style.css

table {
  width: 30%;
  margin: 0 auto;
  border-bottom: 3px #eee solid;
  border-collapse: collapse;
  font-size: 12px;
}
th,
td {
  padding: 5px 10px;
}
caption {
  font-weight: bold;
  font-size: 24px;
  padding: 5px;
  color: #1ba6b2;
  text-align: left;
  margin-bottom: 5px;
}
thead th {
  background: #abc668;
  color: #fff;
  border-right: 1px solid #fff;
}
thead th:last-child {
  border-right: none;
}
tbody th {
  width: 10%;
}
tbody tr:nth-child(even) {
  background: #eee;
}
tbody tr:nth-child(even) th {
  background: #ddd;
}
tbody tr:hover {
  background: #f3f5bb;
}
tbody tr:hover th {
  background: #f2f684;
  color: #1ba6b2;
}
tfoot tr {
  border-top: 6px solid #e9f7f6;
  color: #1ba6b2;
}

.cell1-row4 {
  width: 100%;
  height: 100%;
  background-color: none;
}

.iframe {
  order: 1;
  display: none;
  margin: 0;
  margin-left: 12px;
  border-radius: 1rem;
  background-color: #5be06f52;
  width: 85%;
}

.container {
  display: flex;
}

#showDialog {
  border-radius: 1rem;
}

dialog#firstDialog {
  border-style: none;
  background-color: #5be06f52;
}

.frame-pos {
  display: flex;
  order: 1;
  margin: 0;
}