.card-training {
    position: relative;
    background: conic-gradient(from -47deg at 50% 50.14%, #77A73C 0deg,  #5D822F 360deg);
}

.card-training::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background : conic-gradient(from -47deg at 50% 50.14%, #6A5F5F 0deg,  #463F3F 360deg);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card-training:hover::before {
    opacity: 1;
}