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

  :root {
    --accent:          #6c5ce7;
    --accent-hover:    #5a4bd6;
    --accent-light:    rgba(108,92,231,.10);
    --accent-lighter:  rgba(108,92,231,.06);
    --sidebar-bg:      #0f1117;
    --sidebar-width:   230px;
    --content-bg:      #f4f5fb;
    --card-bg:         #ffffff;
    --text-primary:    #1a1d2e;
    --text-secondary:  #6b7280;
    --text-muted:      #9ca3af;
    --border:          #e5e7eb;
    --shadow-sm:       0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
    --shadow-md:       0 4px 16px rgba(0,0,0,.09);
    --radius:          10px;
    --radius-lg:       16px;
    --danger:          #ef4444;
    --danger-bg:       #fef2f2;
    --success:         #10b981;
    --success-bg:      #ecfdf5;
    --warning:         #f59e0b;
    --warning-bg:      #fffbeb;
    --info:            #3b82f6;
    --info-bg:         #eff6ff;
  }

  body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--content-bg);
    color: var(--text-primary);
    font-size: 14px;
    min-height: 100vh;
  }

  /* ── LOGIN SCREEN ────────────────────────────────────────── */
  #login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f1117 0%, #1a1d2e 100%);
  }
  .login-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,.35);
  }
  .login-logo {
    text-align: center;
    margin-bottom: 28px;
  }
  .login-logo .badge {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    padding: 3px 9px;
    border-radius: 5px;
    margin-bottom: 10px;
  }
  .login-logo h1 {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
  }
  .login-logo p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
  }
  .login-field {
    margin-bottom: 16px;
  }
  .login-field label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: .04em;
  }
  .login-field input {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
    background: #f9fafb;
    outline: none;
    transition: border-color .15s;
  }
  .login-field input:focus { border-color: var(--accent); background: #fff; }
  .login-btn {
    width: 100%;
    padding: 11px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background .15s;
    margin-top: 4px;
  }
  .login-btn:hover { background: var(--accent-hover); }
  .login-error {
    color: var(--danger);
    font-size: 13px;
    margin-top: 10px;
    text-align: center;
    display: none;
  }

  /* ── MAIN LAYOUT ─────────────────────────────────────────── */
  #app { display: none; }

  /* ── SIDEBAR ─────────────────────────────────────────────── */
  #sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: #fff;
    display: flex;
    flex-direction: column;
    z-index: 200;
    transition: transform .25s ease;
  }
  .sidebar-logo {
    padding: 22px 20px 18px;
    border-bottom: 1px solid rgba(255,255,255,.07);
  }
  .sidebar-logo .badge {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    padding: 2px 7px;
    border-radius: 4px;
    margin-bottom: 7px;
  }
  .sidebar-logo h1 {
    font-size: 16px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
  }
  .sidebar-logo small {
    font-size: 11px;
    color: rgba(255,255,255,.4);
    font-weight: 400;
  }
  .sidebar-nav {
    padding: 16px 12px;
    flex: 1;
  }
  .nav-label {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.3);
    padding: 0 8px;
    margin: 16px 0 6px;
  }
  .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 8px;
    cursor: pointer;
    color: rgba(255,255,255,.6);
    font-size: 13px;
    font-weight: 500;
    transition: all .15s;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
  }
  .nav-item svg { flex-shrink: 0; opacity: .7; }
  .nav-item:hover { background: rgba(255,255,255,.06); color: #fff; }
  .nav-item.active { background: var(--accent-light); color: var(--accent); }
  .nav-item.active svg { opacity: 1; }
  .sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,.07);
    font-size: 11px;
    color: rgba(255,255,255,.3);
  }

  /* ── MOBILE TOPBAR ───────────────────────────────────────── */
  #topbar {
    display: none;
    position: sticky;
    top: 0;
    background: var(--sidebar-bg);
    color: #fff;
    padding: 14px 16px;
    align-items: center;
    justify-content: space-between;
    z-index: 150;
  }
  #topbar h2 { font-size: 15px; font-weight: 700; }
  #menu-btn {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 4px;
  }
  #sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 190;
  }

  /* ── MAIN CONTENT ────────────────────────────────────────── */
  #main {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 28px 28px 48px;
  }
  .page { display: none; }
  .page.active { display: block; }
  .page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
  }
  .page-header h2 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
  }
  .page-header p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
  }

  /* ── CARDS ───────────────────────────────────────────────── */
  .card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
  }
  .card-body { padding: 20px 24px; }
  .card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .card-header h3 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
  }

  /* ── STAT CARDS ──────────────────────────────────────────── */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
  }
  .stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 20px 20px 18px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
  }
  .stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--accent);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
  .stat-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-muted);
    margin-bottom: 8px;
  }
  .stat-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
  }
  .stat-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
  }
  .stat-icon {
    position: absolute;
    top: 16px; right: 16px;
    width: 36px; height: 36px;
    background: var(--accent-lighter);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
  }

  /* ── TABLE ───────────────────────────────────────────────── */
  .table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
  }
  thead th {
    padding: 10px 14px;
    text-align: left;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--text-muted);
    background: #f9fafb;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
  }
  tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background .1s;
  }
  tbody tr:last-child { border-bottom: none; }
  tbody tr:hover { background: #fafbff; }
  tbody td {
    padding: 11px 14px;
    color: var(--text-primary);
    vertical-align: middle;
  }
  .store-name { font-weight: 700; }
  .store-slug { font-size: 11px; color: var(--text-muted); }

