/* [THE ENTIRE TAB] */
.tab {
  position: relative;
  margin: 2px;
  max-width: 100%;
}

/* [THE LABEL] */
.tab input {
  display: none;
}
.tab label {
  display: block;
  background: var(--black);
  color: var(--yellow);
  font-weight: bold;
  padding: 10px;
  cursor: pointer;
}
.tab label::after {
  content: "\25b6";
  position: absolute;
  right: 10px;
  top: 10px;
  display: block;
  transition: all 0.4s;
}
.tab input[type=checkbox]:checked + label::after,
.tab input[type=radio]:checked + label::after {
  transform: rotate(90deg);
}

/* [THE CONTENTS] */
.tab-content {
    padding:0px;
  overflow: hidden;
  background: #DDDDDD;
  /* CSS animation will not work with auto height */
  /* This is why we use max-height */
  transition: max-height 0.4s; 
  max-height: 0;
}
.tab-content p {
  margin: 20px;
}
.tab input:checked ~ .tab-content {
  /* Set the max-height to a large number */
  /* Or 100% viewport height */
  max-height: 3000vh;
    padding:10px;
}

li {
    margin-left: 20px;
}

/* [DOES NOT MATTER] */