:root {
      --primary: #0000ff;
      --primary-dark: #0000cc;
    }
    body { font-family: 'Inter', system-ui, -apple-system, sans-serif; background-color: #f4f6fb; }
    .btn-primary { background-color: #0000ff; color: #ffffff; transition: all 0.2s; }
    .btn-primary:hover { background-color: #0000cc; }
    .tab-active { border-bottom: 3px solid #0000ff; color: #0000ff; font-weight: 700; }