ul.tiles{
    position: relative;
    list-style: none;
    text-align: center;
    margin: 0;
    padding: 0;
    margin-bottom: 30px;
    margin-left: auto;
    margin-right: auto;
}

.tiles > li{
    border: 1px solid black;
    text-align: center;
    vertical-align: top;
    margin-bottom: 15px;
}

@media (min-width:1000px) {
    .tiles > li{
        width: 23%;
        height: 650px;
        margin-left: auto;
        margin-right: auto;
        display: inline-block;
    }
}

@media (min-width:560px) and (max-width:999px){
    .tiles > li{
        width: 45%;
        height: 500px;
        margin-left: auto;
        margin-right: auto;
        display: inline-block;
    }
}

@media (min-width:0px) and (max-width:559px) {
    .tiles > li{
        width: 100%;
        height: auto;
        padding-bottom: 30px;
        margin-left: auto;
        margin-right: auto;
        display: inline-block;
    }
    
    
}




@media (min-width:700px) {
    .tiles2 > li{
        width: 32%;
        height: 750px;
        margin-left: auto;
        margin-right: auto;
        display: inline-block;
    }
    .tiles2 > li > a{
        width: 160px;
        position: absolute;
        bottom: 10px;
        transform: translate(-50%, -50%);
    }
}
@media (min-width: 560px) and (max-width: 700px) {
    .tiles2 > li#tile1 > a{
        width: 150px;
        position: absolute;
        bottom: 540px;
        transform: translate(-50%, -50%);
    }
    .tiles2 > li#tile2 > a{
        width: 150px;
        position: absolute;
        bottom: 13px;
        transform: translate(-50%, -50%);
    }
}

.tiles > li > img{
    position: relative;
    height: 35%;
    width: 100%;
    margin: auto;
}

.tiles2 > li > img{
    position: relative;
    width: 100%;
    height: auto;
    margin: auto;
}

.tiles > li > b.head{
    padding-top: 10px;
}

.tiles > li > a{
    
    text-decoration: none;
    color: white;
    padding: 15px;
    background-color: red;
    border: red 1px solid;
    border-radius: 100px 100px;
}