.numpad-container {
    margin: 30px auto;
}

.numpad-row {
    margin: 4px;
}

    .numpad-row > button {
        display: inline-block;
        margin: 0 4px;
        padding: 0;
        background-color: #fff;
        border-radius: 50%;
        border: 2px solid #ddd;
        cursor: pointer;
        width: 50px;
        height: 50px;
        text-align: center;
    }

    .numpad-row > button:active,
    .numpad-row > button:focus,
    .numpad-row > button:hover {
       background-color: #5fbd3a;
       border:2px solid #fff;
   }

   .numpad-row > button > span {
       font-size: 22px;
       font-weight: bold;
       color: #aaa;
       position: relative;
       /*top: calc(50% - 11px);*/
   }

   .numpad-row > button:hover span,
   .numpad-row > button:active span,
  .numpad-row > button:focus span {
      color: #fff;
    }

#pincode-screen {
    display: inline-block;
    border: 2px solid #ddd;
    text-align: center;
    font-size: 26px;
    width: 180px;
    height: 40px;
    margin: 4px;
}

#numpad-lg, #numpad-sm {
    display: none;
}

@media only screen and (max-height: 768px) {
    #numpad-lg {
        display: none;
    }

    #numpad-sm {
        display: block;
    }
}

@media only screen and (min-height: 768px) {
    #numpad-lg {
        display: block;
    }

    #numpad-sm {
        display: none;
    }
}