*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --bg-0: #0a0c10;
    --bg-1: #12151c;
    --bg-2: #1a1e28;
    --bg-3: #232836;
    --border: #2a3040;
    --border-hover: #3a4560;
    --text-0: #e8ecf4;
    --text-1: #a0aac0;
    --text-2: #6a7590;
    --accent: #4a9eff;
    --accent-dim: #2a5a9a;
    --accent-glow: rgba(74, 158, 255, 0.15);
    --green: #34d399;
    --green-dim: rgba(52, 211, 153, 0.15);
    --red: #f87171;
    --red-dim: rgba(248, 113, 113, 0.15);
    --yellow: #fbbf24;
    --yellow-dim: rgba(251, 191, 36, 0.15);
    --radius: 8px;
    --font-sans: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
  }

  body {
    font-family: var(--font-sans);
    background: var(--bg-0);
    color: var(--text-0);
    line-height: 1.5;
    min-height: 100vh;
  }

  /* Login page */
  .login-wrapper {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh;
    background:
      radial-gradient(ellipse at 30% 20%, rgba(74, 158, 255, 0.04) 0%, transparent 60%),
      radial-gradient(ellipse at 70% 80%, rgba(52, 211, 153, 0.03) 0%, transparent 60%);
  }
  .login-card {
    width: 100%; max-width: 400px; padding: 40px;
    background: var(--bg-1); border: 1px solid var(--border);
    border-radius: 12px;
  }
  .login-logo {
    font-family: var(--font-mono); font-size: 28px; font-weight: 600;
    letter-spacing: -1px; margin-bottom: 4px;
  }
  .login-logo span { color: var(--accent); }
  .login-sub { color: var(--text-2); font-size: 13px; margin-bottom: 32px; }
  .login-tabs { display: flex; gap: 0; margin-bottom: 24px; border-bottom: 1px solid var(--border); }
  .login-tab {
    background: none; border: none; color: var(--text-2);
    font-family: var(--font-sans); font-size: 14px; font-weight: 500;
    padding: 8px 16px; cursor: pointer;
    border-bottom: 2px solid transparent; transition: all 0.15s;
  }
  .login-tab:hover { color: var(--text-1); }
  .login-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

  /* Forms */
  .form-group { margin-bottom: 16px; }
  .form-label {
    display: block; font-size: 12px; font-weight: 500;
    color: var(--text-1); margin-bottom: 6px;
  }
  .form-input {
    width: 100%; padding: 10px 12px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: var(--radius); color: var(--text-0);
    font-family: var(--font-sans); font-size: 14px;
    transition: border-color 0.15s;
    outline: none;
  }
  .form-input:focus { border-color: var(--accent); }
  .form-input::placeholder { color: var(--text-2); }
  .form-hint { font-size: 11px; color: var(--text-2); margin-top: 4px; }

  .btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 20px; border-radius: var(--radius);
    font-family: var(--font-sans); font-size: 14px; font-weight: 500;
    border: none; cursor: pointer; transition: all 0.15s;
    text-decoration: none;
  }
  .btn-primary { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: #5aadff; }
  .btn-secondary { background: var(--bg-3); color: var(--text-0); border: 1px solid var(--border); }
  .btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-2); }
  .btn-danger { background: var(--red-dim); color: var(--red); border: 1px solid rgba(248,113,113,0.2); }
  .btn-danger:hover { background: rgba(248,113,113,0.25); }
  .btn-sm { padding: 6px 12px; font-size: 13px; }
  .btn-block { width: 100%; justify-content: center; }
  .btn-ghost { background: none; border: none; color: var(--text-1); padding: 6px 10px; }
  .btn-ghost:hover { color: var(--text-0); background: var(--bg-2); }

