/* Base for label styling */
[type="checkbox"]:not(:checked),
[type="checkbox"]:checked {
    position: absolute;
    left: -9999px;
}
[type="checkbox"]:not(:checked) + label,
[type="checkbox"]:checked + label {
    position: relative;
    padding-left: 1.95em;
    cursor: pointer;
}

/* checkbox aspect */
[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before {
    content: '';
    position: absolute;
    left: 0; top: 3px;
    width: 1em; height:1em;
    border: 1px solid #ccc;
    background: #fff;
    border-radius: 4px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,.1);
}
/* checked mark aspect */
[type="checkbox"]:not(:checked) + label:after,
[type="checkbox"]:checked + label:after {
    content: '✔';
    position: absolute;
    top: .2em;
    left: .1em;
    font-size: 1em;
    line-height: 0.8;
    color: darkgray;
    transition: all .2s;
}
/* checked mark aspect changes */
[type="checkbox"]:not(:checked) + label:after {
    opacity: 0;
    transform: scale(0);
}
[type="checkbox"]:checked + label:after {
    opacity: 1;
    transform: scale(1);
    color: darkgray;
}
/* disabled checkbox */
[type="checkbox"]:disabled:not(:checked) + label:before,
[type="checkbox"]:disabled:checked + label:before {
    box-shadow: none;
    border-color: #bbb;
    background-color: #ddd;
}
[type="checkbox"]:disabled:checked + label:after {
    color: #999;
}
[type="checkbox"]:disabled + label {
    color: #aaa;
}
/* accessibility */
[type="checkbox"]:checked:focus + label:before,
[type="checkbox"]:not(:checked):focus + label:before {
    border: 2px dotted blue;
}

/* hover style just for information */
label:hover:before {
    /*border: 2px solid #4778d9!important;*/
}






/* Useless styles, just for demo design */

body {
    font-family: "Open sans", "Segoe UI", "Segoe WP", Helvetica, Arial, sans-serif;
    color: #777;
}
h1, h2 {
    margin-bottom: .25em;
    font-weight: normal;
    text-align: center;
}
h2 {
    margin: .25em 0 2em;
    color: #aaa;
}
form {
    width: auto;
    margin: 0 auto;
}
.txtcenter {
    margin-top: 4em;
    font-size: .9em;
    text-align: center;
    color: #aaa;
}
.copy {
    margin-top: 2em;
}
.copy a {
    text-decoration: none;
    color: #4778d9;
}