/* Custom Animations */
    @keyframes float {
      0%, 100% { transform: translateY(0px); }
      50% { transform: translateY(-20px); }
    }
    
    @keyframes glow {
      0%, 100% { box-shadow: 0 0 20px rgba(234, 179, 8, 0.5); }
      50% { box-shadow: 0 0 40px rgba(234, 179, 8, 0.8); }
    }

    .float-animation {
      animation: float 3s ease-in-out infinite;
    }

    .glow-animation {
      animation: glow 2s ease-in-out infinite;
    }

    /* Gradient Text */
    .gradient-text {
      background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* Dropdown Styles */
    .dropdown {
      position: relative;
      display: inline-block;
    }

    .dropdown-button {
      background-color: #3b82f6;
      color: white;
      padding: 0.5rem 1rem;
      border-radius: 0.25rem;
      font-weight: 500;
      cursor: pointer;
      border: none;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      transition: background-color 0.2s;
    }

    .dropdown-button:hover {
      background-color: #2563eb;
    }

    .dropdown-arrow {
      transition: transform 0.2s;
    }

    .dropdown.active .dropdown-arrow {
      transform: rotate(180deg);
    }

    .dropdown-menu {
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 0.5rem;
      background-color: #1f2937;
      min-width: 200px;
      border-radius: 0.5rem;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
      opacity: 0;
      visibility: hidden;
      transform: translateY(-10px);
      transition: all 0.3s ease;
      z-index: 1000;
    }

    .dropdown.active .dropdown-menu {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .dropdown-menu a {
      display: block;
      padding: 0.75rem 1rem;
      color: white;
      text-decoration: none;
      transition: background-color 0.2s;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .dropdown-menu a:first-child {
      border-radius: 0.5rem 0.5rem 0 0;
    }

    .dropdown-menu a:last-child {
      border-radius: 0 0 0.5rem 0.5rem;
      border-bottom: none;
    }

    .dropdown-menu a:hover {
      background-color: rgba(251, 191, 36, 0.1);
    }

    /* Hero Gradient Background */
    .hero-gradient {
      background: linear-gradient(135deg, #1f2937 0%, #111827 50%, #0f172a 100%);
    }

    /* Tier Card Styles */
    .tier-card {
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .tier-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #fbbf24, #f59e0b);
      transform: scaleX(0);
      transition: transform 0.3s ease;
    }

    .tier-card:hover::before {
      transform: scaleX(1);
    }

    .tier-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 40px rgba(251, 191, 36, 0.2);
      border-color: #fbbf24;
    }

    .tier-badge {
      display: inline-block;
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: white;
      padding: 0.25rem 0.75rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
      margin-bottom: 1rem;
    }

    /* Progress Bar Animation */
    @keyframes progress {
      from { width: 0; }
    }

    .progress-bar-fill {
      animation: progress 1.5s ease-out;
    }

    /* Payment Modal Styles */
    .payment-modal {
      display: none;
      position: fixed;
      z-index: 9999;
      left: 0;
      top: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0, 0, 0, 0.8);
      backdrop-filter: blur(5px);
      overflow: auto;
    }

    .modal-content {
      background-color: #1f2937;
      margin: 5% auto;
      padding: 2rem;
      border: 2px solid #fbbf24;
      border-radius: 1rem;
      width: 90%;
      max-width: 600px;
      box-shadow: 0 20px 60px rgba(251, 191, 36, 0.3);
      animation: slideIn 0.3s ease-out;
    }

    @keyframes slideIn {
      from {
        transform: translateY(-50px);
        opacity: 0;
      }
      to {
        transform: translateY(0);
        opacity: 1;
      }
    }

    .close-modal {
      color: #9ca3af;
      float: right;
      font-size: 2rem;
      font-weight: bold;
      cursor: pointer;
      transition: color 0.2s;
      line-height: 1;
      margin-top: -10px;
    }

    .close-modal:hover {
      color: #fbbf24;
    }

    /* Token Selector Grid */
    .token-selector {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1rem;
      margin-bottom: 1.5rem;
    }

    .token-option {
      background: #374151;
      border: 2px solid transparent;
      border-radius: 0.75rem;
      padding: 1rem;
      cursor: pointer;
      transition: all 0.3s ease;
      text-align: center;
    }

    .token-option:hover {
      border-color: #fbbf24;
      background: #4b5563;
    }

    .token-option.selected {
      border-color: #fbbf24;
      background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(245, 158, 11, 0.2));
      box-shadow: 0 0 20px rgba(251, 191, 36, 0.3);
    }

    .token-option .token-symbol {
      font-size: 1.25rem;
      font-weight: bold;
      color: #fbbf24;
      margin-bottom: 0.5rem;
    }

    .token-option .token-amount {
      font-size: 0.875rem;
      color: #d1d5db;
    }

    /* Loading Spinner */
    .loading-spinner {
      border: 3px solid #374151;
      border-top: 3px solid #fbbf24;
      border-radius: 50%;
      width: 20px;
      height: 20px;
      animation: spin 1s linear infinite;
      display: inline-block;
      margin-left: 10px;
    }

    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    /* Smooth Scroll */
    html {
      scroll-behavior: smooth;
    }