#main{
    width: 70%;
    margin: 0 auto;
}
#categories-div{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 1fr; 
    gap: 20px;
    padding: 20px;
}
#category-div{
    padding: 25px; 
    border-radius: 12px; 
    box-shadow: 0 4px 12px rgba(0,0,0,0.1); 
    transition: 0.3s; 
    background: #fff;
}