html,
body {
  background-color: #fff;
  font-family: "Helvetica", "Arial", "Verdana", sans-serif;
  margin: 0;
  padding: 0;
}

.app-container {
  max-width: 100%;
  overflow: hidden;
}

.header {
  background-color: #369;
  padding: 10px 0;
}

.header > h1 {
  color: #fff;
  font-size: 24px;
  font-weight: 400;
  margin: 0;
  text-align: center;
}

.container {
  margin: 0 auto;
  padding: 20px 0;
  text-align: center;
  user-select: none;
  width: 352px;
}

.row {
  clear: left;
}

.row > div {
  border-color: #eee;
  border-style: solid;
  border-width: 2px 0 0 2px;
  color: #333;
  float: left;
  font-size: 20px;
  font-weight: bold;
  height: 48px;
  line-height: 48px;
  width: 48px;
}

.row:first-child > div {
  border-top-color: #333;
}

.row > div:first-child {
  border-left-color: #333;
}

.row > div:last-child {
  border-right: 2px solid #333;
}

.row:first-child > div,
.row:nth-child(2) > div {
  font-size: 14px;
}

.row:nth-child(3) > div:last-child {
  border-top-color: #333;
}

.row:nth-child(6) > div {
  border-bottom-color: #333;
  border-bottom-width: 2px;
}

.row:nth-child(6) > div:first-child,
.row:nth-child(6) > div:nth-child(2),
.row:nth-child(6) > div:nth-child(3) {
  border-bottom-color: #eee;
}

.row:last-child > div {
  border-top: none;
  border-bottom: 2px solid #333;
}

.row > div.top {
  border-top-color: #333 !important;
}

.row > div.right {
  border-right-color: #333 !important;
}

.row > div.bottom {
  border-bottom-color: #333 !important;
}

.row > div.left {
  border-left-color: #333 !important;
}

.row > div:hover {
  font-weight: bold;
}

.row > div.covered {
  background-color: #eee;
  color: #bbb;
  cursor: pointer;
  font-weight: normal;
}

.row > div.covered:hover {
  color: #777;
}

.navigation {
  align-items: center;
  clear: left;
  display: flex;
  gap: 20px;
  justify-content: center;
  padding-top: 20px;
  user-select: none;
}

.navigation .prev,
.navigation .next {
  background-color: #369;
  border: 1px solid #0005;
  border-radius: 3px;
  color: #fff;
  cursor: pointer;
  height: 28px;
  line-height: 28px;
  padding: 0 20px;
}

.navigation .prev:hover,
.navigation .next:hover {
  background-color: #47a;
}

.navigation .prev:active,
.navigation .next:active {
  background-color: #258;
}

.navigation .showing {
  color: #555;
  font-size: 14px;
  line-height: 14px;
  max-width: 150px;
  text-align: center;
}