feat: Add block breaking, HUD, and inventory system for player

styles.css

@@ -75,3 +75,57 @@ body {
     background-color: #000;
     cursor: crosshair;
 }
+
+#player-hud {
+    position: fixed;
+    bottom: 10px;
+    left: 10px;
+    width: 300px;
+    background-color: rgba(0, 0, 0, 0.7);
+    color: white;
+    padding: 10px;
+    border-radius: 5px;
+    font-family: Arial, sans-serif;
+    z-index: 1000;
+}
+
+#health-bar-container {
+    width: 100%;
+    height: 20px;
+    background-color: rgba(255, 255, 255, 0.3);
+    margin-bottom: 10px;
+    border-radius: 3px;
+}
+
+#health-bar {
+    width: 100%;
+    height: 100%;
+    background-color: #4CAF50;
+    border-radius: 3px;
+    transition: width 0.3s;
+}
+
+#inventory-container {
+    display: grid;
+    grid-template-columns: repeat(7, 1fr);
+    gap: 5px;
+}
+
+.inventory-slot {
+    width: 30px;
+    height: 30px;
+    background-color: rgba(255, 255, 255, 0.2);
+    border-radius: 3px;
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    font-size: 10px;
+    position: relative;
+    transition: transform 0.1s;
+}
+
+.inventory-slot:hover {
+    transform: scale(1.1);
+    background-color: rgba(255, 255, 255, 0.3);
+}