:root {
  margin: 0;
  padding: 0;
  line-height: 1.5;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  background-color: rgb(var(--nord-1));
  color: black;

  background-image:
    radial-gradient(circle at 25% 25%, rgb(var(--nord-6)) 0 2.5%, transparent 2.5% 100%),
    radial-gradient(circle at 75% 75%, rgb(var(--nord-6)) 0 2.5%, transparent 2.5% 100%);
  background-size: 5vmin 5vmin, 5vmin 5vmin;
  background-repeat: repeat, repeat;

  /* Colors taken from the Nord palette: https://www.nordtheme.com/ */
  --nord-0: 46, 52, 64;
  --nord-1: 59, 66, 82;
  --nord-2: 67, 76, 94;
  --nord-3: 76, 86, 106;
  --nord-4: 216, 222, 233;
  --nord-5: 229, 233, 240;
  --nord-6: 236, 239, 244;
  --nord-7: 143, 188, 187;
  --nord-8: 136, 192, 208;
  --nord-9: 129, 161, 193;
  --nord-10: 94, 129, 172;
  --nord-11: 191, 97, 106;
  --nord-12: 208, 135, 112;
  --nord-13: 235, 203, 139;
  --nord-14: 163, 190, 140;
  --nord-15: 180, 142, 173;
}

@media (hover: hover) {
  :root {
    background-image:
      linear-gradient(165deg, transparent 0% 85%, rgb(var(--nord-4)) 85% 100%),
      linear-gradient(195deg, transparent 0% 70%, rgb(var(--nord-7)) 70% 100%),
      radial-gradient(circle at 25% 25%, rgb(var(--nord-6)) 0 2.5%, transparent 2.5% 100%),
      radial-gradient(circle at 75% 75%, rgb(var(--nord-6)) 0 2.5%, transparent 2.5% 100%);
    background-size: 100vw 100vh, 100vw 100vh, 5vmin 5vmin, 5vmin 5vmin;
    background-attachment: fixed;
    background-repeat: no-repeat, no-repeat, repeat, repeat;
  }
}

body {
  margin: 0;
  padding: 1rem;
  width: calc(100% - 2rem);
}

.content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: min(40rem, 80vw);
  min-height: calc(100vh - 2rem);
  margin: 0 auto;
  height: 100%;
}

.content>* {
  background: rgba(var(--nord-4), 85%);
  padding: 2rem;
  border-radius: 1em;
  box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  overflow-x: auto;
}

.content > footer {
  padding: 1em;
  font-size: small;
  text-align: center;
  margin-top: auto;
}

.smaller {
  font-size: smaller;
}

h1,
h2 {
  margin: 0;
}

textarea {
  font: inherit;
  width: calc(100% - 3em);
  margin: 0 1em;
  min-height: 8rem;

  background: rgba(var(--nord-13), 85%);
  background-origin: border-box;
  border: 1px solid rgba(0, 0, 0, 25%);
  padding: 0.5em;
}

textarea::placeholder {
  color: rgba(0, 0, 0, 50%);
}

input[type=submit],
button {
  padding: 0.5em;

  background-color: rgba(var(--nord-12), 85%);
  background-origin: border-box;
  border: 1px solid rgba(0, 0, 0, 25%);

  font: inherit;
  font-size: 1em;
  color: inherit;
}

.secondary {
  background-color: rgba(var(--nord-13), 85%);
}

select {
  background: rgba(var(--nord-13));
  color: inherit;
  font: inherit;
  background: rgba(var(--nord-13), 85%);
  background-origin: border-box;
  border: 1px solid rgba(0, 0, 0, 25%);
  padding: 0.5em;
}

table {
  width: 100%;
  text-align: center;
}

#pairs > table {
  margin-bottom: 1rem;
}

.button-row {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1em;
}

a {
  color: darkslateblue;
}

td>a {
  font-size: smaller;
}