.sec3 {
    background: linear-gradient(
        to right top,
        rgb(208, 249, 255),
        rgb(94, 236, 255)
    );
    min-height: 100vh;
    background-size: 100%;
}
.sec3 .slide {
    display: flex;
    justify-content: center;
    align-items: center;
}

.sec3 .slide img {
    height: 80%;
    border-radius: 25px;
    box-shadow: 0 1px 40px -10px #000;
}