body {
            margin: 0;
            overflow: hidden;
            font-family: 'Courier New', Courier, monospace;
            background-color: #87CEEB; /* Langit */
            user-select: none;
        }

        #ui-container {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        #hud {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            color: white;
            text-shadow: 2px 2px 0 #000;
            font-size: 24px;
            font-weight: bold;
        }

        #crosshair {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 20px;
            height: 20px;
            background-color: transparent;
            border: 2px solid white;
            border-radius: 50%;
            transform: translate(-50%, -50%);
            pointer-events: none;
        }
        #crosshair::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 4px;
            height: 4px;
            background-color: red;
            transform: translate(-50%, -50%);
        }

        #overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.7);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: white;
            pointer-events: all;
            text-align: center;
            z-index: 10;
        }

        button {
            padding: 15px 30px;
            font-size: 20px;
            background-color: #4CAF50;
            color: white;
            border: none;
            cursor: pointer;
            margin-top: 20px;
            border-radius: 5px;
            font-family: 'Courier New', Courier, monospace;
            border-bottom: 5px solid #2E7D32;
        }
        button:active {
            border-bottom: 2px solid #2E7D32;
            transform: translateY(3px);
        }

        .message {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: yellow;
            font-size: 30px;
            font-weight: bold;
            text-shadow: 3px 3px 0 #000;
            opacity: 0;
            transition: opacity 0.5s;
        }

        #health-bar-container {
            width: 200px;
            height: 20px;
            background-color: #333;
            border: 2px solid white;
        }
        #health-bar {
            width: 100%;
            height: 100%;
            background-color: #f44336;
            transition: width 0.2s;
        }

        .artifact-list {
            font-size: 16px;
            text-align: right;
        }

        /* Styles Baru untuk NPC & Dialog */
        #interaction-prompt {
            position: absolute;
            top: 60%;
            left: 50%;
            transform: translateX(-50%);
            color: white;
            font-size: 18px;
            background-color: rgba(0,0,0,0.5);
            padding: 5px 10px;
            border-radius: 5px;
            display: none; /* Hidden by default */
        }

        #dialog-box {
            position: absolute;
            bottom: 50px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            background-color: rgba(0, 0, 0, 0.8);
            border: 2px solid #D4AF37; /* Warna emas */
            color: white;
            padding: 20px;
            font-size: 18px;
            display: none;
            border-radius: 10px;
            text-align: center;
        }
        #npc-name {
            color: #D4AF37;
            font-weight: bold;
            margin-bottom: 5px;
            font-size: 14px;
            text-transform: uppercase;
        }