/* === NOTHING SHOP (THEME BASED) === */
.nothing-shop {
  position: fixed;
  top: 50%;
  right: var(--space-lg);
  transform: translateY(-50%);
  width: 280px;

  background: var(--card-bg, rgba(25, 25, 25, 0.85));
  color: var(--text-color, #fff);
  border-radius: var(--radius-lg, 16px);
  border: 1px solid var(--border-color, rgba(255,255,255,0.1));
  box-shadow: var(--shadow-lg, 0 4px 24px rgba(0,0,0,0.4));
  backdrop-filter: blur(12px);
  padding: var(--space-md, 16px);
  font-family: var(--font-body, 'Poppins', sans-serif);
  z-index: 9999;
  transition: transform var(--transition-base, 0.3s ease), opacity 0.3s ease;
}

.nothing-shop h2 {
  text-align: center;
  font-size: var(--text-lg, 1.1rem);
  color: var(--accent-color, #00c6ff);
  font-weight: 600;
  margin-bottom: var(--space-md, 16px);
  text-shadow: 0 0 8px rgba(125, 249, 255, 0.25);
}

.shop-items {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  gap: var(--space-sm, 12px);
  max-height: 60vh;
  overflow-y: auto;
}

/* === ITEM CARD === */
.shop-item {
  background: var(--card-alt-bg, rgba(255, 255, 255, 0.05));
  border: 1px solid var(--border-light, rgba(255,255,255,0.1));
  border-radius: var(--radius-md, 12px);
  padding: var(--space-md, 12px);
  text-align: center;
  transition: all var(--transition-base, 0.25s ease);
}

.shop-item:hover {
  background: var(--card-hover-bg, rgba(255, 255, 255, 0.12));
  transform: scale(1.02);
}

.shop-item h3 {
  font-size: var(--text-md, 1rem);
  font-weight: 600;
  margin-bottom: var(--space-xs, 6px);
  color: var(--text-strong, #fff);
}

.shop-item p {
  font-size: var(--text-sm, 0.85rem);
  color: var(--text-secondary, #bbb);
  margin: 4px 0;
}

/* === BUTTON === */
.shop-item button {
  background: linear-gradient(
    135deg,
    var(--button-gradient-start, #00c6ff),
    var(--button-gradient-end, #0072ff)
  );
  color: var(--button-text, #fff);
  font-weight: 600;
  font-size: var(--text-sm, 0.85rem);
  border: none;
  border-radius: var(--radius-full, 999px);
  padding: var(--space-xs, 6px) var(--space-md, 14px);
  cursor: pointer;
  box-shadow: var(--shadow-sm, 0 0 8px rgba(0, 162, 255, 0.4));
  transition: all var(--transition-fast, 0.25s ease);
}

.shop-item button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md, 0 0 12px rgba(0, 162, 255, 0.7));
}

.shop-item button.owned {
  background: var(--success-gradient, linear-gradient(135deg, #34d399, #059669));
  opacity: 0.8;
  cursor: default;
}

.shop-item button.expensive {
  background: var(--error-gradient, linear-gradient(135deg, #ef4444, #991b1b));
  opacity: 0.7;
  cursor: not-allowed;
}

.shop-item button:disabled {
  background: var(--button-disabled-bg, rgba(255,255,255,0.08));
  color: var(--text-disabled, #777);
  box-shadow: none;
  cursor: not-allowed;
}

/* Purchase animation */
@keyframes purchaseSuccess {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.shop-item.purchase-animation {
  animation: purchaseSuccess 0.5s ease;
}

/* Item cost states */
.item-cost.owned {
  color: var(--success-color, #34d399);
}

.item-cost.expensive {
  color: var(--error-color, #ef4444);
}

/* Preview hover effect */
.shop-item[data-previewing="true"] {
  border-color: var(--accent-color, #00c6ff);
  box-shadow: 0 0 15px var(--accent-color, #00c6ff);
}

/* Coin update animation */
@keyframes coinUpdate {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.coin-update {
  animation: coinUpdate 0.5s ease;
}

