#set-board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 110px));
  gap: 8px;
  width: fit-content;
  margin: 10px auto;
  padding: 5px;
}

@media (max-width: 768px) {
  #set-board {
    grid-template-columns: repeat(4, minmax(0, 90px));
    gap: 5px;
  }
}

@media (max-width: 480px) {
  #set-board {
    grid-template-columns: repeat(4, minmax(0, 70px));
    gap: 4px;
  }
}

.set-card {
  aspect-ratio: 2/3;
  border: 2px solid #5741AC;
  border-radius: 8px;
  background: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
  padding: 8px 4px;
  max-width: 110px;
  width: 100%;
  height: auto;
}

@media (max-width: 768px) {
  .set-card {
    max-width: 90px;
    padding: 6px 3px;
  }
}

@media (max-width: 480px) {
  .set-card {
    border-radius: 6px;
    border-width: 1.5px;
    padding: 5px 2px;
    max-width: 70px;
  }
}

.set-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 12px rgba(87, 65, 172, 0.3);
}

.set-card.selected {
  border-color: #00A2FF;
  border-width: 4px;
  background: #E6F7FF;
  box-shadow: 0 0 12px rgba(0, 162, 255, 0.5);
}

.set-card.correct-flash {
  animation: correctFlash 0.6s ease-out;
}

.set-card.incorrect-shake {
  animation: incorrectShake 0.5s ease-out;
}

@keyframes correctFlash {
  0%, 100% { background: white; }
  50% { background: #D4EDDA; border-color: #28a745; }
}

@keyframes incorrectShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

/* Shape container */
.shape-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  width: 100%;
}

@media (max-width: 480px) {
  .shape-container {
    gap: 0px;
  }
}

/* Individual shapes */
.card-shape {
  width: 75px;
  height: 45px;
  min-height: 45px;
  max-height: 45px;
  flex-shrink: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-shape svg {
  width: 100%;
  height: 100%;
}

@media (max-width: 768px) {
  .card-shape {
    width: 55px;
    height: 30px;
    min-height: 30px;
    max-height: 30px;
  }
}

@media (max-width: 480px) {
  .card-shape {
    width: 40px;
    height: 24px;
    min-height: 24px;
    max-height: 24px;
  }
}


/* Color classes */
.color-red {
  stroke: #5741AC;
  fill: #5741AC;
}

.color-green {
  stroke: #00A2FF;
  fill: #00A2FF;
}

.color-purple {
  stroke: #D946EF;
  fill: #D946EF;
}

/* Shading classes */
.shading-empty {
  fill: none !important;
  stroke-width: 3;
}

.shading-striped {
  stroke-width: 3;
}

.shading-solid {
  stroke-width: 3;
}

/* Timer and counter styles */
#stopwatch {
  margin: 10px;
  font-weight: bold;
  font-size: 24px;
}

#sets-found {
  margin: 10px;
  color: #5741AC;
}

/* Pause overlay */
.paused-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  font-size: 48px;
  color: white;
  font-weight: bold;
  z-index: 100;
  border-radius: 12px;
}

.paused-overlay.active {
  display: flex;
}

/* Temporary message animation */
@keyframes fadeInOut {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
  10% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  90% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
}

/* Found sets display */
#found-sets-display {
  position: relative;
}

@media (min-width: 1024px) {
  #found-sets-display {
    min-width: 200px;
    max-width: 300px;
  }
  
  #found-sets-list {
    flex-direction: column !important;
  }
}

.found-set-item {
  display: flex;
  gap: 3px;
  padding: 6px;
  background: white;
  border: 2px solid #5741AC;
  border-radius: 6px;
  align-items: center;
  justify-content: center;
}

@media (max-width: 480px) {
  .found-set-item {
    gap: 2px;
    padding: 4px;
    border-width: 1.5px;
  }
}

.mini-card {
  aspect-ratio: 2/3;
  border: 1.5px solid #5741AC;
  border-radius: 4px;
  background: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 3px;
  width: 40px;
  height: auto;
}

@media (max-width: 480px) {
  .mini-card {
    width: 32px;
    padding: 2px;
    border-width: 1px;
  }
}

.mini-card .shape-container {
  gap: 0.5px;
}

@media (max-width: 480px) {
  .mini-card .shape-container {
    gap: 0px;
  }
}

.mini-card .card-shape {
  width: 24px;
  height: 16px;
  min-height: 16px;
  max-height: 16px;
  flex-shrink: 0;
}

@media (max-width: 480px) {
  .mini-card .card-shape {
    width: 20px;
    height: 13px;
    min-height: 13px;
    max-height: 13px;
  }
}