.traffic-lights-rack {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      margin: 2rem 0;
      background: #1E293B;
      padding: 1.5rem 2.5rem;
      border-radius: var(--radius-full);
      max-width: 480px;
      margin-left: auto;
      margin-right: auto;
      box-shadow: var(--shadow-xl);
    }
    .traffic-light {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: #334155;
      border: 4px solid #0F172A;
      opacity: 0.25;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .light-green.active {
      background: #10B981;
      box-shadow: 0 0 45px #10B981;
      opacity: 1;
    }
    .light-yellow.active {
      background: #F59E0B;
      box-shadow: 0 0 45px #F59E0B;
      opacity: 1;
    }
    .light-red.active {
      background: #EF4444;
      box-shadow: 0 0 45px #EF4444;
      opacity: 1;
      animation: pulse-red 1s infinite alternate;
    }
    @keyframes pulse-red {
      from { transform: scale(1); }
      to { transform: scale(1.08); }
    }
    .presentation-status-msg {
      font-size: 1.5rem;
      font-weight: 800;
      text-align: center;
      margin-top: 1rem;
      color: var(--text-primary);
    }
    @media (max-width: 560px) {
      .traffic-lights-rack {
        gap: 1.25rem;
        padding: 1rem 1.25rem;
        max-width: 100%;
        box-sizing: border-box;
      }
      .traffic-light {
        width: 60px;
        height: 60px;
      }
    }