body {
      font-family: Arial, sans-serif;
      margin: 0;
      display: flex;
      height: 100vh;
    }
    .sidebar {
      width: 200px;
      background-color: #2c3e50;
      color: white;
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .sidebar h2 {
      font-size: 18px;
      margin-top: 0;
      margin-bottom: 20px;
    }
    .sidebar-buttons {
      display: flex;
      flex-direction: column;
      gap: 5px;
    }
    .menu-button {
      display: block;
      background: none;
      border: none;
      color: white;
      text-align: left;
      padding: 10px;
      cursor: pointer;
      font-size: 16px;
      width: 100%;
    }

    .submenu-button {
      padding-left: 25px;
      font-size: 14px;
      padding-top: 6px;
      padding-bottom: 6px;
    }

    .menu-button:hover,
    .menu-button.active {
      background-color: #34495e;
    }
    .main {
      flex: 1;
      padding: 30px;
    }
    .input-group {
      margin-bottom: 20px;
    }

    input[type="text"], textarea {
      width: 400px;
      padding: 10px;
      font-size: 16px;
    }

    .error {
      color: red;
      margin-top: 5px;
      font-size: 14px;
    }
    #addNowBtn {
      margin-left: 10px;
      padding: 10px 20px;
      font-size: 16px;
    }
    #discoBtn {
      margin-left: 10px;
      padding: 10px 20px;
      font-size: 16px;
    }
    #suspendBtn {
      margin-left: 10px;
      padding: 10px 20px;
      font-size: 16px;
    }
    #enableBtn {
      margin-left: 10px;
      padding: 10px 20px;
      font-size: 16px;
    }

    .version {
      font-size: 14px;
      color: #777;
      margin-top: auto;
      padding-top: 10px;
    }

    .submenu-container {
      display: none;
      flex-direction: column;
      margin-left: 10px;
    }

    .form-group {
      margin-bottom: 15px;
    }

    .output-box {
      white-space: pre-wrap;
    }

/* Loading animation styles */
.processing-container {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: 10px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.processing-container.show {
  opacity: 1;
}

.processing-text {
  color: #666;
  font-size: 14px;
  font-style: italic;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #f3f3f3;
  border-top: 2px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Disable button during processing */
button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}