table {
  margin: 10px 10px 20px 10px;
}

.firstTable {
  border: 2px inset blue;
  border-spacing: 10px;
  border-radius: 10px;
  width: 70%;
}

.firstTable th,
.firstTable tr,
.firstTable td {
  border: 1px solid blue;
  border-radius: 10px;
}

.thColon1 {
  width: 75%;
}

.thColon2 {
  width: 25%;
}

.colon2,
.thirdTable td {
  text-align: center;
}

.secondTable,
.thirdTable {
  width: 70%;
}
.secondTable,
.secondTable th,
.secondTable td {
  border: 2px solid green;
  border-collapse: collapse;
}

.secondTable th {
  text-align: left;
  width: 25%;
}

.secondTable th,
.secondTable td {
  padding: 6px;
}

.secondTable th,
.secondTable td:nth-child(odd) {
  background-color: #bcdcf6;
}

.thirdTable,
.thirdTable th,
.thirdTable td {
  border: 2px dotted rgb(35, 12, 237);
  border-collapse: collapse;
}

.thirdTable tr:nth-child(even) {
  background-color: #d7ebf8;
}