body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #10141a;
  color: white;
}

.inventory-page {
  max-width: 900px;
  margin: 60px auto;
  padding: 24px;
}

.inventory-page a {
  color: white;
}

.inventory-list {
  margin-top: 30px;
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.inventory-item {
  border: 1px solid #444;
  border-radius: 12px;
  padding: 18px;
}

.inventory-item button {
  margin-right: 8px;
  margin-top: 8px;
  padding: 8px 12px;
  cursor: pointer;
}

.inventory-tabs {
  display: flex;
  gap: 10px;
  margin-top: 30px;
  margin-bottom: 25px;
}

.tab-button {
  padding: 10px 20px;
  cursor: pointer;
}

.tab-button.active {
  font-weight: bold;
}

.hidden {
  display: none;
}

.equipment-list {
  display: grid;
  grid-template-columns:
    repeat(
      auto-fit,
      minmax(240px, 1fr)
    );
  gap: 16px;
}

.equipment-item {
  border: 1px solid #444;
  border-radius: 12px;
  padding: 18px;
}

.capacity-upgrade {
  margin-top: 30px;
  margin-bottom: 30px;

  border: 1px solid #444;
  border-radius: 12px;

  padding: 20px;
}

.capacity-upgrade h2 {
  margin-top: 0;
}

#capacityUpgradeButton {
  padding: 10px 18px;
  cursor: pointer;
}