html,
  body {
      margin: 0;
      padding: 0;
      height: 100%;
      overflow: hidden;
      background: #000;
  }

  canvas {
      position: absolute;
      width: 100%;
      height: 100%;
  }

  footer {
      position: absolute;
      bottom: 20px;
      width: 100%;
      text-align: center;
      font-family: sans-serif;
      color: rgba(255, 255, 255, 0.6);
      font-size: .9rem;
  }

  footer a {
      color: #fff;
      text-decoration: none;
  }

  .popup {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.8);
      justify-content: center;
      align-items: center;
      z-index: 10;
      animation: neonPulse 2.5s ease-in-out infinite alternate;
  }

  .popup-content {
      position: relative;
      background: #111;
      padding: 20px 30px;
      border-radius: 12px;
      box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
      max-width: 400px;
      width: 90%;
      color: white;
      font-family: sans-serif;
      animation: fadeIn .3s ease;
  }

  @keyframes fadeIn {
      from {
          transform: scale(0.9);
          opacity: 0;
      }

      to {
          transform: scale(1);
          opacity: 1;
      }
  }

  .popup-content h2 {
      margin-top: 0;
      color: hsl(200, 100%, 70%);
  }

  .popup-content label {
      display: block;
      margin-top: 10px;
  }

  .popup-content input,
  .popup-content textarea {
      width: 100%;
      background: #222;
      color: white;
      border: none;
      border-radius: 6px;
      padding: 8px;
      margin-top: 5px;
      resize: none;
  }

  .popup-content button {
      margin-top: 15px;
      width: 100%;
      background: hsl(200, 100%, 60%);
      border: none;
      color: white;
      padding: 10px;
      font-weight: bold;
      border-radius: 8px;
      cursor: pointer;
  }

  .popup-content button:hover {
      background: hsl(200, 100%, 50%);
  }

  .close {
      position: absolute;
      right: 15px;
      top: 10px;
      cursor: pointer;
      font-size: 24px;
      color: #fff;
  }

  #openForm {
      font-weight: 600;
      font-size:30px;
      color: #fff;
      text-shadow: 0 0 5px #00ffff, 0 0 15px #00ffff, 0 0 30px #00ffff;
      animation: neonPulse 2.5s ease-in-out infinite alternate;
  }

  @keyframes neonPulse {
      from {
          text-shadow:
              0 0 3px #00ffff,
              0 0 10px #00ffff,
              0 0 20px #00ffff,
              0 0 40px #00ffff;
          opacity: 0.95;
      }

      to {
          text-shadow:
              0 0 6px #0ff,
              0 0 20px #0ff,
              0 0 40px #0ff,
              0 0 60px #00ccff,
              0 0 80px #00ccff;
          opacity: 1;
      }
  }