body{
    font-family:Arial,Helvetica,sans-serif;
}

.slider-img{
    height:550px;
    object-fit:cover;
}

.navbar-nav .nav-link{
    padding:15px 18px;
    font-weight:600;
}

.navbar-nav .nav-link:hover{
    color:#ffc107 !important;
}

.mega-menu{
    width:100%;
    left:0;
    right:0;
    border:none;
    border-radius:0;
    
}

.mega-menu h5{
    color:#0d6efd;
    margin-bottom:10px;
}

.card{
    transition:.3s;
}

.card:hover{
    transform:translateY(-8px);
    box-shadow:0 10px 25px rgba(0,0,0,.2);
}

#gallery img{
    transition:.4s;
}

#gallery img:hover{
    transform:scale(1.05);
}

footer a{
    font-size:22px;
    transition:.3s;
}

footer a:hover{
    color:#ffc107 !important;
}

section{
    scroll-margin-top:80px;
}
<style>
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f5f5f5;
    padding:20px;
}

.table-container{
    width:100%;
    overflow-x:auto;
}

table{
    width:100%;
    border-collapse:separate;
    border-spacing:30px 25px;   /* Horizontal space between columns */
}

td{
    vertical-align:top;
}

.picture{
    border:5px solid #333;
    text-align:center;
    padding:10px;
    background:#fff;
}

.picture img{
    width:100%;
    max-width:250px;
    height:auto;
    display:block;
    margin:auto;
}

.description{
    border:5px solid #333;
    padding:5px;
    background:#fff;
    margin-top:2px;
    line-height:1.6;
}

/* Mobile Responsive */
@media (max-width:768px){

table,
tbody,
tr,
td{
    display:block;
    width:100%;
}

table{
    border-spacing:0;
}

td{
    margin-bottom:25px;
}

.picture img{
    max-width:100%;
}

}
</style>