body {
      font-family: 'Plus Jakarta Sans', sans-serif;
      transition: background-color 0.3s ease, color 0.3s ease;
    }
    .font-serif-custom {
      font-family: 'Instrument Serif', Georgia, serif;
    }
    .font-mono-custom {
      font-family: 'Space Mono', monospace;
    }
    .glass-card-light {
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid rgba(226, 232, 240, 0.8);
    }
    .glass-card-dark {
      background: rgba(13, 20, 36, 0.72);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .glass-nav-light {
      background: rgba(248, 250, 252, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }
    .glass-nav-dark {
      background: rgba(5, 8, 17, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .no-scrollbar::-webkit-scrollbar {
      display: none;
    }
    .no-scrollbar {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }