body {
    transition: background-color 0.2s;
  }
  
  h1 {
    transition: color 7s;
    margin-bottom: 50px;
  }
  #contai-Princ{
    margin-top: 50px;
  }
  .checkbox{
    margin-right: 5px;
  }
  .dark-theme {
    background-color: #333;
    color: white;
  }
  .div-one{
    margin-top: auto;
    margin-bottom: auto;
  }
  .list-group-item {
    display: flex;
    justify-content: space-between;
  }
  .button{
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    border-radius: 5px;
  }
  .button {
    padding: 10px;
    border: 2px solid;
    border-radius: 5px;
    transition: border-color 5s ease-in-out;
  }
  
  @keyframes changeBorderColor {
    0% {
      border-color: rgb(33, 169, 171);
    }
    50% {
      border-color: rgb(0, 60, 255);
    }
    100% {
      border-color: rgb(68, 0, 128);
    }
  }
  
  .button:hover {
    animation: changeBorderColor 5s infinite;
  }
  .btn-Adicionar{
    margin-left: 10px;
  }
  .btn-toggleTheme{
    position: absolute;
    top: 45px;
    left: 45px;
    padding: 10px;
    border-radius: 100px;
    font-weight: bold;
    text-align: right;
  }
  .dark-theme h1 {
    color: #fff;
  }
  
  .dark-theme .form-control {
    background-color: #555;
    color: #fff;
  }
  
  .dark-theme .btn-success {
    background-color: #777;
  }
  
  .dark-theme .btn-primary {
    background-color: #555;
  }
  
  .dark-theme #taskList {
    color: #fff;
  }
  
  .dark-theme .list-group-item {
    border-color: #555;
    background-color: #555;
    color: #fff;
  }