html, body {
    font-family: "Arial", "Helvetica Neue", sans-serif;
    margin: 0;
    padding: 0;
}

* {
    box-sizing: border-box;
}

.slider {
    margin: 10px auto;
    max-width: 74.375rem;
}

.slick-slide {
    margin: 0px 5px;
    height: 380px;
   
}

.slick-slide img {
    max-height: 240px;  
    max-width: 170px;
    border: 1px solid #000;
}
.slick-slide img:hover {
	opacity: 0.6;
}

.slick-prev:before,
.slick-next:before {
    color: black;
    
}
.slick-next, 
.slick-prev{
    opacity: 0;
    height: 100px;
    width: 30px;
    top: 33%;
    z-index:1000;
}
.slick-next:hover,
.slick-prev:hover{
    opacity: 1;
    background: rgba(255,255,255,0.5);
}

.slick-next{                
    right: 30px;
}

.slick-prev{
    left: 15px;                
}

.obrazek {
    height: 235px;
    width: 168px;
    margin-bottom: 20px;
}
.autori{
    font-weight: bold;
}
a:focus {
    outline: medium none;
}
a:hover, a:focus {
    color: #000;
    text-decoration: underline;
}
a {
    transition: all 0.2s ease 0s;
    color: #0000dc;
    line-height: inherit;
    text-decoration: none;
    font-weight: bold;
}

p::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: #000;
}