  /* App shell */
  .app-shell { display: flex; min-height: 100vh; }
  .sidebar {
    width: 240px; background: var(--bg-1);
    border-right: 1px solid var(--border);
    padding: 20px 0; flex-shrink: 0;
    display: flex; flex-direction: column;
  }
  .sidebar-logo {
    font-family: var(--font-mono); font-size: 20px; font-weight: 600;
    padding: 0 20px; margin-bottom: 8px; letter-spacing: -0.5px;
  }
  .sidebar-logo span { color: var(--accent); }
  .sidebar-version {
    font-family: var(--font-mono); font-size: 11px;
    color: var(--text-2); padding: 0 20px; margin-bottom: 24px;
  }
  .sidebar-section {
    font-size: 10px; font-weight: 600; text-transform: uppercase;
    letter-spacing: 1px; color: var(--text-2);
    padding: 0 20px; margin: 16px 0 8px;
  }
  .sidebar-nav { list-style: none; }
  .sidebar-nav li a {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 20px; color: var(--text-1);
    text-decoration: none; font-size: 14px;
    transition: all 0.1s; cursor: pointer;
  }
  .sidebar-nav li a:hover { color: var(--text-0); background: var(--bg-2); }
  .sidebar-nav li a.active { color: var(--accent); background: var(--accent-glow); }
  .sidebar-nav li a i { width: 18px; height: 18px; }
  .sidebar-spacer { flex: 1; }
  .sidebar-user {
    padding: 12px 20px; border-top: 1px solid var(--border);
    display: flex; align-items: center; gap: 10px;
    position: relative;
  }
  .sidebar-avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--bg-3); display: flex; align-items: center; justify-content: center;
  }
  .sidebar-username { font-size: 13px; font-weight: 500; }
  .sidebar-role { font-size: 11px; color: var(--text-2); }
  .sidebar-user-info { flex: 1; }
  .sidebar-menu-btn {
    background: none; border: none; color: var(--text-2);
    cursor: pointer; padding: 4px; border-radius: 4px; transition: all 0.15s;
    display: flex; align-items: center;
  }
  .sidebar-menu-btn:hover { color: var(--text-0); background: var(--bg-2); }
  .user-popover {
    display: none; position: absolute; bottom: 100%; left: 12px; right: 12px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 4px; margin-bottom: 8px;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
  }
  .user-popover.open { display: block; }
  .user-popover-item {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 12px; border-radius: 6px;
    font-size: 14px; color: var(--text-1);
    cursor: pointer; border: none; background: none; width: 100%;
    font-family: var(--font-sans); transition: all 0.1s;
  }
  .user-popover-item:hover { background: var(--bg-3); color: var(--text-0); }
  .user-popover-item.danger { color: var(--red); }
  .user-popover-item.danger:hover { background: var(--red-dim); }
  .user-popover-divider { height: 1px; background: var(--border); margin: 4px 0; }

  .main { flex: 1; padding: 28px 32px; overflow-y: auto; }
  .page-header { margin-bottom: 24px; }
  .page-title { font-size: 22px; font-weight: 600; margin-bottom: 4px; }
  .page-desc { font-size: 14px; color: var(--text-1); }
  .page-actions { display: flex; gap: 8px; margin-top: 12px; }

  /* Cards */
  .card {
    background: var(--bg-1); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
  }
  .card-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 16px;
  }
  .card-title { font-size: 14px; font-weight: 600; }

  /* Stats grid */
  .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
  .stat-card {
    background: var(--bg-1); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px;
  }
  .stat-label { font-size: 12px; color: var(--text-2); margin-bottom: 4px; display: flex; align-items: center; gap: 6px; }
  .stat-value { font-size: 24px; font-weight: 600; font-family: var(--font-mono); }
  .stat-value.green { color: var(--green); }

  /* Status badges */
  .badge {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 500;
  }
  .badge-green { background: var(--green-dim); color: var(--green); }
  .badge-red { background: var(--red-dim); color: var(--red); }
  .badge-yellow { background: var(--yellow-dim); color: var(--yellow); }
  .badge-dot { width: 6px; height: 6px; border-radius: 50%; }
  .badge-green .badge-dot { background: var(--green); }
  .badge-red .badge-dot { background: var(--red); }
  .badge-yellow .badge-dot { background: var(--yellow); }

  /* Table */
  .table-wrapper { overflow-x: auto; }
  table { width: 100%; border-collapse: collapse; }
  th {
    text-align: left; font-size: 11px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.5px;
    color: var(--text-2); padding: 10px 16px;
    border-bottom: 1px solid var(--border);
  }
  td {
    padding: 12px 16px; border-bottom: 1px solid var(--border);
    font-size: 14px;
  }
  tr:hover td { background: var(--bg-2); }
  .table-actions { display: flex; gap: 4px; }

  /* Account cards */
  .accounts-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
  .account-card {
    background: var(--bg-1); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
    transition: border-color 0.15s; cursor: pointer;
  }
  .account-card:hover { border-color: var(--border-hover); }
  .account-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
  .account-email { font-size: 15px; font-weight: 500; }
  .account-meta { display: flex; gap: 16px; margin-bottom: 12px; }
  .account-meta-item { font-size: 12px; color: var(--text-2); display: flex; align-items: center; gap: 5px; }
  .account-meta-item i { width: 14px; height: 14px; }
  .account-footer { display: flex; justify-content: space-between; align-items: center; padding-top: 12px; border-top: 1px solid var(--border); }
  .account-sync { font-size: 12px; color: var(--text-2); display: flex; align-items: center; gap: 5px; }

