@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;600;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  background: #fafafa;
  color: #111;
  min-height: 100vh;
  padding-bottom: 80px;
}

/* Back link */
.back-link {
  position: fixed;
  top: 16px;
  left: 20px;
  text-decoration: none;
  color: #999;
  font-size: 14px;
  z-index: 100;
  transition: color 0.2s;
}
.back-link:hover {
  color: #333;
}

/* Money display - sticky at top */
#money-display {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fafafa;
  text-align: center;
  padding: 32px 20px 20px;
  border-bottom: 1px solid #eee;
}

.money-label {
  font-size: 16px;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 4px;
}

.money-amount {
  font-size: clamp(2.5rem, 8vw, 6rem);
  font-weight: 700;
  color: #111;
  transition: transform 0.15s ease, color 0.3s ease;
  line-height: 1.1;
}

.money-amount.pulse-green {
  color: #0ea5e9;
  transform: scale(1.04);
}

.money-amount.pulse-red {
  color: #ef4444;
  transform: scale(1.04);
}

/* Multiplier bar */
#multiplier-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 20px;
}

.multiplier-label {
  font-size: 14px;
  color: #888;
  margin-right: 4px;
}

.multiplier-btn {
  font-family: 'Space Grotesk', sans-serif;
  padding: 6px 16px;
  border: 2px solid #ddd;
  border-radius: 20px;
  background: #fff;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: #555;
  transition: all 0.15s ease;
}

.multiplier-btn:hover {
  border-color: #111;
  color: #111;
}

.multiplier-btn.active {
  background: #111;
  color: #fff;
  border-color: #111;
}

/* Items grid */
#items-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
}

@media (max-width: 900px) {
  #items-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  #items-grid {
    grid-template-columns: 1fr;
  }
}

/* Item card */
.item-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  text-align: center;
  transition: box-shadow 0.2s ease, transform 0.15s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.item-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}

.item-card.unaffordable {
  opacity: 0.45;
  pointer-events: none;
}

.item-card.unaffordable .item-note {
  display: block;
}

.item-emoji {
  font-size: 48px;
  line-height: 1;
}

.item-name {
  font-weight: 600;
  font-size: 16px;
}

.item-price {
  font-size: 14px;
  color: #888;
}

.item-note {
  display: none;
  font-size: 12px;
  color: #ef4444;
  font-style: italic;
}

.item-quantity {
  font-size: 14px;
  color: #555;
  min-height: 20px;
}

.item-buttons {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.btn-buy, .btn-sell {
  font-family: 'Space Grotesk', sans-serif;
  border: none;
  border-radius: 10px;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s ease;
  user-select: none;
}

.btn-buy {
  background: #0ea5e9;
  color: #fff;
}

.btn-buy:hover:not(:disabled) {
  background: #0284c7;
  transform: scale(1.05);
}

.btn-buy:active:not(:disabled) {
  transform: scale(0.97);
}

.btn-buy:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.btn-sell {
  background: #ef4444;
  color: #fff;
}

.btn-sell:hover {
  background: #dc2626;
  transform: scale(1.05);
}

.btn-sell:active {
  transform: scale(0.97);
}

/* Receipt section */
#receipt-section {
  max-width: 700px;
  margin: 40px auto;
  padding: 32px 24px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

#receipt-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

#spent-display {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  color: #555;
}

#receipt-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.receipt-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: 15px;
}

.receipt-row span:last-child {
  font-weight: 600;
}

#receipt-empty {
  color: #bbb;
  font-size: 14px;
  font-style: italic;
}

/* Congrats overlay */
#congrats {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, rgba(14,165,233,0.95), rgba(6,95,70,0.95));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 200;
  text-align: center;
  padding: 40px;
}

#congrats h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  margin-bottom: 16px;
  color: #fff;
}

#congrats p {
  font-size: 20px;
  color: rgba(255,255,255,0.85);
}

.hidden {
  display: none !important;
}