* {
      box-sizing: border-box;
    }

    /* Floating Button */
    #whatsapp-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: #25D366;
      width: 60px;
      height: 60px;
      border-radius: 50%;
      box-shadow: 0 4px 8px rgba(0,0,0,0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      z-index: 9999;
    }

    #whatsapp-button img {
      width: 30px;
      height: 30px;
    }

    /* Chat Panel */
    #chat-box {
      position: fixed;
      bottom: 100px;
      right: 20px;
      width: 320px;
      background: white;
      border-radius: 10px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
      display: none;
      overflow: hidden;
      z-index: 9998;
      animation: fadeIn 0.3s ease-in-out;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .chat-header {
      background-color: #25D366;
      color: #fff;
      padding: 20px;
      text-align: center;
      position: relative;
    }

    .chat-header h3 {
      margin: 0;
      font-size: 18px;
      font-weight: bold;
      color: #fff;
    }

    .chat-header p {
      margin: 5px 0 0;
      font-size: 13px;
    }

    .chat-close {
      position: absolute;
      top: 10px;
      right: 15px;
      background: none;
      border: none;
      font-size: 20px;
      color: #fff;
      cursor: pointer;
    }

    .chat-body {
      padding: 15px;
      background-color: #f4f4f4;
    }

    .agent {
      display: flex;
      align-items: center;
      background: #fff;
      padding: 10px;
      border-radius: 8px;
      margin-bottom: 10px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
      transition: transform 0.2s;
      text-decoration: none;
      color: inherit;
    }

    .agent:hover {
      transform: scale(1.02);
    }

    .agent img {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      border: 2px solid #25D366;
      margin-right: 10px;
    }

    .agent-info {
      flex: 1;
    }

    .agent-info strong {
      font-size: 15px;
      color: #333;
    }

    .agent-info small {
      display: block;
      font-size: 12px;
      color: #888;
      margin-top: 2px;
    }

    .online-badge {
      display: inline-block;
      background: #25D366;
      color: white;
      font-size: 11px;
      padding: 3px 7px;
      border-radius: 4px;
      margin-top: 6px;
    }
    /* Hide mobile version by default */
    .chat-box-mobile {
      display: none;
    }

    /* Show mobile version on small screens (max-width 768px) */
    @media (max-width: 768px) {
      .chat-box-desktop {
        display: none;
      }
      .chat-box-mobile {
        display: block;
      }
    }