main {
  border: 5px solid indigo;
  background: honeydew;
  padding: 5px;
}

#site-header {
  color: indigo;
  text-align: center;
  font-family: cursive;
  font-size: 70px;
  line-height: 1;
}

div {
  background: white;
}

/* GRID */
.table {
  border: 1px solid black;
  background: royalblue;
  padding: 5px;

  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto;
  grid-gap: 5px;
}
@media only screen and (min-width: 600px) {
  /* RWD */
  .table {
    grid-template-columns: repeat(4, 1fr);
  }
}
.cell {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.table-header {
  border: 1px solid black;
  background: mistyrose;
  font-family: cursive;
  font-size: 120%;
}
.table-data {
  border: 1px solid black;
  background: aliceblue;
  font-family: Verdana, sans-serif;
  font-size: 70%;
}
@media only screen and (min-width: 700px) {
  /* RWD */
  .table-data {
    font-size: 100%;
  }
}

/* figure {
  display: flex;
  justify-content: center;
  align-items: center;
} */
img {
  border: 1px solid black;
  background: white;
  height: 45%;
  width: auto;
}
@media only screen and (min-width: 700px) {
  /* RWD */
  img {
    height: 55%;
  }
}
@media only screen and (min-width: 800px) {
  /* RWD */
  img {
    height: 120px;
  }
}
a.btn {
  max-width: 80%;
  border: 1px solid blue;
  border-radius: 4px;
  padding: 4px;
  color: aliceblue;
  background: royalblue;
  text-decoration: none;
  display: inline-block;
}
@media only screen and (min-width: 600px) {
  /* RWD */
  a.btn {
    padding: 8px;
  }
}
a.btn:hover {
  color: gold;
}