:root {
  --bg-0: #141816;
  --bg-1: #1c2420;
  --surface: rgba(255, 255, 255, 0.07);
  --surface-border: rgba(255, 255, 255, 0.16);
  --text: #f2f5f3;
  --text-muted: #9aa89f;
  --accent: #3dc46a;
  --accent-dark: #2ea356;
  --danger: #e84b4b;
  --danger-dark: #c53636;
  --warn: #f0c14d;
  --warn-border: #d4a017;
  --gap: clamp(0.25rem, 1.2vmin, 0.55rem);
  --radius: clamp(0.6rem, 1.6vmin, 0.9rem);
  --safe-t: max(0.5rem, env(safe-area-inset-top));
  --safe-r: max(0.5rem, env(safe-area-inset-right));
  --safe-b: max(0.5rem, env(safe-area-inset-bottom));
  --safe-l: max(0.5rem, env(safe-area-inset-left));
}

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

html {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  height: 100dvh;
  width: 100%;
  overflow: hidden;
  font-family:
    "Segoe UI",
    system-ui,
    -apple-system,
    sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 80% 55% at 50% -10%, #2a4a38 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 100%, #1a3030 0%, transparent 50%),
    var(--bg-0);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--safe-t) var(--safe-r) var(--safe-b) var(--safe-l);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.game-container {
  width: min(100%, 26rem);
  flex: 1 1 auto;
  min-height: 0;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  gap: clamp(0.4rem, 1.4vh, 0.85rem);
  padding: clamp(0.35rem, 1.2vh, 0.75rem) clamp(0.35rem, 2vw, 0.75rem);
  overflow: hidden;
}

.game-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(0.35rem, 1vh, 0.65rem);
  flex: 0 0 auto;
}

.game-title {
  margin: 0;
  font-size: clamp(1.15rem, 4.5vmin, 1.65rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--text);
}

.game-stats {
  display: flex;
  justify-content: space-between;
  width: 100%;
  gap: 0.5rem;
}

.stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  padding: 0.35rem 0.25rem;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
}

.stat-label {
  color: var(--text-muted);
  font-size: clamp(0.6rem, 2.2vmin, 0.72rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-value {
  color: var(--text);
  font-size: clamp(1rem, 3.8vmin, 1.35rem);
  font-weight: 800;
  line-height: 1.1;
}

.game-board {
  --cell-size: 0px;
  --cols: 4;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--gap);
  overflow: hidden;
}

.game-board-row {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-size));
  gap: var(--gap);
}

.game-board-cell {
  width: var(--cell-size);
  height: var(--cell-size);
  background-color: var(--surface);
  border: 1.5px solid var(--surface-border);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  font-size: min(calc(var(--cell-size) * 0.48), 2.1rem);
  line-height: 1;
  transition:
    background-color 0.35s ease,
    border-color 0.35s ease,
    opacity 0.35s ease,
    transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.game-board-cell.active {
  border-width: 3px;
  border-color: rgba(255, 255, 255, 0.45);
  opacity: 0.5;
  transform: scale(0.9);
}

.game-board-cell.resolve {
  transition: none;
  animation: cell-resolve 0.55s cubic-bezier(0.33, 1, 0.68, 1) both;
  animation-delay: calc(var(--cell-index, 0) * 90ms);
}

@keyframes cell-resolve {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(0.85);
  }
  100% {
    transform: scale(1);
  }
}

.game-board-cell.disabled {
  opacity: 0.28;
  pointer-events: none;
}

.game-board-cell.matched {
  background-color: var(--accent);
  border-color: var(--accent-dark);
}

.game-board-cell.incorrect {
  background-color: var(--warn);
  border-color: var(--warn-border);
}

.game-board-cell.not-matched {
  background-color: var(--danger);
  border-color: var(--danger-dark);
}

.game-status {
  margin: 0;
  min-height: clamp(1.75rem, 5vh, 2.4rem);
  text-align: center;
  color: var(--text-muted);
  font-size: clamp(0.8rem, 2.8vmin, 1rem);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  flex: 0 0 auto;
}

.next-btn,
.retry-btn {
  appearance: none;
  background-color: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  font-size: clamp(0.8rem, 2.6vmin, 0.95rem);
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.2s ease;
}

.next-btn:hover,
.retry-btn:hover {
  background-color: var(--accent-dark);
}

.retry-btn {
  background-color: var(--danger);
}

.retry-btn:hover {
  background-color: var(--danger-dark);
}

.emojis-picker {
  --cell-size: 0px;
  --cols: 4;
  flex: 0 0 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-size));
  gap: var(--gap);
  justify-content: center;
  overflow: hidden;
}

.emojis-picker-item {
  width: var(--cell-size);
  height: var(--cell-size);
  background-color: #f4f7f5;
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  font-size: min(calc(var(--cell-size) * 0.6), 2.5rem);
  line-height: 1;
  cursor: pointer;
  padding: 0;
  font-family: inherit;
  transition:
    background-color 0.4s ease,
    opacity 0.4s ease,
    transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.emojis-picker-item:hover:not(:disabled):not(.selected) {
  background-color: #ffffff;
}

.emojis-picker-item.selected,
.emojis-picker-item:disabled {
  background-color: #3a433e;
  cursor: default;
  opacity: 0.45;
}

.confetti-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
}

@media (orientation: landscape) and (max-height: 500px) {
  .game-container {
    width: min(100%, 36rem);
    gap: 0.35rem;
  }

  .game-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .game-title {
    font-size: 2rem;
  }

  .game-stats {
    width: auto;
    min-width: 12rem;
  }

  .stat {
    padding: 0.2rem 0.45rem;
  }
}