body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(to bottom, #f0f8ff, #e6e6fa);
    color: #333;
}

.box {
    width: 150px;
    height: 150px;
    position: relative;
    cursor: pointer;
    border: 2px solid #ddd;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.box img {
    width: 100%;
    height: 100%;
}

.box:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

#result-message {
    color: #28a745;
    font-weight: bold;
}

#inventory {
    margin-top: 30px;
}

#inventory-list {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.list-group-item img {
    margin-right: 10px;
    width: 30px;
    height: 30px;
}

.hidden {
    display: none;
}

/* Уведомление о повышении уровня */
.level-up {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #4caf50;
    color: #fff;
    font-size: 24px;
    font-weight: bold;
    padding: 20px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    opacity: 0;
    z-index: 1000;
    animation: fadeInOut 3s forwards;
}

/* Скрытый элемент */
.hidden {
    display: none;
}

/* Анимация появления и исчезновения */
@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translate(-50%, -60%);
    }
    20%, 80% {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
}

.box img[src="https://i.ytimg.com/vi/OU919c0TXVA/maxresdefault.jpg"] {
    width: 150px;
    height: 150px;
    position: relative;
    cursor: pointer;
    border: 2px solid #ddd;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}