  /* ── BADGES ──────────────────────────────────────────────── */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
  }
  .badge-active    { background: var(--success-bg); color: var(--success); }
  .badge-trial     { background: var(--info-bg); color: var(--info); }
  .badge-delinquent{ background: var(--warning-bg); color: var(--warning); }
  .badge-cancelled { background: #f3f4f6; color: var(--text-muted); }
  .badge-starter   { background: var(--accent-light); color: var(--accent); }
  .badge-growth    { background: #fdf4ff; color: #a855f7; }

  /* ── BUTTONS ─────────────────────────────────────────────── */
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .15s;
    text-decoration: none;
    white-space: nowrap;
  }
  .btn-primary   { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: var(--accent-hover); }
  .btn-ghost     { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); }
  .btn-ghost:hover { background: var(--accent-light); }
  .btn-danger    { background: transparent; color: var(--danger); border: 1.5px solid #fca5a5; }
  .btn-danger:hover { background: var(--danger-bg); }
  .btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
  .btn-icon {
    width: 30px; height: 30px;
    padding: 0;
    background: #f3f4f6;
    color: var(--text-secondary);
    border-radius: 6px;
  }
  .btn-icon:hover { background: var(--accent-light); color: var(--accent); }

  /* ── FORM GRID ───────────────────────────────────────────── */
  .form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
  }
  .form-group { display: flex; flex-direction: column; gap: 5px; }
  .form-group.full { grid-column: 1 / -1; }
  .form-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .04em;
  }
  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 9px 12px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 13px;
    color: var(--text-primary);
    background: #f9fafb;
    outline: none;
    transition: border-color .15s;
  }
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus { border-color: var(--accent); background: #fff; }
  .form-group textarea { resize: vertical; min-height: 80px; }
  .form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
  }

  /* ── ALERTS LIST ─────────────────────────────────────────── */
  .alert-list { display: flex; flex-direction: column; gap: 10px; }
  .alert-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
  }
  .alert-item.warn { border-left: 3px solid var(--warning); }
  .alert-item.danger { border-left: 3px solid var(--danger); }
  .alert-item.info { border-left: 3px solid var(--info); }
  .alert-icon {
    width: 32px; height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
  }
  .alert-icon.warn  { background: var(--warning-bg); }
  .alert-icon.danger{ background: var(--danger-bg); }
  .alert-icon.info  { background: var(--info-bg); }
  .alert-content { flex: 1; min-width: 0; }
  .alert-title { font-weight: 700; font-size: 13px; }
  .alert-desc  { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
  .no-alerts {
    text-align: center;
    padding: 32px;
    color: var(--text-muted);
    font-size: 13px;
  }

  /* ── CHART PLACEHOLDER ───────────────────────────────────── */
  .chart-placeholder {
    height: 220px;
    background: linear-gradient(135deg, var(--accent-lighter) 0%, rgba(108,92,231,.03) 100%);
    border-radius: var(--radius);
    border: 1.5px dashed rgba(108,92,231,.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    gap: 8px;
  }
  .chart-placeholder svg { opacity: .5; }
  .chart-placeholder span { font-size: 13px; font-weight: 600; opacity: .6; }
  .chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 90px;
    padding: 0 16px;
    margin-bottom: 8px;
  }
  .chart-bar {
    flex: 1;
    background: var(--accent);
    border-radius: 4px 4px 0 0;
    opacity: .2;
    min-width: 20px;
    transition: opacity .2s;
    position: relative;
  }
  .chart-bar:hover { opacity: .5; }
  .chart-bar[data-val]::after {
    content: attr(data-month);
    position: absolute;
    bottom: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: var(--text-muted);
    white-space: nowrap;
  }

  /* ── TOAST ───────────────────────────────────────────────── */
  #toast {
    position: fixed;
    bottom: 24px; right: 24px;
    background: #1a1d2e;
    color: #fff;
    padding: 12px 18px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 500;
    box-shadow: 0 8px 30px rgba(0,0,0,.2);
    z-index: 9999;
    transform: translateY(20px);
    opacity: 0;
    transition: all .25s ease;
    pointer-events: none;
  }
  #toast.show { transform: translateY(0); opacity: 1; }

  /* ── LOADING ─────────────────────────────────────────────── */
  .loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-muted);
    font-size: 13px;
    gap: 10px;
  }
  .spinner {
    width: 18px; height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .7s linear infinite;
  }
  @keyframes spin { to { transform: rotate(360deg); } }

  /* ── TWO-COL LAYOUT ──────────────────────────────────────── */
  .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }

  /* ── RESPONSIVE ──────────────────────────────────────────── */
  @media (max-width: 900px) {
    #sidebar { transform: translateX(-100%); }
    #sidebar.open { transform: translateX(0); }
    #sidebar-overlay.open { display: block; }
    #topbar { display: flex; }
    #main { margin-left: 0; padding: 20px 16px 48px; }
    .two-col { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 500px) {
    .stats-grid { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: flex-start; }
  }