Sera,

vorrei aumentare il valore height delle immagini nella slideshow a 300px, però credo ci sia qualcosa di sbagliato nel CSS perchè da li non va, riesco solo applicando un inline-style nel tag <img>.

codice HTML:
<article id="slider">
          <input checked type="radio" name="slider" id="slide1">
          <input type="radio" name="slider" id="slide2">
          <input type="radio" name="slider" id="slide3">
          <input type="radio" name="slider" id="slide4">
                            
          <div id="slides">
              <div id="container">
                  <div class="inner">
                      <article>
                         <div class"caption">
                             <bar>Passignano Sul Trasimeno</bar>
                                  </div>
                                      <img src="https://s10.postimg.org/xy9qviyy1 /trasimeno.jpg">
                      </article>
                      <article>
                         <div class"caption">
                             <bar>Castello del Leone, Castiglione del Lago</bar>
                                </div>
                                    <img src="https://s10.postimg.org/cbuqeiv8p/trasimeno2.jpg">
                      </article>
                      <article>
                         <div class"caption">
                            <bar>Castello Borgia, Passignano sul Trasimeno</bar>
                               </div>
                                   <img src="https://s10.postimg.org/pg0ar8pvd/trasimeno3.jpg">
                      </article>
                      <article>
                         <div class"caption">
                            <bar>Castello Borgia, Passignano sul Trasimeno</bar>
                               </div>
                                   <img src="https://s10.postimg.org/pg0ar8i5l/trasimeno4.jpg">
                      </article>
                    </div>
                  </div>
                </div>
                            
                <div id="commands">
                    <label for="slide1"></label>
                    <label for="slide2"></label>
                    <label for="slide3"></label>
                    <label for="slide4"></label>
                </div>
            </article>

codice:
#slider {
    margin: 0;
    text-align: center;
    transition: all 0.5s ease-out;
}

input {
    display: none;
}

#slides {
    position: relative;
    padding: 0;
    margin: 0;
}

#container {
    width: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

#slides .inner {
    width: 500%;
    line-height: 0;
    transition: all 800ms cubic-bezier(0.770,0.000,0.175,1.000);
    transition-timing-function: cubic-bezier(0.770,0.000,0.175,1.000);
}

#slide1:checked ~ #slides .inner {
    margin-left: 0;
}

#slide2:checked ~ #slides .inner {
    margin-left: -100%;
}

#slide3:checked ~ #slides .inner {
    margin-left: -200%;
}

#slide4:checked ~ #slides .inner {
    margin-left: -300%;
}

#slides article {
    width: 20%;
    float: left;
}

article {
    display: block;
}

.caption {
    line-height: 20px;
    margin: 0 0 -150%;
    position: absolute;
    padding: 320px 12px;
    opacity: 0;
    color: #fff;
    text-transform: none;
    font-family: 'Open Sans', Arial, Helvetica, sans-serif;
    text-align: left;
    font-size: 18px;
    text-align: left;
    font-weight: normal;
    vertical-align: middle;
}

.caption bar {
    display: inline-block;
    padding: 10px;
    background: #000;
    border-radius: 3px 3px 3px 3px;
    opacity: 0.7;
}

#slide1:checked ~ #slides article:nth-child(1) .caption,
#slide2:checked ~ #slides article:nth-child(2) .caption,
#slide3:checked ~ #slides article:nth-child(3) .caption,
#slide4:checked ~ #slides article:nth-child(4) .caption {
    opacity: 1;
    transition: all 1s ease-out 0.6s;
}

article img {
    display: block;
    position: relative;
    width: 100%;
}

#commands {
    margin: -25% 0 0 0;
    width: 100%;
    height: 50px;
}

#commands label {
    display: none;
    width: 80px;
    height: 80px;
    opacity: 0.5;
    transition: opacity 0.2s ease-out;
}

#commands label:hover {
    opacity: 0.8;
}

label {
    color: #brown;
    cursor: pointer;
    text-decoration: none;
    font-style: italic;
}

label:hover {
    color: #ddd!important;
}

#slide1:checked ~ #commands label:nth-child(2),
#slide2:checked ~ #commands label:nth-child(3),
#slide3:checked ~ #commands label:nth-child(4),
#slide5:checked ~ #commands label:nth-child(1) {
    background: url('https://0.s3.envato.com/files/84450220/img/next.png') no-repeat;
    float: right;
    margin: 0 12px 0 0;
    display: block;
}

#slide2:checked ~ #commands label:nth-child(1),
#slide3:checked ~ #commands label:nth-child(2),
#slide4:checked ~ #commands label:nth-child(3),
#slide5:checked ~ #commands label:nth-child(4) {
    background:url('https://0.s3.envato.com/files/84450220/img/previous.png') no-repeat;
    float: left;
    margin: 0 0 0 -6px;
    display: block;
}

#commands, #commands label, #slides {
    transition: all 0.5s ease-out;
}

Chi mi aiuta a capire dov'è l'errore?

Questa è la situazione attuale: https://i.imgur.com/18AQwGq.jpg