset:0;background:var(--bg);z-index:200;display:flex;align-items:center;justify-content:center;}
  .login-box{background:var(--surface);border:1px solid var(--border2);padding:40px;width:380px;max-width:95vw;}
  .login-logo{text-align:center;margin-bottom:32px;}
  .login-logo-icon{width:56px;height:56px;background:var(--accent);display:inline-flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:12px;}
  .login-logo-text{font-family:var(--mono);font-size:18px;font-weight:600;color:var(--text);}
  .login-logo-sub{font-size:11px;color:var(--text2);letter-spacing:1px;text-transform:uppercase;}
  .login-error{background:rgba(224,58,58,.08);border:1px solid rgba(224,58,58,.2);color:var(--red);padding:10px 14px;font-size:12px;border-radius:3px;margin-bottom:16px;display:none;}
  .login-server{font-family:var(--mono);font-size:11px;color:var(--text2);text-align:center;margin-top:16px;}

  ::-webkit-scrollbar{width:4px;}
  ::-webkit-scrollbar-track{background:transparent;}
  ::-webkit-scrollbar-thumb{background:var(--border2);border-radius:2px;}
  @keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}
  .live-dot{width:6px;height:6px;background:var(--green);border-radius:50%;animation:pulse 2s infinite;display:inline-block;margin-right:4px;}
  .api-config{background:var(--surface2);border:1px solid var(--border2);padding:14px 18px;display:flex;align-items:center;gap:12px;}
  .api-status{width:8px;height:8px;border-radius:50%;background:var(--red);flex-shrink:0;}
  .api-status.connected{background:var(--green);animation:pulse 2s infinite;}

  @keyframes spin{to{transform:rotate(360deg);}}
  .loading{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite;}

  .dashboard-grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
  @media(max-width:700px){.dashboard-grid2{grid-template-columns:1fr;}}

  /* ===== 반응형 ===== */
  .menu-toggle{display:none;align-items:center;justify-content:center;width:36px;height:36px;background:transparent;border:1px solid var(--border2);color:var(--text);cursor:pointer;border-radius:3px;flex-shrink:0;}
  .menu-toggle:hover{border-color:var(--accent);color:var(--accent);}
  .sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:49;}
  .sidebar-overlay.open{display:block;}

  @media(max-width:1100px){
    .stats-row{grid-template-columns:repeat(2,1fr)!important;}
  }

  @media(max-width:900px){
    .grid2{grid-template-columns:1fr;}
    .topbar{padding:0 14px;}
    .tab-page{padding:14px;}
    .table th,.table td{padding:8px 10px;}
  }

  @media(max-width:700px){
    /* 사이드바 오버레이 방식 */
    .shell{position:relative;}
    .sidebar{
      position:fixed;left:0;top:0;bottom:0;z-index:50;
      transform:translateX(-100%);transition:transform .25s ease;
      width:240px;
    }
    .sidebar.open{transform:translateX(0);}
    .main{width:100%;}

    /* 햄버거 버튼 표시 */
    .menu-toggle{display:flex;}

    /* topbar */
    .topbar{padding:0 12px;gap:10px;}
    .topbar-path{display:none;}
    .topbar-actions .btn:not(.btn-primary){display:none;}
    .topbar-actions{gap:6px;}

    /* 통계 카드 2열 */
    .stats-row{grid-template-columns:repeat(2,1fr)!important;}
    .stat-value{font-size:22px;}

    /* 대시보드 2단 그리드 → 1단 */
    #tab-dashboard > div[style*="grid-template-columns:1fr 1fr"]{
      grid-template-columns:1fr!important;
    }

    /* 탭 페이지 여백 */
    .tab-page{padding:12px;}

    /* 테이블 — 가로 스크롤 */
    .panel{overflow-x:auto;}
    .table{min-width:560px;}

    /* 모달 */
    .modal,.modal-wide{width:95vw!important;max-width:95vw;}
    .modal-body{padding:14px;}
    .modal-footer{padding:10px 14px;flex-wrap:wrap;gap:6px;}
    .grid2{grid-template-columns:1fr!important;}

    /* 로그인 */
    .login-box{padding:28px 20px;width:95vw;}
  }

  @media(max-width:480px){
    .stats-row{grid-template-columns:1fr 1fr!important;}
    .stat-value{font-size:20px;}
    .topbar-title{font-size:11px;}
    .btn{padding:6px 10px;font-size:11px;}
  }