style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;400;500;600;700;800&display=swap');

*{
    margin: 0;
    padding: 0;
}

body{
    background-color: #18191A;
    overflow-x: hidden;
    font-family: 'Poppins', sans-serif;
}

.uploadContainer{
    height: 200px;
    width: 90%;
    max-width: 800px;
    margin: auto;
    margin-top: 2em;
    border-radius: 20px;
    border: 2px dashed #fff;
    background-color: #222;
}

.uploadContainer:hover{
    border: 3px dashed #fff;
}

.uploadForm{
    width: 100%;
    height: 100%;
}

.fileLabel{
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.folderImg{
    width: 100px;
}

.fileInput{
    opacity: 0;
}

.text{
    color: lightgray;
    font-weight: bold;
    font-size: 1.1em;
    margin-top: 1em;
}

.previewContainer{
    width: 95%;
    max-width: 1200px;
    margin: auto;
    margin-top: 2em;
    display: grid;
    justify-items: center;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
    transition: all 1s ease-in-out;
}

.image{
    width: 150px;
    height: 200px;
    position: relative;
    transition: all .1s ease-in-out;

}

.close{
    position: absolute;
    top: -10px;
    right: -10px;
    z-index: 200;
    width: 25px;
    height: 25px;
    cursor: pointer;
}

.closeImg{
    width: 100%;
}

.image img{
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    border-radius: 15px;
}

@media screen and (min-width:650px) {
    .previewContainer{
        grid-template-columns: 1fr 1fr 1fr 1fr;
    } 
}

@media screen and (min-width:800px) {
    .previewContainer{
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
    } 
}

@media screen and (min-width:1000px) {
    .previewContainer{
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr;
    } 
}