style.css

html,
body {
  width: 100%;
  padding: 0;
  margin: 0;
}

#html-table {
  min-width: 650px;
}

.masthead {
  display: grid;
  padding: 0 10px;
  margin: 10px 0;
  grid-template-columns: calc(100% - 200px) 200px;
  height: 25px;
}

.masthead h4 {
  margin: 0;
  line-height: 25px;
}

.masthead input {
  height: 100%;
  width: 100%;
  font: normal 14px sans-serif;
  display: block;
  box-sizing: border-box;
  border-radius: 4px;
  border: 1px solid #313b3f;
  outline: none;
}

.masthead .search {
  width: 200px;
  position: relative;
}

.masthead .clear {
  border: 1px solid black;
  display: none;
  border-radius: 3px;
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  padding: 1px 3px;
  font-size: 10px;
  cursor: pointer;
}

.enable-clear {
  display: block !important;
}

.masthead input::placeholder {
  font: normal 13px sans-serif;
}

main {
  overflow-x: auto;
}

.headers,
.tble-rows {
  display: grid;
  grid-template-columns: repeat(5, 20%);
}

.tble-rows:nth-child(odd) {
  background-color: lightgrey;
}

.tble-cells {
  padding: 5px 10px;
}

.headers {
  font-weight: 600;
  cursor: pointer;
}

.headers > div {
  padding: 5px 10px;
}

.tble-cells {
  white-space: nowrap;
}

#html-table {
  font-family: sans-serif;
  font-size: 13px;
  display: table;
  width: 100%;
  max-width: 768px;
  margin: 50px auto 0 auto;
}

.caret {
  transform: rotate(180deg);
  display: inline-block;
  font-size: 10px;
  margin-left: 5px;
}

footer {
  position: absolute;
  background-color: #313b3f;
  color: #d9a74a;
  width: 100%;
  padding: 10px;
  text-align: center;
  box-sizing: border-box;
  font: normal 14px sans-serif;
  bottom: 0;
}

.website {
  font: normal 14px sans-serif;
  position: fixed;
  width: 100%;
  box-sizing: border-box;
  top: 0;
  letter-spacing: 0.5px;
  display: block;
  cursor: pointer;
  background-color: #313b3f;
  padding: 10px;
  overflow: auto;
}

.website a {
  text-decoration: none;
  color: #d9a74a;
  float: right;
}

.website span {
  color: #d9a74a;
}

@media screen and (max-width: 600px) {
  #html-table {
    margin: 50px 20px 0 20px;
  }
}