.list{
    width: 1200px;
    outline: 1px solid red;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    list-style: none;
    padding: 0;
}

.item{
    flex-basis: calc((100% - 60px) / 3);
    outline: 2px solid red;
    padding: 20px;
    border-radius: 8px;
    background-color: rgba(128, 128, 128, 0.561);
}

.btn{
    background-color: red;
    padding: 10px 20px;
    border: none;
    color: aliceblue;
    border-radius: 8px;
    display: block;
    margin: 0 auto;
    margin-top: 50px;
}

img{
    width: 100%;
}