Modal in pure html and css

by Juan Muñoz

HTML

<a href="#openModal">Open Modal</a>

<div id="openModal" class="modalDialog">
    <div>	<a href="#close" title="Close" class="close">X</a>

        	<h2>Desea Modificar Comprobante?</h2>
          <center>
          <input type="button" id="aceptarSINO" value="Aceptar">
          <input type="button" id="cancelarSINO" value="Cancelar">
          </center>
    </div>
</div>

CSS

.modalDialogs {
    position: fixed;
    font-family: Arial, Helvetica, sans-serif;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 99999;
    opacity:0;
    -webkit-transition: opacity 400ms ease-in;
    -moz-transition: opacity 400ms ease-in;
    transition: opacity 400ms ease-in;
    pointer-events: none;
}
.modalDialogs:target {
    opacity:1;
    pointer-events: auto;
}
.modalDialogs > div {
    width: 400px;
    position: relative;
    margin: 10% auto;
    padding: 5px 20px 13px 20px;
    border-radius: 10px;
    background: #fff;
    background: -moz-linear-gradient(#fff, #999);
    background: -webkit-linear-gradient(#fff, #999);
    background: -o-linear-gradient(#fff, #999);
}
.closes {
    background: #606061;
    color: #FFFFFF;
    line-height: 25px;
    position: absolute;
    right: -12px;
    text-align: center;
    top: -10px;
    width: 24px;
    text-decoration: none;
    font-weight: bold;
    -webkit-border-radius: 12px;
    -moz-border-radius: 12px;
    border-radius: 12px;
    -moz-box-shadow: 1px 1px 3px #000;
    -webkit-box-shadow: 1px 1px 3px #000;
    box-shadow: 1px 1px 3px #000;
}
.closes:hover {
    background: #00d9ff;
}
#aceptarSINO{
    color: #fff;
    display: inline-block;
    padding: 6px 12px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.42857143;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -ms-touch-action: manipulation;
    touch-action: manipulation;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
    background-color: #74ad5a;
    border: 1px solid #3b6e22;
    display: inline-block;
    cursor: pointer;
    color: #fff;
    font-family: arial;
    font-size: 13px;
    font-weight: bold;
    padding: 6px 12px;
   ...