summary {
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 8px 4px;
  display: block;
}

summary::-webkit-details-marker {
  display: none;
}

.arrow {
  font-size: 12px;
  color: #666;
  transition: transform 0.2s;
  display: inline-block;
  padding: 10px
}

details[open] .arrow {
  transform: rotate(90deg);
}

table.requirements {
  border-collapse: collapse;
  font-family: Tahoma, Geneva, sans-serif;
}

table.requirements td {
  padding: 15px;
}

table.requirements thead td {
  background-color: #54585d;
  color: #ffffff;
  font-weight: bold;
  font-size: 13px;
  border: 1px solid #54585d;
}

table.requirements tbody td {
  color: #636363;
  border: 1px solid #dddfe1;
}

table.requirements tbody tr {
  background-color: #f9fafb;
}

table.requirements tbody tr:nth-child(odd) {
  background-color: #ffffff;
}