.rel_div {position: relative;} .paynow {position: absolute;top: 50%;left: 0px;transform: translateY(-50%);} .paynow a {display: inline-block;background-color: rgb(219, 0, 131);color: #fff;font-size: 18px;padding: 6px 18px;border-radius: 25px;text-decoration: none;} .im-checkout {margin-bottom: 0px !important;} @media(min-width: 320px) and (max-width: 767px) {.paynow {position: absolute;top: 50%;left: 50%;transform: translate(-50%, -50%);} .paynow a {font-size: 14px;padding: 0px 12px}}