body {
    margin: 0;
}

#slider {
    position: relative;
    max-width: 100%;
    overflow: hidden;
    height: 300px;
}

#slides {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    max-height: 100%;
    /*CSS3 keyframes animation*/
    animation-name: slide;
    animation-duration: 10s;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in-out;
    animation-fill-mode: forwards;
}

#slides figure {
    display: inline-block;
    width: 100vw;
    max-height: 100%;
    margin: 0;
}

#slides figure img {
    width: 100%;
    /*Centrer l'image verticalement si celle-ci ne peut être affichée totalement*/
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

#slides figure figcaption {
    position: absolute;
    bottom: 0;
    padding: 2.5em 0;
    text-align: center;
    width: inherit;
    background-color: rgba(0,0,0,0.5);
    color: white;
}

.dots_commands  {
    position: absolute;
    bottom: 0;
    width: 100vw;
    padding:0;
    margin: 0;
    text-align: center;
}

.dots_commands li {
    display: inline;
    padding:0; margin:0;
}

.dots_commands label {
    position: relative;
    display: inline-block;
    height:8px; width: 8px;
    margin: 0 5px;
    text-indent: -9999px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(0,0,0,0.55) inset;
    cursor: pointer;
}

.dots_commands label:active {
    outline: none;
    background: dodgerblue;
}

#play {
    position: absolute;
    cursor: pointer;
    bottom: 2em;
    right: 2em;
    width: 0;
    height: 0;
    border-top: 1em solid transparent;
    border-bottom: 1em solid transparent;
    border-left: 1em solid rgba(255,255,255,0.7);
    display: none;
    text-indent: -9999px;
}

input[type="radio"] {
    display: none;
}

input[type="radio"]#show_slide1:checked ~ nav .dots_commands li:nth-of-type(1) label,
input[type="radio"]#show_slide2:checked ~ nav .dots_commands li:nth-of-type(2) label,
input[type="radio"]#show_slide3:checked ~ nav .dots_commands li:nth-of-type(3) label {
    outline: none;
    background: dodgerblue;
}

input[type="radio"]#show_slide1:checked ~ div#slides {
    animation: none;
    left: 0;
}

input[type="radio"]#show_slide2:checked ~ div#slides {
    animation: none;
    left: -100vw;
}

input[type="radio"]#show_slide3:checked ~ div#slides {
    animation: none;
    left: -200vw;
}

input[type="radio"]:not(:nth-last-of-type(1)):checked ~ nav label#play {
    display: block;
}

input[type="radio"]#play:checked ~ div#slides {
    animation-name: slide;
    animation-duration: 5s;
    animation-iteration-count: infinite;
    animation-timing-function: ease-in-out;
    animation-fill-mode: forwards;
}

@keyframes slide {
    0%, 20%, 100% {
        left: 0; /*1ère image*/
    }
    35%, 50% {
        left: -100vw; /*2ème image*/
    }
    70%, 95% {
        left: -200vw; /*3ème image*/
    }
}

footer {
  text-align: center;
}