/* M1: Nhận Biết Màu Sắc - Custom Styles */


h1, h2, h3 {
    font-family: 'Baloo 2', cursive;
    color: #FF5A79;
}

.game-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Nút Back */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: #FF5A79;
    background: #fff;
    padding: 8px 16px;
    border-radius: 99px;
    box-shadow: 0 4px 10px rgba(255, 90, 121, 0.2);
    align-self: flex-start;
    margin-bottom: 20px;
    transition: transform 0.2s;
}

.back-btn:active {
    transform: scale(0.95);
}

/* Header */
.game-header {
    text-align: center;
    margin-bottom: 30px;
}

.game-header p {
    font-size: 1.1rem;
    color: #555;
    margin-bottom: 10px;
}

.score-board {
    display: inline-block;
    background: #FFD18C;
    padding: 8px 24px;
    border-radius: 99px;
    font-weight: 800;
    font-size: 1.2rem;
    color: #A0522D;
    box-shadow: 0 4px 0px #E5B26A;
}

/* Game Area */
.game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Rổ màu */
.baskets-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    flex: 1;
    padding-bottom: 20px;
}

.basket {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    position: relative;
}

.basket-box {
    width: 120px;
    height: 140px;
    border-radius: 20px 20px 40px 40px;
    position: relative;
    box-shadow: inset 0 -20px 0 rgba(0,0,0,0.1), 0 10px 15px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.bg-red { background: #FF4D4D; }
.bg-blue { background: #4D94FF; }
.bg-yellow { background: #FFD633; }

.basket.active .basket-box {
    transform: scale(1.1);
}

.basket-label {
    font-family: 'Baloo 2', cursive;
    font-weight: 700;
    font-size: 1.3rem;
    color: #555;
    background: white;
    padding: 4px 16px;
    border-radius: 20px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Items */
.items-container {
    height: 250px;
    background: rgba(255,255,255,0.6);
    border-radius: 30px;
    border: 4px dashed #FFB6C1;
    position: relative;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-content: center;
    gap: 15px;
    padding: 20px;
}

.drag-item {
    font-size: 4rem;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    transition: transform 0.2s;
    user-select: none;
    -webkit-user-select: none;
    z-index: 10;
    filter: drop-shadow(0 5px 5px rgba(0,0,0,0.2));
}

.drag-item:active {
    cursor: grabbing;
}

.drag-item.dragging {
    position: absolute;
    z-index: 100;
    transform: scale(1.2);
    /* Bỏ transition lúc kéo để mượt theo tay */
    transition: none;
}

.drag-item.matched {
    transform: scale(0);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Modal Hoàn Thành */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 1000;
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 30px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    transform: scale(0.8);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    max-width: 90%;
    width: 400px;
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.modal-icon {
    font-size: 5rem;
    animation: bounce 2s infinite;
}

.btn-play-again {
    margin-top: 20px;
    background: #FF5A79;
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1.2rem;
    font-family: 'Baloo 2', cursive;
    border-radius: 99px;
    cursor: pointer;
    box-shadow: 0 6px 0px #D83A5A;
    transition: transform 0.1s, box-shadow 0.1s;
}

.btn-play-again:active {
    transform: translateY(6px);
    box-shadow: 0 0px 0px #D83A5A;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-20px);}
    60% {transform: translateY(-10px);}
}

/* Mobile Adjustments */
@media (max-width: 600px) {
    .basket-box {
        width: 90px;
        height: 100px;
    }
    .basket-label {
        font-size: 1rem;
        padding: 4px 10px;
    }
    .drag-item {
        font-size: 3rem;
        width: 60px;
        height: 60px;
    }
    h1 {
        font-size: 1.8rem;
    }
    .score-board {
        font-size: 1rem;
    }
}