body { margin: 0; overflow: hidden; font-family: 'Pretendard', sans-serif; user-select: none; background-color: #87CEEB; }
canvas { display: block; }
#ui { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; }

#stats {
    position: absolute; top: 20px; left: 20px; background: rgba(0, 0, 0, 0.8); color: white;
    padding: 15px 25px; border-radius: 12px; border: 2px solid rgba(255, 255, 255, 0.2); 
    box-shadow: 0 4px 6px rgba(0,0,0,0.5); pointer-events: auto;
}
#stats h2 { margin: 5px 0; font-size: 20px; }
#stats hr { border: 1px solid #555; margin: 10px 0; }
#stats p { margin: 5px 0; font-size: 14px; color: #ccc; }

#xpBarContainer { width: 100%; height: 10px; background: #333; border-radius: 5px; margin-top: 5px; border: 1px solid #000; }
#xpBar { width: 0%; height: 100%; background: linear-gradient(90deg, #ff8a00, #e52e71); transition: width 0.1s; }

#alertBox { color: #ff5555; font-weight: bold; font-size: 18px; margin-top: 10px; min-height: 24px; transition: opacity 0.5s; }

/* Hotbar */
#hotbar {
    position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 10px; pointer-events: auto;
}
.slot {
    width: 60px; height: 60px; background: rgba(0,0,0,0.6); border: 2px solid #555; border-radius: 10px;
    position: relative; display: flex; align-items: center; justify-content: center;
    color: white; font-weight: bold; transition: 0.2s;
}
.slot.active { border-color: #ffea00; background: rgba(50,50,0,0.8); transform: scale(1.1); box-shadow: 0 0 10px #ffea00; }
.key { position: absolute; top: 5px; left: 8px; font-size: 12px; color: #aaa; }
.item { font-size: 24px; } /* emoji or egg text */

#btnPetMenu {
    position: absolute; top: 20px; right: 200px; background: #9932CC; color: white; border: 2px solid white;
    padding: 10px 20px; font-size: 18px; font-weight: bold; border-radius: 8px; cursor: pointer; pointer-events: auto;
    box-shadow: 0 4px 6px rgba(0,0,0,0.5); transition: 0.2s;
}
#btnPetMenu:hover { transform: scale(1.05); background: #8A2BE2; }

#interactionPrompt {
    position: absolute; bottom: 150px; left: 50%; transform: translateX(-50%);
    background: rgba(0,0,0,0.8); color: #00ff00; padding: 10px 20px; border-radius: 8px; font-weight: bold; font-size: 18px;
}

#shopUi {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: rgba(30, 30, 30, 0.95); color: white; padding: 30px; border-radius: 15px; border: 2px solid #ffea00;
    text-align: center; pointer-events: auto; box-shadow: 0 0 30px rgba(0,0,0,0.8);
}
#btnBuyTreadmill { background: #ffea00; border: none; padding: 10px 20px; font-size: 16px; font-weight: bold; border-radius: 8px; cursor: pointer; }

#treadmillStatus { position: absolute; top: 20px; right: 20px; text-align: right; pointer-events: auto; }
#btnInstall { background: #ff8a00; color: white; border: none; padding: 10px 20px; font-size: 16px; font-weight: bold; border-radius: 8px; cursor: pointer; }
#treadmillHint { margin-top: 10px; background: rgba(0,0,0,0.7); color: #00ff00; padding: 10px; border-radius: 8px; font-weight: bold; }

#trainingUi {
    position: absolute; top: 20%; left: 50%; transform: translateX(-50%); background: rgba(255, 50, 50, 0.9);
    color: white; padding: 20px 40px; border-radius: 20px; text-align: center; border: 4px solid white;
    box-shadow: 0 0 20px rgba(255,0,0,0.8); animation: pulse 1s infinite alternate;
}
@keyframes pulse { 0% { transform: translateX(-50%) scale(1); } 100% { transform: translateX(-50%) scale(1.05); } }

#crosshair {
    position: absolute; top: 50%; left: 50%; width: 6px; height: 6px; background-color: white;
    border-radius: 50%; transform: translate(-50%, -50%); box-shadow: 0 0 2px black;
}

/* Pet Floating Labels */
#petLabelsContainer { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; }
.pet-label {
    position: absolute; transform: translate(-50%, -50%); color: #ffd700; font-weight: bold; font-size: 14px;
    text-shadow: 1px 1px 2px #000, -1px -1px 2px #000, 1px -1px 2px #000, -1px 1px 2px #000;
}

/* Pet Modal */
#petModal {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.7);
    display: flex; align-items: center; justify-content: center; pointer-events: auto; z-index: 1000;
}
.modal-content {
    background: #222; width: 600px; max-height: 80%; padding: 20px; border-radius: 15px; border: 2px solid #555;
    display: flex; flex-direction: column; color: white;
}
.btn-primary { background: #ffea00; font-weight: bold; padding: 10px; border: none; border-radius: 5px; cursor: pointer; margin-bottom: 10px; }
.btn-secondary { background: #555; color: white; border: none; padding: 10px; border-radius: 5px; cursor: pointer; margin-bottom: 20px; }
#petList { display: flex; flex-wrap: wrap; gap: 10px; overflow-y: auto; }
.pet-card {
    background: #333; border: 2px solid #444; border-radius: 10px; padding: 10px; width: 130px; text-align: center;
}
.pet-card.equipped { border-color: #00ff00; background: rgba(0, 255, 0, 0.1); }
.pet-card button { margin-top: 10px; width: 100%; padding: 5px; cursor: pointer; border: none; border-radius: 3px; font-weight: bold; }
.btn-equip { background: #00aa00; color: white; }
.btn-unequip { background: #aa0000; color: white; }