body {
    background-color: #c0d4f3;
    font-family: 'Segoe UI', sans-serif;
  }
  .todo-container {
    max-width: 50%;
    margin: 50px auto;
    background: #ffffff79;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
  }
  @media (max-width: 768px) {
    .todo-container {
      max-width: 90%;
    }
  }
  .todo-header {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
  }
  #addTaskBtn {
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
  }
  .todo-input {
    flex-grow: 1;
    margin-right: 10px;
  }
  .task-item {
    background-color: #f0f4f8;
    padding: 10px 15px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
  }
  .task-actions button {
    margin-left: 5px;
  }
  .filter-inputs {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 20px;
  }
  .form-control, .btn {
    border-radius: 10px;
  }

  .completed {
    background-color: rgba(41, 128, 41, 0.743);
    opacity: 0.6;
    span {
        text-decoration: line-through;
        color: #333;
    }
  }

  .custom-checkbox {
    position: relative;
    display: inline-block;
    width: 24px;
    height: 24px;
  }
  
  .custom-checkbox input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  
  .checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 24px;
    width: 24px;
    background-color: #e0e0e0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
  }
  
  .checkmark i {
    color: white;
    font-size: 14px;
    display: none;
  }
  
  .custom-checkbox input:checked ~ .checkmark {
    background-color: #198754; 
  }
  
  .custom-checkbox input:checked ~ .checkmark i {
    display: block;
  }
  
  .form-select:focus,
  input:focus,
  input {
    box-shadow: none !important;
  }