:root {
  --background: #222;
  --text-color: #eee;
  --darker-text: #999;
  --dot-bg: #222;
  --dot-color: #ddd;
  --dot-size: 1px;
  --dot-space: 20px;
}

body {
  font-family: monospace;
  margin-left: 10%;
  margin-right: 3em;
  margin-top: 5em;
  margin-bottom: 3em;
  background: var(--background);
  color: var(--text-color);
  font-weight: 200;
  line-height: 1.4em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  grid-gap: 6em;
}

.description {
  margin-bottom: 1.5em;
}

#polybius-container {
  margin-left: 2em;
  display: flex;
  flex-wrap: wrap;
  width: 300px;
  color: #222;
  user-select: none;
  margin-bottom: 1.5em;
  margin-top: 1em;
}

.grid-cell {
  color: var(--text-color);
  background: linear-gradient(
        90deg,
        var(--dot-bg) calc(var(--dot-space) - var(--dot-size)),
        transparent 1%
      )
      center / var(--dot-space) var(--dot-space),
    linear-gradient(
        var(--dot-bg) calc(var(--dot-space) - var(--dot-size)),
        transparent 1%
      )
      center / var(--dot-space) var(--dot-space),
    var(--dot-color);
  width: 50px;
  height: 50px;
  border: 0.5px solid #22222230;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
}

.x-label {
  position: absolute;
  margin-top: -60px;
  color: var(--darker-text);
}

.y-label {
  position: absolute;
  margin-left: -60px;
  color: var(--darker-text);
}

.bounce {
  animation: bounce 0.5s ease-in-out 1;
}

@keyframes bounce {
  to {
    transform: translateY(-1em);
    font-weight: 800;
    color: #3d00ad;
    background: #fff;
  }
}

@keyframes down {
  0% {
    padding-top: 100vh;
  }
  100% {
    padding-top: 0.925em;
  }
}

.h1 {
  font-size: 1.8em;
  line-height: 1.8em;
  margin-right: 2em;
  margin-bottom: 1em;
}

p {
  opacity: 0.9;
}

.clear {
  margin-top: -1.25em;
}

#solution {
  font-size: 1.8em;
  display: inline;
  margin-right: 0.5em;
}

.cipher {
  margin-bottom: 2em;
  color: #7f48ff;
}

.darker {
  color: var(--darker-text);
}

.button {
  user-select: none;
  font-size: 1.8em;
  padding-left: 0.5em;
  padding-right: 0.5em;
  padding-top: 0.3em;
  padding-bottom: 0.3em;
  width: 2em;
  border: 0.5px solid;
}

.disabled {
  opacity: 0.3;
}

.enabled {
  opacity: 1;
  transition: opacity 0.4s ease-out;
}

.button:hover {
  cursor: pointer;
}

.footer {
  position: fixed;
  bottom: 0em;
  padding-bottom: 0.825em;
  padding-top: .925em;
  left: 1em;
  width: 100%;
  background: var(--background);
  animation: down 1.33s ease-in-out 1;
}

a {
  color: #eee;
}

a:hover {
  color: #fff;
}

.letter {
  opacity: 0;
}

.reveal {
  opacity: 1;
  transition: opacity ease-in 0.3s;
}