    .node {
        fill: #2d3748; /* Brighter node fill */
        stroke: #4a5568; /* More visible node border */
        stroke-width: 1.5px;
      }
      .port {
        fill: #4299e1; /* Bright blue ports */
        stroke: #63b3ed; /* Lighter blue port borders */
        stroke-width: 1px;
      }
      .wire {
        stroke: #4299e1; /* Bright blue wires */
        stroke-width: 2px;
        fill: none;
      }
      .wire-casing {
        stroke: #2b6cb0; /* Darker blue wire casing */
        stro