@import url(http://fonts.googleapis.com/css?family=Roboto:400,100,100italic,300,300ita‌​lic,400italic,500,500italic,700,700italic,900italic,900);

body{
    font-family: 'Roboto', sans-serif;
    display: inline;
    font-weight: 300; 
    font-size: 1.15em; 
    line-height: 1.25;
    margin: 0;
}
nav{
    display: block;
    list-style:none;
    margin-left: auto;
    margin-right: 2em;
}
nav ul{
    padding:0.5em;
}
nav li{
    display: inline;
	position: relative;
    margin: 1em;
    color: white;
}
.menu{
    display:flex;
    background-color:black;
    padding: 1em 0;
}
h1{
    display: block;
    position: relative;
    font-size: 1.5em;
    margin-left: 1.35em;
}
h1 a, nav a{
    color: white;
}
h2{
    font-size: 1.3em;
    margin: 1.5em 0em 1em 0em;
}
a{
    text-decoration:none;
    color: rgb(145, 134, 134);
}
section{
    margin: 2em;
}
.time{
    margin: 0;
    padding: 0;
    font-style: italic;
    font-size: 0.8em;
}
h4{
    margin-bottom: 0.5em;
}
.cviceni-grid{
    display: grid;
    grid-template-columns: 25% 25% 25% 25%;
}
.cviceni-grid-item{
    background-color:#b2bebc;
    margin:0.5em;
    padding: 0 1em;

}
.cviceni-grid-item a{
    color: black;
}
.div--link{
    display: block;
    color: black;
}
footer{
    display: block;
    padding: 1em;
    background-color: black;
    color: white;
    text-align: center;
}
.menu-small{
    display: flex;
}
#nav-icon {
    display: none;
}
#nav-icon svg {
    width: 30px;
}
button {
    background: none;
    width: 40px;
    height: 40px;
    border: none;
    cursor: pointer;
    margin-left: auto;
    margin-right: 0.5em;
    margin-top: 1em;
}
button:focus {
    outline:0;
}


@media (max-width: 979px) {
    #nav-icon{
        display: inline;
    }
    nav{
        display: none;
    }
    .menu:hover nav, .menu{ 
        display: block;
    }
    .menu:hover nav li{
        display: block;
        width: 100%;
        margin-right: 0.5em;
        text-align: right;
    }
    .menu:hover nav ul{
        display: block;
        margin: 0;
    }
    section{
        margin:0.5em;
    }
    h1{
        margin-left: 0.5em;
    }
    .cviceni-grid{
        grid-template-columns: 1fr 1fr 1fr;
    }
    
}
@media (max-width: 767px){
    .cviceni-grid{
        grid-template-columns: 1fr 1fr;
    }
    
}
@media (max-width: 600px){
    .cviceni-grid{
        grid-template-columns: 1fr;
    }
    
}

section h3 a{
    color: black;
}
.ukol{
    margin: 1em 0;
    padding: 1em;
    background-color: black;
    color: white;
    width: fit-content;
}
.ukol-link{
    color: white;
}
.warning-for-students{
    background-color: yellow;
    font-weight: bold;
    padding: 0.5em;
    width: fit-content;
}