/* === MOBILE LAYOUT === */
@media (max-width: 768px) {
  .nothing-shop {
    top: auto;
    bottom: 0;
    right: 0;
    left: 0;
    transform: none;
    width: 100%;
    border-radius: var(--radius-lg, 16px) var(--radius-lg, 16px) 0 0;
    padding: var(--space-sm, 10px);
  }

  .shop-items {
    flex-direction: row;
    overflow-x: auto;
    gap: var(--space-sm, 10px);
  }

  .shop-item {
    flex: 0 0 160px;
    min-width: 160px;
  }
}


/* === COLLAPSIBLE NOTHING SHOP === */
.nothing-shop {
  position: fixed;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  background: rgba(25, 25, 25, 0.9);
  border: 2px solid var(--border-color, rgba(255,255,255,0.2));
  border-radius: 16px;
  padding: 16px;
  color: var(--text-color, #fff);
  width: 260px;
  z-index: 9999;
  box-shadow: 0 8px 20px rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  transition: transform 0.4s cubic-bezier(0.25, 1.25, 0.5, 1), opacity 0.3s ease;
  opacity: 1;
}

.nothing-shop.closed {
  transform: translateY(-50%) translateX(110%);
  opacity: 0;
  pointer-events: none;
}

.shop-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.shop-close-btn {
  background: transparent;
  border: none;
  color: var(--text-color, #fff);
  font-size: 1.2rem;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.shop-close-btn:hover {
  transform: scale(1.2) rotate(90deg);
}

/* Shop Button inside panel */
.panel-buttons #open-shop-btn {
  font-size: 1.1rem;
  cursor: pointer;
  background: transparent;
  border: none;
  color: var(--text-color, #fff);
  transition: transform 0.2s ease, color 0.2s ease;
}

.panel-buttons #open-shop-btn:hover {
  transform: scale(1.2);
  color: var(--accent-color, gold);
}

/* Mobile behavior */
@media (max-width: 768px) {
  .nothing-shop {
    top: auto;
    bottom: 0;
    right: 0;
    left: 0;
    transform: translateY(100%);
    width: 100%;
    border-radius: 16px 16px 0 0;
    opacity: 0;
  }

  .nothing-shop.open {
    transform: translateY(0);
    opacity: 1;
    animation: shopOpenMobile 0.5s ease;
  }

  @keyframes shopOpenMobile {
    0% { transform: translateY(100%) scale(0.95); opacity: 0; }
    80% { transform: translateY(-2%) scale(1.02); opacity: 1; }
    100% { transform: translateY(0) scale(1); }
  }
}


/* Styling for the transformed textButton when the 500 point item purchased */
#useless-button.fun-mode {
  background: linear-gradient(270deg, #a06bff, #6ecbff, #6affc5, #ffd76e, #ff8dcf);
  background-size: 400% 400%;
  color: #fff;
  font-weight: 600;
  font-size: 20px;
  padding: 14px 28px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 14px;
  letter-spacing: 0.8px;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.15),
              0 0 25px rgba(255, 204, 255, 0.1);
  animation: rainbowFlow 12s ease infinite,
             softPulse 4s ease-in-out infinite;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

#useless-button.fun-mode:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.25),
              0 0 35px rgba(255, 204, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Smooth gradient flow */
@keyframes rainbowFlow {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Soft glowing pulse */
@keyframes softPulse {
  0%, 100% {
    text-shadow: 0 0 6px #fff, 0 0 12px #d8baff;
    box-shadow: 0 0 10px rgba(255,255,255,0.15),
                0 0 20px rgba(255,204,255,0.1);
  }
  50% {
    text-shadow: 0 0 10px #fff, 0 0 20px #b3e9ff;
    box-shadow: 0 0 12px rgba(255,255,255,0.25),
                0 0 25px rgba(255,204,255,0.2);
  }
}

/* Gentle shimmer line */
#useless-button.fun-mode::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    120deg,
    transparent,
    rgba(255,255,255,0.25),
    transparent
  );
  animation: shimmer 4s ease-in-out infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  50% { left: 100%; }
  100% { left: 100%; }
}