.slider {
    margin: 0 auto;
    max-width: 100%;
    padding-bottom: 45%;
    width: auto\9; /* ie8 */
    position: relative;
}

.slider li {
    list-style: none;
    position: absolute;
}

.slider input {
    display: none;
}

.slider label {
    background-color: #CCCCCC;
    bottom: -20px;
    cursor: pointer;
    display: block;
    height: 7px;
    left: 20px;
    position: absolute;
    transition: 1s;
    border-radius: 100%;
    width: 7px;
    z-index: 10;
}


.slider:hover label {
    opacity: 1;
    visibility: visible;
}

.slider input:checked + label {
    background-color: #000000;
}

.slider li:nth-child(1) label {
    /* Firefox */
    left: -moz-calc(50% - 40px);
    /* WebKit */
    left: -webkit-calc(50% - 40px);
    /* Opera */
    left: -o-calc(50% - 40px);
    /* Standard */
    left: calc(50% - 40px);
}
.slider li:nth-child(2) label {
    /* Firefox */
    left: -moz-calc(50% - 20px);
    /* WebKit */
    left: -webkit-calc(50% - 20px);
    /* Opera */
    left: -o-calc(50% - 20px);
    /* Standard */
    left: calc(50% - 20px);
}
.slider li:nth-child(3) label {
    /* Firefox */
    left: -moz-calc(50% + 0px);
    /* WebKit */
    left: -webkit-calc(50% + 0px);
    /* Opera */
    left: -o-calc(50% + 0px);
    /* Standard */
    left: calc(50% + 0px);
}
.slider li:nth-child(4) label {
    /* Firefox */
    left: -moz-calc(50% + 20px);
    /* WebKit */
    left: -webkit-calc(50% + 20px);
    /* Opera */
    left: -o-calc(50% + 20px);
    /* Standard */
    left: calc(50% + 20px);
}
.slider li:nth-child(5) label {
    /* Firefox */
    left: -moz-calc(50% + 40px);
    /* WebKit */
    left: -webkit-calc(50% + 40px);
    /* Opera */
    left: -o-calc(50% + 40px);
    /* Standard */
    left: calc(50% + 40px);
}
.slider img {
    opacity: 0;
    max-width: 100%;
    height: auto;
    vertical-align: top;
    visibility: hidden;
    transition: 1s;
}
.slider li input:checked ~ img {
    opacity: 1;
    visibility: visible;
    z-index: 10;
}