::selection {
        background: #FF0000;
        color: white;
    }
         body {
         transition: background-color 0.3s ease, color 0.3s ease;
         }
         
         .bg-mesh {
         position: fixed;
         top: 0;
         left: 0;
         width: 100vw;
         height: 100vh;
         z-index: -1;
         transition: opacity 0.5s ease;
         }
         
         .dark .bg-mesh {
         background-color: #0F0F0F;
         background-image: 
         radial-gradient(circle at 15% 50%, rgba(255, 0, 0, 0.08) 0%, transparent 25%),
         radial-gradient(circle at 85% 30%, rgba(255, 0, 0, 0.05) 0%, transparent 25%);
         }
         
         .bg-mesh {
         background-color: #F9FAFB;
         background-image: 
         radial-gradient(circle at 15% 50%, rgba(255, 0, 0, 0.03) 0%, transparent 25%),
         radial-gradient(circle at 85% 30%, rgba(200, 200, 200, 0.1) 0%, transparent 25%);
         }
         
         .glass-panel {
         backdrop-filter: blur(12px);
         -webkit-backdrop-filter: blur(12px);
         transition: all 0.3s ease;
         }
         .dark .glass-panel {
         background: rgba(31, 31, 31, 0.7);
         border: 1px solid rgba(255, 255, 255, 0.08);
         box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
         }
         .glass-panel {
         background: rgba(255, 255, 255, 0.8);
         border: 1px solid rgba(0, 0, 0, 0.05);
         box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
         }
         
         @media (max-width: 640px) {
         .mobile-padding { padding-left: 1rem; padding-right: 1rem; }
         .hero-text { font-size: 2.5rem !important; }
         }
         
         .fade-in-up {
         animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
         opacity: 0;
         transform: translateY(20px);
         }
         @keyframes fadeInUp {
         to { opacity: 1; transform: translateY(0); }
         }
         .yt-spinner {
         width: 40px;
         height: 40px;
         border: 3px solid rgba(255, 0, 0, 0.1);
         border-radius: 50%;
         border-top-color: #FF0000;
         animation: spin 0.8s ease-in-out infinite;
         }
         @keyframes spin { to { transform: rotate(360deg); } }