Session 12: Save Slot System (3 slots, autosave toggle, cross-slot import/export) + fix goldenBlooms field missing from reset()/switchSlot empty-state

css/game.css

@@ -515,6 +515,98 @@ h2, h3 {
     border-color: var(--danger);
 }
 
+/* Save Slot System */
+.footer-section {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    padding-right: 10px;
+    border-right: 1px solid var(--border-color);
+}
+
+.footer-section:last-of-type {
+    border-right: none;
+    margin-left: auto;
+}
+
+.footer-label {
+    color: var(--text-secondary);
+    font-size: 0.8rem;
+    font-weight: bold;
+}
+
+.slot-btn {
+    background: var(--bg-card);
+    color: var(--text-secondary);
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 6px 12px;
+    cursor: pointer;
+    font-weight: bold;
+    transition: all 0.2s ease;
+    min-width: 34px;
+}
+
+.slot-btn:hover:not(:disabled) {
+    background: var(--bg-hover);
+    border-color: var(--accent-purple);
+    color: var(--text-primary);
+}
+
+.slot-btn.active {
+    background: var(--accent-purple);
+    color: var(--text-primary);
+    border-color: var(--accent-gold);
+    box-shadow: 0 0 12px rgba(155, 89, 182, 0.6);
+}
+
+.slot-btn:disabled {
+    cursor: default;
+    opacity: 0.5;
+}
+
+/* Autosave toggle button */
+.toggle-btn {
+    background: var(--bg-card);
+    color: var(--text-secondary);
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    padding: 8px 14px;
+    cursor: pointer;
+    font-weight: bold;
+    transition: all 0.2s ease;
+}
+
+.toggle-btn.on {
+    background: var(--accent-green);
+    color: #0a0a1a;
+    border-color: var(--accent-green);
+}
+
+.toggle-btn:not(.on) {
+    background: var(--bg-card);
+    color: var(--text-muted);
+}
+
+/* Import modal slot selector */
+.import-slot-selector {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    margin: 12px 0;
+}
+
+.import-slot-label {
+    color: var(--text-secondary);
+    font-size: 0.85rem;
+}
+
+.modal-hint {
+    color: var(--text-muted);
+    font-size: 0.8rem;
+    margin-bottom: 10px;
+}
+
 #last-saved {
     margin-left: auto;
     color: var(--text-muted);