:root {
  color-scheme: dark;
  --bg-color: #111212;
  --inner-bg-color: #1b1c1d;
  --border-color: #313335;
  --text-color: #ffffff;
  --inactive-text-color: #aaaaaa;
  --link-color: #66ccff;
}

@font-face {
  font-family: 'Beleren Small Caps';
  src: url('fonts/beleren-small-caps.woff2');
}

@font-face {
  font-family: 'Beleren Bold';
  src: url('fonts/beleren-bold.woff2');
}

body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
}

a {
  color: var(--link-color);
}

header {
  text-align: center;
  padding: 1.5rem;
  margin: 0;
  background-color: var(--inner-bg-color);
  border-bottom: 1px solid var(--border-color);
}

.main-title {
  font-family: 'Beleren Small Caps';
  font-size: 3.5rem;
  color: var(--text-color);
  text-decoration: none;
}

nav {
  margin-top: 0.5rem;
  gap: 1.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
}

nav a {
  font-family: 'Beleren Bold';
  font-size: 1.25rem;
  color: var(--inactive-text-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

nav a:hover {
  color: var(--text-color);
}

nav a.active {
  color: var(--text-color);
  border-bottom: 2px solid var(--text-color);
}

.navigation-icon img {
  vertical-align: middle;
  max-height: 2rem;
  max-width: 2rem;
}

main {
  margin: 1.25rem;
}

main > * {
  max-width: 960px;
  margin: auto;
}

.rules {
  margin: 1.25rem;
  margin-left: auto;
  margin-right: auto;
  width: fit-content;
}

.rules ol {
  width: fit-content;
  margin: auto;
  padding-left: 1.25rem
}

.rules li {
  margin: 0.4rem 0;
}

.rules li ul {
  padding: 0;
}

.rules li li {
  margin: 0.2rem 0;
  list-style-position: inside;
}

.card-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.card-cell {
  background: var(--inner-bg-color);
  width: 17rem;
  padding: 1rem;
  font-family: 'Beleren Bold', serif;
  text-align: center;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
}

.card-cell img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 1rem;
  transform: translateZ(1px);
}