  /* Detail page */
  .detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
  .detail-section { margin-bottom: 24px; }
  .detail-section-title { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-2); margin-bottom: 12px; }
  .detail-row { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid var(--border); }
  .detail-key { font-size: 13px; color: var(--text-2); }
  .detail-val { font-size: 13px; font-family: var(--font-mono); color: var(--text-0); }
  .copy-btn {
    background: none; border: none; color: var(--text-2);
    cursor: pointer; padding: 2px; transition: color 0.15s;
  }
  .copy-btn:hover { color: var(--accent); }

  .conn-box {
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 16px;
    font-family: var(--font-mono); font-size: 13px;
  }
  .conn-box-title { font-family: var(--font-sans); font-size: 12px; font-weight: 600; color: var(--text-2); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
  .conn-row { display: flex; justify-content: space-between; align-items: center; padding: 4px 0; }
  .conn-key { color: var(--text-2); }
  .conn-val { color: var(--green); display: flex; align-items: center; gap: 8px; }

  /* Settings form */
  .settings-grid { display: grid; grid-template-columns: 280px 1fr; gap: 32px; }
  .settings-nav { list-style: none; }
  .settings-nav li a {
    display: block; padding: 8px 12px; font-size: 14px;
    color: var(--text-1); text-decoration: none;
    border-radius: 6px; margin-bottom: 2px;
  }
  .settings-nav li a:hover { background: var(--bg-2); }
  .settings-nav li a.active { color: var(--accent); background: var(--accent-glow); }
  .settings-panel { max-width: 560px; }
  .settings-section { margin-bottom: 32px; }
  .settings-section-title { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
  .settings-section-desc { font-size: 13px; color: var(--text-2); margin-bottom: 16px; }
  .settings-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 12px 0; border-bottom: 1px solid var(--border);
  }
  .settings-row-label div:first-child { font-size: 14px; font-weight: 500; }
  .settings-row-label div:last-child { font-size: 12px; color: var(--text-2); }

  /* Toggle switch */
  .toggle { position: relative; width: 40px; height: 22px; cursor: pointer; }
  .toggle input { display: none; }
  .toggle-track {
    position: absolute; inset: 0;
    background: var(--bg-3); border-radius: 11px;
    transition: background 0.2s;
  }
  .toggle input:checked + .toggle-track { background: var(--accent); }
  .toggle-thumb {
    position: absolute; top: 3px; left: 3px;
    width: 16px; height: 16px; border-radius: 50%;
    background: #fff; transition: transform 0.2s;
  }
  .toggle input:checked ~ .toggle-thumb { transform: translateX(18px); }

  /* Modal / Dialog */
  .modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
    z-index: 2000; align-items: center; justify-content: center;
  }
  .modal-overlay.open { display: flex; }
  .modal {
    background: var(--bg-1); border: 1px solid var(--border);
    border-radius: 12px; padding: 24px;
    width: 100%; max-width: 440px;
    animation: modalIn 0.15s ease-out;
  }
  @keyframes modalIn { from { opacity: 0; transform: scale(0.96) translateY(8px); } }
  .modal-title { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
  .modal-desc { font-size: 14px; color: var(--text-1); margin-bottom: 20px; }
  .modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

  /* Select */
  .form-select {
    width: 100%; padding: 10px 12px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: var(--radius); color: var(--text-0);
    font-family: var(--font-sans); font-size: 14px; outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236a7590' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
  }
  .form-select:focus { border-color: var(--accent); }

  /* Inline number input */
  .inline-input {
    width: 80px; padding: 6px 10px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: 6px; color: var(--text-0);
    font-family: var(--font-mono); font-size: 13px;
    text-align: center; outline: none;
  }
  .inline-input:focus { border-color: var(--accent); }

  /* Toast notifications */
  .toast-container { position: fixed; top: 16px; right: 16px; z-index: 3000; display: flex; flex-direction: column; gap: 8px; }
  .toast { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-radius: var(--radius); font-size: 14px; background: var(--bg-2); border: 1px solid var(--border); transform: translateX(100%); opacity: 0; transition: all 0.3s ease; }
  .toast.show { transform: translateX(0); opacity: 1; }
  .toast-success { border-color: var(--green); }
  .toast-error { border-color: var(--red); }

  /* Error message */
  .form-error {
    background: var(--red-dim); border: 1px solid rgba(248,113,113,0.3);
    border-radius: var(--radius); padding: 10px 14px;
    font-size: 13px; color: var(--red); margin-bottom: 16px;
  }