body,
html {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}
.row-container {
  display: flex;
  width: 100%;
  height: 100%;
  flex-direction: column;
  background-color: rgb(247, 247, 247);
  overflow: hidden;
}
.first-row {
  background-color: lime;
}
.second-row {
  flex-grow: 1;
  border: none;
  margin: 0;
  padding: 0;
}