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-soft: 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%)
  );
  --surface-glass: rgb(from var(--off-white) r g b / 2%);
  --surface-interactive: rgb(from var(--off-white) r g b / 20%);
  --surface-dark: rgb(from var(--near-black) r g b / 40%);
  --line: rgb(from var(--off-white) r g b / 20%);
  --line-width: 1px;
  --gradient-border-width: 2px;
  --scrim: rgb(from var(--near-black) r g b / 50%);
  --glass-blur: 20px;
  --shadow-surface: 0 6px 18px rgb(from var(--near-black) r g b / 30%);
  --radius: 8px;
  --space: 4px;
  --text-display: 2rem;
  --text-body: 0.88rem;
  --text-label: 0.75rem;
  --tracking-control: 0.04em;
  --tracking-label: 0.08em;
  --opacity-muted: 70%;
  --duration-fast: 160ms;
  --duration-share-visible: 680ms;
  --duration-share-fade: 200ms;
  --duration-free-label: 180ms;
  --duration-tile-flip: 380ms;
  --control-height: 46px;
  --button-width: 128px;
  height: 100dvh;
  min-height: 0;
  padding: calc(var(--space) * 4) calc(var(--space) * 3) 3rem;
  overflow: clip;
  box-sizing: border-box;
  color: var(--off-white);
  font-family: "Monument Extended", Inter, system-ui, sans-serif;
  scrollbar-width: none;
}

#bingo::-webkit-scrollbar {
  display: none;
}

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

#bingo .row,
#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(--line);
  border-radius: inherit;
  background: var(--surface-glass);
  backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-surface);
  pointer-events: none;
}

#bingo .game-surface {
  display: grid;
  gap: calc(var(--space) * 4);
}

#bingo .card {
  padding: calc(var(--space) * 4);
  border-radius: var(--radius);
}

#bingo .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--button-width);
  height: var(--control-height);
  min-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(--line);
  cursor: pointer;
  font-size: var(--text-body);
  font-weight: 800;
  letter-spacing: var(--tracking-control);
  text-transform: uppercase;
  transition:
    filter var(--duration-fast) ease,
    opacity var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease;
}

#bingo .share-label {
  opacity: 1;
  transition: opacity var(--duration-share-fade) ease;
}

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

#bingo .header-action {
  margin: 0 auto;
}

#bingo .board-stage {
  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;
}

#bingo .board-status {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  margin: 0;
  color: rgb(from var(--off-white) r g b / var(--opacity-muted));
  font-size: var(--text-body);
  font-weight: 800;
  letter-spacing: var(--tracking-control);
  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.keyboard-input .tile.winning-opportunity:focus::after {
  animation: none;
  opacity: 1;
}

#bingo .tile.in-completed-line::after {
  opacity: 1;
  animation: none;
}

#bingo .tile-inner {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform var(--duration-tile-flip) 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-radius: var(--radius);
  backface-visibility: hidden;
  font-weight: 800;
  line-height: 1.06;
  text-align: center;
  transition: filter var(--duration-fast) ease;
}

#bingo .tile-front {
  border: var(--line-width) solid var(--line);
  background: var(--surface-dark);
}

#bingo .tile-back {
  border: var(--line-width) solid var(--line);
  background: var(--surface-interactive);
  color: var(--off-white);
  transform: rotateY(180deg);
  transition:
    background-color 420ms ease,
    color 420ms ease,
    filter var(--duration-fast) ease;
}

#bingo .tile-back::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: var(--gradient-background-soft);
  opacity: 0;
  pointer-events: none;
  transition: opacity 420ms ease;
}

#bingo .tile.in-completed-line .tile-back {
  background-color: var(--surface-dark);
}

#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 260ms ease;
}

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

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

#bingo .tile.free .tile-label {
  opacity: 1;
  transition: opacity var(--duration-free-label) 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;
  overflow-wrap: normal;
  word-break: normal;
  white-space: normal;
}

#bingo .tile.is-dealing {
  animation: bingo-deal 440ms 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, 900ms) cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: var(--win-delay, 0ms);
}

#bingo .board-card.is-celebrating::before {
  animation: bingo-card-glow var(--celebration-card-duration, 1.7s) 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;
  background: var(--scrim);
}

#bingo .shuffle-confirmation[hidden] {
  display: none;
}

#bingo .bingo-modal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--space) * 4);
  width: min(100%, 430px);
  padding: calc(var(--space) * 4);
  text-align: center;
  text-transform: uppercase;
}

#bingo .confirmation-panel strong {
  font-size: var(--text-body);
  letter-spacing: var(--tracking-label);
}

#bingo .confirmation-panel > span {
  font-size: var(--text-label);
  line-height: 1.35;
  opacity: var(--opacity-muted);
}

#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, -26px);
  }

  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(--line);
    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, 34px) var(--celebration-cyan-color, rgb(from var(--gradient-start) r g b / 34%)),
      var(--shadow-surface);
  }

  58% {
    border-color: rgb(from var(--gradient-end) r g b / 58%);
    box-shadow:
      0 0 var(--celebration-purple-glow, 38px) var(--celebration-purple-color, rgb(from var(--gradient-end) r g b / 36%)),
      var(--shadow-surface);
  }
}

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

  #bingo .tile:hover .tile-face {
    filter: brightness(1.16);
  }

  #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 (prefers-reduced-motion: reduce) {
  #bingo *,
  #bingo *::before,
  #bingo *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !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;
  }
}