* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: white;
    overflow-x: hidden;
  }
  
  /* Loading Modal */
  .loading-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
  }
  
  .loading-content {
    text-align: center;
    color: white;
  }
  
  .loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #ff8c00;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  .container {
    display: flex;
    height: 100vh;
  }
  
  /* Sidebar */
  .sidebar {
    width: 250px;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    padding: 20px 0;
    border-right: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 20px;
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: bold;
    color: #ff8c00;
  }
  
  .logo i {
    font-size: 28px;
  }
  
  .nav-menu {
    display: flex;
    flex-direction: column;
  }
  
  .nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
  }
  
  .nav-item:hover {
    background: rgba(255, 140, 0, 0.1);
    border-left-color: #ff8c00;
  }
  
  .nav-item.active {
    background: rgba(255, 140, 0, 0.2);
    border-left-color: #ff8c00;
    color: #ff8c00;
  }
  
  .nav-item i {
    font-size: 18px;
    width: 20px;
  }
  
  .nav-item span {
    font-size: 14px;
  }
  
  .dropdown-icon {
    margin-left: auto;
    font-size: 12px;
  }
  
  .sub-item {
    padding-left: 40px;
    font-size: 13px;
  }
  
  /* Main Content */
  .main-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  }
  
  .top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 0 10px;
  }
  
  .header-left span {
    font-size: 14px;
    color: #ccc;
  }
  
  .header-right {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 15px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
  }
  
  .user-info i {
    font-size: 20px;
    color: #ff8c00;
  }
  
  /* Dashboard Content */
  .dashboard-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  
  .cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
  }
  
  .card {
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.9), rgba(255, 165, 0, 0.7));
    border-radius: 15px;
    padding: 25px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
  }
  
  .card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), transparent);
    border-radius: 50%;
    transform: translate(30px, -30px);
  }
  
  .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
  }
  
  .card-header span {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
  }
  
  .card-icon {
    font-size: 24px;
    color: rgba(255, 255, 255, 0.8);
  }
  
  .card-value {
    font-size: 28px;
    font-weight: bold;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  }
  
  /* Specific card colors */
  .total-withdraw {
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.9), rgba(255, 165, 0, 0.7));
  }
  
  .total-deposit {
    background: linear-gradient(135deg, rgba(255, 140, 0, 0.9), rgba(255, 165, 0, 0.7));
  }
  
  .current-invest {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(40, 40, 40, 0.6));
  }
  
  .current-plan {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(40, 40, 40, 0.6));
  }
  
  .pending-invest {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(40, 40, 40, 0.6));
  }
  
  .pending-withdraw {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(40, 40, 40, 0.6));
  }
  
  .referral-earn {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(40, 40, 40, 0.6));
  }
  
  /* Referral Section */
  .referral-section {
    background: rgba(0, 0, 0, 0.5);
    border-radius: 15px;
    padding: 25px;
    margin-top: 20px;
    backdrop-filter: blur(10px);
  }
  
  .referral-header {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 15px;
    color: #ff8c00;
  }
  
  .referral-content {
    display: flex;
    gap: 20px;
    align-items: center;
  }
  
  .referral-link {
    background: rgba(255, 140, 0, 0.2);
    padding: 12px 20px;
    border-radius: 8px;
    border: 1px solid rgba(255, 140, 0, 0.3);
    color: #ff8c00;
    font-family: monospace;
    font-size: 14px;
    cursor: pointer;
  }
  
  .referral-tree {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s ease;
  }
  
  .referral-tree:hover {
    background: rgba(255, 255, 255, 0.2);
  }
  
  /* Responsive */
  @media (max-width: 768px) {
    .container {
      flex-direction: column;
    }
    
    .sidebar {
      width: 100%;
      height: auto;
      padding: 10px 0;
    }
    
    .nav-menu {
      flex-direction: row;
      overflow-x: auto;
      gap: 10px;
      padding: 0 10px;
    }
    
    .nav-item {
      flex-shrink: 0;
      padding: 10px 15px;
      border-left: none;
      border-bottom: 3px solid transparent;
    }
    
    .nav-item:hover,
    .nav-item.active {
      border-left: none;
      border-bottom-color: #ff8c00;
    }
    
    .cards-row {
      grid-template-columns: 1fr;
    }
    
    .main-content {
      padding: 15px;
    }
  }
  
  /* Hide loading modal by default */
  .loading-modal.hidden {
    display: none;
  }