/* Vùng khu vườn */
.garden-container {
    height: 180px;
    background: linear-gradient(180deg, #81d4fa 0%, #e1f5fe 60%, #c8e6c9 60%, #a5d6a7 100%);
    box-shadow: inset 0 0 15px rgba(0,0,0,0.1);
}

.garden-bg {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.8;
    z-index: 1;
}

/* Cây và Bưởi */
.tree-group {
    position: absolute;
    right: 15%;
    bottom: 40px;
    z-index: 2;
}

.tree {
    font-size: 5rem;
    filter: drop-shadow(2px 4px 4px rgba(0,0,0,0.3));
}

.pomelo {
    position: absolute;
    top: 15px;
    left: 25px;
    font-size: 1.5rem;
    z-index: 3;
    transition: top 0.5s cubic-bezier(0.55, 0.085, 0.68, 0.53), opacity 0.5s;
}

/* Hiệu ứng bưởi rụng vào sọt */
.falling {
    top: 70px !important;
    opacity: 0;
}

/* Sọt bưởi */
.basket {
    position: absolute;
    right: 5%;
    bottom: 25px;
    font-size: 2.5rem;
    z-index: 4;
    filter: drop-shadow(2px 2px 2px rgba(0,0,0,0.4));
}

/* Rô-bốt */
.robot {
    position: absolute;
    bottom: 30px; 
    left: 5%; 
    font-size: 3rem;
    z-index: 5;
    transition: left 0.6s ease-in-out, transform 0.2s;
    filter: drop-shadow(2px 4px 2px rgba(0,0,0,0.3));
}

/* Rung lắc khi sai */
.shake-error { animation: shake 0.4s; }
@keyframes shake {
    0% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
    100% { transform: translateX(0); }
}
.min-h-75 { min-height: 75px; }

/* Định dạng số và dấu cho nổi bật */
.hl-num { color: #d81b60; font-weight: 900; font-size: 1.2em; }