.grid-container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(5, 1fr);
  width: 100%;
  max-width: var(--game-size);
  aspect-ratio: 1 / 1;
  background-color: var(--color-default);
  position: relative;
  gap: clamp(4px, 1vw, 8px);
  padding: clamp(6px, 1.5vw, 12px);
  border-radius: 12px;
  box-shadow:
    inset 0 0 20px rgba(0,0,0,0.5),
    0 10px 30px rgba(0,0,0,0.4);
  transition: opacity 0.2s ease-in-out;
}

.grid-cell {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: clamp(24px, calc(var(--game-size) * 0.11), 52px);
  font-family: Arial, sans-serif;
  font-weight: bold;
  line-height: 1;
  cursor: pointer;
  user-select: none;
  border-radius: 8px;
  transition: background-color 0.15s, color 0.15s, box-shadow 0.15s, transform 0.1s;
  background-color: rgba(0, 0, 0, 0.15);
  box-shadow: inset 2px 2px 6px rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.05);
}

.grid-cell:not(:empty) {
  background-color: #fdf6e3;
  color: #1a1a1a;
  border: none;
  box-shadow:
    inset 3px 3px 5px rgba(255, 255, 255, 1),
    inset -4px -4px 6px rgba(0, 0, 0, 0.15),
    3px 4px 6px rgba(0, 0, 0, 0.4);
}

.grid-cell:active {
  transform: scale(0.95);
}

.grid-cell.is-wildcard {
  background-color: #203a5c !important;
  color: #f5f7fb !important;
  box-shadow:
    inset 2px 2px 5px rgba(255, 255, 255, 0.12),
    inset -2px -2px 5px rgba(0, 0, 0, 0.35),
    2px 3px 5px rgba(0, 0, 0, 0.35) !important;
}

.tile-pop {
  animation: tilePopAnim 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes tilePopAnim {
  0% { transform: scale(0.7); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.word-3 {
  background-color: var(--color-3) !important;
  color: #ffffff !important;
}

.word-4 {
  background-color: var(--color-4) !important;
  color: #ffffff !important;
}

.word-5 {
  background-color: var(--color-5) !important;
  color: #ffffff !important;
}

.word-3.is-wildcard {
  background-color: #9a6720 !important;
  color: #ffffff !important;
}

.word-4.is-wildcard {
  background-color: #16752a !important;
  color: #ffffff !important;
}

.word-5.is-wildcard {
  background-color: #7c2b61 !important;
  color: #ffffff !important;
}

.hover-3 {
  background-color: rgba(217, 140, 37, 0.3) !important;
  box-shadow: inset 2px 2px 6px rgba(0,0,0,0.4), inset 0 0 20px rgba(217, 140, 37, 0.6) !important;
}

.hover-4 {
  background-color: rgba(16, 160, 32, 0.3) !important;
  box-shadow: inset 2px 2px 6px rgba(0,0,0,0.4), inset 0 0 20px rgba(16, 160, 32, 0.6) !important;
}

.hover-5 {
  background-color: rgba(176, 48, 128, 0.4) !important;
  box-shadow: inset 2px 2px 6px rgba(0,0,0,0.4), inset 0 0 20px rgba(176, 48, 128, 0.8) !important;
}

.word-badge {
  display: inline-block;
  padding: 4px 10px;
  margin: 3px 3px;
  border-radius: 6px;
  font-family: Arial, sans-serif;
  font-weight: bold;
  font-size: clamp(14px, calc(var(--game-size) * 0.04), 20px);
  color: #ffffff;
  box-shadow:
    inset 2px 2px 4px rgba(255,255,255,0.3),
    inset -2px -2px 4px rgba(0,0,0,0.3),
    1px 2px 4px rgba(0,0,0,0.4);
}

.alphabet-modal {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 82%;
  aspect-ratio: 5 / 6;
  height: auto;
  background-color: rgba(30, 74, 122, 0.95);
  backdrop-filter: blur(4px);
  display: none;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(6, 1fr);
  z-index: 20;
  border: 2px solid var(--highlight);
  box-shadow: 0 10px 40px rgba(0,0,0,0.8);
  border-radius: 12px;
  gap: 4px;
  padding: 8px;
}

.alphabet-modal.active {
  display: grid;
}

.alpha-cell {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: clamp(20px, calc(var(--game-size) * 0.08), 40px);
  font-family: Arial, sans-serif;
  font-weight: bold;
  cursor: pointer;
  user-select: none;
  border-radius: 6px;
  background-color: #fdf6e3;
  color: #1a1a1a;
  box-shadow:
    inset 2px 2px 4px rgba(255, 255, 255, 1),
    inset -3px -3px 5px rgba(0, 0, 0, 0.15),
    2px 3px 5px rgba(0, 0, 0, 0.4);
  transition: all 0.2s;
}

.alpha-cell:not(.empty-alpha):not(.used):hover {
  filter: brightness(0.9);
}

.alpha-cell:not(.empty-alpha):not(.used):active {
  transform: scale(0.95);
}

.alpha-cell.used {
  opacity: 0.4;
  pointer-events: none;
  background-color: rgba(0, 0, 0, 0.4) !important;
  box-shadow: inset 2px 2px 5px rgba(0,0,0,0.6) !important;
  color: #888 !important;
  border: 1px solid rgba(255,255,255,0.1);
}

.empty-alpha {
  background-color: transparent !important;
  box-shadow: none !important;
  cursor: default;
}

.alpha-cancel {
  grid-column: span 2;
  font-size: clamp(14px, calc(var(--game-size) * 0.05), 24px);
  background-color: #ffcccc;
}

#best-grid {
  max-width: min(70vw, 35vh, 280px);
}