:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --surface-muted: #eef2f7;
  
    --text: #172033;
    --text-soft: #64748b;
    --text-light: #94a3b8;
  
    --border: #dbe3ee;
    --border-strong: #cbd5e1;
  
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-soft: #dbeafe;
  
    --success: #16a34a;
    --success-soft: #dcfce7;
  
    --danger: #dc2626;
    --danger-soft: #fee2e2;
  
    --warning: #d97706;
    --warning-soft: #fef3c7;
  
    --purple: #7c3aed;
    --purple-soft: #ede9fe;
  
    --sidebar-width: 250px;
    --topbar-height: 86px;
  
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
  
    --shadow-sm:
      0 1px 2px rgba(15, 23, 42, 0.04),
      0 1px 3px rgba(15, 23, 42, 0.08);
  
    --shadow-md:
      0 10px 30px rgba(15, 23, 42, 0.08);
  
    --shadow-lg:
      0 20px 60px rgba(15, 23, 42, 0.14);
  
    --transition: 180ms ease;
  }
  
  * {
    box-sizing: border-box;
  }
  
  html {
    min-height: 100%;
  }
  
  body {
    min-height: 100vh;
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family:
      Inter,
      ui-sans-serif,
      system-ui,
      -apple-system,
      BlinkMacSystemFont,
      "Segoe UI",
      sans-serif;
    font-size: 14px;
    line-height: 1.5;
  }
  
  button,
  input,
  textarea,
  select {
    font: inherit;
  }
  
  button {
    cursor: pointer;
  }
  
  a {
    color: inherit;
    text-decoration: none;
  }
  
  h1,
  h2,
  h3,
  h4,
  p {
    margin-top: 0;
  }
  
  .hidden {
    display: none !important;
  }
  
  .muted {
    color: var(--text-soft);
  }
  
  .text-success {
    color: var(--success);
  }
  
  .text-danger {
    color: var(--danger);
  }
  
  .text-warning {
    color: var(--warning);
  }
  
  .eyebrow {
    display: block;
    margin-bottom: 4px;
    color: var(--text-light);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }
  
  .page-loading {
    display: grid;
    min-height: 320px;
    place-items: center;
    color: var(--text-soft);
    font-weight: 700;
  }
  
  .empty-state {
    display: grid;
    min-height: 420px;
    padding: 40px;
    place-items: center;
    align-content: center;
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-xl);
    background: var(--surface);
    text-align: center;
  }
  
  .empty-state-icon {
    display: grid;
    width: 72px;
    height: 72px;
    margin-bottom: 18px;
    place-items: center;
    border-radius: 22px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 24px;
    font-weight: 900;
  }
  
  .empty-state h3 {
    margin-bottom: 8px;
    font-size: 22px;
  }
  
  .empty-state p {
    max-width: 440px;
    margin-bottom: 0;
    color: var(--text-soft);
  }
  
  .toast {
    position: fixed;
    top: 22px;
    right: 22px;
    z-index: 2000;
    max-width: 420px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    background: var(--text);
    color: white;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition:
      opacity var(--transition),
      transform var(--transition);
  }
  
  .toast.show {
    opacity: 1;
    transform: translateY(0);
  }
  
  .toast.success {
    background: var(--success);
  }
  
  .toast.error {
    background: var(--danger);
  }
  
  .toast.info {
    background: var(--primary);
  }
  
  .card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
  }
  
  .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 22px;
    border-bottom: 1px solid var(--border);
  }
  
  .card-header h3 {
    margin: 0;
    font-size: 17px;
  }
  
  .card-body {
    padding: 22px;
  }
  
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 26px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--surface-muted);
    color: var(--text-soft);
    font-size: 12px;
    font-weight: 800;
  }
  
  .badge.success {
    background: var(--success-soft);
    color: var(--success);
  }
  
  .badge.danger {
    background: var(--danger-soft);
    color: var(--danger);
  }
  
  .badge.warning {
    background: var(--warning-soft);
    color: var(--warning);
  }
  
  .badge.primary {
    background: var(--primary-soft);
    color: var(--primary);
  }
  
  .badge.purple {
    background: var(--purple-soft);
    color: var(--purple);
  }
  
  .toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 18px;
  }
  
  .toolbar-left,
  .toolbar-right {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
  }
  
  .section-title {
    margin-bottom: 16px;
  }
  
  .section-title h3 {
    margin-bottom: 4px;
  }
  
  .section-title p {
    margin-bottom: 0;
    color: var(--text-soft);
  }