html {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  scrollbar-gutter: stable;
}

body {
  height: 100%;
  overflow: clip;
}

#bingo {
  --off-white: #F7F7F7;
  --near-black: #101010;
  --gradient-start: #49f1fa;
  --gradient-middle: #7bb0f7;
  --gradient-end: #8d64f5;

  --gradient: linear-gradient(
    135deg,
    var(--gradient-start),
    var(--gradient-middle) 50%,
    var(--gradient-end)
  );
  --gradient-background: linear-gradient(
    135deg,
    rgb(from var(--gradient-start) r g b / 12%),
    rgb(from var(--gradient-middle) r g b / 12%) 50%,
    rgb(from var(--gradient-end) r g b / 12%)
  );
  --glass-layer: rgb(from var(--off-white) r g b / 2%);
  --white-layer: rgb(from var(--off-white) r g b / 20%);
  --dark-layer: rgb(from var(--near-black) r g b / 40%);

  --space: 4px;
  --radius: 8px;
  --line-width: 1px;
  --gradient-border-width: 2px;

  --text-small: 12px;
  --text-base: 15px;
  --text-large: calc(var(--text-small) * 2);
  --text-display: calc(var(--text-base) * 2);

  --opacity-secondary: 80%;
  --glass-blur: 20px;
  --shadow-surface: 0 6px 18px var(--dark-layer);

  --duration-fast: 200ms;
  --duration-standard: 400ms;
  --duration-long: 600ms;

  --control-height: 46px;
  --button-width: 128px;

  --hover-brightness: 1.2;
  height: 100dvh;
  min-height: 0;
  padding:
    calc(var(--space) * 4)
    calc(var(--space) * 3)
    calc(var(--space) * 12);
  overflow: clip;
  box-sizing: border-box;
  color: var(--off-white);
  font-size: var(--text-base);
  font-family: "Monument Extended", system-ui, sans-serif;
}

#bingo *,
#bingo *::before,
#bingo *::after {
  box-sizing: border-box;
}

#bingo .wrap {
  display: grid;
  grid-template-rows: max-content max-content minmax(0, 1fr);
  gap: calc(var(--space) * 4);
  height: 100%;
  min-height: 0;
  max-width: 1100px;
  margin: auto;
}

#bingo h1 {
  margin: calc(var(--space) * 4) 0 0;
  text-align: center;
  font-size: var(--text-display);
  line-height: 1;
}

#bingo button {
  border: 0;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

#bingo button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

#bingo button:focus-visible {
  outline: 0;
}

#bingo .button,
#bingo .tile {
  position: relative;
}

#bingo .button::after,
#bingo .tile::after {
  content: "";
  position: absolute;
  inset: 0;
  padding: var(--gradient-border-width);
  border-radius: var(--radius);
  background: var(--gradient);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) ease;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

#bingo .button:focus-visible::after,
#bingo .tile:focus-visible::after {
  opacity: 1;
}

#bingo .actions {
  display: flex;
  justify-content: center;
  gap: calc(var(--space) * 3);
}

#bingo .glass {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius);
}

#bingo .glass::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border: var(--line-width) solid var(--white-layer);
  border-radius: inherit;
  background: var(--glass-layer);
  backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-surface);
  pointer-events: none;
}

#bingo .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--button-width);
  height: var(--control-height);
  padding: 0 calc(var(--space) * 4);
  border-radius: var(--radius);
  background: transparent;
  color: var(--off-white);
  box-shadow: inset 0 0 0 var(--line-width) var(--white-layer);
  cursor: pointer;
  font-weight: 800;
  text-transform: uppercase;
  transition: opacity var(--duration-fast) ease;
}

#bingo .header-action .button {
  width: min(180px, 25%);
  padding: 0 calc(var(--space) * 3);
}

#bingo .shuffle-button[aria-expanded="true"]::before {
  background: var(--gradient-background), var(--dark-layer);
}

