.qr-container {
    display: flex;
    gap: 40px;
    padding: 30px;
    background: #f9f9f9;
}

.qr-left {
    width: 300px;
}

.qr-left input,
.qr-left select,
.qr-left button {
    width: 100%;
    margin-bottom: 10px;
    padding: 10px;
}

.qr-right {
    display: flex;
    align-items: center;
    justify-content: center;
}


.qr-left button {
    width: 100%;
    padding: 12px;
    margin-bottom: 12px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

/* Nút Tạo QR */
#qr-generate {
    background: linear-gradient(135deg, #00c853, #64dd17);
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 200, 83, 0.3);
}

#qr-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 200, 83, 0.5);
}

/* Nút Tải QR */
#qr-download {
    background: #ffffff;
    color: #333;
    border: 2px solid #00c853;
}

#qr-download:hover {
    background: #00c853;
    color: #fff;
}