.main{
    margin: 1.5%;
    width: 60%;
}
.main ul{
    flex: 1;
    flex-direction: column;
}
.main ul{
    list-style: circle;
}
.main_2 a{
    color: blueviolet;
    padding: 0;
}
.main_2 a:hover{
    color: blue;
}

.accordion {
    background-color:transparent;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
  }

  .active,
  .accordion:hover {
    background-color:lightblue;
    font-weight: bold;
  }

  .accordion:after {
    content: '\002B';
    font-weight: bold;
    float: right;
    margin-left: 5px;
  }

  .active:after {
    content: "\2212";
  }

  .panel {
    border: 1px black solid;
    padding: 0 18px;
    background-color: transparent;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-out;
  }