#bingo .shuffle-button[aria-expanded="true"]::after {
  opacity: 1;
}

#bingo .board-stage {
  display: grid;
  width: 100%;
  height: 100%;
  min-height: 0;
  place-items: start center;
  container-type: size;
}

#bingo .board-card {
  width: min(100cqw, 100cqh, 720px);
  aspect-ratio: 1;
  padding: calc(var(--space) * 4);
}

#bingo .board-status {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  margin: 0;
  color: rgb(from var(--off-white) r g b / var(--opacity-secondary));
  font-weight: 800;
  text-align: center;
}

#bingo .board {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: calc(var(--space) * 2);
  aspect-ratio: 1;
}

#bingo .tile {
  min-width: 0;
  min-height: 0;
  padding: 0;
  border-radius: var(--radius);
  appearance: none;
  background: transparent;
  color: var(--off-white);
  cursor: pointer;
  perspective: 720px;
  touch-action: manipulation;
}

#bingo .tile::after {
  z-index: 3;
}

#bingo .tile.winning-opportunity::after {
  animation: bingo-opportunity-pulse 2.6s ease-in-out infinite;
}

#bingo .tile.winning-opportunity:focus-visible::after {
  animation: none;
}

#bingo .tile-inner {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform var(--duration-standard) cubic-bezier(0.2, 0.75, 0.25, 1);
}

#bingo .tile.marked .tile-inner {
  transform: rotateY(180deg);
}

#bingo .tile-face {
  display: grid;
  position: absolute;
  inset: 0;
  place-items: center;
  min-width: 0;
  min-height: 0;
  padding: calc(var(--space) * 2);
  overflow: hidden;
  border: var(--line-width) solid var(--white-layer);
  border-radius: var(--radius);
  background: var(--dark-layer);
  backface-visibility: hidden;
  font-weight: 800;
  line-height: 1.06;
  text-align: center;
  transition: filter var(--duration-fast) ease;
}

#bingo .tile-back {
  transform: rotateY(180deg);
  transition:
    color var(--duration-standard) ease,
    filter var(--duration-fast) ease;
}

#bingo .tile-back::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--gradient);
  opacity: 0.12;
  pointer-events: none;
  transition: opacity var(--duration-standard) ease;
}

#bingo .tile.in-completed-line .tile-back {
  color: var(--near-black);
}

#bingo .tile.in-completed-line .tile-back::before {
  opacity: 1;
}

#bingo .tile-back::after {
  content: "✦";
  position: absolute;
  top: calc(var(--space) * 2);
  right: calc(var(--space) * 2);
  z-index: 2;
  color: rgb(from var(--off-white) r g b / 70%);
  font-size: clamp(9px, 1.4vw, 13px);
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) ease;
}

#bingo .tile.in-completed-line .tile-back::after {
  color: rgb(from var(--near-black) r g b / 70%);
  opacity: 1;
}

#bingo .tile.free .tile-back {
  letter-spacing: 0.035em;
}

#bingo .tile.free .tile-label {
  transition: opacity var(--duration-fast) ease;
}

#bingo .tile.free .tile-label.fading {
  opacity: 0;
}

#bingo .tile-label {
  display: block;
  position: relative;
  z-index: 1;
  max-width: 100%;
  font-size: 12px;
  hyphens: none;
}

#bingo .tile.is-dealing {
  animation: bingo-deal var(--duration-standard) cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: calc(var(--deal-order) * 12ms);
}

#bingo .tile.is-celebrating {
  z-index: 4;
  animation: bingo-winning-tile var(--celebration-tile-duration) cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: var(--win-delay);
}

#bingo .board-card.is-celebrating::before {
  animation: bingo-card-glow var(--celebration-card-duration) ease-out both;
}

#bingo .shuffle-confirmation {
  display: flex;
  position: absolute;
  inset: 0;
  z-index: 8;
  align-items: flex-start;
  justify-content: center;
  padding: calc(var(--space) * 4);
  border-radius: inherit;
}

#bingo .shuffle-scrim {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--dark-layer);
  opacity: 0;
  pointer-events: none;
}

#bingo .shuffle-shell {
  position: relative;
  z-index: 1;
  width: min(100%, 430px);
  height: 0;
  overflow: hidden;
}

#bingo .confirmation-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--space) * 4);
  width: 100%;
  padding: calc(var(--space) * 4);
  text-align: center;
  text-transform: uppercase;
}

#bingo .confirmation-panel strong {
  width: fit-content;
  font-size: var(--text-large);
  font-weight: 800;
  line-height: 1.2;
}

#bingo .confirmation-panel > span {
  font-size: var(--text-small);
  line-height: 1.5;
  opacity: var(--opacity-secondary);
}

#bingo .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#bingo [hidden] {
  display: none !important;
}

@keyframes bingo-deal {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bingo-winning-tile {
  0%,
  100% {
    translate: 0 0;
  }

  24% {
    translate: 0 var(--celebration-lift);
  }

  52% {
    translate: 0 3px;
  }

  70% {
    translate: 0 -3px;
  }
}

@keyframes bingo-opportunity-pulse {
  0%,
  100% {
    opacity: 0.2;
  }

  50% {
    opacity: 1;
  }
}

@keyframes bingo-card-glow {
  0%,
  100% {
    border-color: var(--white-layer);
    box-shadow: var(--shadow-surface);
  }

  22% {
    border-color: rgb(from var(--gradient-start) r g b / 58%);
    box-shadow:
      0 0 var(--celebration-cyan-glow) rgb(from var(--gradient-start) r g b / var(--celebration-cyan-opacity)),
      var(--shadow-surface);
  }

  58% {
    border-color: rgb(from var(--gradient-end) r g b / 58%);
    box-shadow:
      0 0 var(--celebration-purple-glow) rgb(from var(--gradient-end) r g b / var(--celebration-purple-opacity)),
      var(--shadow-surface);
  }
}

@media (hover: hover) {
  #bingo .button:not(:disabled):hover::after {
    opacity: 1;
  }

  #bingo .tile:hover .tile-face {
    filter: brightness(var(--hover-brightness));
  }

  #bingo .tile.winning-opportunity:hover::after {
    animation: none;
    opacity: 1;
  }
}

@media (max-width: 600px) {
  #bingo .shuffle-confirmation {
    align-items: center;
    padding: calc(var(--space) * 2);
  }
}

@media (max-width: 560px) {
  #bingo .board-card {
    padding: calc(var(--space) * 3);
  }

  #bingo .board {
    gap: var(--space);
  }

  #bingo .tile-face {
    padding: var(--space);
  }
}

@media (max-width: 360px) {
  #bingo {
    padding-inline: calc(var(--space) * 2);
  }

  #bingo .board-card {
    padding: calc(var(--space) * 2);
  }

  #bingo .actions {
    flex-wrap: wrap;
    gap: calc(var(--space) * 2);
  }

  #bingo .actions .button {
    flex: 1 1 120px;
  }
}

@media (max-width: 480px) {
  #bingo .header-action .button {
    width: min(calc(var(--button-width) + var(--space) * 2), calc((100% - var(--space) * 3) / 2));
    flex: 0 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  #bingo *,
  #bingo *::before,
  #bingo *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
    transition-duration: 0.01ms !important;
  }

  #bingo .tile.winning-opportunity::after {
    animation: none !important;
    opacity: 1;
  }
}

@media (forced-colors: active) {
  #bingo button:focus-visible {
    outline: 2px solid Highlight;
    outline-offset: 2px;
  }

  #bingo .button,
  #bingo .tile-front {
    border: 1px solid ButtonText;
    background: ButtonFace;
    color: ButtonText;
  }

  #bingo .tile-back {
    border: 2px solid Highlight;
    background: Highlight;
    color: HighlightText;
  }

  #bingo .glass::before {
    border-color: CanvasText;
    background: Canvas;
    box-shadow: none;
  }

  #bingo .button::after,
  #bingo .tile::after {
    display: none;
  }
}