step 5.4: done

public/css/main.css

@@ -290,6 +290,256 @@ button:hover { background: #c73650; }
   color: #eadfce;
 }
 
+/* ===== Tabs ===== */
+.tabs {
+  display: flex;
+  gap: 0;
+  border-bottom: 1px solid var(--border, #3a2f27);
+  margin-bottom: 0.75rem;
+}
+
+.tab {
+  padding: 0.5rem 1.25rem;
+  background: transparent;
+  color: var(--muted, #a59a8a);
+  border: none;
+  border-bottom: 2px solid transparent;
+  cursor: pointer;
+  font-size: 0.875rem;
+  font-weight: 600;
+  transition: color 0.2s, border-color 0.2s;
+}
+
+.tab:hover {
+  color: var(--text, #eadfce);
+}
+
+.tab.active {
+  color: var(--accent, #e2822b);
+  border-bottom-color: var(--accent, #e2822b);
+}
+
+/* ===== Inventory layout ===== */
+.inventory-container {
+  display: grid;
+  grid-template-columns: 1fr 1.5fr;
+  gap: 1rem;
+}
+
+@media (max-width: 600px) {
+  .inventory-container {
+    grid-template-columns: 1fr;
+  }
+}
+
+/* ===== Equipment panel ===== */
+.equipment-panel h4 {
+  color: var(--accent, #e2822b);
+  font-size: 0.9rem;
+  margin-bottom: 0.5rem;
+}
+
+.equipment-slots {
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+}
+
+.equip-slot {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0.4rem 0.6rem;
+  background: #0f3460;
+  border-radius: 4px;
+  font-size: 0.8rem;
+  position: relative;
+}
+
+.slot-label {
+  color: var(--muted, #a59a8a);
+  text-transform: capitalize;
+  min-width: 2.5em;
+}
+
+.slot-item {
+  flex: 1;
+  text-align: right;
+}
+
+.slot-item .item-name {
+  font-weight: 600;
+}
+
+.slot-item .item-stats {
+  font-size: 0.7rem;
+  color: var(--muted, #a59a8a);
+}
+
+.btn-unequip {
+  background: transparent;
+  color: var(--danger, #c0392b);
+  border: 1px solid var(--danger, #c0392b);
+  padding: 0.15rem 0.5rem;
+  font-size: 0.7rem;
+  border-radius: 3px;
+  cursor: pointer;
+  margin-left: 0.5rem;
+}
+
+.btn-unequip:hover {
+  background: var(--danger, #c0392b);
+  color: #fff;
+}
+
+.slot-empty {
+  color: var(--muted, #a59a8a);
+  font-style: italic;
+  font-size: 0.75rem;
+}
+
+/* ===== Inventory grid ===== */
+.inventory-grid-panel h4 {
+  color: var(--accent, #e2822b);
+  font-size: 0.9rem;
+  margin-bottom: 0.5rem;
+}
+
+.inventory-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
+  gap: 0.5rem;
+  max-height: 320px;
+  overflow-y: auto;
+}
+
+.inv-item {
+  background: #0f3460;
+  border: 1px solid var(--border, #3a2f27);
+  border-radius: 4px;
+  padding: 0.5rem;
+  cursor: pointer;
+  position: relative;
+  transition: border-color 0.2s;
+}
+
+.inv-item:hover {
+  border-color: var(--accent, #e2822b);
+}
+
+.inv-item-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 0.25rem;
+}
+
+.inv-item-icon {
+  font-size: 1rem;
+}
+
+.inv-item-name {
+  font-weight: 600;
+  font-size: 0.8rem;
+  flex: 1;
+  text-align: right;
+  margin-right: 0.5rem;
+}
+
+.inv-item-rarity {
+  font-size: 0.65rem;
+  padding: 0.1rem 0.35rem;
+  border-radius: 3px;
+  text-transform: uppercase;
+  font-weight: 600;
+}
+
+.inv-item-stats {
+  font-size: 0.7rem;
+  color: var(--success, #4f9d69);
+  line-height: 1.3;
+}
+
+.inv-item-type {
+  font-size: 0.65rem;
+  color: var(--muted, #a59a8a);
+  margin-top: 0.15rem;
+}
+
+.inv-item-qty {
+  position: absolute;
+  bottom: 0.3rem;
+  right: 0.4rem;
+  font-size: 0.7rem;
+  color: var(--muted, #a59a8a);
+  font-weight: 600;
+}
+
+/* Rarity colors */
+.rarity-common { color: #b8b0a3; }
+.rarity-uncommon { color: #5fb36b; }
+.rarity-rare { color: #4a8fe0; }
+.rarity-epic { color: #a45ee0; }
+.rarity-legendary { color: #f2a23a; }
+
+.bg-rarity-common { background: rgba(184, 176, 163, 0.2); color: #b8b0a3; }
+.bg-rarity-uncommon { background: rgba(95, 179, 107, 0.2); color: #5fb36b; }
+.bg-rarity-rare { background: rgba(74, 143, 224, 0.2); color: #4a8fe0; }
+.bg-rarity-epic { background: rgba(164, 94, 224, 0.2); color: #a45ee0; }
+.bg-rarity-legendary { background: rgba(242, 162, 58, 0.2); color: #f2a23a; }
+
+/* ===== Tooltip ===== */
+.inv-item .tooltip {
+  display: none;
+  position: absolute;
+  bottom: calc(100% + 6px);
+  left: 50%;
+  transform: translateX(-50%);
+  background: #1a1a2e;
+  border: 1px solid var(--border, #3a2f27);
+  border-radius: 6px;
+  padding: 0.6rem 0.75rem;
+  min-width: 170px;
+  max-width: 220px;
+  z-index: 100;
+  pointer-events: none;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
+}
+
+.inv-item:hover .tooltip {
+  display: block;
+}
+
+.tooltip-name {
+  font-weight: 700;
+  font-size: 0.85rem;
+  margin-bottom: 0.15rem;
+}
+
+.tooltip-type {
+  font-size: 0.7rem;
+  color: var(--muted, #a59a8a);
+  margin-bottom: 0.35rem;
+}
+
+.tooltip-stats {
+  font-size: 0.75rem;
+  color: var(--success, #4f9d69);
+  line-height: 1.4;
+}
+
+.tooltip-effect {
+  font-size: 0.75rem;
+  color: var(--accent, #e2822b);
+  margin-top: 0.25rem;
+}
+
+.tooltip-level {
+  font-size: 0.7rem;
+  color: var(--muted, #a59a8a);
+  margin-top: 0.2rem;
+}
+
 /* ===== Toast notifications ===== */
 .toast {
   position: fixed;