* { margin: 0; padding: 0; box-sizing: border-box; }
    
    /* ELEGANT HONDA THEME - Modern, Clean, Professional */
    body {
      background: #F1F5F9;
      font-family: 'Inter', 'Plus Jakarta Sans', sans-serif;
      min-height: 100vh;
    }
    
    .app-wrapper {
      min-height: 100vh;
      width: 100%;
      display: flex;
      background: #F1F5F9;
    }
    
    /* SIDEBAR - Dark Elegant */
    .nav-sidebar {
      width: 280px;
      min-width: 280px;
      background: linear-gradient(180deg, #0A0C10 0%, #11151C 100%);
      border-right: 1px solid rgba(229, 231, 235, 0.08);
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      position: sticky;
      top: 0;
      height: 100vh;
      overflow-y: auto;
    }
    
    .nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 20px;
      margin: 4px 16px;
      border-radius: 12px;
      cursor: pointer;
      transition: all 0.25s ease;
      color: #9CA3AF;
      font-size: 14px;
      font-weight: 500;
      position: relative;
    }
    
    .nav-item:hover {
      background: rgba(225, 29, 46, 0.12);
      color: #FFFFFF;
    }
    
    .nav-item.active {
      background: linear-gradient(135deg, rgba(225, 29, 46, 0.15), rgba(225, 29, 46, 0.08));
      color: #E11D2E;
    }
    
    .nav-item.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 50%;
      background: #E11D2E;
      border-radius: 4px;
    }
    
    /* MAIN AREA */
    .main-area {
      flex: 1;
      overflow-y: auto;
      overflow-x: hidden;
      padding: 28px 32px;
      background: #F1F5F9;
      min-height: 100vh;
    }
    
    /* CARDS - Clean White with Subtle Shadow */
    .card, .card-light {
      background: #FFFFFF;
      border-radius: 24px;
      padding: 24px;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.03);
      transition: all 0.25s ease;
      border: 1px solid rgba(0, 0, 0, 0.04);
    }
    
    .card-light {
      padding: 20px;
    }
    
    .card:hover {
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
      transform: translateY(-2px);
    }
    
    /* PROGRESS */
    .progress-track {
      background: #E5E7EB;
      border-radius: 100px;
      height: 8px;
      overflow: hidden;
    }
    
    .progress-fill {
      height: 100%;
      border-radius: 100px;
      background: linear-gradient(90deg, #E11D2E, #DC2626);
    }
    
    /* BUTTONS */
    .btn-primary {
      background: linear-gradient(135deg, #E11D2E 0%, #DC2626 100%);
      border: none;
      color: white;
      padding: 12px 24px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 13px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      box-shadow: 0 2px 8px rgba(225, 29, 46, 0.25);
      transition: all 0.2s ease;
    }
    
    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(225, 29, 46, 0.35);
      background: linear-gradient(135deg, #E33746, #DC2626);
    }
    
    .btn-secondary {
      background: #F3F4F6;
      border: 1px solid #E5E7EB;
      color: #374151;
      padding: 12px 24px;
      border-radius: 40px;
      font-weight: 500;
      font-size: 13px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: all 0.2s;
    }
    
    .btn-secondary:hover {
      background: #E5E7EB;
    }
    
    /* SEARCH INPUT */
    .search-input {
      background: #FFFFFF;
      border: 1px solid #E5E7EB;
      border-radius: 60px;
      padding: 14px 20px 14px 48px;
      color: #111827;
      font-size: 14px;
      width: 100%;
      transition: all 0.2s;
    }
    
    .search-input:focus {
      border-color: #E11D2E;
      box-shadow: 0 0 0 3px rgba(225, 29, 46, 0.1);
      outline: none;
    }
    
    /* BADGES */
    .badge-segment {
      background: #FEE2E2;
      color: #E11D2E;
      padding: 6px 14px;
      border-radius: 40px;
      font-size: 11px;
      font-weight: 700;
    }
    
    .badge-dealer {
      background: #D1FAE5;
      color: #059669;
      padding: 6px 14px;
      border-radius: 40px;
      font-size: 11px;
      font-weight: 600;
    }
    
    /* RFM Tier Cards */
    .rfm-tier-card {
      background: #F9FAFB;
      border-radius: 20px;
      padding: 16px;
      transition: all 0.2s;
      border: 1px solid #F3F4F6;
    }
    
    .rfm-tier-card:hover {
      background: #FFFFFF;
      border-color: #E5E7EB;
    }
    
    .tier-badge-svg-container {
      display: inline-block;
      width: 65px;
      height: auto;
    }
    
    .rfm-label-desc {
      font-size: 11px;
      color: #6B7280;
      margin-top: 4px;
      font-weight: 500;
    }
    
    /* PAGE TRANSITIONS */
    .page-container {
      display: none;
      animation: fadeInUp 0.35s ease;
    }
    
    .active-page {
      display: block;
    }
    
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(12px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    
    /* MOBILE */
    .mobile-toggle {
      display: none;
      position: fixed;
      top: 18px;
      left: 18px;
      z-index: 60;
      background: #11151C;
      padding: 10px;
      border-radius: 12px;
      color: white;
    }
    
    @media (max-width: 768px) {
      .app-wrapper {
        flex-direction: column;
      }
      .nav-sidebar {
        position: fixed;
        left: -300px;
        z-index: 55;
        transition: left 0.3s ease;
        width: 280px;
        height: 100vh;
      }
      .nav-sidebar.open {
        left: 0;
      }
      .mobile-toggle {
        display: flex;
      }
      .main-area {
        padding: 20px 16px;
        padding-top: 80px;
      }
    }
    
    /* SCROLLBAR */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: #E5E7EB;
      border-radius: 8px;
    }
    ::-webkit-scrollbar-thumb {
      background: #E11D2E;
      border-radius: 8px;
    }
    
    /* TYPOGRAPHY */
    h1, h2, h3, h4 {
      font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    }
    
    .text-gradient {
      background: linear-gradient(135deg, #E11D2E, #DC2626);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }